CN111578481A - Dehumidification control method of temperature and humidity independent control air conditioning system - Google Patents

Dehumidification control method of temperature and humidity independent control air conditioning system Download PDF

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Publication number
CN111578481A
CN111578481A CN202010398716.7A CN202010398716A CN111578481A CN 111578481 A CN111578481 A CN 111578481A CN 202010398716 A CN202010398716 A CN 202010398716A CN 111578481 A CN111578481 A CN 111578481A
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China
Prior art keywords
dehumidification
humidity
reduction
regeneration
controlled
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CN202010398716.7A
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Chinese (zh)
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CN111578481B (en
Inventor
罗荣邦
王飞
丁爽
袁俊军
许文明
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F1/0083—Indoor units, e.g. fan coil units with dehumidification means
    • 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
    • F24F11/80—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
    • 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
    • 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

Abstract

The invention relates to the technical field of air conditioning, in particular to a dehumidification control method of an air conditioning system with independent temperature and humidity control. The invention aims to solve the problem of low judgment precision of regeneration time of an adsorbent. To this end, the dehumidification control method of the present invention includes: when the dehumidification unit operates in a dehumidification mode, judging whether the solid adsorption component meets regeneration conditions; when the regeneration condition is met, controlling the dehumidification unit to operate a regeneration mode; the regeneration conditions include at least one of the following conditions: the indoor environment humidity is greater than or equal to a first humidity threshold value, and the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a first preset difference; the indoor ambient humidity is greater than or equal to a first humidity threshold and the rate of decrease of the indoor ambient humidity is less than a rate threshold. The dehumidification control method can improve the regeneration opportunity judgment accuracy of the solid adsorption component, balance between the dehumidification effect and the regeneration effect is achieved, and the dehumidification efficiency of the air conditioning system is improved.

Description

Dehumidification control method of temperature and humidity independent control air conditioning system
Technical Field
The invention relates to the technical field of air conditioning, in particular to a dehumidification control method of an air conditioning system with independent temperature and humidity control.
Background
The air conditioning system with independent temperature and humidity control can separately control the indoor temperature and the indoor humidity, thereby avoiding the problems of obvious cooling and large energy consumption in the dehumidification process in the prior technical scheme of refrigeration and dehumidification.
In the existing air conditioning system with independent temperature and humidity control, indoor dehumidification is usually realized by adopting solution dehumidification. Solution dehumidification is realized by absorbing moisture in the air in the process that indoor air flows through the moisture absorption solution, and the moisture absorption solution is regenerated by heating when the moisture absorption solution is diluted. However, in the practical application process, the hygroscopic solution is generally regenerated at regular time, that is, the hygroscopic solution starts heating regeneration after running for a certain time, and the regeneration mode is easy to cause too early or too late timing of entering the regeneration mode due to the fixed regeneration timing, and the situation that the hygroscopic solution is insufficiently or excessively regenerated due to too early or too late timing of entering the regeneration mode occurs, which seriously affects the dehumidification efficiency of the air conditioning system. That is, the existing air conditioning system with independent temperature and humidity control has the problems that the judgment precision of the regeneration time of the adsorbent is low, and the dehumidification efficiency is influenced.
Accordingly, there is a need in the art for a new dehumidification control method for an independent temperature and humidity control air conditioning system to solve the above problems.
Disclosure of Invention
In order to solve at least one of the above problems in the prior art, that is, to solve the problem of low judgment precision of regeneration timing of the adsorbent, the present invention provides a dehumidification control method for an independent temperature and humidity control air conditioning system, where the air conditioning system includes: the heat exchange unit comprises a compressor, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger which are connected through a refrigerant pipe, the outdoor heat exchanger is provided with an outer fan, the indoor heat exchanger is provided with an inner fan and a dehumidifying unit, the dehumidifying unit comprises a dehumidifying box, a solid adsorption component and a reduction component, the dehumidifying box is provided with a dehumidifying air inlet, a dehumidifying air outlet, a reduction air inlet and a reduction air outlet which can be opened and closed, the dehumidifying air inlet or the dehumidifying air outlet is provided with the dehumidifying fan, the reduction air inlet or the reduction air outlet is provided with the reduction fan, the solid adsorption component is fixedly arranged in the dehumidifying box and comprises a reduction coil pipe, the reduction coil pipe is coiled on the solid adsorption component, and a heat exchange medium is allowed to flow through the reduction coil pipe,
the dehumidification control method comprises the following steps:
when the dehumidification unit operates in a dehumidification mode, judging whether the solid adsorption component meets regeneration conditions;
when the regeneration condition is met, controlling the dehumidification unit to operate a regeneration mode;
when the dehumidification unit operates in a dehumidification mode, the dehumidification air inlet and the dehumidification air outlet are opened, and the dehumidification fan operates;
wherein the regeneration conditions comprise at least one of the following conditions:
the indoor environment humidity is greater than or equal to a first humidity threshold value, and the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a first preset difference;
the indoor ambient humidity is greater than or equal to the first humidity threshold and the rate of decrease of the indoor ambient humidity is less than a rate threshold.
In a preferred embodiment of the above method for controlling dehumidification of an air conditioning system with independent temperature and humidity control, the step of controlling the dehumidification unit to operate the regeneration mode when the regeneration condition is satisfied further includes:
when the regeneration condition is met, acquiring the operation mode of the heat exchange unit;
judging whether the heat exchange unit operates in a refrigeration mode or not;
and controlling the dehumidification unit to operate the regeneration mode based on the judgment result.
In an optimal technical solution of the dehumidification control method of the temperature and humidity independent control air conditioning system, two ends of the reduction coil are respectively communicated with the exhaust port of the compressor and the inlet of the outdoor heat exchanger, the exhaust port of the compressor is provided with a first electric control valve, the reduction coil is provided with a second electric control valve, and the step of controlling the dehumidification unit to operate in the regeneration mode "based on the judgment result further includes:
when the heat exchange unit operates in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the reduction fan is controlled to be opened, the dehumidification fan is controlled to be closed, and the second electric control valve is controlled to be opened and the first electric control valve is controlled to be closed.
In an preferable technical solution of the dehumidification control method of the independent temperature and humidity control air conditioning system, an exhaust port of the compressor is provided with a first electric control valve, and the reduction assembly further includes: the heat exchange device comprises a reduction water tank, wherein heat exchange liquid is stored in the reduction water tank, a first end and a second end of a reduction coil are respectively communicated with the reduction water tank, and a circulating pump is arranged on the reduction coil; a heat exchange coil: the heat exchange coil part is coiled in the reduction water tank, the first end of the heat exchange coil is communicated with the exhaust port of the compressor, and the second end of the heat exchange coil is communicated with the inlet of the outdoor heat exchanger; a second electrical valve disposed on the heat exchange coil and between the first end of the heat exchange coil and the reduction water tank; a second throttling element disposed on the heat exchange coil between the reduction water tank and the second end of the heat exchange coil; the step of controlling the dehumidifying unit to operate the regeneration mode based on the determination result further includes:
when the heat exchange unit operates in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the reduction fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is controlled to be closed, and the second throttling element is controlled to be fully opened.
In a preferable embodiment of the dehumidification control method of the independent temperature and humidity control air conditioning system, the step of controlling the dehumidification unit to operate the regeneration mode based on the determination result further includes:
when the heat exchange unit does not operate in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the compressor, the outer fan, the reduction fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is closed, the first throttling element is controlled to be fully opened, and the second throttling element is controlled to be opened to a set opening degree.
In a preferred technical solution of the dehumidification control method of the independent temperature and humidity control air conditioning system, the dehumidification control method further includes:
when the dehumidification unit runs in a regeneration mode, judging whether the dehumidification unit meets an exit condition;
and when the exit condition is met, controlling the dehumidification unit to exit the regeneration mode and continue to operate the dehumidification mode.
In a preferable technical solution of the dehumidification control method of the independent temperature and humidity control air conditioning system, the exit condition includes at least one of the following conditions:
the difference between the indoor environment humidity and the humidity of the solid adsorption component is greater than or equal to a second preset difference;
the operation time of the regeneration mode reaches a first preset time.
In a preferred technical solution of the dehumidification control method of the independent temperature and humidity control air conditioning system, the dehumidification control method further includes:
acquiring the indoor environment humidity and the humidity of the solid adsorption component;
calculating a difference between the indoor ambient humidity and the humidity of the solid sorption assembly;
comparing the indoor environment humidity with a second humidity threshold value, and comparing the difference value with a third preset difference value;
selectively controlling the dehumidifying unit to operate a dehumidifying mode or a regenerating mode based on the comparison result.
In a preferred embodiment of the dehumidification control method of the independent temperature and humidity control air conditioning system, the step of selectively controlling the dehumidification unit to operate in the dehumidification mode or the regeneration mode based on the comparison result further includes:
when the indoor environment humidity is greater than or equal to a second humidity threshold value and the difference value is greater than or equal to a third preset difference value, controlling the dehumidification unit to operate the dehumidification mode;
when the indoor environment humidity is greater than or equal to a second humidity threshold value and the difference value is smaller than a third preset difference value, controlling the dehumidification unit to operate the regeneration mode firstly and then operate the dehumidification mode;
when the indoor environment humidity is smaller than a second humidity threshold value and the difference value is larger than or equal to a third preset difference value, controlling the dehumidification unit to keep the current state or only operate the regeneration mode;
wherein the second humidity threshold is greater than the first humidity threshold.
In a preferred technical solution of the dehumidification control method of the independent temperature and humidity control air conditioning system, the dehumidification control method further includes:
judging whether the dehumidification unit meets a stop condition;
when the stop condition is met, controlling the dehumidifying unit to stop running;
wherein the stop condition includes:
the indoor ambient humidity is less than a stop humidity threshold;
the indoor environment humidity is more than or equal to the stop humidity threshold but less than the first humidity threshold, and the running time of the dehumidification unit reaches a second preset time.
The technical scheme includes that whether the solid adsorption component meets the regeneration condition or not is judged by combining the indoor environment humidity and the humidity of the solid adsorption component when the dehumidification unit operates in the dehumidification mode, and the dehumidification unit is controlled to operate in the regeneration mode when the regeneration condition is met.
Furthermore, when the regeneration condition is met, whether the heat exchange unit operates in a refrigeration mode or not is further judged, and the dehumidification control method can reasonably select the regeneration mode of the solid adsorption component based on the current state of the heat exchange unit, so that the regeneration energy consumption of the solid adsorption component is low, and the influence on user experience is small.
Furthermore, whether the quitting condition is met or not is judged when the dehumidification unit runs the regeneration mode, and the regeneration mode is quitted and the dehumidification mode is continuously run when the quitting condition is met.
Furthermore, whether the dehumidification mode is entered or not is judged jointly through the humidity that combines indoor environment humidity and solid adsorption component, and the dehumidification control method of this application can also effectively judge whether the adsorption capacity of current solid adsorption component is enough to dehumidify current indoor, dehumidifies indoor when having the ability, when adsorption capacity is not enough, then regenerates solid adsorption component earlier, dehumidifies indoor again.
Drawings
The control method of the independent temperature and humidity control air conditioning system according to the present invention will be described with reference to the accompanying drawings. In the drawings:
fig. 1 is a system diagram of a moderate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention;
fig. 2 is a main flowchart of a dehumidification control method of a moderate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention;
fig. 3 is a flowchart of a dehumidification control method of an intermediate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating a regeneration mode of a dehumidification unit of a moderate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention;
FIG. 5 is a system diagram of a moderate temperature humidity independent control air conditioning system according to a second embodiment of the present invention;
FIG. 6 is a flowchart illustrating a regeneration mode of a dehumidifying unit of a moderate temperature and humidity independent control air conditioning system according to a second embodiment of the present invention;
fig. 7 is a logic diagram of a dehumidification control method of an intermediate temperature and humidity independent control air conditioning system according to a second embodiment of the present invention.
List of reference numerals
1. A heat exchange unit; 11. a compressor; 111. a first electrically controlled valve; 12. an outdoor heat exchanger; 121. an outer fan; 13. a first throttling element; 14. an indoor heat exchanger; 141. an inner fan; 142. an indoor water pan; 143. a condensate pipe; 15. a master controller; 16. a chassis;
3. a dehumidification unit; 31. a dehumidification box; 311. a dehumidification air inlet; 312. a dehumidification air outlet; 313. a reduction gas inlet; 314. a reduction gas outlet; 315. a dehumidification fan; 316. a reduction fan; 32. a solid adsorbent assembly; 33. a reduction water tank; 34. reducing the coil pipe; 341. a circulation pump; 342. a cooling heat exchanger; 343. a cooling fan; 35. a heat exchange coil; 351. a second throttling element; 352. a second electrically controlled valve; 36. a cooling water tank; 361. a pipeline.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. For example, although the dehumidification control method is described in connection with an air conditioning system in a single cooling mode, this is not intended to limit the scope of the present application, and those skilled in the art may apply the dehumidification control method to other air conditioning systems without departing from the principles of the present application. For example, the dehumidification control method of the present application may also be applied to an air conditioning system with a four-way valve, and the like.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example 1
First, referring to fig. 1, the independent temperature and humidity control air conditioning system of the present invention will be described. Fig. 1 is a system diagram of an intermediate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention.
As shown in fig. 1, in the present embodiment, the independent temperature and humidity control air conditioning system (hereinafter, referred to as an air conditioning system or system for short) includes a heat exchange unit 1 and a dehumidification unit 3, where the heat exchange unit 1 mainly includes a compressor 11, an outdoor heat exchanger 12, an external fan 121, a first throttling element 13, an indoor heat exchanger 14, an internal fan 141, and a general controller 15. The compressor 11, the outdoor heat exchanger 12, the outer fan 121, the first throttling element 13, and the overall controller 15 are disposed in the cabinet 16 of the outdoor unit, and the indoor heat exchanger 14 and the inner fan 141 are disposed in the indoor unit. The compressor 11, the outdoor heat exchanger 12, the first throttling element 13 and the indoor heat exchanger 14 are connected through refrigerant pipes to form a refrigerant cycle, and a first electric control valve 111 is arranged at an exhaust port of the compressor 11. The general controller 15 is respectively connected with the compressor 11, the outer fan 121, the first electrically controlled valve 111, the first throttling element 13 and the inner fan 141, and is used for controlling the above components to operate. In this embodiment, the first throttling element 13 may be a valve body with controllable opening degree, such as an electronic expansion valve, and the first electronic control valve 111 may be a valve body capable of opening and closing, such as an electromagnetic valve.
It should be noted that, in the present embodiment, in order to clearly describe the connection relationship between the above components, the components of the outdoor unit are broken up and drawn in fig. 1, and those skilled in the art can understand that the installation positions of the components in the drawing are not actual installation positions.
With continued reference to fig. 1, the dehumidification unit 3 includes a dehumidification tank 31, a solid adsorption module 32, and a reduction module (not shown in the drawings). The dehumidifying tank 31 is provided with an openable dehumidifying air inlet 311, a dehumidifying air outlet 312, a reducing air inlet 313 and a reducing air outlet 314, which are opened and closed by a damper. The dehumidification air inlet 311 and the dehumidification air outlet 312 are respectively communicated with the indoor space, a dehumidification fan 315 is arranged at the dehumidification air outlet 312, a reduction air inlet 313 is communicated with the indoor space, a reduction air outlet 314 is communicated with the outdoor space, and a reduction fan 316 is arranged at the reduction air outlet 314.
The solid adsorption component 32 is fixedly arranged in the dehumidification box 31, and the solid adsorption component 32 comprises a solid adsorbent which can be silica gel, a molecular sieve, activated alumina or zeolite. The reduction assembly includes a reduction coil 34, and the reduction coil 34 is partially coiled on the solid adsorbent assembly 32, such as being wound along the outer side of the solid adsorbent assembly 32 or directly coiled inside the solid adsorbent assembly 32. The reducing coil 34 has a first end communicating with the discharge port of the compressor 11 and a second end communicating with the inlet of the outdoor heat exchanger 12, so that the reducing coil 34 allows the refrigerant (i.e., the heat exchange medium) to flow therethrough. In addition, a second electrically controlled valve 352 is provided on the reduction coil 34 adjacent the first end. The main controller 15 is also connected to the air valve, the dehumidifying fan 315, the reducing fan 316 and the second electric control valve 352 respectively, for controlling the above components. In the present embodiment, the second electronic control valve 352 may be a valve body such as an electromagnetic valve that can perform an opening and closing function.
The dehumidification control method of the independent temperature and humidity control air conditioning system according to the present application will be described with reference to fig. 2. Fig. 2 is a main flowchart of a dehumidification control method of an independent intermediate temperature and humidity control air conditioning system according to a first embodiment of the present invention.
As shown in fig. 2, in order to solve the problem of low accuracy in determining the regeneration timing of the adsorbent in the operation process of the conventional independent temperature and humidity control air conditioning system, the dehumidification control method mainly includes the following steps:
s101, when the dehumidification unit operates in a dehumidification mode, judging whether the solid adsorption component meets a regeneration condition; for example, whether the solid adsorption component satisfies the regeneration condition may be determined by determining the humidity (or called relative humidity, the same applies hereinafter) of the solid adsorption component, wherein the humidity of the solid adsorption component may be obtained by a humidity sensor disposed inside or outside the solid adsorption component.
Those skilled in the art can understand, when indoor humidity reaches certain threshold value, need to carry out dehumidification processing to indoor, total controller control dehumidification unit moves with the dehumidification mode this moment, control the dehumidification air inlet promptly, the dehumidification gas outlet is opened, and control the dehumidification fan and start, the room air gets into the dehumidification case from the dehumidification air inlet under the drive of dehumidification fan, and become drying air on the moisture in the air is adsorbed on the solid adsorbent when through the solid adsorption component, drying air returns indoorly through the dehumidification gas outlet, indoor humidity descends thereupon. And after the dehumidification unit operated with the dehumidification mode for a period of time, the adsorption efficiency of the solid adsorption component declined, when dropping to a certain degree, the solid adsorption module needs to be regenerated, therefore when the dehumidification unit operated the dehumidification mode, whether the solid adsorption component satisfied the regeneration condition was judged.
S103, controlling the dehumidification unit to operate a regeneration mode when the regeneration condition is met; for example, when the humidity of the solid adsorption component is larger than a certain threshold value, the dehumidification unit is controlled to operate the regeneration mode.
When the humidity of the solid adsorption component is greater than a certain threshold value, the fact that the moisture attached to the solid adsorption component is more at the moment is proved, the adsorption capacity of the solid adsorption component is greatly reduced, the dehumidification efficiency of the air conditioning system is reduced, the solid adsorption component needs to be regenerated at the moment, and therefore the dehumidification unit is controlled to operate the regeneration mode to remove the moisture in the solid adsorption component.
Among them, it is preferable that the regeneration condition includes at least one of the following conditions: the indoor environment humidity is greater than or equal to the first humidity threshold value, and the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a first preset difference. The indoor ambient humidity is greater than or equal to a first humidity threshold and the rate of decrease of the indoor ambient humidity is less than a rate threshold.
For example, the first humidity threshold may be 55%, the first preset difference may be 5%, when the indoor ambient humidity is greater than or equal to 55%, it is proved that the indoor humidity is decreased, but the indoor humidity still does not reach the optimal humidity range, and the difference between the indoor ambient humidity and the humidity of the solid adsorption element is less than 5%, it is proved that the indoor ambient humidity and the humidity of the solid adsorption element are relatively close to each other, and although the dehumidification can be continued, the adsorption capacity of the solid adsorption element is greatly decreased in this state, so that the solid adsorption element needs to be regenerated in time to improve the adsorption capacity thereof, and further improve the dehumidification efficiency of the air conditioning system.
For another example, the first humidity threshold may be 60%, the rate threshold may be 0.5%/min, and when the indoor ambient humidity is greater than or equal to 60%, it is proved that the indoor humidity has not reached the optimal humidity range, and continuous dehumidification is required. And the falling speed of the indoor humidity can be calculated by obtaining the humidity value of the indoor environment within a period of time, and when the falling speed is less than 0.5%/min, the falling speed is proved to be slow, although the dehumidification can be continued, the dehumidification capacity of the solid adsorption component is insufficient, and the solid adsorption component needs to be regenerated in time to improve the adsorption capacity of the solid adsorption component, so that the dehumidification efficiency of the air conditioning system is improved.
Whether the solid adsorption component meets the regeneration condition is judged jointly through the humidity of combining indoor environment humidity and the solid adsorption component when the dehumidification unit operates in the dehumidification mode, and the dehumidification unit is controlled to operate in the regeneration mode when the regeneration condition is met, the dehumidification control method can be combined with the current indoor environment state to judge whether the solid adsorption component needs to be regenerated, the regeneration opportunity of the solid adsorption component is matched with the current environment humidity, the regeneration opportunity judgment accuracy of the solid adsorption component is improved, the regeneration of the solid adsorption component is better, timely and reasonable, the balance of the dehumidification effect and the regeneration effect is realized, and the dehumidification efficiency of the air conditioning system is improved.
Next, a more preferred embodiment of the dehumidification control method of the present application will be described with reference to fig. 3 and 4. Fig. 3 is a flowchart of a dehumidification control method of an independent intermediate temperature and humidity control air conditioning system according to a first embodiment of the present invention; fig. 4 is a flowchart illustrating a regeneration mode of a dehumidifying unit of a moderate temperature and humidity independent control air conditioning system according to a first embodiment of the present invention.
As shown in fig. 3, in a preferred embodiment, the dehumidification control method of the independent temperature and humidity control air conditioning system of the present application includes the following steps:
s201, acquiring indoor environment humidity and humidity of a solid adsorption component; for example, the indoor ambient humidity is acquired by a humidity sensor provided at an arbitrary position of a dehumidification air inlet or an indoor unit of the dehumidification tank, and the humidity of the solid adsorption module is acquired by a humidity sensor provided inside or at the periphery of the solid adsorption module.
S203, calculating a difference value between the indoor environment humidity and the humidity of the solid adsorption component; for example, after the indoor ambient humidity and the humidity of the solid adsorption component are obtained, the indoor ambient humidity is used to subtract the humidity of the solid adsorption component, so as to obtain a difference value between the indoor ambient humidity and the humidity of the solid adsorption component.
S205, comparing the indoor environment humidity with a second humidity threshold value, and comparing the difference value with a third preset difference value; for example, the second humidity threshold is 60%, and the third preset difference value of 10% is, after calculating the difference value between the two, comparing the indoor ambient humidity with the magnitude of 60%, and comparing the difference value with the magnitude of 10%.
When the indoor environment humidity is greater than or equal to the second humidity threshold, the indoor humidity is proved to be too high at the moment and is not in the comfortable interval, and indoor dehumidification is needed. When the difference between the indoor environment humidity and the humidity of the solid adsorption component is larger than or equal to the third preset difference value, the difference between the solid adsorption component and the indoor environment humidity is proved to be larger, the adsorption capacity is better, and the solid adsorption component can be used for adsorbing indoor moisture.
And selectively controlling the dehumidification unit to operate in the dehumidification mode or the regeneration mode based on the comparison result after comparing the indoor environment humidity with the second humidity threshold value and the difference with a third preset difference value. Specifically, the method comprises the following steps:
(1) when the indoor ambient humidity is greater than or equal to the second humidity threshold value, but the difference between the indoor ambient humidity and the humidity of the solid adsorption component is smaller than a third preset difference value, step S207 is executed to control the dehumidification unit to operate the regeneration mode first and then operate the dehumidification mode. When the indoor environment humidity is greater than the second humidity threshold, it is proved that the indoor humidity is too high at the moment and is not in the comfortable interval, and indoor dehumidification is needed. When the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a third preset difference value, the difference between the solid adsorption component and the indoor environment humidity is proved to be smaller, the adsorption capacity is weaker, and the solid adsorption component is not suitable for adsorbing indoor moisture. At the moment, the dehumidification unit is controlled to firstly run a regeneration mode to regenerate the solid adsorption component, then the dehumidification unit is controlled to run a dehumidification mode, and the solid adsorption component is used for dehumidifying indoors.
(2) And when the indoor environment humidity is greater than the second humidity threshold value and the difference between the indoor environment humidity and the humidity of the solid adsorption assembly is greater than or equal to a third preset difference value, executing the step S211 and controlling the dehumidification unit to operate the dehumidification mode. When the indoor environment humidity is greater than or equal to the second humidity threshold, the indoor humidity is proved to be too high at the moment and is not in the comfortable interval, and indoor dehumidification is needed. When the difference between the indoor environment humidity and the humidity of the solid adsorption component is larger than or equal to the third preset difference value, the difference between the solid adsorption component and the indoor environment humidity is proved to be larger, the adsorption capacity is better, and the solid adsorption component can be used for adsorbing indoor moisture. Therefore, the dehumidification unit can be directly controlled to operate the dehumidification mode, and the solid adsorption component is used for adsorbing indoor moisture to dehumidify the indoor space.
(3) When the indoor ambient humidity is less than the second humidity threshold and the difference between the indoor ambient humidity and the humidity of the solid adsorption assembly is less than the third preset difference, step S217 is performed to control the dehumidification unit to operate only in the regeneration mode. When the indoor environment humidity is smaller than the second humidity threshold value, the indoor humidity is proved to be appropriate at the moment and is in a comfortable interval, and therefore indoor dehumidification is not needed. When the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a third preset difference value, the difference between the indoor environment humidity and the solid adsorption component is smaller, and although the solid adsorption component has certain adsorption capacity, the solid adsorption component still has the risk of insufficient adsorption capacity, so that for the sake of safety, the dehumidification unit can be controlled to only operate in a regeneration mode, and the solid adsorption component keeps better adsorption capacity after regeneration. Of course, it can be understood by those skilled in the art that when the above-mentioned determination condition is satisfied, the dehumidifying unit can be controlled to maintain the current state, and the regeneration mode is not operated, so as to save power.
(4) And when the indoor environment humidity is smaller than the second humidity threshold value and the difference between the indoor environment humidity and the humidity of the solid adsorption assembly is larger than or equal to a third preset difference value, keeping the current state and not executing any operation. When the indoor environment humidity is smaller than the second humidity threshold value, the indoor humidity is proved to be appropriate at the moment and is in a comfortable interval, and therefore indoor dehumidification is not needed. When the difference between the indoor environment humidity and the humidity of the solid adsorption component is larger than or equal to a third preset difference value, the difference between the indoor environment humidity and the solid adsorption component is proved to be larger, the adsorption capacity is stronger, therefore, no operation is needed, and the dehumidification unit is controlled to keep the current running state.
Whether the dehumidification unit gets into the dehumidification mode through the humidity joint judgement that combines indoor environment humidity and solid adsorption component, the dehumidification control method of this application can judge effectively whether the adsorption efficiency of current solid adsorption component is enough to dehumidify current indoor, effectively dehumidifies indoor when the ability is enough, when adsorption efficiency is not enough, then regenerates solid adsorption component earlier, dehumidifies indoor again, guarantees dehumidification efficiency and effect.
With continued reference to fig. 3, when the dehumidifying unit operates in the dehumidifying mode (step S211), the dehumidifying control method further includes:
s213, judging whether the solid adsorption component meets the regeneration condition; when the regeneration condition is met, returning to execute the step S207, and controlling the dehumidification unit to operate the regeneration mode; otherwise, when the regeneration condition is not satisfied, step S215 is executed to further determine whether the dehumidification unit satisfies the stop condition; when the stop condition is satisfied, executing step S221, and controlling the dehumidifying unit to stop operating; otherwise, when the stop condition is not satisfied, the process returns to step S211, and the dehumidifying unit is controlled to continue to operate in the dehumidifying mode.
Wherein the regeneration conditions include at least one of the following conditions: the indoor environment humidity is greater than or equal to the first humidity threshold value, and the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a first preset difference. The indoor ambient humidity is greater than or equal to a first humidity threshold and the rate of decrease of the indoor ambient humidity is less than a rate threshold.
Wherein the stop condition includes: the indoor environment humidity is less than the stop humidity threshold; the indoor environment humidity is larger than or equal to the stop humidity threshold value but smaller than the first humidity threshold value, and the operation time of the dehumidification unit reaches a second preset time.
For example, taking the first humidity threshold as 55% and the first preset difference as 5% as an example, when the indoor ambient humidity is greater than or equal to 55%, it is proved that the indoor humidity is decreased, but the optimum humidity interval is still not reached, and the difference between the indoor ambient humidity and the humidity of the solid adsorption element is less than 5%, it is proved that the humidity of the indoor ambient humidity and the humidity of the solid adsorption element are relatively close to each other, and although the dehumidification can be continued, the adsorption capacity of the solid adsorption element is greatly decreased in this state, so that the solid adsorption element needs to be regenerated in time to improve the adsorption capacity thereof, and further improve the dehumidification efficiency of the air conditioning system.
For another example, the first humidity threshold may be 55%, the rate threshold may be 0.5%/min, and when the indoor ambient humidity is greater than or equal to 55%, it is proved that the indoor humidity has not reached the optimal humidity range, and the dehumidification needs to be continued. And the falling speed of the indoor humidity can be calculated by obtaining the humidity value of the indoor environment within a period of time, and when the falling speed is less than 0.5%/min, the falling speed is proved to be slow, although the dehumidification can be continued, the dehumidification capacity of the solid adsorption component is insufficient, and the solid adsorption component needs to be regenerated in time to improve the adsorption capacity of the solid adsorption component, so that the dehumidification efficiency of the air conditioning system is improved.
For another example, the stop humidity threshold may be 50%, when the indoor environment humidity is less than 50%, it is proved that the indoor humidity has dropped to a better humidity range at this time, and at this time, the dehumidification does not need to be continued, so that the dehumidification unit is controlled to stop operating; otherwise, the dehumidification mode still needs to be operated to dehumidify the indoor space.
For another example, the first humidity threshold may still be 55%, the second operation time may be 30min, and when the indoor environment humidity is greater than 50% but less than 55%, and the operation time of the dehumidification mode has reached 30min, it is proved that the dehumidification is slow at this time, and the current indoor humidity is not in the humidity range where the solid adsorption component needs to be regenerated, and in this time, for energy saving, although the indoor humidity does not reach the preferred humidity, the current humidity has dropped to an interval close to the humidity, so the dehumidification unit may be selected to be turned off.
Whether the solid adsorption component meets the regeneration condition is judged jointly through the humidity of combining indoor environment humidity and solid adsorption component when the dehumidification unit operates in the dehumidification mode, and the dehumidification unit is controlled to operate in the regeneration mode when the regeneration condition is met, the dehumidification control method can be combined with the state of the current indoor environment to judge whether the solid adsorption component needs to be regenerated, so that the regeneration opportunity of the solid adsorption component is matched with the current environment humidity, the regeneration opportunity judgment accuracy of the solid adsorption component is improved, the regeneration of the solid adsorption component is better, timely and reasonable, the balance of the dehumidification effect and the regeneration effect is realized, and the dehumidification efficiency of the air conditioning system is improved. By considering the running time length when judging whether the dehumidification unit meets the stop condition, the dehumidification control method can save energy and effectively avoid unnecessary consumption of electric energy caused by low dehumidification efficiency.
With continued reference to fig. 3, after step S207 in which the dehumidification unit operates the regeneration mode, the dehumidification control method further includes:
s209, judging whether the dehumidifying unit meets an exit condition; when the exiting condition is satisfied, executing step S211, controlling the dehumidifying unit to exit the regeneration mode and continue to operate the dehumidifying mode; otherwise, when the exit condition is not satisfied, the regeneration mode operation is continuously maintained.
Wherein the exit condition comprises at least one of the following conditions: the difference between the indoor environment humidity and the humidity of the solid adsorption component is greater than or equal to a second preset difference; the operation time period of the regeneration mode reaches a first preset time period.
For example, the second predetermined difference may be 10%, when the difference between the indoor ambient humidity and the humidity of the solid adsorption element is greater than 10%, it is proved that the difference between the indoor ambient humidity and the indoor humidity is relatively large, and it is also proved that the solid adsorption element has recovered to a sufficient adsorption capacity, and at this time, the regeneration mode does not need to be continued to be operated, but the regeneration mode is exited and the dehumidification mode is operated in time.
For another example, the first preset time period may be 10min, and when the regeneration mode of the solid adsorption module is operated for more than 10min, even if the difference between the indoor ambient humidity and the humidity of the solid adsorption module does not reach the standard of more than 10%, the adsorption capacity of the solid adsorption module is basically enough because the solid adsorption module has been operated in the regeneration mode for a sufficient time, so that the regeneration mode may be timely exited and the dehumidification mode may be operated.
By judging whether the quitting condition is met or not when the dehumidification unit operates the regeneration mode, and quitting the regeneration mode and continuing to operate the dehumidification mode when the quitting condition is met, the dehumidification control method can reasonably control the regeneration time based on the current indoor environment state, and gives consideration to the regeneration effect and the dehumidification efficiency.
Still referring to fig. 3, when step S217, that is, the step of the dehumidifying unit operating the regeneration mode, is performed, the dehumidification control method further includes:
s219, judging whether the dehumidifying unit meets an exit condition; when the exiting condition is satisfied, executing step S221, controlling the dehumidifying unit to exit the regeneration mode; otherwise, when the exit condition is not satisfied, the regeneration mode operation is continuously maintained.
For example, the exit condition is the same as the above condition, and when the exit condition is satisfied, it is proved that the adsorption capacity of the solid adsorption element is restored, and thus the regeneration mode is not required to be operated. Step S219 is performed on the premise that the indoor ambient humidity is less than the second humidity threshold, and at this time, no dehumidification is required in the room, so that the dehumidification unit is controlled to stop operating after the regeneration mode is exited.
Referring now to fig. 1 and 4, the manner in which the dehumidification unit operates in the regeneration mode will be described in detail. As shown in fig. 4, the step (S207 and S217) of operating the dehumidification unit in the regeneration mode specifically includes:
s301, acquiring the operation mode of the heat exchange unit; for example, in this embodiment, the operation mode of the heat exchange unit includes a cooling mode, an air supply mode, and the like, and the current operation mode of the heat exchange unit may be determined by obtaining operation parameters or determining whether the compressor is operating.
S303, judging whether the heat exchange unit operates in a refrigeration mode or not, and controlling the dehumidification unit to operate in a regeneration mode based on a judgment result. Specifically, when the heat exchange unit operates in the refrigeration mode, step S305 is executed to control the reduction air inlet and the reduction air outlet to be opened, the dehumidification air inlet and the dehumidification air outlet to be closed, the reduction fan to be opened and the dehumidification fan to be closed, and the second electric control valve to be opened and the first electric control valve to be closed; otherwise, when the heat exchange unit does not operate in the cooling mode, step S307 is executed to control the dehumidification unit to keep the state before entering the regeneration mode.
For example, referring to fig. 1, when the heat exchange unit 1 operates in the cooling mode, the compressor 11 is in an operating state, and the refrigerant is in a circulating state. At this time, the solid adsorbent 32 may be heated by passing the high-temperature and high-pressure refrigerant discharged from the compressor 11 through the reduction coil 34 to be regenerated. At this time, the second electronic control valve 352 is controlled to be opened, the first electronic control valve 111 is controlled to be closed, and the path of the refrigerant is changed, so that the refrigerant continues to circulate after passing through the reducing coil 34. Then the reduction air inlet 313 and the reduction air outlet 314 are controlled to be opened, the dehumidification air inlet 311 and the dehumidification air outlet 312 are controlled to be closed, the reduction fan 316 is controlled to be opened, the dehumidification fan 315 is controlled to be closed, the indoor air enters the dehumidification box 31 from the reduction air inlet 313 under the driving of the reduction fan 316 and is discharged to the outside from the reduction air outlet 314, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 11 is circulated to the solid adsorption component 32 through the reduction coil pipe 34 and then continues the conventional refrigeration cycle, the moisture in the solid adsorption component 32 is heated and evaporated into water vapor to be separated out by the high-temperature and high-pressure refrigerant, the separated water vapor is discharged to the outside along with the indoor air, and the solid adsorption component 32 realizes regeneration.
When the heat exchange unit 1 does not operate in the cooling mode, the compressor 11 is in a stopped state and the refrigerant is in an unrecycled state. At this time, the regeneration of the solid adsorbent 32 cannot be realized by the refrigerant flowing through the reduction coil 34. Since the determination condition for entering the regeneration mode has a certain margin, that is, the solid adsorption element 32 still has a certain adsorption capacity, at this time, the dehumidification unit 3 may be controlled to maintain the state before entering the regeneration mode, that is, if the dehumidification mode is being operated before, the dehumidification mode is continuously maintained to operate, and if the dehumidification mode is in the stop state before, the stop state is continuously maintained.
Through when satisfying regeneration condition, further judge heat transfer unit whether with the operation of refrigeration mode, the dehumidification control method of this application can also select the regeneration mode of solid adsorption component rationally based on heat transfer unit's current state for solid adsorption component's regeneration energy consumption is low, little to user experience influence, avoids the phenomenon of regeneration process to indoor blowing cold wind.
Of course, after referring to the structure shown in fig. 1, those skilled in the art may adjust the present step to operate the dehumidification module in the regeneration mode. For example, the compressor 11 is turned on and keeps operating at a low frequency, and the external fan 121 is controlled to be started, the internal fan 141 is controlled to operate at a low speed, the air deflector of the indoor unit is closed, and the first throttling element 13 is controlled to be opened to a certain opening degree, so that the cooling mode operation of the heat exchange unit 1 is realized on the premise that the indoor temperature is not affected as much as possible. And then the second electric control valve 352 is controlled to be opened, the first electric control valve 111 is controlled to be closed, the dehumidifying fan 315 is controlled to be closed, the reducing fan 316 is controlled to be opened, the reducing air inlet 313 and the reducing air outlet 314 are controlled to be opened, and the dehumidifying air inlet 311 and the dehumidifying air outlet 312 are controlled to be closed, so that the regeneration of the solid adsorption component 32 by the refrigerant through the reducing coil pipe 34 is realized.
Example 2
A second embodiment of the dehumidification control method of the present application will be described with reference to fig. 5 and 6. Fig. 5 is a system diagram of a moderate temperature and humidity independent control air conditioning system according to a second embodiment of the present invention; fig. 6 is a flowchart illustrating a regeneration mode of a dehumidifying unit of a moderate temperature and humidity independent control air conditioning system according to a second embodiment of the present invention.
As shown in fig. 5 and 6, the present embodiment is different from example 1 in that: the air conditioning system has a different specific configuration and the dehumidification unit 3 has a different regeneration mode control method.
Specifically, referring to fig. 5, in this embodiment, the heat exchange unit 1 further includes an indoor water receiving tray 142 and a condensed water pipe 143. The indoor water receiving tray 142 is installed in the indoor unit, and one end of the condensed water pipe 143 is communicated with the indoor water receiving tray 142, and the other end is led out of the room.
The reducing component of the dehumidifying unit 3 further includes a reducing water tank 33, a heat exchange coil 35, a cooling water tank 36, a cooling heat exchanger 342 and a cooling fan 343. Wherein, having deposited heat-transfer liquid (being heat transfer medium) in reduction water tank 33, like water or salt solution etc. reduction coil 34 coils and establishes behind solid adsorption component 32, its first end and reduction water tank 33 intercommunication, and the second end communicates with cooling water tank 36, has deposited the coolant liquid in cooling water tank 36, like water or salt solution etc. cooling water tank 36 passes through pipeline 361 and reduction water tank 33 intercommunication to cooling water tank 36 is higher than reduction water tank 33 on setting up the height. The position that is close to first end on reducing coil 34 is provided with circulating pump 341, and the position that is close to the second end is provided with cooling heat exchanger 342, and cooling heat exchanger 342 disposes cooling fan 343, and the preferred plate heat exchanger that adopts of cooling heat exchanger 342. Furthermore, the condensed water pipe 143 is led out of the room and is communicated with the cooling water tank 36.
The heat exchange coil 35 is partially coiled in the reduction water tank 33, and the coiled part in the reduction water tank 33 is S-shaped. After the heat exchange coil 35 is coiled, a first end of the heat exchange coil extends out of the reduction water tank 33 and is communicated with an exhaust port of the compressor 11 of the air conditioning system, and a second end of the heat exchange coil extends out of the reduction water tank 33 and is communicated with an inlet of the outdoor heat exchanger 12 of the air conditioning system. A second electronic control valve 352 is further disposed on the heat exchange coil 35 near the first end, such as a valve body capable of implementing an opening/closing function, for example, an electromagnetic valve, and a second throttling element 351 is further disposed on the heat exchange coil 35 near the second end, such as a valve body capable of controlling an opening degree, for example, an electronic expansion valve. The first electrically controlled valve 111 is located on the refrigerant pipe between the first end and the second end of the heat exchanging coil 35.
The master controller 15 of the air conditioning system is further connected to the circulating pump 341, the second throttling element 351 and the cooling fan 343 respectively, so as to control the above components to operate.
Referring to fig. 6, on the premise of adopting the above setting manner, when the dehumidification unit operates the regeneration mode, the step of the dehumidification unit operating the regeneration mode specifically includes:
s401, acquiring an operation mode of a heat exchange unit; for example, in this embodiment, the operation mode of the heat exchange unit includes a cooling mode, an air supply mode, and the like, and the current operation mode of the heat exchange unit may be determined by obtaining operation parameters or determining whether the compressor is operating.
And S403, judging whether the heat exchange unit operates in a refrigeration mode or not, and controlling the dehumidification unit to operate in a regeneration mode based on the judgment result. Specifically, when the heat exchange unit operates in the refrigeration mode, step S405 is executed to control the reduction air inlet and the reduction air outlet to be opened, the dehumidification air inlet and the dehumidification air outlet to be closed, the reduction fan, the cooling fan and the circulating pump to be opened, the dehumidification fan to be closed, the second electric control valve to be opened, the first electric control valve to be closed, and the second throttling element to be fully opened; otherwise, when the heat exchange unit does not operate in the refrigeration mode, the step S407 is executed, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the compressor, the outer fan, the reduction fan, the cooling fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is controlled to be closed, the first throttling element is controlled to be fully opened, and the second throttling element is controlled to be opened to a set opening degree.
For example, referring to fig. 5, when the heat exchange unit 3 operates in the cooling mode, the compressor 11 is in an operating state, and the refrigerant is in a circulating state. At this time, the heat-exchange liquid in the reduction water tank 33 can be heated by the high-temperature and high-pressure refrigerant discharged from the compressor 11, and then the solid adsorption assembly 32 is heated by passing the heat-exchange liquid through the reduction coil 34, so as to achieve the regeneration. At this time, the second electronic control valve 352 is controlled to be opened, the first electronic control valve 111 is controlled to be closed, the second throttling element 351 is controlled to be fully opened, and the path of the refrigerant is changed, so that the refrigerant continues to participate in the refrigeration cycle after passing through the heat exchange tube. And then the reduction air inlet 313 and the reduction air outlet 314 are controlled to be opened, the dehumidification air inlet 311 and the dehumidification air outlet 312 are controlled to be closed, the reduction fan 316, the cooling fan 343 and the circulating pump 341 are controlled to be started, and the dehumidification fan 315 is controlled to be closed. Indoor air enters the dehumidification box 31 from the reduction air inlet 313 under the driving of the reduction fan 316 and is discharged to the outdoor from the reduction air outlet 314, high-temperature and high-pressure gaseous refrigerant discharged by the compressor 11 enters the reduction water tank 33 through the heat exchange coil 35 and heats heat exchange liquid in the reduction water tank 33, the circulating pump 341 drives the heat exchange liquid to circulate between the reduction water tank 33 and the cooling water tank 36, when the heat exchange liquid is heated to a higher temperature and circulates to the solid adsorption component 32, moisture in the solid adsorption component 32 is heated and evaporated into vapor by the heat exchange liquid to be separated out, the separated vapor is discharged to the outdoor along with the indoor air, and the solid adsorption component 32 realizes regeneration. The heat-exchange liquid entering the reduced temperature water tank 36 exchanges heat with the outdoor air to achieve a temperature reduction when passing through the reduced temperature heat exchanger 342.
When the heat exchange unit 1 does not operate in the cooling mode, the compressor 11 is in a stopped state and the refrigerant is in an unrecycled state. At this time, the compressor 11 and the external fan 121 are controlled to be opened, the second electronic control valve 352 is opened, the first electronic control valve 111 is closed, the first throttling element 13 is fully opened, the second throttling element 351 is opened to a set opening degree, so that the refrigerant forms a circulation loop, then the reduction air inlet 313 and the reduction air outlet 314 are controlled to be opened, the dehumidification air inlet 311 and the dehumidification air outlet 312 are controlled to be closed, and the reduction fan 316, the cooling fan 343 and the circulation pump 341 are controlled to be opened. Under the driving of the reducing fan 316, the indoor air enters the dehumidification box 31 from the reducing air inlet 313 and is discharged to the outdoor from the reducing air outlet 314, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 11 enters the reduction water tank 33 through the heat exchange coil 35 and is changed into a medium-temperature and high-pressure liquid refrigerant after heat exchange with the heat exchange liquid in the reduction water tank 33, the medium-temperature and high-pressure liquid refrigerant is changed into a low-temperature and low-pressure gas-liquid two-phase refrigerant after throttling by the second throttling element 351, the low-temperature and low-pressure gas-liquid two-phase refrigerant enters the outdoor heat exchanger 12 to exchange heat with the outdoor air and is changed into a low-temperature and low-pressure gaseous refrigerant, and the low-temperature and low-. The circulating pump 341 drives the heated heat-exchange liquid to circulate between the reduction water tank 33 and the cooling water tank 36, when the heat-exchange liquid is heated to a higher temperature and circulates to the solid adsorption component 32, the moisture in the solid adsorption component 32 is heated by the heat-exchange liquid and evaporated into vapor to be separated out, the separated vapor is discharged to the outside along with the indoor air, and the solid adsorption component 32 realizes regeneration. The heat-exchange liquid entering the reduced temperature water tank 36 exchanges heat with the outdoor air to achieve a temperature reduction when passing through the reduced temperature heat exchanger 342.
Through when satisfying regeneration condition, further judge heat transfer unit whether with the operation of refrigeration mode, the dehumidification control method of this application can also select the regeneration mode of solid adsorption component rationally based on heat transfer unit's current state for solid adsorption component's regeneration energy consumption is low, little to user experience influence, avoids the phenomenon of regeneration process to indoor blowing cold wind. Through setting up reduction water tank and heat exchange coil in the reduction subassembly for when the solid adsorption subassembly needs regeneration, can utilize air conditioning system operation in-process compressor exhaust high temperature refrigerant to pass through the heat exchange coil and heat the heat transfer liquid in the reduction water tank, then utilize the circulating pump to drive the mode realization of heat transfer liquid circulation to the heating regeneration of solid adsorption subassembly. Through setting up cooling water tank and setting up cooling heat exchanger and cooling fan on the reduction coil, can be under the prerequisite of guaranteeing that heat transfer liquid is in appropriate heating temperature, prevent because the too high and evaporation that leads to of heat transfer liquid temperature is too fast, the circumstances such as lack of water appear, improve regeneration stability.
In addition, the setting of cooling water tank can further promote the heat transfer effect of refrigerant, improves the operating efficiency of air conditioner, reduces the operation energy consumption. Through setting up second throttling element for the regeneration process of solid adsorption component can independent operation, needn't realize with the help of the refrigeration mode, and the reduction of user experience that leads to along with the reduction of indoor temperature in the regeneration process of avoiding solid adsorption component.
Referring now to fig. 7, a possible control flow of the second embodiment of the present application will be described. Fig. 7 is a logic diagram of a dehumidification control method of a moderate temperature and humidity independent control air conditioning system according to a second embodiment of the present invention.
As shown in fig. 7, in one possible control procedure, step S501 is first executed to obtain the indoor environment humidity RHnAnd humidity RH of solid adsorption componentm。
Then, step S502 is executed to calculate the difference △ RH-RH between the indoor ambient humidity and the humidity of the solid adsorbing elementn-RHm。
Next, step S503 is executedJudgment of RHnWhether the humidity is more than or equal to 60 percent and △ RH is more than or equal to 10 percent is true, when the humidity is over-high and the adsorption capacity of the solid adsorption component is enough, the step S504 is executed, the dehumidification unit is controlled to operate the dehumidification mode, otherwise, when the humidity is not over-high and the adsorption capacity of the solid adsorption component is not enough, the step S505 is executed, and RH is further judgednWhether or not 60% or more is true.
When RH is equal tonWhen the humidity is more than or equal to 60 percent, the situation that the indoor humidity is too high but the adsorption capacity of the solid adsorption component is insufficient is proved, at this time, step S506 is executed, the dehumidification unit is controlled to firstly operate the regeneration mode and then operate the dehumidification mode; otherwise, when RH isnIf not, step S507 is executed to further determine whether △ RH is greater than or equal to 10%.
When the delta RH is more than or equal to 10 percent, the indoor humidity is suitable, but the solid adsorption component has the risk of insufficient adsorption capacity, at the moment, step S508 is executed, the dehumidification module is controlled to operate a regeneration mode, and the control is finished when the regeneration mode meets the exit condition; otherwise, when the delta RH is not more than or equal to 10 percent, the indoor humidity is proved to be suitable, the adsorption capacity of the solid adsorption component is stronger, and the control is directly finished at the moment.
When the dehumidifying unit operates in the dehumidifying mode in step S504 or when the dehumidifying unit operates in the dehumidifying mode in step S506, the indoor ambient humidity RH is obtainednAnd an operating time t1And executing the step S509 to judge RHnIf < 50% is true; when RH is equal tonIf the humidity is less than 50%, it is proved that the indoor humidity has dropped to an interval, at this time, step S510 is executed, the operation of the dehumidification unit is controlled to stop, and the control is ended; otherwise, when RH isnIf < 50% is not satisfied, the step S511 is executed to further judge that RH is more than or equal to 50%n< 55% and t1Whether the time is more than or equal to 30min or not.
When the ratio of RH is less than or equal to 50%n< 55% and t1When the time is more than or equal to 30min, the indoor humidity is proved to be close to the suitable interval and the running time is too long, at this time, step S510 is executed, the dehumidification unit is controlled to stop running, and the control is ended; otherwise, go to step S512, further based on the indoor ambient humidity RHnCalculating the indoor humidity at the set time t2Internal rate of descentDegree v is △ RHn/t2Then, RH is judgednWhether v is more than or equal to 55% and less than 0.5%/min.
When RH is equal tonWhen the concentration is more than or equal to 55% and v is less than 0.5%/min, the adsorption capacity of the solid adsorption component is proved to be insufficient, regeneration is needed, and at the moment, step S513 is executed to further judge whether the heat exchange unit operates in a refrigerating mode; otherwise, when RH isnAnd when the volume is greater than or equal to 55% and v is less than 0.5%/min, the adsorption capacity of the solid adsorption component is proved to be still acceptable, and at the moment, the step S504 is executed again, and the dehumidification unit is controlled to continue to operate the dehumidification mode.
When the heat exchange unit operates in a refrigeration mode, step S514 is executed, the dehumidification unit is controlled to operate in a first regeneration sub-mode, that is, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the reduction fan, the cooling fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is controlled to be closed, and the second throttling element is controlled to be fully opened; otherwise, when the heat exchange unit does not operate in the refrigeration mode, step S515 is executed, the dehumidification unit is controlled to operate in a second regeneration sub-mode, that is, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the compressor, the external fan, the reduction fan, the cooling fan and the circulating pump are controlled to be opened, the dehumidification fan is closed, the second electric control valve is controlled to be opened, the first electric control valve is closed, the first throttling element is fully opened, and the second throttling element is opened to a set opening degree.
When the dehumidification unit operates the first regeneration sub-mode, step S516 is performed to calculate the indoor ambient humidity RHnHumidity RH with solid adsorption componentmDifference △ RH, acquisition of regeneration mode operating time t3And judging △ RH is more than or equal to 10% or t3Whether the time is more than or equal to 5min or not, when △ RH is more than or equal to 10% or t3When the time is more than or equal to 5min, controlling the dehumidification unit to exit the first regeneration sub-mode and return to the step S504 to continue the dehumidification mode, otherwise, when △ RH is more than or equal to 10% or t3And if the time is not more than 5min, returning to the step S514, and controlling the dehumidification unit to continuously run the first regeneration sub-mode.
When the dehumidifying unit operates the second regeneration sub-mode, the step of executingStep S517, calculating the indoor environment humidity RHnHumidity RH with solid adsorption componentmDifference △ RH, acquisition of regeneration mode operating time t4And judging △ RH is more than or equal to 10% or t4Whether the time is more than or equal to 5min or not, when △ RH is more than or equal to 10% or t4When the time is more than or equal to 5min, controlling the dehumidification unit to exit the second regeneration sub-mode and return to the step S504 to continue the dehumidification mode, otherwise, when △ RH is more than or equal to 10% or t4And if the time is not more than 5min, returning to the step S515, and controlling the dehumidification unit to continuously operate the second regeneration sub-mode.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effect of the present embodiments, the steps may not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, and these simple variations are within the scope of the present invention. For example, the step of comparing the indoor ambient humidity with the second humidity threshold value, and the step of comparing the difference between the indoor ambient temperature and the humidity of the solid adsorption component with a third preset difference value, where the order between the two steps may be replaced; for another example, the steps of determining whether the dehumidification unit exits the dehumidification mode and whether the regeneration mode is operated may be reversed, etc.
It should be noted that, in the above embodiments, the structure of the air conditioning system is only used for illustrating the principle of the present application, and is not intended to limit the protection scope of the present application. Without departing from the principle of the present application, a person skilled in the art can adjust the structure of the air conditioning system, so that the present application can be applied to more specific application scenarios.
For example, in an alternative embodiment, the dehumidification fan 315 and the reduction fan 316 are not located exclusively, and may be located alternately to allow room air to pass through the solids adsorption assembly 32. For example, the dehumidifying fan 315 may be disposed at the dehumidifying air inlet 311, the reducing fan 316 may be disposed at the reducing air inlet 313, and the like.
For another example, in another alternative embodiment, although the above embodiment 2 describes that the reduction coil 34 is combined with a portion of the coil disposed inside the solid adsorbent assembly 32 and wound in an S-shape, the skilled person can adjust the arrangement manner, as long as the adjusted arrangement manner enables the reduction coil 34 to heat the solid adsorbent assembly 32. For example, the reducing coil 34 may be wound along the outer surface of the solid adsorbent assembly 32, or may be helically wound around the inner surface of the solid adsorbent assembly 32.
As another example, in another alternative embodiment, one skilled in the art may selectively omit one or more of the components described below for a particular application to enable the present application to be tailored to different application scenarios. Components include, but are not limited to: the system comprises a cooling water tank 36, a cooling heat exchanger 342, a cooling fan 343, a first electric control valve 111, a second electric control valve 352, a first throttling element 13, an indoor water receiving disc 142 and a condensate pipe 143. Accordingly, only corresponding adjustments need to be made in the control method.
Of course, the above alternative embodiments, and the alternative embodiments and the preferred embodiments can also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.
Those skilled in the art will appreciate that the general controller may also include other known structures such as processors, controllers, memories, etc., wherein the memories include, but are not limited to, ram, flash, rom, prom, volatile, non-volatile, serial, parallel, or registers, etc., and the processors include, but are not limited to, CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
It should be noted that although the detailed steps of the method of the present invention have been described in detail, those skilled in the art can combine, separate and change the order of the above steps without departing from the basic principle of the present invention, and the modified technical solution does not change the basic concept of the present invention and thus falls into the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A dehumidification control method of an air conditioning system with independent temperature and humidity control is characterized in that the air conditioning system comprises:
the heat exchange unit comprises a compressor, an outdoor heat exchanger, a first throttling element and an indoor heat exchanger which are connected through a refrigerant pipe, wherein the outdoor heat exchanger is provided with an outer fan, and the indoor heat exchanger is provided with an inner fan;
the dehumidification unit comprises a dehumidification box, a solid adsorption component and a reduction component, wherein the dehumidification box is provided with a dehumidification air inlet, a dehumidification air outlet, a reduction air inlet and a reduction air outlet which can be opened and closed, a dehumidification fan is arranged at the dehumidification air inlet or the dehumidification air outlet, a reduction fan is arranged at the reduction air inlet or the reduction air outlet, the solid adsorption component is fixedly arranged in the dehumidification box, the reduction component comprises a reduction coil pipe, the reduction coil pipe is coiled on the solid adsorption component, and a heat exchange medium is allowed to flow through the reduction coil pipe;
the dehumidification control method comprises the following steps:
when the dehumidification unit operates in a dehumidification mode, judging whether the solid adsorption component meets regeneration conditions;
when the regeneration condition is met, controlling the dehumidification unit to operate a regeneration mode;
when the dehumidification unit operates in a dehumidification mode, the dehumidification air inlet and the dehumidification air outlet are opened, and the dehumidification fan operates;
wherein the regeneration conditions comprise at least one of the following conditions:
the indoor environment humidity is greater than or equal to a first humidity threshold value, and the difference between the indoor environment humidity and the humidity of the solid adsorption component is smaller than a first preset difference;
the indoor ambient humidity is greater than or equal to the first humidity threshold and the rate of decrease of the indoor ambient humidity is less than a rate threshold.
2. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 1, wherein the step of controlling the dehumidification unit to operate the regeneration mode when the regeneration condition is satisfied further comprises:
when the regeneration condition is met, acquiring the operation mode of the heat exchange unit;
judging whether the heat exchange unit operates in a refrigeration mode or not;
and controlling the dehumidification unit to operate the regeneration mode based on the judgment result.
3. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 2, wherein two ends of the reduction coil are respectively communicated with an exhaust port of the compressor and an inlet of the outdoor heat exchanger, the exhaust port of the compressor is provided with a first electric control valve, the reduction coil is provided with a second electric control valve,
the step of controlling the dehumidifying unit to operate the regeneration mode based on the determination result further includes:
when the heat exchange unit operates in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the reduction fan is controlled to be opened, the dehumidification fan is controlled to be closed, and the second electric control valve is controlled to be opened and the first electric control valve is controlled to be closed.
4. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 2, wherein a first electric control valve is arranged at an exhaust port of the compressor, and the reduction assembly further comprises:
the heat exchange device comprises a reduction water tank, wherein heat exchange liquid is stored in the reduction water tank, a first end and a second end of a reduction coil are respectively communicated with the reduction water tank, and a circulating pump is arranged on the reduction coil;
a heat exchange coil: the heat exchange coil part is coiled in the reduction water tank, the first end of the heat exchange coil is communicated with the exhaust port of the compressor, and the second end of the heat exchange coil is communicated with the inlet of the outdoor heat exchanger;
a second electrical valve disposed on the heat exchange coil and between the first end of the heat exchange coil and the reduction water tank;
a second throttling element disposed on the heat exchange coil between the reduction water tank and the second end of the heat exchange coil;
the step of controlling the dehumidifying unit to operate the regeneration mode based on the determination result further includes:
when the heat exchange unit operates in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the reduction fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is controlled to be closed, and the second throttling element is controlled to be fully opened.
5. The dehumidification control method of an independent temperature and humidity control air conditioning system according to claim 4, wherein the step of controlling the dehumidification unit to operate the regeneration mode based on the determination result further comprises:
when the heat exchange unit does not operate in a refrigeration mode, the reduction air inlet and the reduction air outlet are controlled to be opened, the dehumidification air inlet and the dehumidification air outlet are controlled to be closed, the compressor, the outer fan, the reduction fan and the circulating pump are controlled to be opened, the dehumidification fan is controlled to be closed, the second electric control valve is controlled to be opened, the first electric control valve is closed, the first throttling element is controlled to be fully opened, and the second throttling element is controlled to be opened to a set opening degree.
6. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 1, further comprising:
when the dehumidification unit runs in a regeneration mode, judging whether the dehumidification unit meets an exit condition;
and when the exit condition is met, controlling the dehumidification unit to exit the regeneration mode and continue to operate the dehumidification mode.
7. The dehumidification control method of an independent temperature and humidity control air conditioning system according to claim 6, wherein the exit condition comprises at least one of:
the difference between the indoor environment humidity and the humidity of the solid adsorption component is greater than or equal to a second preset difference;
the operation time of the regeneration mode reaches a first preset time.
8. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 1, further comprising:
acquiring the indoor environment humidity and the humidity of the solid adsorption component;
calculating a difference between the indoor ambient humidity and the humidity of the solid sorption assembly;
comparing the indoor environment humidity with a second humidity threshold value, and comparing the difference value with a third preset difference value;
selectively controlling the dehumidifying unit to operate a dehumidifying mode or a regenerating mode based on the comparison result.
9. The dehumidification control method of an independent temperature and humidity control air conditioning system according to claim 8, wherein the step of selectively controlling the dehumidification unit to operate in the dehumidification mode or the regeneration mode based on the comparison result further comprises:
when the indoor environment humidity is greater than or equal to a second humidity threshold value and the difference value is greater than or equal to a third preset difference value, controlling the dehumidification unit to operate the dehumidification mode;
when the indoor environment humidity is greater than or equal to a second humidity threshold value and the difference value is smaller than a third preset difference value, controlling the dehumidification unit to operate the regeneration mode firstly and then operate the dehumidification mode;
when the indoor environment humidity is smaller than a second humidity threshold value and the difference value is larger than or equal to a third preset difference value, controlling the dehumidification unit to keep the current state or only operate the regeneration mode;
wherein the second humidity threshold is greater than the first humidity threshold.
10. The dehumidification control method of an air conditioning system with independent temperature and humidity control according to claim 1, further comprising:
judging whether the dehumidification unit meets a stop condition;
when the stop condition is met, controlling the dehumidifying unit to stop running;
wherein the stop condition includes:
the indoor ambient humidity is less than a stop humidity threshold;
the indoor environment humidity is greater than or equal to the stop humidity threshold but smaller than the first humidity threshold, and the running time of the dehumidification unit reaches a second preset time.
CN202010398716.7A 2020-05-12 2020-05-12 Dehumidification control method of temperature and humidity independent control air conditioning system Active CN111578481B (en)

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