CN115597135A - Dehumidifier air outlet temperature control method and system and dehumidifier - Google Patents

Dehumidifier air outlet temperature control method and system and dehumidifier Download PDF

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Publication number
CN115597135A
CN115597135A CN202211145788.6A CN202211145788A CN115597135A CN 115597135 A CN115597135 A CN 115597135A CN 202211145788 A CN202211145788 A CN 202211145788A CN 115597135 A CN115597135 A CN 115597135A
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China
Prior art keywords
temperature
outlet
dehumidifier
air
actual
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CN202211145788.6A
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Chinese (zh)
Inventor
王启玉
王宜金
赵孟奎
黄哲
王浩亭
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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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Priority to CN202211145788.6A priority Critical patent/CN115597135A/en
Publication of CN115597135A publication Critical patent/CN115597135A/en
Pending legal-status Critical Current

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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
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Drying Of Gases (AREA)

Abstract

The invention provides a dehumidifier air outlet temperature control method, a dehumidifier air outlet temperature control system and a dehumidifier, and relates to the technical field of dehumidifiers. The temperature control method of the present invention includes at least one control cycle, each control cycle including: acquiring an actual ambient temperature at an inlet side of an evaporator and a first actual outlet air temperature at an outlet side of a condenser; calculating to obtain a theoretical air outlet temperature by using the actual environment temperature and a pre-stored preset environment temperature; and adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature so as to control the temperature of the outlet air of the dehumidifier. According to the invention, the temperature of the air outlet of the dehumidifier can be adjusted only by calculating and comparing the actual environment temperature and the preset environment temperature and then adjusting the electronic expansion valve according to the results, complex structures such as a bypass valve and the like are not required to be additionally added, the design difficulty of the system is reduced, and the cost is also reduced.

Description

Dehumidifier air outlet temperature control method and system and dehumidifier
Technical Field
The invention relates to the technical field of dehumidifiers, in particular to a dehumidifier air outlet temperature control method, a dehumidifier air outlet temperature control system and a dehumidifier.
Background
Generally, after wet air entering the dehumidifier from an air inlet is condensed by an evaporator and heated by a condenser, the temperature of the discharged air is higher than that of the entering air due to the cold energy conservation principle. For a cold environment temperature, the process is beneficial to body feeling, and for a use environment with a higher environment temperature such as summer and the like, when the air outlet temperature of the dehumidifier is directly not processed at all, the higher air outlet temperature can bring poorer use experience to users. In the existing dehumidifier, if the outlet air temperature needs to be adjusted, the outlet air temperature of the dehumidifier is mostly controlled by replacing or adding external accessories, for example, by arranging a bypass pipe or adding a heat exchanger. The design can increase the complexity of the dehumidifier structure and increase the cost.
Disclosure of Invention
An object of the first aspect of the present invention is to provide a method for controlling an outlet temperature of a dehumidifier, which solves the problem of cost increase caused by the need of additionally adding components to adjust and control an outlet temperature in the prior art.
Another object of the first aspect of the present invention is to solve the problem of untimely temperature adjustment of the air outlet of the dehumidifier.
An object of the second aspect of the present invention is to provide a temperature control system for an outlet of a dehumidifier.
An object of the third aspect of the present invention is to provide a dehumidifier including the above dehumidifier outlet temperature control system.
Particularly, the invention also provides a dehumidifier air outlet temperature control method, wherein the dehumidifier comprises an evaporator, a condenser and an electronic expansion valve, the temperature control method comprises at least one control cycle, and each control cycle comprises the following steps:
acquiring an actual ambient temperature at the inlet side of the evaporator and a first actual outlet air temperature at the outlet side of the condenser;
calculating to obtain a theoretical air outlet temperature by using the actual environment temperature and a pre-stored preset environment temperature;
and adjusting the opening of an electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature so as to control the temperature of the outlet air of the dehumidifier.
Optionally, calculating the theoretical outlet air temperature by using the actual environment temperature and a pre-stored preset environment temperature includes:
inputting the actual environment temperature and the preset environment temperature into a preset formula to calculate to obtain the theoretical environment temperature; wherein the preset formula is as follows: m1| T3-T1| = m2 (T2 '-T1), where m1 is the air volume mass of the air at the air inlet, T3 is the preset ambient temperature, T1 is the actual ambient temperature, m2 is the air volume mass of the air at the air outlet, and T2' is the theoretical outlet air temperature.
Optionally, the step of adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature includes:
subtracting the first actual outlet air temperature from the theoretical outlet air temperature to obtain a first difference value;
when the first difference is larger than a difference threshold value, adjusting the opening degree of the electronic expansion valve until the difference is smaller than or equal to the difference threshold value;
and when the first difference is smaller than or equal to the difference threshold value, controlling the opening degree of the electronic expansion valve to be unchanged.
Optionally, the step of adjusting the opening degree of the electronic expansion valve until the first difference is less than or equal to a preset threshold when the first difference is greater than the preset threshold comprises:
when the first difference value is larger than the preset threshold value, reducing the opening degree of the electronic expansion valve by a preset percentage;
after maintaining the preset time, obtaining the adjusted second actual outlet air temperature, wherein the preset time is less than the duration time of one control cycle;
judging whether to continuously adjust the opening degree of the electronic expansion valve according to the second actual outlet air temperature;
and repeating the process after determining that the opening degree of the electronic expansion valve needs to be continuously adjusted.
Optionally, the step of determining whether to continue adjusting the opening degree of the electronic expansion valve according to the second actual outlet air temperature includes:
subtracting the second actual air outlet temperature from the theoretical air outlet temperature to obtain a second difference value;
when the second difference is larger than the difference threshold value, determining that the opening degree of the electronic expansion valve needs to be continuously adjusted;
and when the second difference is smaller than or equal to the difference threshold value, determining that the opening degree of the electronic expansion valve does not need to be continuously adjusted.
Optionally, the ratio of the duration of one control period to the preset time is an integer greater than 1.
Optionally, the difference threshold is 0.2 ℃ to 0.5 ℃.
Optionally, after the step of adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature, the method further includes:
and when the actual environment temperature is greater than or equal to the theoretical environment temperature, controlling to adjust the opening of the electronic expansion valve to the maximum opening.
Particularly, the invention also provides a dehumidifier air outlet temperature control system, which comprises a memory and a processor, wherein the memory stores a machine executable program, and the machine executable program is used for realizing the dehumidifier air outlet temperature control method when being executed by the processor.
Particularly, the invention also provides a dehumidifier which comprises the dehumidifier air outlet temperature control system.
In the scheme, the adjustment of the temperature of the air outlet of the dehumidifier can be realized only by calculating and comparing the actual environment temperature and the preset environment temperature and then adjusting the electronic expansion valve according to the results, complex structures such as a bypass valve and the like are not required to be additionally added, the design difficulty of the system is reduced, and the cost is also reduced.
According to the scheme, the temperature of the air outlet of the dehumidifier can be adjusted in real time through periodic control, so that the air outlet temperature of the dehumidifier is close to the preset environment temperature as much as possible, and therefore the temperature can be adjusted in time, the environment where the dehumidifier is located is always at the temperature required by a user, and the use experience is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
FIG. 1 is a schematic block diagram of a dehumidifier according to one particular embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for controlling the temperature of an outlet of a dehumidifier according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart diagram of the step of adjusting the electronic expansion valve based on the theoretical outlet air temperature and the first actual outlet air temperature in a method according to an embodiment of the present invention;
FIG. 4 is a schematic flow chart of steps in a method according to a particular embodiment of the invention for adjusting an opening degree of an electronic expansion valve when a first difference is greater than a preset threshold until the first difference is less than or equal to the preset threshold;
fig. 5 is a schematic flowchart of a step of determining whether to continue adjusting the opening degree of the electronic expansion valve according to the second actual outlet air temperature in the method according to an embodiment of the present invention.
FIG. 6 is a schematic structural diagram of an outlet temperature control system of a dehumidifier according to an embodiment of the present invention;
fig. 7 is a schematic structural view of a dehumidifier according to another embodiment of the present invention.
Detailed Description
FIG. 1 is a schematic block diagram of a dehumidifier according to a specific embodiment of the present invention;
as a specific embodiment of the present invention, this embodiment provides a method for controlling the temperature of an outlet of a dehumidifier. Specifically, the dehumidifier 100 may include an evaporator 10, a condenser 20, and an electronic expansion valve 30, and the medium circulating in the condenser 20 and the evaporator 10 may be adjusted by adjusting an opening degree of the electronic expansion valve 30.
Fig. 2 is a schematic flow chart of a method for controlling the temperature of an outlet of a dehumidifier according to an embodiment of the present invention. Specifically, the method for controlling the temperature of the air outlet of the dehumidifier of the embodiment may include at least one control cycle, and each control cycle may include:
step S100, acquiring an actual ambient temperature at an inlet side of an evaporator and a first actual outlet air temperature at an outlet side of a condenser;
step S200, calculating to obtain a theoretical air outlet temperature by using the actual environment temperature and a pre-stored preset environment temperature;
and step S300, adjusting the opening of the electronic expansion valve according to the theoretical air outlet temperature and the first actual air outlet temperature so as to control the air outlet temperature of the dehumidifier.
Specifically, in step S100, the ambient temperature at the inlet side of the generator is generally the ambient temperature of the current dehumidifier, and the actual outlet air temperature at the outlet of the condenser may affect the ambient temperature of the subsequent dehumidifier.
Specifically, in this embodiment, the theoretical air-out temperature is obtained by calculating the actual ambient temperature and the preset ambient temperature, and then the electronic expansion valve is adjusted by the theoretical air-out temperature and the first actual air-out temperature, so that the temperature of the air outlet of the dehumidifier can be adjusted, the air-out temperature is made to approach the preset ambient temperature as much as possible, the final air-out temperature of the dehumidifier is made to approach the preset air-out temperature as much as possible, and the user experience is improved.
In this embodiment, the adjustment of the temperature of the air outlet of the dehumidifier can be achieved only by calculating and comparing the actual ambient temperature and the preset ambient temperature and then adjusting the electronic expansion valve according to the results, without additionally adding complex structures such as a bypass valve, etc., thereby reducing the design difficulty of the system and reducing the cost.
As a specific embodiment of the present invention, the step S200 of the embodiment of calculating the theoretical outlet air temperature by using the actual ambient temperature and the pre-stored preset ambient temperature includes:
inputting the actual environment temperature and the preset environment temperature into a preset formula to calculate to obtain a theoretical environment temperature; wherein, the preset formula is as follows: the product of the absolute value of the difference value between the preset environment temperature and the actual environment temperature and the air volume quality of the air inlet is equal to the difference value between the theoretical air outlet temperature and the actual environment temperature and the air volume quality of the air outlet.
Specifically, the product of the absolute value of the difference between the preset ambient temperature and the actual ambient temperature at the air inlet and the product of the specific heat capacity of the air at the air inlet and the air volume quality of the air at the air inlet is equal to the product of the difference between the theoretical air outlet temperature and the actual ambient temperature and the product of the specific heat capacity of the air at the air outlet and the air volume quality of the air outlet. The preset environment temperature is defined as T3, the actual environment temperature T1, the specific heat capacity C1 of air at the air inlet, the air volume mass of the air at the air inlet is defined as m1, the theoretical air outlet temperature T2', the specific heat capacity C2 of the air at the air outlet and the air volume mass m2 of the air at the air outlet. Then the above equation becomes C1m1| T3-T1| = C2m2 (T2' -T1). Specifically, the specific heat capacities of the air at the air inlet and the air outlet may be determined to be the same, that is, C1= C2, so that two sides of the equation may be cancelled, and a preset formula m1| T3-T1| = m2 (T2' -T1) is obtained. The ratio lambda of the air volume mass m1 of the air inlet to the air volume mass m2 of the air outlet is a fixed value for each dehumidifier. Of course, the ratio λ is different for different dehumidifiers. Normally, the air mass of the air outlet of each dehumidifier is generally 80% -90% of the air mass of the air inlet, and each dehumidifier is in a fixed proportion and can be determined when leaving a factory. Therefore, eventually the formula can be transformed to | T3-T1| = λ (T2' -T1).
Specifically, the preset ambient temperature T3 is a set known number, T1 is a measured known number, and λ is also a known number, and the theoretical outlet air temperature T2' can be obtained by the above formula.
FIG. 3 is a schematic flow chart of a step of adjusting an electronic expansion valve based on a theoretical outlet air temperature and a first actual outlet air temperature according to an embodiment of the present invention; as a specific embodiment of the present invention, the step S300 of adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature in this embodiment may include:
step S301, subtracting a first actual air outlet temperature from a theoretical air outlet temperature to obtain a first difference value;
step S302, when the first difference is larger than the difference threshold, the opening degree of the electronic expansion valve is adjusted until the difference is smaller than or equal to the difference threshold;
and step S303, controlling the opening degree of the current electronic expansion valve to be unchanged when the first difference is smaller than or equal to the difference threshold value.
In this embodiment, generally speaking, the dehumidifier system has heat loss, so the theoretical outlet temperature on the outlet side needs to be greater than or equal to the actual outlet temperature. When the theoretical outlet air temperature is used for subtracting the first actual outlet air temperature to obtain a first difference value, and the difference value threshold value is compared, when the first difference value is smaller than or equal to the difference value threshold value, the actual outlet air temperature of the dehumidifier can be considered to reach the theoretical outlet air temperature at the moment, and the environment of the dehumidifier can finally reach the preset environment temperature according to the actual outlet air temperature at the moment. When the first difference is greater than the difference threshold, it is indicated that the actual outlet air temperature of the dehumidifier at this time does not reach the theoretical outlet air temperature, and if the actual outlet air temperature continues to be performed according to the outlet air temperature at this time, the ambient temperature cannot reach the theoretical ambient temperature, so that the outlet air temperature of the dehumidifier needs to be adjusted. The opening degree of the electronic expansion valve can be controlled to regulate the temperature of the air outlet of the dehumidifier. More specifically, in this embodiment, the opening degree of the resistance expansion valve may be reduced, so that the temperature of the exhaust port of the dehumidifier continuously rises until the actual outlet air temperature approaches the theoretical outlet air temperature.
In general, the threshold difference may be in the range of 0.2 ℃ to 0.5 ℃, for example the threshold difference may be 0.2 ℃, 0.3 ℃ or 0.5 ℃. Preferably 0.2 deg.c. Specifically, when the theoretical outlet air temperature minus the first actual outlet air temperature obtains a first difference value smaller than 0.2 ℃, it is indicated that the actual outlet air temperature at this time substantially reaches the preset ambient temperature.
Fig. 4 is a schematic flow chart of steps for adjusting the opening degree of the electronic expansion valve until the first difference is less than or equal to a preset threshold value when the first difference is greater than the preset threshold value, according to a specific embodiment of the present invention. As a specific embodiment of the present invention, in step S302 of this embodiment, the step of adjusting the opening degree of the electronic expansion valve until the first difference is smaller than or equal to the preset threshold when the first difference is larger than the preset threshold includes:
step S3021, when the first difference is greater than a preset threshold, reducing the opening degree of the electronic expansion valve by a preset percentage;
step S3022, after maintaining the preset time, obtaining the adjusted second actual outlet air temperature at the moment, wherein the preset time is less than the duration of one control cycle;
step S3023, judging whether to continuously adjust the opening of the electronic expansion valve according to the second actual outlet air temperature; if not, the opening of the electronic expansion is kept unchanged, and if so, step S3021 is executed.
Specifically, in this embodiment, when the first difference is greater than the preset threshold, the opening degree of the electronic expansion valve may be first reduced by a preset percentage, specifically, the opening degree of the electronic expansion valve may be reduced by one third or one fourth, and specifically, the opening degree may be set freely. And after the electronic expansion valve reduces a certain opening degree, the second actual outlet air temperature of the air outlet of the dehumidifier is continuously detected after the electronic expansion valve stays for a certain time. Specifically, the second actual outlet air temperature may be compared with the theoretical outlet air temperature calculated previously to calculate whether the opening of the electronic expansion valve needs to be further adjusted.
In fact, since the electronic expansion valve needs a certain time for the influence of the whole outlet air temperature after adjusting the opening degree, it is necessary to maintain the electronic expansion valve at least for a preset time to detect the second actual outlet air temperature at the outlet of the dehumidifier, which may increase the accuracy.
Specifically, the ratio of the duration of one control cycle to the preset time is an integer greater than 1. The preset time of the present embodiment is less than the duration of the present period, and generally speaking, what percentage of the electronic expansion valve opening is adjusted is occupied by the preset time, and the preset time occupies the corresponding percentage of the whole period. For example, in one control cycle, the opening degree of the electronic expansion valve is initially maximized, and when the first difference is greater than the difference threshold, the electronic expansion valve may be decreased by 20%, so that the opening degree may be changed to 0 through 5 times of adjustment. And in this control cycle, if the time that the time of predetermineeing is direct equals or is bigger even with the control cycle duration, then can't reach the air-out temperature in this application and reach the purpose of predetermineeing ambient temperature. It may therefore be preferred that the preset time is also 1/5 of the duration of one control cycle, i.e. the ratio between the time the control cycle lasts and the preset is 5. Specifically, the electronic expansion valve can be adjusted from the maximum to the minimum in the preset period, and the purpose that the outlet air temperature can be adjusted to reach the preset environment temperature in the period is guaranteed.
Further, if the difference between the second actual outlet air temperature and the theoretical outlet air temperature is still greater than the difference threshold after the primary adjustment is performed, the adjustment is continued in the above manner until the difference is less than the difference threshold, and the adjustment is stopped.
Fig. 5 is a schematic flowchart of the steps of determining whether to continuously adjust the opening degree of the electronic expansion valve according to the second actual outlet air temperature according to an embodiment of the present invention. As a specific embodiment of the present invention, the step S3023 of determining whether to continue adjusting the opening degree of the electronic expansion valve according to the second actual outlet air temperature in this embodiment may include:
step S3024, subtracting a second actual outlet air temperature from the theoretical outlet air temperature to obtain a second difference value;
step S3025, when the second difference is greater than the difference threshold, determining that the opening degree of the electronic expansion valve needs to be continuously adjusted;
and step S3026, when the second difference is less than or equal to the difference threshold, determining that the opening degree of the electronic expansion valve does not need to be continuously adjusted.
In this embodiment, whether to continue adjusting the opening degree of the electronic expansion valve is performed in accordance with the same procedure as the aforementioned procedure. The difference is that in the same control period, the theoretical outlet air temperature is calculated only once, and the subsequent calculation and adjustment processes can utilize the theoretical outlet air temperature obtained by the first calculation until the control period is finished. The above process is repeated again when the next control cycle begins.
As a specific embodiment of the present invention, after the step S300 of adjusting the opening of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature, the method further includes:
and controlling to adjust the opening degree of the electronic expansion valve to the maximum opening degree when the actual environment temperature is greater than or equal to the theoretical environment temperature.
When the actual environment temperature is greater than or equal to the theoretical environment temperature by adjusting the opening degree of the electronic expansion valve, the opening degree of the electronic expansion valve can be adjusted to the maximum, so that the air outlet temperature of the dehumidifier can be reduced, and the environment temperature is not too high to cause poor use experience.
Generally, at the end of a control cycle, the electronic expansion valve has substantially reached the desired opening for that cycle, and at the beginning of the next cycle, there are deviations and re-adjustments are required because the actual inlet and outlet temperatures are now re-acquired and calculated. If the required temperature is reached, as in the above step, no adjustment is necessary, and if not, adjustment is continued in the above manner. After the dehumidifier finishes dehumidifying and the outdoor environment temperature reaches the preset environment temperature, the dehumidifier executes a shutdown process through the control chip, specifically, the opening of the electronic expansion valve is adjusted to the maximum, the environment temperature detector stops working, and the compressor and the fan are stopped.
FIG. 6 is a schematic structural diagram of an outlet temperature control system of a dehumidifier according to an embodiment of the present invention; as a specific embodiment of the present invention, the embodiment further provides a dehumidifier outlet temperature control system 200, where the dehumidifier outlet temperature control system 200 may include a memory 210 and a processor 220, and the memory 210 stores a machine executable program, and the machine executable program is used to implement the above dehumidifier outlet temperature control method when executed by the processor. The processor 220 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The processor 220 transmits and receives data through the communication interface. The memory 210 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, or a combination of memories. The above-described computing program may be downloaded from a computer readable storage medium to a corresponding computing/processing device or to a computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network.
Fig. 7 is a schematic structural view of a dehumidifier according to another embodiment of the present invention. As a specific embodiment of the present invention, this embodiment further provides a dehumidifier 100, and the dehumidifier 100 may further include the dehumidifier outlet temperature control system 200 described above.
It should be noted that the logic and/or steps shown in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (10)

1. The dehumidifier air outlet temperature control method is characterized in that the dehumidifier comprises an evaporator, a condenser and an electronic expansion valve, the temperature control method comprises at least one control cycle, and each control cycle comprises the following steps:
acquiring an actual ambient temperature at the inlet side of the evaporator and a first actual outlet air temperature at the outlet side of the condenser;
calculating to obtain a theoretical outlet air temperature by using the actual environment temperature and a pre-stored preset environment temperature;
and adjusting the opening of an electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature so as to control the temperature of the air outlet of the dehumidifier.
2. The method as claimed in claim 1, wherein the temperature control unit is further configured to control the temperature of the outlet of the dehumidifier,
the step of calculating the theoretical air outlet temperature by utilizing the actual environment temperature and the pre-stored preset environment temperature comprises the following steps:
inputting the actual environment temperature and the preset environment temperature into a preset formula to calculate to obtain the theoretical environment temperature; wherein the preset formula is as follows: m1| T3-T1| = m2 (T2 '-T1), where m1 is air volume mass of air at the air inlet, T3 is preset ambient temperature, T1 is actual ambient temperature, m2 is air volume mass of air at the air outlet, and T2' is theoretical air outlet temperature.
3. The method as claimed in claim 1, wherein the temperature of the outlet of the dehumidifier is controlled by the temperature of the outlet of the dehumidifier,
the step of adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature comprises the following steps:
subtracting the first actual outlet air temperature from the theoretical outlet air temperature to obtain a first difference value;
when the first difference is larger than a difference threshold value, adjusting the opening degree of the electronic expansion valve until the difference is smaller than or equal to the difference threshold value;
and when the first difference is smaller than or equal to the difference threshold value, controlling the opening degree of the electronic expansion valve to be unchanged.
4. The method as claimed in claim 3, wherein the temperature of the outlet of the dehumidifier is controlled by the temperature of the outlet of the dehumidifier,
when the first difference is larger than a preset threshold, the step of adjusting the opening degree of the electronic expansion valve until the first difference is smaller than or equal to the preset threshold comprises the following steps:
when the first difference value is larger than the preset threshold value, reducing the opening degree of the electronic expansion valve by a preset percentage;
after maintaining the preset time, obtaining the adjusted second actual outlet air temperature, wherein the preset time is less than the duration time of one control cycle;
judging whether to continuously adjust the opening degree of the electronic expansion valve according to the second actual outlet air temperature;
and repeating the process after determining that the opening degree of the electronic expansion valve needs to be continuously adjusted.
5. The method as claimed in claim 4, wherein the temperature of the outlet of the dehumidifier is controlled by the temperature of the outlet of the dehumidifier,
the step of judging whether to continuously adjust the opening degree of the electronic expansion valve according to the second actual outlet air temperature comprises the following steps:
subtracting the second actual air outlet temperature from the theoretical air outlet temperature to obtain a second difference value;
when the second difference is larger than the difference threshold value, determining that the opening degree of the electronic expansion valve needs to be continuously adjusted;
and when the second difference is smaller than or equal to the difference threshold value, determining that the opening degree of the electronic expansion valve does not need to be continuously adjusted.
6. The method as claimed in claim 4, wherein the temperature of the outlet of the dehumidifier is controlled by a temperature sensor,
the ratio of the duration of one control cycle to the preset time is an integer greater than 1.
7. The method as claimed in claim 3, wherein the temperature of the outlet of the dehumidifier is controlled by the temperature of the outlet of the dehumidifier,
the difference threshold is 0.2-0.5 ℃.
8. The method as claimed in claim 1, wherein the temperature of the outlet of the dehumidifier is controlled by the temperature of the outlet of the dehumidifier,
after the step of adjusting the opening degree of the electronic expansion valve according to the theoretical outlet air temperature and the first actual outlet air temperature, the method further comprises the following steps:
and when the actual environment temperature is greater than or equal to the theoretical environment temperature, controlling to adjust the opening of the electronic expansion valve to the maximum opening.
9. A dehumidifier outlet temperature control system, comprising a memory and a processor, wherein the memory stores a machine executable program, and the machine executable program is used for realizing the dehumidifier outlet temperature control method according to any one of claims 1 to 8 when being executed by the processor.
10. A dehumidifier comprising a dehumidifier outlet temperature control system according to claim 9.
CN202211145788.6A 2022-09-20 2022-09-20 Dehumidifier air outlet temperature control method and system and dehumidifier Pending CN115597135A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116398980A (en) * 2023-06-09 2023-07-07 新誉集团有限公司 Temperature control method and system for air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116398980A (en) * 2023-06-09 2023-07-07 新誉集团有限公司 Temperature control method and system for air conditioner
CN116398980B (en) * 2023-06-09 2023-09-08 新誉集团有限公司 Temperature control method and system for air conditioner

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