CN114198865B - Air conditioning unit and control method thereof - Google Patents

Air conditioning unit and control method thereof Download PDF

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Publication number
CN114198865B
CN114198865B CN202111400811.7A CN202111400811A CN114198865B CN 114198865 B CN114198865 B CN 114198865B CN 202111400811 A CN202111400811 A CN 202111400811A CN 114198865 B CN114198865 B CN 114198865B
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CN
China
Prior art keywords
electronic expansion
opening
water receiving
expansion valve
temperatures
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CN202111400811.7A
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Chinese (zh)
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CN114198865A (en
Inventor
王雷
孙辉
赵雷
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Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
Original Assignee
Qingdao Haier Air Conditioner Gen Corp Ltd
Qingdao Haier Air Conditioning Electric Co Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Qingdao Haier Air Conditioning Electric Co Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN202111400811.7A priority Critical patent/CN114198865B/en
Publication of CN114198865A publication Critical patent/CN114198865A/en
Application granted granted Critical
Publication of CN114198865B publication Critical patent/CN114198865B/en
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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
    • F24F11/42—Defrosting; Preventing freezing of outdoor 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F13/222—Means for preventing condensation or evacuating condensate for evacuating condensate
    • 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
    • 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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  • 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 relates to the technical field of air conditioners, in particular to an air conditioner unit and a control method thereof, and aims to solve the problem that an existing air conditioner unit cannot effectively solve the problem of icing on a water pan. The air conditioning unit comprises a water receiving disc and a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a main path and a plurality of heat collecting branches which are communicated with the main path and are arranged in parallel, the plurality of heat collecting branches are arranged on the water receiving disc, a first electronic expansion valve is arranged on the main path, and a second electronic expansion valve is correspondingly arranged on each heat collecting branch; the control method of the invention comprises the following steps: acquiring temperatures of different areas on the water receiving disc; and controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray. According to the control method, the flow of the refrigerant flowing through the first electronic expansion valve and each second electronic expansion valve is regulated, so that heat generated by the heat collection branches can be adapted to defrosting requirements of each area on the water receiving disc.

Description

Air conditioning unit and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, and particularly provides an air conditioner unit and a control method thereof.
Background
When the ambient temperature is lower and the humidity is higher, the heat exchanger of the air conditioning unit is easy to generate frosting, the unit can automatically defrost in order not to influence the normal operation of the unit, and defrosting water can be generated on the heat exchanger of the air conditioning unit under the defrosting working condition of the unit. When passing through the water receiving tray and other parts, the defrosting water is changed from a liquid state to a solid state, and the phenomenon of ice hanging is easy to occur due to ice formation. Meanwhile, when rain and snow fall on the water receiving disc through the fan, ice hanging phenomenon is easy to occur, the appearance attractiveness of the device is affected by ice hanging, and when icing is serious, unit performance is reduced.
The current improvement scheme is mainly through add heating device on the water collector, and the temperature when making defrosting water flow through the water collector is higher than freezing temperature, and then solves the problem of freezing on the water collector, but, current air conditioning unit's water collector manufacturing cost is high, and can not effectively solve the problem of freezing on the water collector, can't carry out regional heating according to the regional difference of water collector, when icing seriously, influences air conditioning unit's normal work's operation to make the water collector undercut easily, reduce life, can't satisfy user's user demand. In summary, the water pan of the existing air conditioning unit is high in manufacturing cost, the problem of icing on the water pan cannot be effectively solved, regional heating cannot be performed according to the difference of the water pan areas, and when icing is serious, unit performance is reduced, so that the use requirements of users cannot be met.
Accordingly, there is a need in the art for a new air conditioning unit and a control method thereof to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to solve the technical problems, namely the problem that the existing air conditioning unit cannot effectively solve the icing problem on the water pan.
In a first aspect, the invention provides a control method of an air conditioning unit, the air conditioning unit comprises a water pan and a refrigerant circulation loop, the refrigerant circulation loop comprises a main path and a plurality of heat collection branches which are communicated with the main path and are arranged in parallel, the plurality of heat collection branches are correspondingly arranged in different areas on the water pan,
the plurality of heat collection branches are arranged on the water receiving disc, the main road is provided with a first electronic expansion valve, and each heat collection branch is correspondingly provided with a second electronic expansion valve;
the control method comprises the following steps:
acquiring temperatures of different areas on the water receiving disc;
and controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray.
In a preferred technical solution of the above control method, the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray specifically includes:
respectively comparing the temperatures of different areas on the water receiving disc with preset temperatures;
and controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison results of the temperatures of different areas on the water receiving tray and the preset temperature.
In the preferred technical solution of the above control method, the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature includes:
and if the temperature of a certain area on the water receiving disc is smaller than the preset temperature, controlling a second electronic expansion valve of the heat collection branch arranged corresponding to the area to be opened.
In the preferred technical solution of the above control method, the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature further includes:
and controlling the opening of the first electronic expansion valve according to the ratio of the number of the areas on the water receiving disc, the temperature of which is smaller than the preset temperature, to the total number of the areas.
In the above preferred technical solution of the control method, the step of controlling the opening degree of the first electronic expansion valve according to the ratio of the number of the areas on the water receiving tray with the temperature smaller than the preset temperature to the total number of the areas specifically includes:
the temperature of each area on the water receiving disc is smaller than the ratio of the number of the preset temperatures to the total number of the areas, and the opening of the first electronic expansion valve is in direct proportion.
In a preferred embodiment of the above control method, the preset temperature is 0 ℃.
In the preferred technical solution of the above control method, the step of comparing the temperatures of different areas on the water pan with the preset temperatures, wherein the number of the heat collecting branches is six, specifically includes:
respectively comparing the temperatures of six areas on the water receiving disc with the preset temperature;
the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature specifically includes:
and controlling the opening degree of the first electronic expansion valve and the opening and closing states of the six second electronic expansion valves according to the comparison results of the temperatures of the six areas on the water receiving disc and the preset temperature.
In the preferred technical solution of the above control method, the step of controlling the opening degree of the first electronic expansion valve and the opening states of the six second electronic expansion valves according to the comparison result of the temperatures of the six areas on the water pan and the preset temperature includes:
and if the temperature of one of the six areas on the water receiving disc is smaller than the preset temperature, controlling a second electronic expansion valve of the heat collection branch arranged corresponding to the area to be opened.
In the preferred technical solution of the above control method, the step of controlling the opening degree of the first electronic expansion valve and the opening states of the six second electronic expansion valves according to the comparison result of the temperatures of the six areas on the water pan and the preset temperature further includes:
if one or two of the temperatures of the six areas on the water receiving disc are smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a first preset opening;
if the temperatures of the six areas on the water receiving disc are three temperatures smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a second preset opening;
if the temperatures of the six areas on the water receiving disc are four and smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a third preset opening;
if the temperatures of the six areas on the water receiving disc are five less than the preset temperature, controlling the opening of the first electronic expansion valve to a fourth preset opening;
if the temperatures of the six areas on the water receiving disc are all smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a fifth preset opening;
the first preset opening is smaller than the second preset opening, smaller than the third preset opening, smaller than the fourth preset opening and smaller than the fifth preset opening.
In another aspect, the present invention further provides an air conditioning unit, where the air conditioning unit includes a controller, and the controller is capable of executing the control method described in any one of the foregoing technical solutions.
Under the condition that the technical scheme is adopted, the air conditioning unit comprises a water receiving disc and a refrigerant circulation loop, wherein the refrigerant circulation loop comprises a main path and a plurality of heat collecting branches which are communicated with the main path and are arranged in parallel, the plurality of heat collecting branches are arranged on the water receiving disc, a first electronic expansion valve is arranged on the main path, and a second electronic expansion valve is correspondingly arranged on each heat collecting branch. According to the invention, through the arrangement of the plurality of heat collection branches, the problem of easiness in icing on the water receiving disc is effectively solved, and through the arrangement of the first electronic expansion valve and the second electronic expansion valve, the heat generated by the plurality of heat collection branches can be adapted to the defrosting requirements of all areas on the water receiving disc, so that the anti-frosting effect is ensured, and meanwhile, the energy consumption is effectively saved. In addition, the control method can control the opening degree of the first electronic expansion valve and the opening and closing states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray so as to correspondingly adjust the flow rate of the refrigerant flowing into each heat collecting branch, and further control the heat generated by each heat collecting branch, so that the flow condition of the refrigerant in each heat collecting branch can be adapted to the frost condition of each area on the water receiving tray, and further the energy consumption can be effectively saved while the frost prevention effect is ensured.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a system diagram of an air conditioning unit of the present invention;
fig. 2 is a schematic view showing a partial structure of an outdoor unit of an air conditioning unit according to the present invention;
FIG. 3 is an exploded view of a part of the structure of the air conditioning unit of the present invention;
FIG. 4 is a cross-sectional view of the water pan of the present invention at the location of the water pan;
FIG. 5 is an enlarged partial view of a cross-sectional view of the water pan of the present invention at the location of the water pan;
FIG. 6 is a schematic view of the structure of the drip tray of the present invention;
FIG. 7 is a schematic view of a water tray support of the present invention;
FIG. 8 is a schematic view of the structure of the water guiding member of the present invention;
FIG. 9 is a flow chart of the main steps of the control method of the present invention;
FIG. 10 is a flowchart of the specific steps of a preferred embodiment of the control method of the present invention;
reference numerals:
11. a body; 12. a heat exchanger; 121. a first drain hole; 13. a water receiving tray; 131. a support member; 1311. a second drain hole; 132. a water guide hole; 133. a connecting plate; 1331. a connection hole; 134. unfilled corners; 135. positioning holes; 14. a water guide member; 141. a horizontal plate; 142. a groove; 15. a water pan support frame; 151. a mounting plate; 1511. a mounting hole; 152. a support beam; 153. a support plate; 16. a gasket; 17. fixing the support structure; 18. a first electronic expansion valve; 19. a liquid separating device; 20. a second electronic expansion valve; 21. a main road; 22. a heat collection branch; 23. a four-way valve; 24. a compressor; 25. a gas-liquid separator; 26. a muffler; 27. an evaporator; 28. an oil tank; 29. an economizer; 30. a first one-way valve; 31. a second one-way valve; 32. a third electronically controlled valve; 33. and a fourth electronically controlled valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can adapt it as desired to suit a particular application.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "middle," "rear," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either a fixed connection or a removable connection, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring first to fig. 1 to 3, fig. 1 to 3 are schematic views of a system of an air conditioning unit according to the present invention, fig. 2 is a schematic view of a portion of an outdoor unit of an air conditioning unit according to the present invention, and fig. 3 is an exploded view of a portion of a structure of an air conditioning unit according to the present invention. As shown in fig. 1 to 3, the air conditioning unit of the present invention includes a water receiving tray 13 and a refrigerant circulation loop, the refrigerant circulation loop includes a main path 21 and a plurality of heat collecting branches 22 connected in parallel and disposed in communication with the main path 21, the plurality of heat collecting branches 22 are disposed on the water receiving tray 13, a first electronic expansion valve 18 is disposed on the main path 21, and a second electronic expansion valve 20 is correspondingly disposed on each heat collecting branch 22.
Specifically, as shown in fig. 1, in the preferred embodiment, the number of the heat collecting branches 22 and the number of the second electronic expansion valves 20 are six, the six heat collecting branches 22 are respectively arranged in six different areas of the water receiving disc 13 so as to heat the different areas on the water receiving disc 13, temperature sensors (not shown in the figure) are respectively arranged in the six areas, a liquid separating device 19 is arranged between the first electronic expansion valve 18 and the second electronic expansion valve 20, the liquid separating device 19 comprises six liquid separating ports, the six liquid separating ports are respectively communicated with one heat collecting branch 22, the temperature sensors can transmit temperature signals of the areas of the water receiving disc 13 where the temperature sensors are arranged to a controller of the air conditioning unit, and the controller can control the opening degree of the first electronic expansion valve 18 according to information of the temperature sensors and can also control the opening state and the opening degree of the second electronic expansion valve 20 so as to heat the different areas on the water receiving disc 13.
It should be noted that the number of the heat collecting branches 22 and the second electronic expansion valves 20 correspondingly arranged in the heat collecting branches and the arrangement mode of the heat collecting branches 22 on the water receiving disc 13 are not limited in the invention, for example, the heat collecting branches 22 can be embedded on the surface of the water receiving disc 13, can be arranged in the water receiving disc 13, can also be a plate arranged on the water receiving disc 13, and can be set by a technician according to practical situations.
In addition, it should be noted that, although the preferred embodiment monitors the frosting of the water tray 13 by the temperature sensor, this is not limitative; for example, the technician can also directly control the first electronic expansion valve 18 and the second electronic expansion valve 20 by manual mode to heat the water receiving tray 13, and for example, can also monitor the frosting condition of the water receiving tray 13 by arranging a camera above the water receiving tray 13, and the technician can set according to the actual condition.
With continued reference to fig. 1, the refrigerant circulation loop is further provided with a four-way valve 23, a compressor 24, a gas-liquid separator 25, an evaporator 27 and an economizer 29, the gas-liquid separator 25 is arranged at the gas inlet of the compressor 24, a silencer 26 is arranged between the economizer 29 and the compressor 24, the refrigerant circulation loop is further provided with a first check valve 30 and a second check valve 31, the first check valve 30 and the second check valve 31 are arranged in parallel, an oil tank 28 is arranged between the second check valve 31 and the evaporator 27, the refrigerant circulation loop is further provided with two third electronic control valves 32 arranged in parallel, and a fourth electronic control valve 33 is arranged between the third electronic control valve 32 and the economizer 29.
Specifically, referring to fig. 4 and 5, fig. 4 is a sectional view of the water pan mounting portion of the present invention, and fig. 5 is a partially enlarged view of the sectional view of the water pan mounting portion of the present invention. As shown in fig. 4 and 5, as a preferable arrangement, the middle portion of the water receiving tray 13 is protruded to form a structure with a high middle and a low circumference so as to better realize drainage, thereby effectively consolidating the defrosting effect. The air conditioning unit further comprises a supporting member 131, and the heat exchanger 12 of the air conditioning unit is connected with the water receiving tray 13 through the supporting member 131. It should be noted that, the specific structure of the supporting member 131 is not limited in the present invention, and the supporting member 131 may be a supporting plate or a boss disposed on the water receiving tray 13, and a technician may set the supporting member according to the actual situation.
Further, in the present preferred embodiment, the heat exchanger 12 is provided with the first drain hole 121, the support member 131 is provided with the second drain hole 1311, and the first drain hole 121 and the second drain hole 1311 are provided in one-to-one correspondence. Specifically, the first and second water discharge holes 121 and 1311 are equal in number, and the axes of the first and second water discharge holes 121 and 1311 are on the same straight line, so that water on the heat exchanger 12 can be discharged to the water receiving tray 13 through the second water discharge hole 1311 after being discharged through the first water discharge hole 121.
In addition, in the preferred embodiment, the water receiving tray 13 is provided with a plurality of water guide holes 132, and the water guide holes 132 are correspondingly arranged below the second water discharge holes 1311, so that water generated in the defrosting process can be discharged in time, and further the defrosting effect is effectively ensured. The water guiding members 14 are disposed below the plurality of water guiding holes 132, and the water guiding members 14 are disposed in an inclined manner, so as to further improve the drainage efficiency. The water on the water receiving tray 13 is discharged into the water guide member 14 through the water guide hole 132, and the water guide member 14 further discharges the water.
Specifically, as a preferable arrangement, the support members 131 are arranged at the left, right, and rear three side positions of the upper surface of the water tray 13 with the direction shown in fig. 4 as a reference direction, and the number of support members 131 on each side is equal, a certain gap exists between every two adjacent support members 131, and the width of each gap is equal. In addition, the air conditioning unit further includes a gasket 16, the gasket 16 being disposed between the support member 131 and the heat exchanger 12; the gasket 16 can alleviate the damage to the supporting member 131 and the water pan 13 caused by the gravity of the heat exchanger 12, so as to play a role of protection. It should be noted that, the specific structures and the number of the supporting members 131, the gaskets 16 and the water guiding holes 132 are not limited in the present invention, and the skilled person can set the present invention according to the actual situation.
Further, it is further preferable that the gasket 16 is provided with water outlet holes (not shown in the drawings), the first water outlet holes 121 and the water outlet holes are arranged in one-to-one correspondence, and the axes of the water outlet holes and the axes of the first water outlet holes 121 and the second water outlet holes 1311 are on the same line so as not to interfere with the water discharging operation of the heat exchanger 12.
Preferably, the air conditioning unit further comprises a water receiving tray supporting frame 15, the water receiving tray supporting frame 15 is connected with the water receiving tray 13, and the shape of the water receiving tray supporting frame 15 is matched with that of the water receiving tray 13. Specifically, referring to fig. 7, fig. 7 is a schematic structural diagram of a water tray support according to the present invention. As shown in fig. 7, the water-receiving tray supporting frame 15 includes two mounting plates 151, two supporting beams 152 and a supporting plate 153, the two supporting beams 152 have the same structure and are arranged in parallel, the supporting plates 153 are arranged at the tops of the two supporting beams 152, the supporting plates 153 can be matched with the protruding parts of the water-receiving tray 13 so as to support the protruding parts of the water-receiving tray 13, prevent the protruding parts from sinking downwards, prolong the service life of the water-receiving tray 13, the mounting plates 151 are arranged at two ends of the supporting beams 152, mounting holes 1511 are arranged on the mounting plates 151, and the mounting holes 1511 are used for fixing the water-receiving tray supporting frame 15.
In addition, it should be noted that the specific structure and the setting position of the water tray support 15 are not limited in the present invention, the water tray support 15 may be further disposed above the water tray 13, for example, the water tray support 15 includes four inclined support rods, the four support rods are connected by a connecting rod, one end of the support rod is connected to the protruding portion of the water tray 13, and the other end of the support rod is connected to the heat exchanger 12, and the upward pulling force of the support rod is used to prevent the protruding portion of the water tray 13 from sinking downward, so as to further increase the service life of the water tray 13.
With continued reference to fig. 4 and 5, the air conditioning unit further includes a fixed support structure 17, where the fixed support structure 17 can support the edge of the water tray 13, and a through hole (not shown in the drawing) is further provided on the fixed support structure 17, and the through hole is matched with the mounting hole 1511 and is fixed by a fastening member, so as to fix the water tray support frame 15. The specific structure of the fixed supporting structure 17 is not limited in the present invention, so long as the structure can meet the requirements of supporting the water-receiving tray 13 and the fixed water-receiving tray supporting frame 15, and the technician can set the structure according to the actual situation.
Referring next to fig. 6, fig. 6 is a schematic structural view of the water pan according to the present invention. As shown in fig. 6, the water pan 13 is further provided with a connecting plate 133, the connecting plate 133 is provided with a connecting hole 1331, the air conditioning unit is correspondingly provided with a matched fixing hole, the connecting hole 1331 and the fixing hole are fixed through a fastening member, the stability of the water pan 13 is further enhanced, the water pan 13 is quadrilateral, the four corner positions of the water pan 13 are further provided with unfilled corners 134, the unfilled corners 134 are arranged so that the shape of the water pan 13 can meet the requirements of the machine body 11 of the air conditioning unit, the installation and the disassembly of the water pan 13 are not hindered, the water pan 13 is further provided with a positioning hole 135, the water pan 13 can be positioned through the positioning hole 135 during installation, and then the water pan 13 is further fixed through the fastening member passing through the positioning hole 135 and a threaded hole matched with the positioning hole 135. In addition, it should be noted that, a technician may select a fixing manner according to the installation condition of the water receiving tray 13, for example, after the water receiving tray is installed and fixed through the positioning hole 135, the connection plate 133 is not fixed; after being fixed by the connecting plate 133, the positioning holes 135 are not fixed, and the technician can set the positioning holes according to the actual situation.
Referring next to fig. 8, fig. 8 is a schematic structural view of the water guiding member of the present invention. As shown in fig. 8, the water guide member 14 includes a horizontal plate 141, and a groove 142 is formed in the middle of the horizontal plate 141 to be recessed downward, and the groove 142 is inclined to accelerate the water discharge from the water guide member 14.
Based on the above structure setting, after detecting the temperatures of different areas of the water pan 13, the temperature sensors arranged in different areas of the water pan 13 transmit signals to the controller of the air conditioning unit, the controller controls the opening degree of the first electronic expansion valve 18 and the opening state and the opening degree of the second electronic expansion valve 20 accordingly, the refrigerant medium is led into the heat collection branch 22, the different areas of the water pan 13 are heated through the heat collection branch 22, the frozen layer on the water pan 13 is melted, and because the water pan 13 is high in middle and low in periphery, the melted water is discharged into the water guide member 14 through the water guide hole 132 and then is discharged through the water guide member 14, the melted water on the heat exchanger 12 is discharged into the water pan 13 through the first water discharge hole 121 and the second water discharge hole 1311, and is further discharged into the water guide member 14 and is discharged through the water guide member 14.
Further, the air conditioning unit of the present invention further includes a controller capable of controlling an operation state of the air conditioning unit, for example, controlling an opening degree of the first electronic expansion valve, controlling an opening and closing state of the second electronic expansion valve, and the like. It can be understood by those skilled in the art that the present invention does not limit the specific structure and model of the controller, and the controller may be an original controller of the air conditioning unit, or a controller separately provided for executing the control method of the present invention, and the skilled person may set the structure and model of the controller according to the actual use requirement.
The air conditioning unit can solve the problem of icing on the water pan 13 based on the structural improvement, and the invention also combines the following control methods to timely and accurately regulate the first electronic expansion valve 18 and the second electronic expansion valve 20, thereby maximally considering the frosting prevention effect and the energy consumption saving effect.
Referring next to fig. 9, fig. 9 is a flow chart of main steps of the control method of the present invention. As shown in fig. 9, based on the air conditioning unit described in the above embodiment, the control method of the present invention mainly includes the following steps:
s1: acquiring temperatures of different areas on the water receiving disc;
s2: and controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray.
Further, in step S1, in a preferred embodiment, the controller is capable of acquiring the temperatures of different areas on the drip tray 13 in real time; in another preferred embodiment, the controller can acquire the temperatures of different areas on the water pan 13 at intervals, and the temperature can be set by a technician according to the actual situation.
In addition, it should be noted that the present invention does not limit the manner of obtaining the temperatures of different areas on the water pan 13, for example, the temperature sensor provided by the air conditioning unit itself may be used to monitor the temperature, or the temperature may be manually monitored and input, so that the technician may set the temperature according to the actual situation.
Further, in step S2, the controller can control the opening degree of the first electronic expansion valve 18 and the open/close states of the plurality of second electronic expansion valves 20 according to the temperatures of different areas on the water pan 13, that is, control all of the plurality of second electronic expansion valves 20 to be opened or control all of the plurality of second electronic expansion valves 20 to be partially opened or control none of the plurality of second electronic expansion valves 20 to be opened. It should be noted that, the controller may control the opening of the first electronic expansion valve 18 according to the ratio of the number of the areas on the water receiving tray 13 that are smaller than the preset temperature to the total number of the areas, and control the opening of the first electronic expansion valve 18 according to the ratio of the number of the areas on the water receiving tray 13 that are smaller than the preset temperature to the total number of the areas, where the opening of the first electronic expansion valve 18 is in direct proportion to the opening of the first electronic expansion valve. The controller may calculate the average temperature of the water tray 13 according to the temperature of each area on the water tray 13, and control the opening of the first electronic expansion valve 18 according to the numerical range of the average temperature, so that the technician may set the opening according to the actual situation, so long as the opening of the first electronic expansion valve 18 is controlled and the opening/closing states of the plurality of second electronic expansion valves 20 are controlled according to the temperatures of different areas on the water tray 13.
Specifically, as a preferable control method, the specific control method corresponding to step S2 is as follows: if the temperature of a certain area on the water receiving disc is smaller than the preset temperature, a second electronic expansion valve of the heat collecting branch arranged corresponding to the area is controlled to be opened; and controlling the opening of the first electronic expansion valve according to the fact that the temperature of each area on the water receiving disc is smaller than the ratio of the number of preset temperatures to the total number of areas, and the ratio of the temperature of each area on the water receiving disc is smaller than the ratio of the number of preset temperatures to the total number of areas and the opening of the first electronic expansion valve is in direct proportion.
Referring next to fig. 10, fig. 10 is a flowchart showing the specific steps of a preferred embodiment of the control method of the present invention. As shown in fig. 10, based on the air conditioning unit described in the above embodiment, a preferred embodiment of the control method of the present invention specifically includes the following steps:
s101: acquiring the temperatures of six areas of the water receiving disc;
s102: respectively comparing the temperatures of six areas on the water receiving disc with preset temperatures;
s103: controlling the opening degree of the first electronic expansion valve and the opening and closing state of the second electronic expansion valve according to the comparison result of the temperatures of the six areas on the water receiving disc and the preset temperature;
s104: if the temperature of a certain area on the water receiving disc is smaller than the preset temperature, controlling a second electronic expansion valve of a heat collecting branch arranged corresponding to the area to be opened;
s105: controlling the opening of the first electronic expansion valve according to the ratio of the number of the areas on the water receiving disc, the temperature of which is smaller than the preset temperature, to the total amount of the areas;
s106: if one or two of the temperatures of the six areas on the water receiving disc are smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a first preset opening;
s107: if the temperatures of the six areas on the water receiving disc are three temperatures smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a second preset opening;
s108: if the temperatures of the six areas on the water receiving disc are four temperatures smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a third preset opening;
s109: if the temperature of the six areas on the water receiving disc is five less than the preset temperature, controlling the opening of the first electronic expansion valve to a fourth preset opening;
s110: and if the temperatures of the six areas on the water receiving disc are all smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a fifth preset opening.
Further, in step S101, in an alternative preferred embodiment, the controller can obtain the temperatures of six areas on the water pan 13 in real time; in another preferred embodiment, the controller can acquire the temperatures of six areas on the water pan 13 at intervals, and the technician can set the temperatures according to the actual situation. It will be appreciated that the division into six areas on the water pan 13 is only a preferred arrangement, and the six areas are further preferably circumferentially distributed, so as to achieve a better area division effect, and the division number of such areas can be set by a technician according to the actual situation.
In addition, it should be noted that the present invention does not limit the manner of obtaining the temperatures of different areas on the water pan 13, for example, the temperature sensor provided by the air conditioning unit itself may be used to monitor the temperature, or the temperature may be manually monitored and input, so that the technician may set the temperature according to the actual situation.
Further, in step S102, the controller may compare the temperatures of the six areas on the water pan 13 with a preset temperature, where the preset temperature is preferably 0 ℃, which is only a preferred setting mode, and a technician may set a specific value of the preset temperature according to the actual use requirement. If the temperature of one or several areas among the six areas of the water pan 13 is less than the preset temperature, it is indicated that the area is at risk of icing or has already been iced.
Further, in step S103, the controller can control the opening degree of the first electronic expansion valve 18 and the open/close states of the plurality of second electronic expansion valves 20 according to the temperatures of the six areas on the water pan 13, that is, control all of the six second electronic expansion valves 20 to be opened or control all of the six second electronic expansion valves 20 to be partially opened or control none of the six second electronic expansion valves 20 to be opened. It should be noted that, the controller may control the opening of the first electronic expansion valve 18 according to the ratio of the number of the six areas on the water receiving disc 13 to the total number of the six areas, where the temperature of the six areas on the water receiving disc 13 is less than the preset temperature, and the ratio of the number of the six areas on the water receiving disc 13 to the total number of the areas is proportional to the opening of the first electronic expansion valve 18. The controller may calculate the average temperature of the water pan 13 according to the temperatures of the six areas on the water pan 13, and control the opening of the first electronic expansion valve 18 according to the numerical range of the average temperature, so that the technician can set the opening according to the actual situation.
Further, in step S104, if the temperature of a certain area on the water pan 13 is less than the preset temperature, the second electronic expansion valve 20 of the heat collecting branch corresponding to the area is controlled to be opened, and after the second electronic expansion valve 20 is opened, the heat collecting branch 22 corresponding to the area is introduced with a refrigerant medium to heat and melt ice or heat and prevent ice formation in the area.
Further, as a preferable arrangement, the first preset opening degree in step S106 is 1/5 of the maximum opening degree, the second preset opening degree in step S107 is 2/5 of the maximum opening degree, the third preset opening degree in step S108 is 3/5 of the maximum opening degree, the fourth preset opening degree in step S109 is 4/5 of the maximum opening degree, and the fifth preset opening degree in step S110 is the maximum opening degree of the first electronic expansion valve 18. It should be noted that the above setting manner is only a preferred setting manner for better realizing precise control, and the present invention does not limit specific values of the first preset opening, the second preset opening, the third preset opening, the fourth preset opening and the fifth preset opening, so long as the specific values of the first preset opening < the second preset opening < the third preset opening < the fourth preset opening < the fifth preset opening can be satisfied, and a technician can set the setting manner according to actual situations.
Based on this setting, the first electronic expansion valve 18 can effectively control the flow of the refrigerant flowing through the heat collecting branch 22, and more effectively save energy consumption under the condition of ensuring that the water receiving tray 13 can be prevented from freezing.
In addition, as a preferable control manner, in the case that the second electronic expansion valve 20 is opened, a period of time may be set to acquire the temperature of the area of the water receiving tray 13 where the second electronic expansion valve 20 is located again, if the acquired temperature is still less than the preset temperature, the second electronic expansion valve 20 is still opened, and the opening of the first electronic expansion valve 18 is increased to accelerate the ice melting; if the re-acquired temperature is greater than the preset temperature, the second electronic expansion valve 20 is closed, and the opening degree of the first electronic expansion valve 18 is adjusted accordingly. In the case where the second electronic expansion valve 20 is opened, the second electronic expansion valve 20 may be directly closed after a period of time, and the opening of the first electronic expansion valve 18 may be adjusted accordingly. When the plurality of second electronic expansion valves 20 are opened, the first electronic expansion valve 18 and the second electronic expansion valve 20 may be directly closed after the water receiving tray 13 is heated for a certain period of time.
In another aspect, the present invention also provides an air conditioning unit, a controller of which is capable of executing the control method described in any one of the above preferred embodiments.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (7)

1. A control method of an air conditioning unit is characterized in that the air conditioning unit comprises a water receiving disc and a refrigerant circulation loop, the refrigerant circulation loop comprises a main path and a plurality of heat collecting branches which are communicated with the main path and are arranged in parallel, the plurality of heat collecting branches are correspondingly arranged in different areas on the water receiving disc,
the plurality of heat collection branches are arranged on the water receiving disc, the main road is provided with a first electronic expansion valve, and each heat collection branch is correspondingly provided with a second electronic expansion valve;
the control method comprises the following steps:
acquiring temperatures of different areas on the water receiving disc;
controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving disc;
the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the temperatures of different areas on the water receiving tray specifically includes:
respectively comparing the temperatures of different areas on the water receiving disc with preset temperatures;
the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature, includes:
if the temperature of a certain area on the water receiving disc is smaller than the preset temperature, a second electronic expansion valve of the heat collecting branch arranged corresponding to the area is controlled to be opened;
the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature further comprises:
and controlling the opening of the first electronic expansion valve according to the ratio of the number of the areas on the water receiving disc, the temperature of which is smaller than the preset temperature, to the total number of the areas.
2. The control method according to claim 1, wherein the step of controlling the opening degree of the first electronic expansion valve according to the ratio of the number of the respective areas on the water receiving tray, which are smaller than the preset temperature, to the total number of the areas, specifically comprises:
the temperature of each area on the water receiving disc is smaller than the ratio of the number of the preset temperatures to the total number of the areas, and the opening of the first electronic expansion valve is in direct proportion.
3. The control method according to claim 1 or 2, characterized in that the preset temperature is 0 ℃.
4. The control method according to claim 1 or 2, wherein the number of the heat collecting branches is six, and the step of comparing the temperatures of different areas on the water receiving tray with the preset temperatures respectively specifically includes:
respectively comparing the temperatures of six areas on the water receiving disc with the preset temperature;
the step of controlling the opening degree of the first electronic expansion valve and the opening states of the plurality of second electronic expansion valves according to the comparison result of the temperatures of the different areas on the water receiving tray and the preset temperature specifically includes:
and controlling the opening degree of the first electronic expansion valve and the opening and closing states of the six second electronic expansion valves according to the comparison results of the temperatures of the six areas on the water receiving disc and the preset temperature.
5. The control method according to claim 4, wherein the step of controlling the opening degree of the first electronic expansion valve and the opening states of the six second electronic expansion valves according to the comparison result of the temperatures of the six areas on the water pan and the preset temperature includes:
and if the temperature of one of the six areas on the water receiving disc is smaller than the preset temperature, controlling a second electronic expansion valve of the heat collection branch arranged corresponding to the area to be opened.
6. The control method according to claim 4, wherein the step of controlling the opening degree of the first electronic expansion valve and the opening states of the six second electronic expansion valves according to the comparison result of the temperatures of the six areas on the water pan and the preset temperature further comprises:
if one or two of the temperatures of the six areas on the water receiving disc are smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a first preset opening;
if the temperatures of the six areas on the water receiving disc are three temperatures smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a second preset opening;
if the temperatures of the six areas on the water receiving disc are four and smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a third preset opening;
if the temperatures of the six areas on the water receiving disc are five less than the preset temperature, controlling the opening of the first electronic expansion valve to a fourth preset opening;
if the temperatures of the six areas on the water receiving disc are all smaller than the preset temperature, controlling the opening of the first electronic expansion valve to a fifth preset opening;
the first preset opening is smaller than the second preset opening, smaller than the third preset opening, smaller than the fourth preset opening and smaller than the fifth preset opening.
7. An air conditioning unit, characterized in that it comprises a controller capable of executing the control method according to any one of claims 1 to 6.
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