CN111649510B - Vehicle, defrosting control method and defrosting control device of heat pump air conditioning system - Google Patents
Vehicle, defrosting control method and defrosting control device of heat pump air conditioning system Download PDFInfo
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- CN111649510B CN111649510B CN202010453890.7A CN202010453890A CN111649510B CN 111649510 B CN111649510 B CN 111649510B CN 202010453890 A CN202010453890 A CN 202010453890A CN 111649510 B CN111649510 B CN 111649510B
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H2001/00961—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising means for defrosting outside 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2103—Temperatures near a heat exchanger
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a defrosting control method and a defrosting control device for a vehicle and a heat pump air-conditioning system, wherein the heat pump air-conditioning system comprises an outdoor heat exchanger and an outdoor temperature sensor, a first temperature probe of the outdoor temperature sensor is separated from the air outlet side surface of the outdoor heat exchanger by a first preset distance, a second temperature probe is separated from the air outlet side surface of the outdoor heat exchanger by a second preset distance, and the method comprises the following steps: the method comprises the steps of acquiring the current outdoor temperature under the condition that the heat pump air-conditioning system operates in a heating mode, acquiring the current first probe temperature of a first temperature probe and the current second probe temperature of a second temperature probe if the current outdoor temperature is detected to be smaller than or equal to a first preset temperature threshold, and judging whether the heat pump air-conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature, so that the probability of mistaken defrosting can be effectively reduced, and the hardware cost is reduced.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a defrosting control method and a defrosting control device for a vehicle and a heat pump air conditioning system.
Background
At present, when a heat pump air-conditioning system carries out defrosting detection, rough judgment is mainly carried out according to system operation time and refrigerant side pressure drop, and the probability of wrong defrosting of the system is high. In the related art, a physical imaging method is adopted to perform imaging judgment on the surface of the heat exchanger, however, the detection method needs to process images, the system operation time is long, the cost of parts is high, and meanwhile, the sensor is easily shielded by dust, the problem of deviation of system judgment is caused, and the probability of wrong defrosting of the system is also high.
Therefore, how to effectively reduce the probability of wrong defrosting and reduce the hardware cost becomes a problem to be solved urgently at present.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a defrosting control method for a heat pump air conditioning system, wherein when the system heats, whether the heat pump air conditioning system enters a defrosting mode is determined according to the temperature obtained by a temperature sensor having two temperature probes arranged on the air outlet side of an outdoor heat exchanger, so that the probability of wrong defrosting can be effectively reduced, and the hardware cost can be reduced.
The second purpose of the invention is to provide a defrosting control device of the heat pump air conditioning system.
A third object of the invention is to propose a vehicle.
A fourth object of the invention is to propose an electronic device.
A fifth object of the present invention is to propose a computer-readable storage medium.
In order to achieve the above object, a first embodiment of the present invention provides a defrosting control method for a heat pump air conditioning system, where the heat pump air conditioning system includes an outdoor heat exchanger and an outdoor temperature sensor, where the outdoor temperature sensor includes a first temperature probe and a second temperature probe, where the first temperature probe and the second temperature probe are disposed on an air outlet side of the outdoor heat exchanger, the first temperature probe is separated from an air outlet side surface of the outdoor heat exchanger by a first preset distance, and the second temperature probe is separated from an air outlet side surface of the outdoor heat exchanger by a second preset distance, where the second preset distance is greater than the first preset distance, and the method includes: under the condition that the heat pump air-conditioning system operates in a heating mode, acquiring the current outdoor temperature; if the detected current outdoor temperature is smaller than or equal to a first preset temperature threshold value, acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe; and judging whether the heat pump air-conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature.
According to the defrosting control method of the heat pump air-conditioning system, the outdoor temperature sensor with the first temperature probe and the second temperature probe is arranged on the air outlet side of the outdoor heat exchanger, the current outdoor temperature is obtained under the condition that the heat pump air-conditioning system operates in the heating mode, if the current outdoor temperature is detected to be smaller than or equal to the first preset temperature threshold value, the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe are obtained, and whether the heat pump air-conditioning system enters the defrosting mode or not is judged according to the first probe temperature and the second probe temperature, so that the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
In addition, the defrosting control method of the heat pump air conditioning system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the defrosting control method of the heat pump air conditioning system further includes: and if the current outdoor temperature is detected to be greater than a first preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate the heating mode.
According to an embodiment of the present invention, the determining whether the heat pump air conditioning system enters the defrosting mode according to the first probe temperature and the second probe temperature includes: calculating a temperature difference value of subtracting the first probe temperature from the second probe temperature; if the temperature difference is larger than or equal to a second preset temperature threshold value, controlling the heat pump air-conditioning system to enter a defrosting mode; and if the temperature difference is smaller than a second preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate in a heating mode.
According to an embodiment of the present invention, after the temperature difference is greater than or equal to a second preset temperature threshold, the method further includes: acquiring a pressure difference value of a refrigerant flowing out of an outdoor side heat exchanger within a first preset time; if the pressure difference value is larger than or equal to a preset pressure threshold value, controlling the heat pump air-conditioning system to enter a defrosting mode; and if the pressure difference value is smaller than a preset pressure threshold value, controlling the heat pump air-conditioning system to continuously operate in a heating mode.
According to one embodiment of the invention, after the heat pump air-conditioning system is controlled to enter the defrosting mode for a first preset time, if the temperature difference value obtained by subtracting the current first probe temperature from the current second probe temperature is detected to be less than the second preset temperature threshold value, the heat pump air-conditioning system is controlled to enter the heating mode.
According to an embodiment of the present invention, the obtaining the current outdoor temperature includes: and acquiring the current outdoor temperature once every second preset time.
In order to achieve the above object, a second embodiment of the present invention provides a defrosting control device for a heat pump air conditioning system, where the heat pump air conditioning system includes an outdoor heat exchanger and an outdoor temperature sensor, where the outdoor temperature sensor includes a first temperature probe and a second temperature probe, where the first temperature probe and the second temperature probe are disposed on an air outlet side of the outdoor heat exchanger, the first temperature probe is separated from an air outlet side surface of the outdoor heat exchanger by a first preset distance, and the second temperature probe is separated from an air outlet side surface of the outdoor heat exchanger by a second preset distance, where the second preset distance is greater than the first preset distance, and the device includes: the first acquisition module is used for acquiring the current outdoor temperature under the condition that the heat pump air-conditioning system operates in a heating mode; the second acquisition module is used for acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe when the current outdoor temperature is detected to be less than or equal to the first preset temperature threshold; and the control module is used for judging whether the heat pump air-conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature.
According to the defrosting control device of the heat pump air-conditioning system, the outdoor temperature sensor with the first temperature probe and the second temperature probe is arranged on the air outlet side of the outdoor heat exchanger, the current outdoor temperature is obtained through the first obtaining module under the condition that the heat pump air-conditioning system operates in the heating mode, the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe are obtained through the second obtaining module when the current outdoor temperature is detected to be smaller than or equal to the first preset temperature threshold value, and the control module judges whether the heat pump air-conditioning system enters the defrosting mode or not according to the first probe temperature and the second probe temperature, so that the probability of mistaken defrosting can be effectively reduced, and the hardware cost is reduced.
In addition, the defrosting control device of the heat pump air conditioning system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the control module is further configured to: and if the current outdoor temperature is detected to be greater than a first preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate the heating mode.
According to an embodiment of the present invention, when the control module is configured to determine whether the heat pump air conditioning system enters the defrosting mode according to the first probe temperature and the second probe temperature, the control module includes: and calculating a temperature difference value obtained by subtracting the first probe temperature from the second probe temperature, controlling the heat pump air-conditioning system to enter a defrosting mode when the temperature difference value is greater than or equal to a second preset temperature threshold value, and controlling the heat pump air-conditioning system to continue to operate in a heating mode when the temperature difference value is less than the second preset temperature threshold value.
According to an embodiment of the present invention, the control module is further configured to: and after the temperature difference value is greater than or equal to a second preset temperature threshold value, acquiring a pressure difference value flowing out of a refrigerant of the outdoor heat exchanger within a first preset time, controlling the heat pump air-conditioning system to enter a defrosting mode when the pressure difference value is greater than or equal to a preset pressure threshold value, and controlling the heat pump air-conditioning system to continue to operate in a heating mode when the pressure difference value is less than the preset pressure threshold value.
According to an embodiment of the invention, after controlling the heat pump air conditioning system to enter the defrosting mode for a first preset time, the control module controls the heat pump air conditioning system to enter the heating mode when detecting that a temperature difference value obtained by subtracting the current first probe temperature from the current second probe temperature is smaller than the second preset temperature threshold.
According to an embodiment of the present invention, the first obtaining module is specifically configured to: and acquiring the current outdoor temperature once every second preset time.
In order to achieve the above object, a third aspect of the present invention provides a vehicle including the defrosting control apparatus of the heat pump air conditioning system.
According to the vehicle provided by the embodiment of the invention, through the defrosting control device of the heat pump air conditioning system, the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
To achieve the above object, a fourth aspect of the present invention provides an electronic device, including: the defrosting control method of the heat pump air conditioning system comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the defrosting control method of the heat pump air conditioning system is realized.
According to the electronic equipment provided by the embodiment of the invention, by executing the defrosting control method of the heat pump air conditioning system, the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
In order to achieve the above object, a fifth embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the defrosting control method of the heat pump air conditioning system.
The computer-readable storage medium provided by the embodiment of the invention can effectively reduce the probability of wrong defrosting and reduce the hardware cost by executing the defrosting control method of the heat pump air-conditioning system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic structural view of a heat pump air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart of a defrosting control method of a heat pump air conditioning system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a defrost control method of a heat pump air conditioning system according to one embodiment of the present invention;
fig. 4 is a flowchart of a defrost control method of a heat pump air conditioning system according to another embodiment of the present invention;
FIG. 5 is a flow chart of a defrost control method for a heat pump air conditioning system according to an embodiment of the present invention;
FIG. 6 is a block schematic diagram of a defrost control for a heat pump air conditioning system in accordance with an embodiment of the present invention; and
FIG. 7 is a block schematic diagram of a vehicle in accordance with an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A defrosting control method of a heat pump air conditioning system, a defrosting control device of a heat pump air conditioning system, a vehicle having the defrosting control device of the heat pump air conditioning system, an electronic apparatus, and a computer-readable storage medium according to embodiments of the present invention are described below with reference to the accompanying drawings.
In an embodiment of the invention, the heat pump air conditioning system comprises an outdoor side heat exchanger and an outdoor temperature sensor, wherein the outdoor temperature sensor comprises a first temperature probe and a second temperature probe, the first temperature probe and the second temperature probe are arranged on the air outlet side of the outdoor side heat exchanger, the first temperature probe is separated from the air outlet side surface of the outdoor side heat exchanger by a first preset distance, the second temperature probe is separated from the air outlet side surface of the outdoor side heat exchanger by a second preset distance, and the second preset distance is larger than the first preset distance. For example, the second preset distance may be 2mm, and the first preset distance may be 0.5 mm.
Specifically, as shown in fig. 1, the heat pump air conditioning system includes a compressor 01, a four-way valve 02, an outdoor side heat exchanger 03, a bidirectional electronic expansion valve 04, an indoor side heat exchanger 05, a gas-liquid separator 06, a temperature sensor 07, an outdoor temperature sensor 08, and a temperature pressure sensor 09. An exhaust port of the compressor 01 is connected with a first port 1# of the four-way valve 02, a second port 2# of the four-way valve 02 is connected with one end of the indoor side heat exchanger 05, the other end of the indoor side heat exchanger 05 is connected with one end of the two-way electronic expansion valve 04, the other end of the two-way electronic expansion valve 04 is connected with one end of the outdoor side heat exchanger 03, the other end of the outdoor side heat exchanger 03 is connected with a fourth port 4# of the four-way valve 02, a third port 3# of the four-way valve 02 is connected with one end of the gas-liquid separator 06, and the other end of the gas-liquid separator 06 is connected with a return air port of the compressor 01. The outdoor temperature sensor 08 comprises a first temperature probe 1# and a second temperature probe 2#, the first temperature probe 1# and the second temperature probe 2# are arranged on the air outlet side of the outdoor heat exchanger 03, the first temperature probe 1# and the air outlet side surface of the outdoor heat exchanger 03 are separated by a first preset distance, the second temperature probe 2# and the air outlet side surface of the outdoor heat exchanger 03 are separated by a second preset distance, and the second preset distance is larger than the first preset distance. The outdoor temperature sensor 08 may be disposed apart from the air outlet side of the outdoor side heat exchanger 03, and the temperature pressure sensor 09 is disposed between the other end of the outdoor side heat exchanger 03 and the fourth port 4# of the four-way valve 02.
When the heat pump air-conditioning system operates in a refrigeration mode, a refrigerant sequentially flows through the compressor 01, the inlet of the No. 1 port of the four-way valve 02, the outlet of the No. 4 port of the four-way valve 02, the outdoor heat exchanger 03, the two-way electronic expansion valve 04, the indoor heat exchanger 05, the inlet of the No. 2 port of the four-way valve 02, the outlet of the No. 3 port of the four-way valve 02 and the gas-liquid separator 06, and finally returns to the compressor 01.
When the heat pump air-conditioning system operates in a heating mode, a refrigerant sequentially flows through the compressor 01, the inlet of the No. 1 port of the four-way valve 02, the outlet of the No. 2 port of the four-way valve 02, the indoor side heat exchanger 05, the two-way electronic expansion valve 04, the outdoor side heat exchanger 03, the inlet of the No. 4 port of the four-way valve 02, the outlet of the No. 3 port of the four-way valve 02 and the gas-liquid separator 06, and finally returns to the compressor 01. When refrigerant side ability can't satisfy the heating demand, can start coolant heating system, wherein, coolant heating system includes: the warm air core body 012, the water heating heater 011 and the electronic water pump 010, when the cooling liquid heating system is started, the circulation sequence of the cooling liquid is the electronic water pump 010, the water heating heater 011 and the warm air core body 012 in sequence, and finally returns to the electronic water pump 010.
Fig. 2 is a flowchart of a defrosting control method of a heat pump air conditioning system according to an embodiment of the present invention. As shown in fig. 2, the defrosting control method for a heat pump air conditioning system according to the embodiment of the present invention includes:
and S1, acquiring the current outdoor temperature under the condition that the heat pump air conditioning system operates in the heating mode.
The current outdoor temperature Tout can be obtained by an outdoor temperature sensor (08) which is arranged far away from the air outlet side of the outdoor side heat exchanger (03).
According to one embodiment of the present invention, acquiring the current outdoor temperature comprises: and acquiring the current outdoor temperature once every second preset time. The second preset time may be set according to actual needs, and may be 10min, for example.
And S2, if the current outdoor temperature is detected to be less than or equal to the first preset temperature threshold, acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe.
The first preset temperature threshold may be set according to actual conditions, and may be, for example, 6 ℃ to 8 ℃, and is preferably set to 7 ℃.
And S3, judging whether the heat pump air conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature.
According to an embodiment of the present invention, the defrosting control method of the heat pump air conditioning system further includes: and if the current outdoor temperature is detected to be greater than the first preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate the heating mode.
Specifically, after the heat pump air conditioning system starts the heating mode for a second preset time, the defrosting mode detection is carried out for the first time. Specifically, the current outdoor temperature Tout is obtained first, and the relationship between the current outdoor temperature Tout and the first preset temperature threshold is determined. When the current outdoor temperature Tout is greater than a first preset temperature threshold value, the air outlet side of the outdoor side heat exchanger does not frost, and the heat pump air-conditioning system is controlled to continue to operate in a heating mode; when the current outdoor temperature Tout is less than or equal to the first preset temperature threshold, the air outlet side of the outdoor side heat exchanger may be frosted. Then, the first probe temperature Tf1 and the second probe temperature Tf2 are acquired, and it is judged whether the heat pump air conditioner system enters the defrosting mode or not based on Tf1 and Tf 2. For example, when Tf2 is much higher than Tf1, the heat pump air conditioning system is controlled to enter defrost mode. And then, acquiring the current outdoor temperature Tout every second preset time, and then detecting the defrosting mode.
It should be noted that, in other embodiments of the present invention, after the heat pump air conditioning system starts the heating mode, the current outdoor temperature Tout may be obtained for the first time exceeding a second preset time, for example, 20min, and then the defrosting mode detection is performed. And then, acquiring the current outdoor temperature Tout every second preset time, and then detecting the defrosting mode.
Therefore, according to the defrosting control method of the heat pump air-conditioning system, whether the heat pump air-conditioning system enters the defrosting mode or not is judged according to the temperature obtained by the temperature sensor which is arranged on the air outlet side of the outdoor heat exchanger and provided with the two temperature probes when heating is carried out, so that the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
Fig. 3 is a flowchart of a defrost control method of a heat pump air conditioning system according to one embodiment of the present invention. This embodiment is a further refinement or optimization of the above-described embodiments.
As shown in fig. 3, the method includes:
and S31, acquiring the current outdoor temperature under the condition that the heat pump air conditioning system operates in the heating mode.
And S32, if the current outdoor temperature is detected to be less than or equal to the first preset temperature threshold, acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe.
It should be noted that, for the explanation of the steps S31 and S32, reference may be made to the relevant parts of the above embodiments, and details are not repeated here.
And S33, calculating the temperature difference of the second probe temperature minus the first probe temperature.
And S34, if the temperature difference is larger than or equal to the second preset temperature threshold, controlling the heat pump air conditioning system to enter a defrosting mode.
The second preset temperature threshold may be set according to actual conditions, and may be, for example, 2 ℃.
And S35, if the temperature difference is smaller than a second preset temperature threshold, controlling the heat pump air-conditioning system to continue to operate the heating mode.
Specifically, under the condition that the heat pump air-conditioning system operates in a heating mode, the current outdoor temperature Tout is obtained in real time, when the current outdoor temperature Tout is larger than a first preset temperature threshold value, it is indicated that the air outlet side of the outdoor heat exchanger does not frost, the heat pump air-conditioning system is controlled to continue to operate in the heating mode at the moment, when the current outdoor temperature Tout is smaller than or equal to the first preset temperature threshold value, it is indicated that the air outlet side of the outdoor heat exchanger may frost, at the moment, the first probe temperature Tf1 and the second probe temperature Tf2 are obtained, the temperature difference delta T obtained by subtracting the first probe temperature from the second probe temperature is calculated, the delta T is Tf2-Tf1, and the size relation between the temperature difference delta T and the second preset temperature is judged. When the temperature difference value delta T is larger than or equal to a second preset temperature, controlling the heat pump air-conditioning system to enter a defrosting mode; and when the temperature difference value delta T is smaller than a second preset temperature, controlling the heat pump air-conditioning system to continuously operate in a heating mode.
Therefore, according to the defrosting control method of the heat pump air-conditioning system, in the heating process, the temperature difference is calculated according to the temperature obtained by the temperature sensor with the two temperature probes arranged on the air outlet side of the outdoor heat exchanger, and whether the heat pump air-conditioning system enters the defrosting mode is judged according to the temperature difference, so that the probability of wrong defrosting can be effectively reduced, the hardware cost is reduced, and the requirement of the whole process on the calculation capacity is low.
Based on the foregoing embodiment, in order to further reduce the probability of false defrosting, after the temperature difference is determined to be greater than or equal to the second preset temperature threshold in step S34, as shown in fig. 4, the method may further include:
and S41, acquiring the pressure difference of the refrigerant flowing out of the outdoor heat exchanger within the first preset time. The first preset time may be set according to an actual situation, and may be 3min, for example.
For example, the pressure value of the refrigerant flowing out of the outdoor heat exchanger can be obtained by a temperature pressure sensor (09) arranged between the other end of the outdoor heat exchanger (03) and a fourth port (4#) of the four-way valve (02).
And S42, if the pressure difference value is larger than or equal to the preset pressure threshold value, controlling the heat pump air conditioning system to enter a defrosting mode.
The preset pressure threshold may be set according to actual needs, and may be 2bar, for example.
And S43, if the pressure difference is smaller than the preset pressure threshold, controlling the heat pump air conditioning system to continue to operate the heating mode.
Specifically, after the temperature difference Δ T is judged to be greater than or equal to the second preset temperature, the pressure value of the refrigerant flowing out of the outdoor heat exchanger is obtained and recorded as P1, the pressure value of the refrigerant flowing out of the outdoor heat exchanger is obtained and recorded as P2 after the first preset time, and the pressure difference Δ P between the two is calculated, wherein Δ P is P2-P1. When the pressure difference value delta P is larger than or equal to a preset pressure threshold value, controlling the heat pump air-conditioning system to enter a defrosting mode; and when the pressure difference value delta P is smaller than a preset pressure threshold value, controlling the heat pump air-conditioning system to continuously operate in a heating mode.
That is to say, after the temperature difference is greater than or equal to the second preset temperature threshold, whether the heat pump air-conditioning system enters the defrosting mode or continues to operate the heating mode is continuously judged according to the pressure difference of the refrigerant flowing out of the outdoor side heat exchanger before and after the first preset time, so that the probability of mistaken defrosting can be further reduced.
Based on the above embodiment, after the heat pump air conditioning system is controlled to enter the defrosting mode for the first preset time (e.g. 5min) in the above steps S34 and S42, the temperature difference Δ T between the current second probe temperature Tf2 and the current first probe temperature Tf1 is obtained again, and when the temperature difference Δ T is smaller than the second preset temperature threshold, the heat pump air conditioning system is controlled to enter the heating mode again.
In order to make the present invention more clear to those skilled in the art, as shown in fig. 5, a defrosting control method for a heat pump air conditioning system according to an embodiment of the present invention includes:
s501, the heat pump air conditioning system is started.
And S502, operating a heating mode.
And S503, detecting a defrosting mode. And detecting the interval, wherein the defrosting mode is detected after the heating mode operates for 20min for the first time, and the defrosting mode is detected every 10min for the subsequent re-detection.
And S504, acquiring the current outdoor temperature Tout, and judging the current outdoor temperature Tout. If Tout is greater than 7 ℃, returning to the step S502; if Tout is less than or equal to 7 ℃, step S505 is executed.
S505, acquiring a current first probe temperature Tf1 of the first temperature probe and a current second probe temperature Tf2 of the second temperature probe, calculating a temperature difference Tf2-Tf1 of subtracting the first probe temperature Tf1 from the second probe temperature Tf2, and judging the temperature difference Tf2-Tf 1. If Tf2-Tf1 is less than 2 ℃, returning to the step S502; if Tf2-Tf1 is greater than or equal to 2 ℃, step S506 is executed.
S506, obtaining a pressure difference value delta P of the refrigerant flowing out of the outdoor heat exchanger for 3min before and after flowing out of the outdoor heat exchanger, and judging the pressure difference value delta P. If the delta P is less than 2bar, returning to the step S502; if Δ P ≧ 2bar, step S507 is executed.
S507, the defrost mode is executed for 5min, and then the process returns to step S505.
Based on the same inventive concept, the embodiment of the application also provides a device corresponding to the method in the embodiment.
Fig. 6 is a block diagram schematically illustrating a defrosting control apparatus of a heat pump air conditioning system according to an embodiment of the present invention. As shown in fig. 6, the defrosting control apparatus 600 of the heat pump air conditioning system according to the embodiment of the present invention includes: a first acquisition module 610, a second acquisition module 620, and a control module 630.
The first obtaining module 610 is configured to obtain a current outdoor temperature in a case where the heat pump air conditioning system operates in a heating mode. The second obtaining module 620 is configured to obtain a current first probe temperature of the first temperature probe and a current second probe temperature of the second temperature probe when it is detected that the current outdoor temperature is less than or equal to the first preset temperature threshold. The control module 630 is configured to determine whether the heat pump air conditioning system enters the defrosting mode according to the first probe temperature and the second probe temperature.
According to an embodiment of the invention, the control module 630 is further configured to: and if the current outdoor temperature is detected to be greater than the first preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate the heating mode.
According to an embodiment of the present invention, the control module 630, when determining whether the heat pump air conditioning system enters the defrosting mode according to the first probe temperature and the second probe temperature, includes: and calculating a temperature difference value obtained by subtracting the first probe temperature from the second probe temperature, controlling the heat pump air-conditioning system to enter a defrosting mode when the temperature difference value is greater than or equal to a second preset temperature threshold value, and controlling the heat pump air-conditioning system to continue to operate in a heating mode when the temperature difference value is less than the second preset temperature threshold value.
According to an embodiment of the invention, the control module 630 is further configured to: and after the temperature difference value is greater than or equal to a second preset temperature threshold value, acquiring a pressure difference value of the refrigerant flowing out of the outdoor side heat exchanger within a first preset time, controlling the heat pump air-conditioning system to enter a defrosting mode when the pressure difference value is greater than or equal to the preset pressure threshold value, and controlling the heat pump air-conditioning system to continue to operate in a heating mode when the pressure difference value is less than the preset pressure threshold value.
According to an embodiment of the present invention, the control module 630 controls the heat pump air conditioning system to enter the heating mode when a temperature difference value obtained by subtracting the current first probe temperature from the current second probe temperature is less than a second preset temperature threshold value after controlling the heat pump air conditioning system to enter the defrosting mode for a first preset time.
According to an embodiment of the present invention, the first obtaining module 610 is specifically configured to: and acquiring the current outdoor temperature once every second preset time.
It should be understood that the above-mentioned apparatus is used for executing the method in the above-mentioned embodiments, and the implementation principle and technical effect of the apparatus are similar to those described in the above-mentioned method, and the working process of the apparatus may refer to the corresponding process in the above-mentioned method, and is not described herein again.
According to the defrosting control device of the heat pump air-conditioning system, the temperature sensor with the first temperature probe and the second temperature probe is arranged on the air outlet side of the outdoor heat exchanger, the current outdoor temperature is obtained through the first obtaining module under the condition that the heat pump air-conditioning system operates in the heating mode, the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe are obtained through the second obtaining module when the current outdoor temperature is detected to be smaller than or equal to the first preset temperature threshold value, and the control module judges whether the heat pump air-conditioning system enters the defrosting mode or not according to the first probe temperature and the second probe temperature, so that the probability of mistaken defrosting can be effectively reduced, and the hardware cost is reduced.
In order to realize the embodiment, the invention further provides a vehicle.
As shown in fig. 7, a vehicle 1000 according to an embodiment of the present invention includes the defrosting control apparatus 600 of the heat pump air conditioning system described above.
According to the vehicle provided by the embodiment of the invention, through the defrosting control device of the heat pump air conditioning system, the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
In order to implement the above embodiments, the present invention further provides an electronic device, which includes: the defrosting control method of the heat pump air conditioning system comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein when the processor executes the program, the defrosting control method of the heat pump air conditioning system is realized.
According to the electronic equipment provided by the embodiment of the invention, by executing the defrosting control method of the heat pump air conditioning system, the probability of wrong defrosting can be effectively reduced, and the hardware cost is reduced.
In order to implement the above embodiments, the present invention also proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described defrosting control method of a heat pump air conditioning system.
The computer-readable storage medium provided by the embodiment of the invention can effectively reduce the probability of wrong defrosting and reduce the hardware cost by executing the defrosting control method of the heat pump air-conditioning system.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a defrosting control method of heat pump air conditioning system, its characterized in that, heat pump air conditioning system includes outdoor side heat exchanger, outdoor temperature sensor, wherein, outdoor temperature sensor includes first temperature probe and second temperature probe, wherein, first temperature probe with second temperature probe sets up outdoor side heat exchanger air-out side, first temperature probe with outdoor side heat exchanger air-out side surface interval first preset distance, second temperature probe with outdoor side heat exchanger air-out side surface interval second preset distance, wherein, second preset distance is greater than first preset distance, the method includes:
under the condition that the heat pump air-conditioning system operates in a heating mode, acquiring the current outdoor temperature;
if the detected current outdoor temperature is smaller than or equal to a first preset temperature threshold value, acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe;
and judging whether the heat pump air-conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature.
2. The defrosting control method of a heat pump air conditioning system according to claim 1, further comprising:
and if the current outdoor temperature is detected to be greater than a first preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate the heating mode.
3. The defrosting control method of the heat pump air conditioning system according to claim 1, wherein the determining whether the heat pump air conditioning system enters the defrosting mode according to the first probe temperature and the second probe temperature includes:
calculating a temperature difference value of subtracting the first probe temperature from the second probe temperature;
if the temperature difference is larger than or equal to a second preset temperature threshold value, controlling the heat pump air-conditioning system to enter a defrosting mode;
and if the temperature difference is smaller than a second preset temperature threshold value, controlling the heat pump air-conditioning system to continue to operate in a heating mode.
4. The defrosting control method of a heat pump air conditioning system of claim 3, further comprising, after the temperature difference is greater than or equal to a second preset temperature threshold:
acquiring a pressure difference value of a refrigerant flowing out of an outdoor side heat exchanger within a first preset time;
if the pressure difference value is larger than or equal to a preset pressure threshold value, controlling the heat pump air-conditioning system to enter a defrosting mode;
and if the pressure difference value is smaller than a preset pressure threshold value, controlling the heat pump air-conditioning system to continuously operate in a heating mode.
5. The defrosting control method of the heat pump air conditioning system according to claim 3 or 4, wherein after the heat pump air conditioning system is controlled to enter the defrosting mode for a first preset time, if a temperature difference obtained by subtracting the current first probe temperature from the current second probe temperature is detected to be less than the second preset temperature threshold value, the heat pump air conditioning system is controlled to enter the heating mode.
6. The defrost control method for a heat pump air conditioning system of claim 1, wherein said obtaining a current outdoor temperature comprises:
and acquiring the current outdoor temperature once every second preset time.
7. The utility model provides a heat pump air conditioning system's defrosting control device, a serial communication port, heat pump air conditioning system includes outdoor side heat exchanger, outdoor temperature sensor, wherein, outdoor temperature sensor includes first temperature probe and second temperature probe, wherein, first temperature probe with second temperature probe sets up outdoor side heat exchanger air-out side, first temperature probe with outdoor side heat exchanger air-out side surface interval first preset distance, second temperature probe with outdoor side heat exchanger air-out side surface interval second preset distance, wherein, second preset distance is greater than first preset distance, the device includes:
the first acquisition module is used for acquiring the current outdoor temperature under the condition that the heat pump air-conditioning system operates in a heating mode;
the second acquisition module is used for acquiring the current first probe temperature of the first temperature probe and the current second probe temperature of the second temperature probe when the current outdoor temperature is detected to be less than or equal to the first preset temperature threshold;
and the control module is used for judging whether the heat pump air-conditioning system enters a defrosting mode or not according to the first probe temperature and the second probe temperature.
8. A vehicle, characterized by comprising: the defrosting control means of the heat pump air conditioning system of claim 7.
9. An electronic device, comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor when executing the program implementing the method of defrost control for a heat pump air conditioning system of any of claims 1-6.
10. A computer-readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements the defrost control method of a heat pump air conditioning system as claimed in any one of claims 1-6.
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| CN112172456B (en) * | 2020-10-19 | 2022-12-27 | 重庆邮电大学 | Defrosting control system and method for heat pump air conditioner of electric automobile |
| CN114812034A (en) * | 2021-01-28 | 2022-07-29 | 合肥华凌股份有限公司 | Refrigeration equipment, control method and device thereof, electronic equipment and storage medium |
| CN116674348A (en) * | 2023-08-02 | 2023-09-01 | 江铃汽车股份有限公司 | Defrosting method and system for external heat exchanger of heat pump air conditioner and computer equipment |
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