CN115507420A - Air conditioner indoor unit, operation control method and device thereof and air conditioner unit - Google Patents

Air conditioner indoor unit, operation control method and device thereof and air conditioner unit Download PDF

Info

Publication number
CN115507420A
CN115507420A CN202110630330.9A CN202110630330A CN115507420A CN 115507420 A CN115507420 A CN 115507420A CN 202110630330 A CN202110630330 A CN 202110630330A CN 115507420 A CN115507420 A CN 115507420A
Authority
CN
China
Prior art keywords
temperature
preset
air
solid
machine room
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110630330.9A
Other languages
Chinese (zh)
Inventor
马臻
滕杰
王菁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dimension Corp
Original Assignee
Dimension Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dimension Corp filed Critical Dimension Corp
Priority to CN202110630330.9A priority Critical patent/CN115507420A/en
Publication of CN115507420A publication Critical patent/CN115507420A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/009—Indoor units, e.g. fan coil units characterised by heating arrangements
    • F24F1/0093—Indoor units, e.g. fan coil units characterised by heating arrangements with additional radiant heat-discharging elements, e.g. electric heaters
    • 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
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/38—Failure diagnosis
    • 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
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/208—Liquid cooling with phase change
    • H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20836—Thermal management, e.g. server temperature control
    • 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)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air-conditioning indoor unit, an operation control method and device thereof and an air-conditioning unit, wherein the air-conditioning indoor unit comprises a body, an air supply fan, an evaporator, a compressor, at least one electric heater, a solid-state relay and a controller; the machine body comprises an air return inlet and an air supply outlet, a ventilation air channel communicated with the air return inlet and the air supply outlet is arranged in the machine body, the evaporator, the at least one electric heater and the air supply fan are positioned on the ventilation air channel, the solid-state relay is electrically connected with the at least one electric heater, the compressor is connected with an outlet of the evaporator, and the controller is in signal connection with the solid-state relay and the compressor; the controller is used for: acquiring the temperature and humidity of a machine room; and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room. The air conditioner indoor unit can realize stepless heating amount regulation and full-load refrigerating amount regulation through reasonable control logic, and reduce the challenges of frequent start and stop and low dehumidification temperature.

Description

Air conditioner indoor unit, operation control method and device thereof and air conditioner unit
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner indoor unit, an operation control method and device thereof and an air conditioner unit.
Background
With the popularization and development of the internet, the demands of the market on the quantity and the quality of the servers are higher and higher, so that the heat density is increased due to the gradual increase of the integration level of internal chips of the servers, the heat dissipation capacity of other supporting facilities of the data center is increased, and the demands on the air conditioners of the machine rooms are very high under the large heat dissipation capacity and heat dissipation density. When the air conditioner of the machine room can meet the heat dissipation requirement, the temperature and the humidity of the whole machine room are stable and uniform in the operation under various working conditions all the year around, the energy consumption is reduced as much as possible, and the PUE of a data center is reduced.
The existing machine room air conditioner has some challenges in adjusting the environment of the machine room, such as frequent start and stop under low load, too low air supply temperature during dehumidification, and too fast independent heating temperature rise. Frequent start-stop can appear in the early stage that the computer lab was established under the low-load, winter that outdoor temperature is lower or the night that the network demand is few, only partial server operation this moment, the refrigeration demand is a lot less than the minimum refrigerating capacity of air conditioner, lead to computer lab temperature reduction air conditioner to stop, along with the interior air temperature rising of the computer lab that continuously dispels the heat in the computer lab, the air conditioner can be opened again, the process of constantly repeating start-up and shut down like this, not only can not satisfy the demand of the interior temperature of accurate control computer lab, and the compressor frequently opens and stops not be favorable to the compressor oil return, probably can make the compressor lack of oil and damage for a long time, and start-stop repeatedly and also can increase the power consumption. Dehumidification air supply temperature is low can appear in spring and summer computer lab humidity higher time computer lab air conditioner start dehumidification control humidity range, if the load very low can lead to the air supply temperature too low simultaneously, is unfavorable for the normal operating of server, can lead to the computer lab temperature fluctuation simultaneously. Heating temperature rise problem alone can appear in the very low district computer lab natural heat dissipation of outdoor temperature and lead to the computer lab in the temperature too low, open the electricity heating this moment and compensate the heat vacancy, the electric heater of adoption is in case the opening temperature can rise rapidly, the computer lab temperature change is unfavorable for server steady operation too fast, and probably trigger the air conditioner and open and increase the power consumption, some producers can adopt the mode that a plurality of electric heaters opened respectively to carry out level control to the heating capacity at present, the computer lab temperature unstability can nevertheless appear in this kind of mode can the slow solution problem.
Disclosure of Invention
The invention provides an air conditioner indoor unit, an operation control method and device thereof and an air conditioner unit.
In order to achieve the purpose, the invention provides the following technical scheme:
an indoor unit of an air conditioner comprises a machine body, an air supply fan, an evaporator, a compressor, at least one electric heater, a solid-state relay and a controller; wherein the content of the first and second substances,
the machine body comprises an air return inlet and an air supply outlet, a ventilation air channel communicated with the air return inlet and the air supply outlet is arranged in the machine body, the evaporator, the at least one electric heater and the air supply fan are positioned on the ventilation air channel, the solid-state relay is electrically connected with the at least one electric heater, the compressor is connected with an outlet of the evaporator, and the controller is in signal connection with the solid-state relay and the compressor;
the controller is configured to:
acquiring the temperature and humidity of a machine room;
and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature and the humidity of the machine room.
In the air conditioner indoor unit provided by the embodiment of the invention, an evaporator, at least one electric heater and an air supply fan are positioned on a ventilation air duct, a solid-state relay is electrically connected with the at least one electric heater, a compressor is connected with an outlet of the evaporator, a controller is in signal connection with the solid-state relay and the compressor, the controller is used for acquiring the temperature of the machine room and the humidity of the machine room, and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room, the controller can send demand signals containing different heating demands (for example, 0-10V) to the solid-state relay, the solid-state relay can change the output voltage according to the demand signals, the electric heater changes the heating quantity along with the change of the working voltage, the demand signals in the process can change between 0-100%, the heating quantity of the motor heater correspondingly changes between 0-100%, air flow is cooled through the evaporator and is heated through electric heating, and finally is sent out of the unit through the air supply fan. When the electric heater operates, the heating capacity can be changed smoothly, so that the temperature of the machine room is changed smoothly. The air-conditioning indoor unit can realize stepless regulation of heating quantity, full-load regulation of refrigerating quantity and reduction of the challenges of frequent start-stop and dehumidification low temperature through reasonable control logic, is favorable for normal operation of a server in a machine room, and reduces misjudgment of air conditioners in the machine room.
Optionally, when the operating state of the compressor and the output voltage of the solid-state relay are controlled according to the temperature of the machine room and the humidity of the machine room, the controller is specifically configured to:
calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and a preset threshold temperature;
and when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, controlling the compressor to be started so as to start the air conditioning unit.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, after the compressor is controlled to be started, the controller is specifically configured to:
when the refrigeration demand of the air conditioner is smaller than a second preset refrigeration demand, controlling the compressor to be closed;
acquiring the return air temperature at the return air inlet;
when the return air temperature is lower than a first preset temperature and the temperature of the machine room is lower than a second preset temperature, controlling the solid-state relay to be started, and controlling the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a third preset temperature or the temperature of the machine room is higher than a fourth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the second preset refrigeration requirement is smaller than the first preset refrigeration requirement, the third preset temperature is larger than the first preset temperature, and the fourth preset temperature is larger than the second preset temperature.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand and the compressor is controlled to be started, the controller is specifically configured to:
acquiring the return air temperature at the return air inlet and the air supply temperature at the air supply inlet;
when the humidity of the machine room is smaller than a first preset humidity, the return air temperature is smaller than a fifth preset temperature, the air supply temperature is smaller than a sixth preset temperature, and the refrigeration demand of the air conditioner is smaller than a third preset refrigeration demand, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration demand of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a seventh preset temperature, or the supply air temperature is higher than an eighth preset temperature, or the refrigeration requirement of the air conditioning unit is higher than a fourth preset refrigeration requirement, controlling a solid-state relay to be closed so as to close the electric heater;
the seventh preset temperature is higher than the fifth preset temperature, the eighth preset temperature is higher than the sixth preset temperature, and the fourth preset refrigeration demand is higher than the third preset refrigeration demand and lower than the first preset refrigeration demand.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand and the compressor is controlled to be started, the controller is specifically configured to:
when the humidity of the machine room is higher than the first preset humidity and the temperature of the machine room is lower than the ninth preset temperature, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the humidity of the machine room is smaller than the second preset humidity or the temperature of the machine room is larger than a tenth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the tenth preset temperature is higher than the ninth preset temperature, and the second preset humidity is lower than the first preset humidity.
Optionally, before controlling the compressor to start, the controller is further configured to:
judging whether the air conditioner has a serious alarm or not;
and if no serious alarm exists, controlling the compressor to be started.
Optionally, the solid state relay comprises a single phase relay, an output of the single phase relay being electrically connected to an input of the at least one electric heater;
the input end of the single-phase relay is electrically connected with a live wire, and the output end of each electric heater is electrically connected with a zero wire, or the input end of the single-phase relay is electrically connected with a live wire, and the output end of each electric heater is electrically connected with another live wire.
Optionally, the solid-state relay comprises a three-phase relay, each output of the three-phase relay being electrically connected to an input of at least one of the electric heaters;
the three input ends of the three-phase relay are respectively electrically connected with three live wires, and the output end of each electric heater is electrically connected with a zero wire, or the input ends of the three-phase relay are respectively electrically connected with three live wires, and the output ends of all the electric heaters are respectively electrically connected with three live wires.
Optionally, the solid state relay is mounted on a metal plate inside the housing.
Optionally, a heat dissipation mechanism is arranged on the solid state relay.
Optionally, the evaporator, the electric heater and the air supply fan are sequentially arranged on the ventilation air duct along the direction of the air return port pointing to the air outlet, or the electric heater, the evaporator and the air supply fan are sequentially arranged.
The invention also provides an air conditioning unit which comprises any air conditioning indoor unit provided in the technical scheme.
The invention also provides an operation control method of the air-conditioning indoor unit, which is applied to any one of the air-conditioning indoor units provided in the technical scheme, and the operation control method comprises the following steps:
acquiring the temperature and humidity of a machine room;
and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature and the humidity of the machine room.
The present invention also provides an operation control device of an indoor unit of an air conditioner, including:
the acquiring unit is used for acquiring the temperature and the humidity of the machine room;
and the control unit is used for controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
Drawings
Fig. 1 is a schematic structural view of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic structural view of another air conditioner indoor unit according to an embodiment of the present invention;
fig. 3 is a control flowchart of a controller in an indoor unit of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a diagram illustrating a relationship between a refrigeration requirement and an electrical heating calculation output according to an embodiment of the present invention;
FIG. 5 is a graph illustrating a relationship between cooling demand and electrical heating calculation output according to another embodiment of the present invention;
FIG. 6 is a diagram illustrating a relationship between an electrical heating calculation output and a control signal according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a relationship between a calculated output of an electrical heater and a control signal according to another embodiment of the present invention;
FIG. 8 is a circuit diagram of a solid state relay and an electric heater according to an embodiment of the present invention;
FIG. 9 is a circuit diagram of an alternative solid state relay and electric heater according to an embodiment of the present invention;
FIG. 10 is a circuit diagram of an alternative solid state relay and electric heater according to an embodiment of the present invention;
FIG. 11 is a circuit diagram of an alternative solid state relay and electric heater according to an embodiment of the present invention;
fig. 12 is a flowchart of an operation control method for an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of an operation control device of an air conditioning indoor unit according to an embodiment of the present invention.
An icon:
1-organism; 2-an air supply fan; 3-an evaporator; 4-an electric heater; 5-a solid state relay; 6-a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides an indoor unit of an air conditioner, including a body 1, an air supply blower 2, an evaporator 3, a compressor, at least one electric heater 4, a solid state relay 5 and a controller 6; wherein the content of the first and second substances,
the air conditioner comprises a machine body 1, an evaporator 3, at least one electric heater 4 and an air supply fan 2, wherein the machine body 1 comprises an air return opening and an air supply opening, an air duct (the direction of an arrow in figures 1 and 2 indicates the flow direction of air flow in the air duct) for communicating the air return opening with the air supply opening is arranged in the machine body 1, the evaporator 3, the at least one electric heater 4 and the air supply fan 2 are arranged on the air duct, a solid-state relay 5 is electrically connected with the at least one electric heater 4, a compressor is connected with an outlet of the evaporator 3, and a controller 6 is in signal connection with the solid-state relay 5 and the compressor;
the controller 6 is configured to:
acquiring the temperature and humidity of a machine room;
and controlling the working state of the compressor and the output voltage of the solid-state relay 5 according to the temperature of the machine room and the humidity of the machine room.
In the air conditioner indoor unit provided by the embodiment of the invention, an evaporator 3, at least one electric heater 4 and an air supply fan 2 are positioned on a ventilation air duct, a solid-state relay 5 is electrically connected with the at least one electric heater 4, a compressor is connected with an outlet of the evaporator 3, a controller 6 is in signal connection with the solid-state relay 5 and the compressor, the controller 6 is used for acquiring the temperature of a machine room and the humidity of the machine room, and controlling the working state of the compressor and the output voltage of the solid-state relay 5 according to the temperature of the machine room and the humidity of the machine room, the controller 6 can send demand signals containing different heating demands (for example, 0-10V) to the solid-state relay 5, the solid-state relay 5 can change the output voltage according to the demand signals, the electric heater 4 can change the heating quantity along with the change of the working voltage, the demand signals in the process can change between 0-100% correspondingly, the heating quantity of the electric heater changes between 0-100%, the direction of arrows in fig. 1 and fig. 2 shows the flow direction of air flow in the ventilation air duct, and the air flow passes through the evaporator 3 and is heated by electric heating and finally is sent out of the unit by the air supply fan 2. When the electric heater 4 is in operation, the heating quantity can be changed smoothly, so that the temperature of the machine room is changed smoothly. The air-conditioning indoor unit can realize stepless regulation of heating quantity, full-load regulation of refrigerating quantity and reduction of the challenges of frequent starting and stopping and low dehumidification temperature through reasonable control logic, is favorable for normal operation of a server in a machine room, and reduces misjudgment of an air conditioner in the machine room.
In the air conditioner indoor unit provided by the embodiment of the invention, the controller can also be in signal connection with the air supply fan, when the air conditioner indoor unit is electrified, the controller can control the air supply fan to be immediately started, and after the compressor is started, the controller can adjust the refrigerating capacity of the air conditioner by controlling the rotating speed of the compressor and the rotating speed of the air supply fan.
In the air conditioning indoor unit provided in the above embodiment of the present invention, a specific control flowchart of the controller 6 may be as shown in fig. 3, so that the following three operation modes of the electric heater 4 in the air conditioning unit can be provided: individual compensation, low load compensation and dehumidification low temperature compensation.
As shown in fig. 3, in one possible embodiment, when controlling the operating state of the compressor and the output voltage of the solid-state relay 5 according to the temperature of the machine room and the humidity of the machine room, the controller 6 may be specifically configured to: calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and the preset threshold temperature; and when the refrigeration demand of the air conditioner is greater than the first preset refrigeration demand A, controlling the compressor to be started so as to start the air conditioning unit.
Specifically, the controller 6 may calculate the refrigeration demand (CFC) corresponding to the air conditioner through a PID algorithm according to a difference between the temperature of the machine room and a preset threshold temperature. When the refrigeration demand CFC of the air conditioner is greater than the first preset refrigeration demand a, the controller 6 may control the air conditioner to start, for example, control the compressor to start and other components in the air conditioner refrigeration system to start.
As illustrated in fig. 3, in a possible embodiment, after controlling the compressor to be on when the refrigeration demand of the air conditioner is greater than the first preset refrigeration demand a, the controller 6 is specifically configured to control the compressor to be off when the refrigeration demand of the air conditioner is less than the second preset refrigeration demand B; acquiring the return air temperature Ta at an air return opening; when the return air temperature Ta is less than a first preset temperature t1 and the temperature Tb of the machine room is less than a second preset temperature t2, controlling the solid relay 5 to be opened, and controlling the output voltage of the solid relay 5 according to the refrigeration requirement of the air conditioner so as to adjust the heating amount of the electric heater 4; when the return air temperature Ta is greater than a third preset temperature t3 or the temperature Tb of the machine room is greater than a fourth preset temperature t4, controlling the solid-state relay 5 to be closed so as to close the electric heater 4; the second preset refrigeration demand B is smaller than the first preset refrigeration demand A, the third preset temperature t3 is greater than the first preset temperature t1, and the fourth preset temperature t4 is greater than the second preset temperature t2.
Specifically, after the air conditioner is started, the machine room is cooled, and when the controller 6 calculates that the refrigeration demand is smaller than the second preset refrigeration demand B, the controller 6 controls the compressor to be turned off. When the state of air conditioner is stable and the compressor still is the closed condition, if when return air temperature Ta is less than first preset temperature t1, and when the temperature Tb of computer lab is less than second preset temperature t2, adopt the mode of independent heating to open electric heater 4, air supply fan 2 normal operating at this moment, controller 6 control solid state relay 5 opens and according to the output voltage of air conditioner refrigeration demand control solid state relay, and then adjust the operating voltage on electric heater 4, with the heating capacity of adjusting electric heater 4, make the heating capacity change along with the change of refrigeration demand, accurate control heating capacity makes the temperature real-time change in the computer lab, help the quick rise back of computer lab temperature, can avoid the computer lab equipment trouble that the computer lab temperature crossed and arouse excessively. After the electric heater 4 heats, when the return air temperature Ta is greater than t3 or the temperature Tb of the machine room is greater than t4, the controller 6 can control the solid-state relay 5 to close, and then close the independent compensation electric heating function of the electric heater 4.
As shown in fig. 3, in a possible embodiment, when controlling the compressor to be on when the refrigeration demand of the air conditioner is greater than the first preset refrigeration demand a, the controller 6 is specifically configured to: acquiring a return air temperature Ta at an air return port and an air supply temperature Tc at an air supply port; when the humidity RHA of the machine room is less than the first preset humidity RH1, the return air temperature Ta is less than the fifth preset temperature t5, the air supply temperature Tc is less than the sixth preset temperature t6 and the refrigeration requirement of the air conditioner is less than the third preset refrigeration requirement C, controlling the solid-state relay 5 to be started, and adjusting the output voltage of the solid-state relay 5 according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater 4; when the return air temperature Ta is greater than a seventh preset temperature t7, or the air supply temperature Tc is greater than an eighth preset temperature t8, or the refrigeration requirement of the air conditioning unit is greater than a fourth preset refrigeration requirement D, controlling the solid-state relay 5 to be closed so as to close the electric heater 4; the seventh preset temperature t7 is greater than the fifth preset temperature t5, the eighth preset temperature t8 is greater than the sixth preset temperature t6, and the fourth preset refrigeration demand D is greater than the third preset refrigeration demand C and less than the first preset refrigeration demand a.
Specifically, when the controller 6 calculates that the refrigeration demand is greater than the first preset refrigeration demand a, the condition that the compressor is opened is reached, and the controller 6 controls the compressor to be opened so as to open the refrigeration system of the air conditioner and adjust and control the temperature Tb of the machine room. After the compressor is started, when the humidity RHA of the machine room is smaller than RH1, the air conditioning unit does not need to start the dehumidification function, under the condition, when the return air temperature Ta is smaller than a fifth preset temperature t5, the air supply temperature Tc is smaller than a sixth preset temperature t6 and the refrigeration demand of the air conditioner is smaller than a third preset refrigeration demand C, the air conditioning system has the low-load compensation demand, the controller 6 controls the solid relay 5 to start and adjusts the output voltage of the solid relay 5 according to the refrigeration demand of the machine room so as to adjust the heating quantity of the electric heater 4, and the low-load compensation electric heating is started. At this moment, the air supply fan 2 normally operates, the electric heater 4 is started, and after the air in the ventilation air channel is heated by the electric heater 4, the air is sent out of the air conditioning unit by the air supply fan 2, so that the air temperature in the machine room is kept stable, and the compressor and the air supply fan 2 normally operate. The heating mode can keep the air supply temperature slowly changing during heating, the air temperature fluctuation in the machine room is small, the compressor is prevented from being started and stopped frequently under the condition of low load of the machine room, the compressor is protected better, and the server is protected better. And when the return air temperature Ta is greater than the seventh preset temperature t7 or the supply air temperature is greater than the eighth preset temperature t8 or the refrigeration requirement of the air conditioner is greater than the fourth preset refrigeration requirement D, the controller 6 can control the solid-state relay 5 to be turned off, so as to turn off the low-load compensation electric heating function of the electric heater 4.
As shown in fig. 3, in one possible embodiment, when controlling the compressor to be on when the refrigeration demand of the air conditioner is greater than the first preset refrigeration demand a, the controller 6 is specifically configured to: when the humidity RHA of the machine room is greater than the first preset humidity RH1 and the temperature Tb of the machine room is less than the ninth preset temperature t9, controlling the solid relay 5 to be opened, and adjusting the output voltage of the solid relay 5 according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater 4; when the humidity RHA of the machine room is less than the second preset humidity RH2 or the temperature Tb of the machine room is greater than the tenth preset temperature t10, controlling the solid-state relay 5 to be closed so as to close the electric heater 4; the tenth preset temperature t10 is higher than the ninth preset temperature t9, and the second preset humidity RH2 is lower than the first preset humidity RH1.
Specifically, when the controller 6 calculates that the refrigeration demand is greater than the first preset refrigeration demand a, the condition that the compressor is started is reached, and the controller 6 controls the compressor to be started so as to start the refrigeration system of the air conditioner and adjust and control the temperature of the machine room. After the compressor is opened, when the humidity RHA of computer lab is greater than first predetermined humidity RH1, the dehumidification function need be opened to the air conditioning unit, under this condition, when the unit gets into dehumidification mode, can adjust the refrigerating system of air conditioner and make the evaporating temperature of air reduce, consequently leads to the computer lab actual temperature to hang down excessively easily. In order to avoid the phenomenon that the temperature of the machine room is too low, the system is ensured to have the function of meeting the dehumidification requirement, and the dehumidification low-temperature compensation function can be realized by heating the electric heater 4. For example, when humidity RHa in the computer lab is greater than first humidity RH1 of predetermineeing, and when temperature Tb of computer lab is less than ninth temperature t9 of predetermineeing, controller 6 control relay opens and adjusts solid-state relay 5's output voltage according to the refrigeration demand of computer lab, with the heating capacity of adjusting electric heater 4, electric heater 4 is opened to the mode of adopting dehumidification low temperature compensation, electric heater 4 cooperates dehumidification compensation operation dynamic adjustment, the temperature that can guarantee the computer lab and the humidity of computer lab are all in reliable range, avoid the compressor to lead to shutting down because of the computer lab temperature is low excessively, maintain dynamic balance. And when the humidity of the machine room is less than the second preset humidity or the temperature of the machine room is greater than the tenth preset temperature, the controller 6 can control the solid-state relay 5 to be closed, so that the dehumidification low-temperature compensation electric heating function of the motor heater is closed.
As shown in fig. 3, in a possible embodiment, before controlling the compressor to be turned on, the controller 6 is further configured to: judging whether the air conditioner has a serious alarm or not; if no serious alarm exists, the compressor is controlled to be started, and the normal operation of the air conditioning system can be ensured; if the system has a serious alarm, the compressor cannot be controlled to be started, so that the air conditioner unit is prevented from being damaged more, the information of whether the system has the serious alarm is obtained again until the controller obtains the signal of no serious alarm of the system, and then the compressor is controlled to be started. The faults of the air conditioning system can be classified according to the fault degree of the air conditioning unit, and the faults of different levels can be judged by different alarm signals, for example, the fault level alarm of the air conditioning unit can be divided into a low-level alarm, a middle-level alarm, a high-level alarm, a serious alarm and the like from low to high, the alarm levels corresponding to the air conditioning faults are not specifically limited, and classification can be selected according to actual conditions.
The superposition of the three operation modes of the electric heater 4 can ensure the full-range adjustment of the temperature and the humidity of the air conditioner in the machine room, avoid the frequent start and stop of the air conditioner compressor equipment and prolong the service life. Specifically, the electric heater changes the heating quantity along with the change of the circuit voltage, the control signal can change in a stepless way between 0% and 100%, and the heating quantity can change in a stepless way between 0% and 100%, so that the heating quantity is accurately controlled, the room temperature change is smooth when the heating is started, the normal operation of a server is facilitated, and the misjudgment of the air conditioner of the room is reduced; and the compressor has the lowest value of refrigerating capacity due to the limitation of the lowest rotating speed, when the load of a machine room is lower than the lowest refrigerating capacity of the air conditioner, the heater is started, the heating quantity is controlled in real time, the difference value between the load and the lowest refrigerating capacity is supplemented, and finally the continuous operation of the equivalent refrigerating capacity in the full refrigerating range of 0-100% is realized.
Specifically, in the specific process that the controller 6 controls the relay to be turned on and adjusts the output voltage of the solid-state relay 5 according to the refrigeration requirement of the machine room, after the electric heater 4 is turned on, the controller 6 can calculate the refrigeration requirement CFC of the air conditioner according to an algorithm, wherein the calculation mode of the refrigeration requirement CFC can be a PID algorithm, and can also be PI adjustment or P adjustment, and the like, and the controller 6 correspondingly issues a direct-current voltage control signal within the range of 0-10V to the solid-state relay 5, so that the electric heater 4 can reach the heating amount within the range of 0-100%. As shown in fig. 4, when the cooling demand of the air conditioner is n2, the electric heater 4 is turned on, and the electric heating calculation output m1 is at this time; when the refrigeration requirement of the air conditioner is n1, the maximum calculation output m2 of the electric heating is obtained at the moment; when the refrigeration requirement of the air conditioner is between n1 and n2, the electric heating calculation output is linearly corresponding according to the graph 4; when the refrigerating requirement of the air conditioner is between n2 and n3, the heating requirement is small, the electric heating calculation output maintains m1 until the refrigerating requirement reaches n3, and the electric heating calculation output is 0. As shown in fig. 5, the calculation relationship between the calculated output of the electric heating and the cooling demand may be stepped or otherwise, and is not limited herein.
The number of the electric heaters 4 may be one or more, and may be selected according to the maximum heating demand and the space limitation of the indoor unit of the air conditioner. The electric heater 4 may be in various forms, and may be a PTC electric heater 4 or an electric heating tube with a constant resistance, which is not limited herein.
Because the voltage regulation characteristic of the solid-state relay 5 and the power characteristic of the PCT electric heater 4, the applied control signal and the output power are not linearly related, and the fluctuation of the power in the middle section signal is large, the corresponding relation between the electric heating calculation output and the control signal issued by the controller 6 is shown in figure 6, when the control signal is between Y1 and Y2 in the middle section, the slope of the corresponding straight line is minimum, and the adjustable power range is relatively large. In the whole adjusting process, the ambient temperature can change in real time, so that the refrigeration requirement also changes in real time, the controller 6 sends different control signals to provide corresponding power output, the dynamic balance of the heating temperature close to the set temperature is achieved, stepless adjustment is achieved, and the temperature change of a machine room in the whole adjusting process is smooth.
When the electric heater 4 is an electric heating tube with a constant resistance, the control signal and the motor heat calculation output are in a linear relationship, as shown in fig. 7.
It should be noted that specific values of the first to tenth preset temperatures t1 to t10, the first preset humidity RH1, the second preset humidity RH2, and the first to fourth preset refrigeration demands a to D may be determined according to actual demands, and are not limited herein.
The temperature of above-mentioned return air temperature, air supply temperature, computer lab can obtain through temperature sensor, for example, the return air temperature is obtained through the first temperature sensor collection that sets up in return air mouth department, and air supply temperature obtains through the second temperature sensor collection that sets up in air supply mouth department, and the temperature of computer lab obtains through the third temperature sensor collection that sets up in the computer lab. Specifically, the first temperature sensor and the second temperature sensor may be temperature sensors carried by the air conditioner indoor unit itself, or may also be temperature sensors that are not individually set in the air conditioner indoor unit; the temperature of the machine room acquired by the third temperature sensor can be the temperature of air near the air return inlet in the machine room, the temperature of air near the air outlet in the machine room, or the temperature of air at a certain position far away from the indoor unit of the air conditioner in the machine room. The controller 6 is in signal connection with the first sensor, the second sensor and the third sensor to acquire the air supply temperature, the air return temperature and the temperature of the machine room.
The humidity of the machine room can be acquired through the humidity sensor, and the humidity of the machine room can be the humidity of air close to the air return opening in the machine room, the humidity of air close to the air supply opening in the machine room, or the humidity of air far away from a certain position of the indoor unit of the air conditioner in the machine room. The controller 6 is in signal connection with the humidity sensor to acquire the humidity of the machine room.
Specifically, the controller 6 may be a main control board in an indoor unit of an air conditioner.
In the indoor unit of an air conditioner according to the embodiment of the present invention, as shown in fig. 8 and 9, the solid-state relay 5 may be a single-phase relay, and an output terminal of the single-phase relay is electrically connected to an input terminal of the at least one electric heater 4;
specifically, as shown in fig. 8, the input end of the single-phase relay is electrically connected to a live line L, and the output end of each electric heater 4 is electrically connected to a neutral line N; alternatively, as shown in fig. 9, the input terminal of the single-phase relay is electrically connected to one live line L1, and the output terminal of each electric heater 4 is electrically connected to the other live line L2.
In the air-conditioning indoor unit provided in the embodiment of the present invention, as shown in fig. 10 and 11, the solid-state relay 5 may also be a three-phase relay, and each output terminal of the three-phase relay is electrically connected to an input terminal of at least one electric heater 4;
specifically, as shown in fig. 10, three input ends of the three-phase relay are electrically connected with three live wires L1, L2, and L3, respectively, and an output end of each electric heater 4 is electrically connected with one neutral wire N; alternatively, as shown in fig. 11, the input terminals of the three-phase relay are electrically connected to three live lines L1, L2, and L3, respectively, and the output terminals of all the electric heaters 4 are electrically connected to three live lines L1, L2, and L3, respectively.
In the above air conditioner indoor unit, the specific type of the solid-state relay 5 can be selected according to the number of the electric heaters 4 and the installation space, and is not limited herein.
Specifically, the manner of changing the voltage by the solid-state relay 5 may be various, and may be phase angle control, that is, changing the conduction area of each sine wave; half-wave control can be adopted, namely the number of complete sine waves which are conducted in each second is changed; it may be chopper control that changes the number of times the solid-state relay 5 is turned on and off per second. The signal sent by the controller 6 to the solid-state relay 5 can be various, such as 4-32V, 4-20mA, etc., and is not limited herein, depending on the actual situation.
In the air-conditioning indoor unit provided by the embodiment of the invention, the solid-state relay 5 can be installed on the metal plate inside the machine body 1, so that the space can be saved, and the convection of air flow and the heat conduction and the heat dissipation of the metal plate can be utilized.
Specifically, the solid-state relay 5 may further be provided with a heat dissipation mechanism, for example, the heat dissipation mechanism may be a heat dissipation fin added at the rear of the solid-state relay 5, or a heat dissipation fin added at a side of the solid-state relay 5, and the heat dissipation mechanism can dissipate heat of the solid-state relay 5 when a load is large or heat dissipation is poor.
In the indoor unit of an air conditioner provided by the embodiment of the invention, the direction pointing to the air outlet along the air return port is arranged on the ventilation air duct, as shown in fig. 1, the evaporator 3, the electric heater 4 and the air supply fan 2 are sequentially arranged, that is, the electric heater 4 is arranged on the air outlet side of the indoor unit of the air conditioner and is positioned between the evaporator 3 and the air supply fan 2; or, as shown in fig. 2, the electric heater 4, the evaporator 3 and the air supply fan 2 are arranged in sequence, that is, the electric heater 4 is installed on the air inlet side of the indoor unit of the air conditioner and is located between the air return inlet and the evaporator 3.
Based on the same inventive concept, the embodiment of the invention also provides an air conditioning unit, which comprises any air conditioning indoor unit provided in the technical scheme. Specifically, the air conditioning unit may include an indoor unit and an outdoor unit, the outdoor unit may include a condenser, a fan and a throttle valve corresponding to the condenser, and the like, the evaporator, the compressor, the condenser and the throttle valve are sequentially loop-connected to form a refrigeration system of the air conditioning unit, and the adjustment of the cooling capacity may be achieved by controlling the fan, the compressor and the air supply fan corresponding to the condenser.
Based on the same inventive concept, an embodiment of the present invention further provides an operation control method for an air conditioning indoor unit, which is applied to any one of the air conditioning indoor units provided in the foregoing technical solutions, where the operation control method, as shown in fig. 12, includes:
s1201: acquiring the temperature and humidity of a machine room;
s1201: and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
According to the operation control method of the air-conditioning indoor unit, the temperature of the machine room and the humidity of the machine room are firstly obtained, then the working state of the compressor and the output voltage of the solid-state relay are controlled according to the temperature of the machine room and the humidity of the machine room, and the challenges that the heating quantity can be adjusted in a stepless mode, the refrigerating capacity can be adjusted in a full-load mode, and frequent starting and stopping and low dehumidification temperature can be reduced can be achieved through reasonable control logic.
Optionally, the controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room includes:
calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and a preset threshold temperature;
and when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, controlling the compressor to be started so as to start the air conditioning unit.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, after controlling the compressor to be started, the method includes:
when the refrigeration demand of the air conditioner is smaller than a second preset refrigeration demand, controlling the compressor to be closed;
acquiring the return air temperature at the return air inlet;
when the return air temperature is lower than a first preset temperature and the temperature of the machine room is lower than a second preset temperature, controlling the solid-state relay to be started, and controlling the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a third preset temperature or the temperature of the machine room is higher than a fourth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the second preset refrigeration requirement is smaller than the first preset refrigeration requirement, the third preset temperature is larger than the first preset temperature, and the fourth preset temperature is larger than the second preset temperature.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, when controlling the compressor to be started, the method includes:
acquiring the return air temperature at the return air inlet and the air supply temperature at the air supply inlet;
when the humidity of the machine room is smaller than a first preset humidity, the return air temperature is smaller than a fifth preset temperature, the air supply temperature is smaller than a sixth preset temperature, and the refrigeration demand of the air conditioner is smaller than a third preset refrigeration demand, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration demand of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a seventh preset temperature, or the supply air temperature is higher than an eighth preset temperature, or the refrigeration requirement of the air conditioning unit is higher than a fourth preset refrigeration requirement, controlling a solid-state relay to be closed so as to close the electric heater;
the seventh preset temperature is higher than the fifth preset temperature, the eighth preset temperature is higher than the sixth preset temperature, and the fourth preset refrigeration requirement is higher than the third preset refrigeration requirement and lower than the first preset refrigeration requirement.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, when controlling the compressor to be started, the method includes:
when the humidity of the machine room is higher than the first preset humidity and the temperature of the machine room is lower than the ninth preset temperature, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the humidity of the machine room is smaller than the second preset humidity or the temperature of the machine room is larger than a tenth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the tenth preset temperature is higher than the ninth preset temperature, and the second preset humidity is lower than the first preset humidity.
Optionally, before controlling the compressor to start, the method includes:
judging whether the air conditioner has a serious alarm or not;
and if no serious alarm exists, controlling the compressor to be started.
Based on the same inventive concept, an embodiment of the present invention further provides an operation control device for an indoor unit of an air conditioner, as shown in fig. 13, including:
an obtaining unit 100, configured to obtain a temperature of a machine room and a humidity of the machine room;
and the control unit 200 is used for controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
In the operation control device of the indoor unit of the air conditioner, provided by the embodiment of the invention, the acquisition unit 100 is used for acquiring the temperature and the humidity of the machine room, and the control unit 200 is used for controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature and the humidity of the machine room, so that the stepless regulation of the heating capacity and the full-load regulation of the refrigerating capacity can be realized through reasonable control logic, and the problems of frequent start-stop and dehumidification low temperature fighting can be reduced.
Optionally, the operating state of the compressor and the output voltage of the solid-state relay are controlled according to the temperature of the machine room and the humidity of the machine room, and the control unit 200 is specifically configured to:
calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and a preset threshold temperature;
and when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, controlling the compressor to be started so as to start the air conditioning unit.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, after the compressor is controlled to be started,
the control unit 200 is specifically configured to:
when the refrigeration demand of the air conditioner is smaller than a second preset refrigeration demand, controlling the compressor to be closed;
the obtaining unit 100 is further configured to obtain a return air temperature at the return air inlet;
the control unit 200 is further specifically configured to:
when the return air temperature is lower than a first preset temperature and the temperature of the machine room is lower than a second preset temperature, controlling the solid-state relay to be started, and controlling the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a third preset temperature or the temperature of the machine room is higher than a fourth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the second preset refrigeration requirement is smaller than the first preset refrigeration requirement, the third preset temperature is larger than the first preset temperature, and the fourth preset temperature is larger than the second preset temperature.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, the compressor is controlled to be started,
an acquiring unit 100 configured to acquire a return air temperature at the return air inlet and a supply air temperature at the supply air outlet;
the control unit 200 is specifically configured to:
when the humidity of the machine room is smaller than a first preset humidity, the return air temperature is smaller than a fifth preset temperature, the air supply temperature is smaller than a sixth preset temperature, and the refrigeration requirement of the air conditioner is smaller than a third preset refrigeration requirement, the solid-state relay is controlled to be started, and the output voltage of the solid-state relay is adjusted according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a seventh preset temperature, or the supply air temperature is higher than an eighth preset temperature, or the refrigeration requirement of the air conditioning unit is higher than a fourth preset refrigeration requirement, controlling a solid-state relay to be closed so as to close the electric heater;
the seventh preset temperature is higher than the fifth preset temperature, the eighth preset temperature is higher than the sixth preset temperature, and the fourth preset refrigeration demand is higher than the third preset refrigeration demand and lower than the first preset refrigeration demand.
Optionally, when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, and the compressor is controlled to be turned on, the control unit 200 is specifically configured to:
when the humidity of the machine room is higher than the first preset humidity and the temperature of the machine room is lower than the ninth preset temperature, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the humidity of the machine room is smaller than the second preset humidity or the temperature of the machine room is larger than a tenth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the tenth preset temperature is higher than the ninth preset temperature, and the second preset humidity is lower than the first preset humidity.
Optionally, before controlling the compressor to be turned on, the control unit 200 is further configured to:
judging whether the air conditioner has a serious alarm or not;
and if no serious alarm exists, controlling the compressor to be started.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims (19)

1. An indoor unit of an air conditioner is characterized by comprising a machine body, an air supply fan, an evaporator, a compressor, at least one electric heater, a solid-state relay and a controller; wherein, the first and the second end of the pipe are connected with each other,
the machine body comprises an air return inlet and an air supply outlet, a ventilation air channel communicated with the air return inlet and the air supply outlet is arranged in the machine body, the evaporator, the at least one electric heater and the air supply fan are positioned on the ventilation air channel, the solid-state relay is electrically connected with the at least one electric heater, the compressor is connected with an outlet of the evaporator, and the controller is in signal connection with the solid-state relay and the compressor;
the controller is configured to:
acquiring the temperature and humidity of a machine room;
and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
2. An air conditioning indoor unit according to claim 1, wherein when the operating state of the compressor and the output voltage of the solid-state relay are controlled according to the temperature of the machine room and the humidity of the machine room, the controller is specifically configured to:
calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and a preset threshold temperature;
and when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, controlling the compressor to be started so as to start the air conditioning unit.
3. The indoor unit of claim 2, wherein after controlling the compressor to turn on when the cooling demand of the air conditioner is greater than a first preset cooling demand, the controller is specifically configured to:
when the refrigeration demand of the air conditioner is smaller than a second preset refrigeration demand, controlling the compressor to be closed;
acquiring the return air temperature at the return air inlet;
when the return air temperature is lower than a first preset temperature and the temperature of the machine room is lower than a second preset temperature, controlling the solid-state relay to be started, and controlling the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a third preset temperature or the temperature of the machine room is higher than a fourth preset temperature, the solid-state relay is controlled to be closed so as to close the electric heater;
the second preset refrigeration requirement is smaller than the first preset refrigeration requirement, the third preset temperature is larger than the first preset temperature, and the fourth preset temperature is larger than the second preset temperature.
4. An indoor unit of an air conditioner as claimed in claim 2, wherein when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, the controller is configured to, when the compressor is controlled to be turned on:
acquiring the return air temperature at the return air inlet and the air supply temperature at the air supply inlet;
when the humidity of the machine room is smaller than a first preset humidity, the return air temperature is smaller than a fifth preset temperature, the air supply temperature is smaller than a sixth preset temperature, and the refrigeration demand of the air conditioner is smaller than a third preset refrigeration demand, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration demand of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a seventh preset temperature, or the supply air temperature is higher than an eighth preset temperature, or the refrigeration requirement of the air conditioning unit is higher than a fourth preset refrigeration requirement, controlling a solid-state relay to be closed so as to close the electric heater;
the seventh preset temperature is higher than the fifth preset temperature, the eighth preset temperature is higher than the sixth preset temperature, and the fourth preset refrigeration demand is higher than the third preset refrigeration demand and lower than the first preset refrigeration demand.
5. The indoor unit of claim 2, wherein when the compressor is controlled to be turned on when the cooling demand of the air conditioner is greater than a first preset cooling demand, the controller is specifically configured to:
when the humidity of the machine room is higher than the first preset humidity and the temperature of the machine room is lower than the ninth preset temperature, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the humidity of the machine room is smaller than the second preset humidity or the temperature of the machine room is larger than a tenth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the tenth preset temperature is higher than the ninth preset temperature, and the second preset humidity is lower than the first preset humidity.
6. The indoor unit of claim 2, wherein before controlling the compressor to be turned on, the controller is further configured to:
judging whether the air conditioner has a serious alarm or not;
and if no serious alarm exists, controlling the compressor to be started.
7. An indoor unit of an air conditioner according to claim 1, wherein the solid-state relay includes a single-phase relay, an output terminal of the single-phase relay being electrically connected to an input terminal of the at least one electric heater;
the input end of the single-phase relay is electrically connected with a live wire, and the output end of each electric heater is electrically connected with a zero wire, or the input end of the single-phase relay is electrically connected with a live wire, and the output end of each electric heater is electrically connected with another live wire.
8. An indoor unit of an air conditioner according to claim 1, wherein the solid-state relay includes a three-phase relay, each output terminal of the three-phase relay being electrically connected to an input terminal of at least one of the electric heaters;
the three input ends of the three-phase relay are respectively electrically connected with three live wires, and the output end of each electric heater is electrically connected with a zero wire, or the input ends of the three-phase relay are respectively electrically connected with three live wires, and the output ends of all the electric heaters are respectively electrically connected with three live wires.
9. An indoor unit of an air conditioner according to claim 1, wherein the solid-state relay is mounted on a metal plate inside the machine body.
10. An indoor unit of an air conditioner according to claim 9, wherein a heat radiating mechanism is provided on the solid-state relay.
11. The indoor unit of claim 1, wherein the evaporator, the electric heater, and the blower fan are disposed in this order along a direction in which the return air inlet is directed to the air outlet on the ventilation air duct, or the electric heater, the evaporator, and the blower fan are disposed in this order.
12. Air conditioning assembly, characterized in that it comprises an air conditioning indoor unit according to any one of claims 1 to 11.
13. An operation control method of an indoor unit of an air conditioner, applied to the indoor unit of an air conditioner according to any one of claims 1 to 11, the operation control method comprising:
acquiring the temperature and humidity of a machine room;
and controlling the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
14. The operation control method according to claim 13, wherein the controlling of the operating state of the compressor and the output voltage of the solid-state relay based on the temperature of the machine room and the humidity of the machine room comprises:
calculating the refrigeration requirement of the air conditioner according to the temperature of the machine room and a preset threshold temperature;
and when the refrigeration demand of the air conditioner is greater than a first preset refrigeration demand, controlling the compressor to be started so as to start the air conditioning unit.
15. The operation control method according to claim 14, wherein the controlling the compressor to be turned on when the cooling demand of the air conditioner is greater than a first preset cooling demand comprises:
when the refrigeration demand of the air conditioner is smaller than a second preset refrigeration demand, controlling the compressor to be closed;
acquiring the return air temperature at the return air inlet;
when the return air temperature is lower than a first preset temperature and the temperature of the machine room is lower than a second preset temperature, controlling the solid-state relay to be started, and controlling the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a third preset temperature or the temperature of the machine room is higher than a fourth preset temperature, the solid-state relay is controlled to be closed so as to close the electric heater;
the second preset refrigeration requirement is smaller than the first preset refrigeration requirement, the third preset temperature is larger than the first preset temperature, and the fourth preset temperature is larger than the second preset temperature.
16. The operation control method according to claim 14, wherein when controlling the compressor to be turned on when the cooling demand of the air conditioner is greater than a first preset cooling demand, comprises:
acquiring the air return temperature at the air return opening and the air supply temperature at the air supply opening;
when the humidity of the machine room is smaller than a first preset humidity, the return air temperature is smaller than a fifth preset temperature, the air supply temperature is smaller than a sixth preset temperature, and the refrigeration demand of the air conditioner is smaller than a third preset refrigeration demand, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration demand of the air conditioner so as to adjust the heating quantity of the electric heater;
when the return air temperature is higher than a seventh preset temperature, or the supply air temperature is higher than an eighth preset temperature, or the refrigeration requirement of the air conditioning unit is higher than a fourth preset refrigeration requirement, controlling a solid-state relay to be closed so as to close the electric heater;
the seventh preset temperature is higher than the fifth preset temperature, the eighth preset temperature is higher than the sixth preset temperature, and the fourth preset refrigeration demand is higher than the third preset refrigeration demand and lower than the first preset refrigeration demand.
17. The operation control method according to claim 14, wherein the controlling the compressor to be turned on when the cooling demand of the air conditioner is greater than a first preset cooling demand, comprises:
when the humidity of the machine room is higher than the first preset humidity and the temperature of the machine room is lower than the ninth preset temperature, controlling the solid-state relay to be started, and adjusting the output voltage of the solid-state relay according to the refrigeration requirement of the air conditioner so as to adjust the heating quantity of the electric heater;
when the humidity of the machine room is smaller than the second preset humidity or the temperature of the machine room is larger than a tenth preset temperature, controlling the solid-state relay to be closed so as to close the electric heater;
the tenth preset temperature is higher than the ninth preset temperature, and the second preset humidity is lower than the first preset humidity.
18. The operation control method according to claim 14, wherein the controlling of the compressor before being turned on includes:
judging whether the air conditioner has a serious alarm or not;
and if no serious alarm exists, controlling the compressor to be started.
19. An operation control device of an indoor unit of an air conditioner, comprising:
the acquiring unit acquires the temperature and humidity of the machine room;
and the control unit controls the working state of the compressor and the output voltage of the solid-state relay according to the temperature of the machine room and the humidity of the machine room.
CN202110630330.9A 2021-06-07 2021-06-07 Air conditioner indoor unit, operation control method and device thereof and air conditioner unit Pending CN115507420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110630330.9A CN115507420A (en) 2021-06-07 2021-06-07 Air conditioner indoor unit, operation control method and device thereof and air conditioner unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110630330.9A CN115507420A (en) 2021-06-07 2021-06-07 Air conditioner indoor unit, operation control method and device thereof and air conditioner unit

Publications (1)

Publication Number Publication Date
CN115507420A true CN115507420A (en) 2022-12-23

Family

ID=84500316

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110630330.9A Pending CN115507420A (en) 2021-06-07 2021-06-07 Air conditioner indoor unit, operation control method and device thereof and air conditioner unit

Country Status (1)

Country Link
CN (1) CN115507420A (en)

Similar Documents

Publication Publication Date Title
US9671125B2 (en) Fan controller
US8757506B2 (en) PTAC dehumidification without reheat and without a humidistat
US6996999B2 (en) Method and apparatus for controlling humidity with an air conditioner
US20080116289A1 (en) System and method to control sensible and latent heat in a storage unit
EP2253898A1 (en) Indoor unit and air conditioning apparatus including the same
WO1993010411A1 (en) Method and apparatus for latent heat extraction
CN110736145B (en) Double-air-duct air conditioner and dehumidification method and system thereof
CN111503821B (en) Control method of air conditioner
US7628337B2 (en) Secondary heating system
CN109210740B (en) Heating structure for regional heating, control method, air conditioner indoor unit and air conditioner
CN104697085A (en) Household combination type radiant air conditioning system, control method and corresponding control system
US20220090803A1 (en) Integrated space conditioning and water heating systems and methods thereto
CN110986198A (en) VRV air conditioning system suitable for equipment room
CN115066583A (en) Thermal energy assembly
EP3967944B1 (en) Outside air treatment device and air conditioning system
JPH09101055A (en) Branching unit for air conditioner and air conditioner using it
CN112665102A (en) Fan coil control method based on cold quantity calculation
CN115507420A (en) Air conditioner indoor unit, operation control method and device thereof and air conditioner unit
CN110736143B (en) Double-air-duct air conditioner and dehumidification method and system thereof
US4324288A (en) Level supply air temperature multi-zone heat pump system and method
CN109668273A (en) Refrigerating plant control method, refrigerating plant and storage medium
JPH07332738A (en) Fan convector
Hart Advanced Unitary HVAC Control Sequence.
CN207438825U (en) A kind of controlling system of central air conditioner
JP2000111105A (en) Air-conditioning system for office building

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination