CN111076364A - Heat exchanger assembly, air conditioner and air conditioner control method - Google Patents
Heat exchanger assembly, air conditioner and air conditioner control method Download PDFInfo
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- CN111076364A CN111076364A CN201911358663.XA CN201911358663A CN111076364A CN 111076364 A CN111076364 A CN 111076364A CN 201911358663 A CN201911358663 A CN 201911358663A CN 111076364 A CN111076364 A CN 111076364A
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- air conditioner
- heat exchanger
- temperature
- defrosting
- exchanger body
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000010257 thawing Methods 0.000 claims abstract description 82
- 230000008020 evaporation Effects 0.000 claims description 9
- 238000001704 evaporation Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004334 fluoridation Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- 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
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- 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
- F24F11/88—Electrical aspects, e.g. circuits
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a heat exchanger assembly, an air conditioner and an air conditioner control method, wherein the heat exchanger assembly comprises a heat exchanger body and a microwave generator, the microwave generator is arranged around the heat exchanger body, and the microwave generator generates microwaves towards the surface of the heat exchanger body. The heat exchanger assembly, the air conditioner and the air conditioner control method can improve defrosting efficiency of the air conditioner.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a heat exchanger assembly, an air conditioner and an air conditioner control method.
Background
In the prior art, the main defrosting modes of the air conditioner include electric heating defrosting, water defrosting, hot gas bypass defrosting, hot fluoride defrosting and other defrosting schemes, but the electric heating defrosting mode is slow in defrosting, a large amount of heat enters the environment (such as a cold store) where the air conditioner is located in the defrosting process, and electricity is consumed and the defrosting is slow. The overheating of the electric heating tube also has potential safety hazard. The defrosting principle of the thermal fluoride defrosting is that heat on the outdoor side is transferred to the indoor side, and the outdoor heat is used for defrosting. However, if the outdoor temperature is low, the heat is insufficient, and defrosting is difficult.
In summary, the defrosting efficiency of the air conditioner in the prior art is low.
Disclosure of Invention
The embodiment of the invention provides a heat exchanger assembly, an air conditioner and an air conditioner control method, and aims to improve defrosting efficiency of the air conditioner.
In order to achieve the above object, the present invention provides a heat exchanger assembly, including a heat exchanger body and a microwave generator disposed around the heat exchanger body, the microwave generator generating microwaves toward a surface of the heat exchanger body.
Further, the heat exchanger body includes the fin, and the microwave generator is close to the fin setting.
Further, the number of the microwave generators at least comprises two, and the windward side and the leeward side of the heat exchanger body are both provided with the microwave generators.
Furthermore, the heat exchanger assembly also comprises a waveguide tube, the waveguide tube is arranged corresponding to the microwave generator, and the waveguide tube is used for transmitting the microwaves generated by the microwave generator to the surface of the heat exchanger body.
According to another aspect of the present invention, there is provided an air conditioner including the heat exchanger assembly described above.
Further, the air conditioner includes a housing, and the heat exchanger assembly is mounted in the housing.
Further, the air conditioner still includes temperature sensor, and temperature sensor installs between casing and heat exchanger body, and temperature sensor's mounted position corresponds the heat exchanger body setting.
Further, the air conditioner further comprises a humidity sensor, the humidity sensor is installed between the shell and the heat exchanger body, and the installation position of the humidity sensor corresponds to the arrangement of the heat exchanger body.
Furthermore, a defrosting door is arranged on the shell at the position corresponding to the heat exchanger, and the defrosting door has an opening state and a closing state; when the air conditioner is in a refrigeration mode, the defrosting door is in an open state, and air enters the heat exchanger from the outside to exchange heat; when the air conditioner is in the mode of defrosting, the defrosting door is in the closed state, and the casing is internally sealed for defrosting.
Further, the air conditioner is arranged in the refrigeration house.
According to another aspect of the present invention, there is provided an air conditioner control method for the above air conditioner, comprising the steps of: step S1: acquiring an evaporation temperature, an environment temperature of a position where an air conditioner is located, an air supply temperature and an air return temperature; step S2: and when the difference between the evaporation temperature and the ambient temperature is greater than a first preset value and the difference between the supply air temperature and the return air temperature is less than a second preset value, controlling the air conditioner to enter a defrosting mode.
Furthermore, after the air conditioner enters the defrosting mode, the maximum duration time of the defrosting mode is set, and the defrosting mode is immediately exited after the air conditioner enters the defrosting mode for the maximum duration time.
According to another aspect of the present invention, there is provided an air conditioner control method for controlling the above air conditioner, comprising the steps of: acquiring the temperature detected by a temperature sensor; judging whether the temperature detected by the temperature sensor is greater than a preset temperature value or not; if so, controlling the air conditioner to exit the defrosting mode.
According to another aspect of the present invention, there is provided an air conditioner control method for controlling the above air conditioner, comprising the steps of: acquiring humidity detected by a humidity sensor; determining whether the humidity detected by the humidity sensor is less than a predetermined humidity value; if so, controlling the air conditioner to exit the defrosting mode.
When the heat exchanger needs defrosting, the microwave generator generates microwaves, the microwaves are transmitted to the surface of the heat exchanger body, the whole heat exchanger body cannot absorb the microwaves (the fins are aluminum foils, and the heat exchange tubes are copper tubes, so the microwaves cannot be absorbed), and the heat of the microwaves can only be absorbed by frost. The frost absorbs heat to melt and flows out from the bottom of the heat exchanger, and the defrosting process is finished. The invention provides a novel defrosting mode of microwave defrosting, the defrosting efficiency is higher, the problem of slow electric heating defrosting in the prior art is solved, and the problem of small application range of thermal fluoridation in the prior art is also solved.
Drawings
FIG. 1 is a schematic structural view of a heat exchanger assembly according to a first embodiment of the present invention;
fig. 2 is a flowchart illustrating an air conditioning control method according to a third embodiment of the present invention;
fig. 3 is a flowchart illustrating an air conditioning control method according to a fourth embodiment of the present invention;
fig. 4 is a flowchart illustrating an air conditioning control method according to a fifth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.
Referring to fig. 1, according to a first embodiment of the present invention, there is provided a heat exchanger assembly provided in an air conditioner, the heat exchanger assembly including a heat exchanger body 10 and a microwave generator 20, the microwave generator 20 being provided around the heat exchanger body 10, the microwave generator 20 generating microwaves toward a surface of the heat exchanger body 10.
When the heat exchanger needs defrosting, the microwave generator generates microwaves, the microwaves are transmitted to the surface of the heat exchanger body, the whole heat exchanger body cannot absorb the microwaves (the fins are aluminum foils, and the heat exchange tubes are copper tubes, so the microwaves cannot be absorbed), and the heat of the microwaves can only be absorbed by frost. The frost absorbs heat to melt and flows out from the bottom of the heat exchanger, and the defrosting process is finished. The invention provides a novel defrosting mode of microwave defrosting, the defrosting efficiency is higher, the problem of slow electric heating defrosting in the prior art is solved, and the problem of small application range of thermal fluoridation in the prior art is also solved.
Preferably, the heat exchanger body 10 includes fins, and the microwave generator 20 is disposed adjacent to the fins. The location of the microwave generator 20 may allow for faster defrosting.
Referring to the structure of fig. 1, the number of the microwave generators 20 includes at least two, and the microwave generators 20 are disposed on both the windward side and the leeward side of the heat exchanger body 10. The plurality of microwave generators 20 are arranged around the heat exchanger body 10, and at least one microwave generator 20 is arranged at each corner of the heat exchanger body 10. This enables defrosting of the heat exchanger body 10 in all aspects.
The heat exchanger assembly further comprises a waveguide tube disposed corresponding to the microwave generator 20, and the waveguide tube is used for transmitting the microwaves generated by the microwave generator 20 to the surface of the heat exchanger body 10. When the microwave generator is used for defrosting, the electric control system converts 220V alternating current voltage into about 4000V direct current voltage through the high-voltage transformer and the high-voltage rectifier, the direct current voltage is sent to the microwave generator to generate microwaves, and the microwaves are transmitted to the surface of the heat exchanger body 10 through the waveguide tube.
Referring to fig. 1, according to a second embodiment of the present invention, there is provided an air conditioner including the heat exchanger assembly of the above embodiment. The air conditioner includes a housing 30, and a heat exchanger assembly is mounted in the housing 30.
The shell 30 at the corresponding position of the heat exchanger is provided with a defrosting door 40, and the defrosting door 40 has an opening state and a closing state.
When the air conditioner is in a refrigeration mode, the defrosting door 40 is in an open state, and air enters the heat exchanger from the outside to exchange heat; when the air conditioner is in the defrosting mode, the defrosting door 40 is in a closed state, and the inside of the case 30 is closed to defrost.
When in a refrigeration mode, the defrosting door is opened, air enters the heat exchanger for heat exchange, and the whole system is a complete evaporator. When the air conditioner is in a defrosting mode, the defrosting door 40 is in a closed state, and when a microwave generator is used for defrosting, the electric control system converts 220V alternating current voltage into about 4000V direct current voltage through a high-voltage transformer and a high-voltage rectifier, the direct current voltage is sent to the microwave generator to generate microwaves, and the microwaves are transmitted to the surface of the heat exchanger body 10 through the waveguide tube.
In the present embodiment, the air conditioner is provided in a refrigerator. When defrosting, the defrosting door is closed to ensure that the microwave cannot be radiated into the cold storage and the temperature of the cold storage is constant.
In order to ensure the safety and reliability of the air conditioning system, it is preferable that the air conditioner further includes a temperature sensor installed between the casing 30 and the heat exchanger body 10, and an installation position of the temperature sensor is set corresponding to the heat exchanger body 10. The air conditioner further comprises a humidity sensor, the humidity sensor is installed between the shell 30 and the heat exchanger body 10, and the installation position of the humidity sensor corresponds to the heat exchanger body 10.
A temperature sensor and a humidity sensor are added in the air conditioner, and when the temperature sensor detects that the temperature reaches more than 80 ℃, the defrosting mode is exited. When the humidity sensor detects that the humidity is lower than 30%, the defrosting mode is exited. During normal use, the evaporation temperature does not rise to 80 ℃. Once the temperature is higher than 80 ℃, the abnormal use of the unit is represented, the metal plates on the unit have the risk of generating vortex, and the defrosting is stopped immediately. Through adding humidity transducer and temperature sensor, played duplicate protection to guarantee the safety of heat exchanger.
According to a third embodiment of the present invention, there is also provided an air conditioner control method for controlling the air conditioner of the above embodiment, referring to fig. 2, the air conditioner control method including the steps of:
step S1: acquiring an evaporation temperature, an environment temperature of a position where an air conditioner is located, an air supply temperature and an air return temperature;
step S2: and when the difference between the evaporation temperature and the ambient temperature is greater than a first preset value and the difference between the supply air temperature and the return air temperature is less than a second preset value, controlling the air conditioner to enter a defrosting mode.
The air conditioner is arranged in a refrigeration house, when the unit detects that the difference between the evaporation temperature and the ambient temperature (refrigeration house temperature) of the position where the air conditioner is located is more than 20 ℃, the difference between the air supply temperature and the air return temperature is less than 1.5 ℃, and the air conditioner unit enters a defrosting mode.
Preferably, after the air conditioner enters the defrosting mode, the defrosting mode is set for the maximum duration, and the defrosting mode is immediately exited after the air conditioner enters the defrosting mode for the maximum duration. The maximum time can be selected according to actual conditions, and in the embodiment, the maximum time is 6 min. The maximum defrosting time is not allowed to exceed 6min every time, so that overheating defrosting of the unit is prevented.
According to a fourth embodiment of the present invention, referring to fig. 3, the present invention further provides an air conditioner control method, which is used for the air conditioner of the above embodiment, the air conditioner further includes a temperature sensor, the temperature sensor is installed between the shell and the heat exchanger body, and the installation position of the temperature sensor is arranged corresponding to the heat exchanger body. The air conditioner control method comprises the following steps:
s11: acquiring the temperature detected by a temperature sensor;
s12: judging whether the temperature detected by the temperature sensor is greater than a preset temperature value or not;
s13: if so, controlling the air conditioner to exit the defrosting mode.
During normal use, the evaporation temperature does not rise to 80 ℃. Once the temperature is higher than 80 ℃, the abnormal use of the unit is represented, the metal plates on the unit have the risk of generating vortex, and the defrosting is stopped immediately.
According to a fifth embodiment of the present invention, referring to fig. 4, the present invention further provides an air conditioner control method, for controlling the air conditioner of the above embodiment, the air conditioner further includes a humidity sensor, the humidity sensor is installed between the casing and the heat exchanger body, and the installation position of the humidity sensor is arranged corresponding to the heat exchanger body. The air conditioner control method comprises the following steps:
s21: acquiring humidity detected by a humidity sensor;
s22: determining whether the humidity detected by the humidity sensor is less than a predetermined humidity value;
s23: if so, controlling the air conditioner to exit the defrosting mode.
The humidity detected by the humidity sensor is judged, so that double protection is achieved, and the safety of the heat exchanger is guaranteed.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Of course, the above is a preferred embodiment of the present invention. It should be noted that, for a person skilled in the art, several modifications and refinements can be made without departing from the basic principle of the invention, and these modifications and refinements are also considered to be within the protective scope of the invention.
Claims (14)
1. A heat exchanger assembly, characterized by comprising a heat exchanger body (10) and a microwave generator (20), the microwave generator (20) being arranged around the heat exchanger body (10), the microwave generator (20) generating microwaves towards a surface of the heat exchanger body (10).
2. The heat exchanger assembly according to claim 1, wherein the heat exchanger body (10) comprises fins, the microwave generator (20) being arranged adjacent to the fins.
3. The heat exchanger assembly according to claim 1, characterized in that the number of microwave generators (20) comprises at least two, the microwave generators (20) being provided both on the windward side and on the leeward side of the heat exchanger body (10).
4. The heat exchanger assembly according to claim 1, further comprising a waveguide arranged in correspondence with the microwave generator (20), for transmitting microwaves generated by the microwave generator (20) to the surface of the heat exchanger body (10).
5. An air conditioner characterized by comprising the heat exchanger assembly of any one of claims 1 to 4.
6. Air conditioner according to claim 5, characterized in that it comprises a casing (30), the heat exchanger assembly being mounted inside the casing (30).
7. The air conditioner according to claim 6, further comprising a temperature sensor installed between the case (30) and the heat exchanger body (10), the temperature sensor being installed at a position corresponding to the heat exchanger body (10).
8. The air conditioner according to claim 6, further comprising a humidity sensor installed between the housing (30) and the heat exchanger body (10), wherein an installation position of the humidity sensor is disposed corresponding to the heat exchanger body (10).
9. The air conditioner according to claim 6, wherein a defrosting door (40) is opened on the housing (30) corresponding to the heat exchanger, and the defrosting door (40) has an open state and a closed state;
when the air conditioner is in a refrigeration mode, the defrosting door (40) is in an open state, and air enters the heat exchanger from the outside to exchange heat;
when the air conditioner is in a defrosting mode, the defrosting door (40) is in a closed state, and the interior of the shell (30) is closed to defrost.
10. The air conditioner according to claim 5, wherein the air conditioner is provided in a refrigerator.
11. An air conditioner control method for controlling the air conditioner according to any one of claims 5 to 10, characterized by comprising the steps of:
step S1: acquiring an evaporation temperature, an environment temperature of a position where an air conditioner is located, an air supply temperature and an air return temperature;
step S2: and when the difference between the evaporation temperature and the ambient temperature is greater than a first preset value, and the difference between the supply air temperature and the return air temperature is less than a second preset value, controlling the air conditioner to enter a defrosting mode.
12. The air conditioning control method according to claim 11,
after the air conditioner enters the defrosting mode, setting the maximum duration time of the defrosting mode, and immediately exiting the defrosting mode after the air conditioner enters the defrosting mode for the maximum duration time.
13. An air conditioner control method for controlling the air conditioner of claim 7, characterized by comprising the steps of:
acquiring the temperature detected by the temperature sensor;
determining whether the temperature detected by the temperature sensor is greater than a predetermined temperature value;
if so, controlling the air conditioner to exit the defrosting mode.
14. An air conditioner control method for controlling the air conditioner of claim 8, comprising the steps of:
acquiring the humidity detected by the humidity sensor;
determining whether the humidity detected by the humidity sensor is less than a predetermined humidity value;
if so, controlling the air conditioner to exit the defrosting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911358663.XA CN111076364A (en) | 2019-12-25 | 2019-12-25 | Heat exchanger assembly, air conditioner and air conditioner control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911358663.XA CN111076364A (en) | 2019-12-25 | 2019-12-25 | Heat exchanger assembly, air conditioner and air conditioner control method |
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| CN111076364A true CN111076364A (en) | 2020-04-28 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112212468A (en) * | 2020-09-14 | 2021-01-12 | 海信（山东）空调有限公司 | Control method of air conditioner |
| CN112628942A (en) * | 2020-12-11 | 2021-04-09 | 珠海格力电器股份有限公司 | Defrosting control method and device, storage medium and terminal |
| CN113623766A (en) * | 2020-05-08 | 2021-11-09 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
| CN113623763A (en) * | 2020-05-07 | 2021-11-09 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
| CN113623764A (en) * | 2020-05-07 | 2021-11-09 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
| CN113623765A (en) * | 2020-05-07 | 2021-11-09 | 青岛海信日立空调系统有限公司 | Outdoor machine of air conditioner |
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| CN104359277A (en) * | 2014-10-31 | 2015-02-18 | 苏州新亚科技有限公司 | Modularized intelligent air cooler |
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