CN110500734B - Water multi-split air conditioning system and control method thereof - Google Patents

Water multi-split air conditioning system and control method thereof Download PDF

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Publication number
CN110500734B
CN110500734B CN201910629446.3A CN201910629446A CN110500734B CN 110500734 B CN110500734 B CN 110500734B CN 201910629446 A CN201910629446 A CN 201910629446A CN 110500734 B CN110500734 B CN 110500734B
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air conditioning
water
conditioning system
temperature
water temperature
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CN110500734A (en
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何林
耿媛媛
张世航
卢浩贤
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F24F11/50—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
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

Abstract

A water multi-split air conditioning system and a control method thereof are disclosed, wherein in the starting stage of the air conditioning system, before the water temperature of a waterway system reaches a certain fixed temperature, an air coil valve is closed, and water is not introduced into a fan coil to realize cold air prevention and hot air prevention; and in the starting stage, the air disc water valve is closed, so that the energy loss caused by water flowing to the heat exchanger of the indoor unit is reduced, and the rapid heating and cooling are realized. In addition, by adding a compensation value to the water temperature, namely in the heating process, when the current water temperature exceeds the target water temperature by 2 ℃, the air disc water valve is opened; in the refrigeration process, when the current water temperature is lower than the target water temperature by 2 ℃, the air disc water valve is opened; through the arrangement, the comfort of the human body is improved.

Description

Water multi-split air conditioning system and control method thereof
Technical Field
The invention relates to a water online air conditioning system and a control method thereof, in particular to a water online air conditioning system and a control method thereof.
Background
Traditional household water machine function is ageing, and interior outer quick-witted unable linkage just refrigerates or heats through providing a fixed temperature, and the travelling comfort is relatively poor, and the operation process is unscientific, and energy-conservation nature is relatively poor, and especially bad use habit causes the emergence of above-mentioned condition more easily. According to the indoor room load demand of a user, the water machine capable of realizing linkage of the internal machine and the external machine has stronger product competitiveness than the traditional household water machine incapable of linkage, has comfortable air conditioning capacity comparable to that of a fluorine multi-split air conditioner, and has the advantages of high matching ratio, no excessive refrigeration and dehumidification, comfortable floor heating and the like.
The water machine comprises a water online air conditioning system and a water online air conditioning system, wherein the water online air conditioning system is formed by connecting an indoor unit and an outdoor unit through a water system, and a plurality of indoor units of the water online air conditioning system are connected with the outdoor unit through the water system. The water machine sets a control system terminal on the indoor machine, controls the output of the outdoor machine according to the requirements of the indoor machine and gives the most needed inlet water temperature to the indoor machine; the indoor unit is responsible for adjusting air volume. Therefore, the control operation of the water multi-connected unit is realized. Namely, the control system of the water multi-split air conditioning system is a system for carrying out air disc tail end joint control on the basis of the traditional household air conditioner so as to realize better control effect. When the existing water online air conditioning system is started, because the water temperature does not reach the set temperature, the fan of the indoor unit starts to operate, and the user experience is poor easily.
Disclosure of Invention
In view of the above, the invention provides a control method and a device for an online air conditioning system, which adds a cold-proof and hot-air control method at the initial stage of starting the water multi-online air conditioning system, avoids cold air blown out by an air disc at the starting stage, and improves the comfort experience of human bodies; the quick heating or refrigerating is realized by closing the air disc water valve in the starting stage and the high-frequency operation of the compressor; the start-up stage carries out temperature compensation control, promotes human comfortable nature and experiences.
Specifically, the method comprises the following steps:
a control method of a water online air conditioning system comprises an indoor unit, an outdoor unit and a waterway system for realizing heat transmission between the indoor unit and the outdoor unit, wherein the indoor unit comprises a fan coil arranged on the waterway system and an air coil water valve for controlling the fan coil, the outdoor unit comprises a compressor, and the method comprises the following steps:
s01: starting up;
s02: the air coil water valve of the indoor unit is kept closed;
s03: setting target water temperature T of waterway systemW；
S04: detect waterway system's current temperature TDCalculating the current water temperature TDWith target water temperature TWComparing the absolute value delta T with a first preset temperature difference to obtain a first comparison result;
s05: controlling a compressor of the air conditioning system to operate in a corresponding preset frequency band according to the first comparison result;
s06: after the compressor operates for a first preset time or the current water temperature TDWhen the first preset water temperature value is reached, the air disc water valve is opened; otherwise, return to the initial step of step S04.
Preferably, the first preset temperature difference comprises at least two temperature difference range intervals, and the first comparison result is that: and judging the temperature difference range interval to which the absolute value delta T belongs.
Preferably, in step S04, the first preset temperature difference includes three temperature range sections, and the boundary points of the three temperature range sections are t1 and t2, where t1< t2, and the three temperature range sections are respectively: the temperature difference control system comprises a first temperature difference interval Tq1, a second temperature difference interval Tq2 and a third temperature difference interval Tq3, wherein Tq1 is less than t1, t1 is less than Tq2<, t2, t2 is less than Tq3, t1 is a first set temperature difference, and t2 is a second set temperature difference.
Preferably, the corresponding preset frequency band in step S05 includes at least two frequency range sections.
Preferably, in step S05, the corresponding preset frequency band includes three frequency range sections, and the demarcation points of the three frequency range sections are F1, F2, F3, and F4, where F1< F2< F3< F4, and the three frequency range sections are: a first frequency range section Fq1, a second frequency range section Fq2 and a third frequency range section Fq1, wherein F1 ═ Fq1< F2, F2 ═ Fq2 ═ F3, F3< Fq3< ═ F4, where F1 is a first set frequency, F2 is a second set frequency, F3 is a third set frequency, and F4 is a fourth set frequency.
Preferably, a target water temperature T of the waterway system is setWThe method comprises the following steps: according to the set conditions when the air conditioning system is started, the control system of the air conditioning system determines the load of the air conditioning system, and sets the target water temperature T according to the loadW。
Preferably, when the air conditioning system is in the heating process, the first preset water temperature value is equal to the target water temperature TW+ a first threshold; when the air conditioning system is in the refrigeration process, the first preset water temperature value is equal to the target water temperature TW-a second threshold value.
Preferably, the first threshold and the second threshold are both 2 ℃.
Preferably, the water online air conditioning system is a water online air conditioning system.
In addition, the invention also provides a water on-line air conditioning system, which is characterized in that: the air conditioning system adopts the control method of the invention.
The invention realizes 'fast heating' and 'fast refrigeration' by the fast heating and refrigeration mode of the starting stage; and the human body comfort experience of the starting stage of the water multi-split air conditioning system is further improved through cold air prevention, hot air control and water temperature compensation control.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
Fig. 1 is a schematic control flow diagram of a water multi-split air conditioning system according to the present invention.
Fig. 2 is a schematic view of an operating frequency of a compressor of the water multi-split air conditioning system according to the present invention.
Fig. 3 is a schematic diagram illustrating a relationship between temperature and temperature differences of water in the multi-split air conditioning system.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus, a repetitive description thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and so forth. In other instances, well-known methods, devices, implementations, or operations have not been shown or described in detail to avoid obscuring aspects of the disclosure.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various structures, these structures should not be limited by these terms. These terms are used to distinguish one structure from another structure. Thus, a first structure discussed below may be termed a second structure without departing from the teachings of the disclosed concept. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It is to be understood by those skilled in the art that the drawings are merely schematic representations of exemplary embodiments, and that the blocks or processes shown in the drawings are not necessarily required to practice the present disclosure and are, therefore, not intended to limit the scope of the present disclosure.
The following detailed description of embodiments of the invention is provided in conjunction with the accompanying figures 1-3:
a control method of a water online air conditioning system comprises an indoor unit, an outdoor unit and a waterway system for realizing heat transmission between the indoor unit and the outdoor unit, wherein the indoor unit comprises a fan coil arranged on the waterway system and an air coil water valve for controlling the fan coil, and the outdoor unit comprises a compressor, and is characterized in that: the method comprises the following steps:
s01: starting up;
s02: the air coil water valve of the indoor unit is kept closed;
s03: setting target water temperature T of waterway systemW；
S04: detect waterway system's current temperature TDCalculating the current water temperature TDWith target water temperature TWComparing the absolute value delta T with a first preset temperature difference to obtain a first comparison result;
s05: controlling a compressor of the air conditioning system to operate in a corresponding preset frequency band according to the first comparison result;
s06: after the compressor operates for a first preset time or the current water temperature TDWhen the first preset water temperature value is reached, the air disc water valve is opened; otherwise, return to the initial step of step S04.
Preferably, the first preset temperature difference comprises at least two temperature difference range intervals, and the first comparison result is that: and judging the temperature difference range interval to which the absolute value delta T belongs.
Preferably, in step S04, the first preset temperature difference includes three temperature range sections, and the boundary points of the three temperature range sections are t1 and t2, where t1< t2, and the three temperature range sections are respectively: the temperature difference control system comprises a first temperature difference interval Tq1, a second temperature difference interval Tq2 and a third temperature difference interval Tq3, wherein Tq1 is less than t1, t1 is less than Tq2<, t2, t2 is less than Tq3, t1 is a first set temperature difference, and t2 is a second set temperature difference.
Preferably, the corresponding preset frequency band in step S05 includes at least two frequency range sections.
Preferably, in step S05, the corresponding preset frequency band includes three frequency range sections, and the demarcation points of the three frequency range sections are F1, F2, F3, and F4, where F1< F2< F3< F4, and the three frequency range sections are: a first frequency range section Fq1, a second frequency range section Fq2 and a third frequency range section Fq1, wherein F1 ═ Fq1< F2, F2 ═ Fq2 ═ F3, F3< Fq3< ═ F4, where F1 is a first set frequency, F2 is a second set frequency, F3 is a third set frequency, and F4 is a fourth set frequency.
Preferably, a target water temperature T of the waterway system is setWThe method comprises the following steps: according to the set conditions when the air conditioning system is started, the control system of the air conditioning system determines the load of the air conditioning system, and sets the target water temperature T according to the loadW。
Preferably, when the air conditioning system is in the heating process, the first preset water temperature value is equal to the target water temperature TW+ a first threshold; when the air conditioning system is in the refrigeration process, the first preset water temperature value is equal to the target water temperature TW-a second threshold value.
Preferably, the first threshold and the second threshold are both 2 ℃.
Preferably, the water online air conditioning system is a water online air conditioning system.
Preferably, the starting is realized by a controller, preferably a remote controller, according to the set conditions of the controller, the control system of the air conditioning system determines the load of the air conditioning system, and the target water temperature T is set according to the loadW
In addition, the invention also provides a water on-line air conditioning system, and the air conditioning system adopts the control method.
The principles and processes of the present invention are described below in conjunction with FIGS. 1-3:
the water multi-split air conditioning system of the present invention includes, but is not limited to, the following components: the air conditioner comprises at least one outdoor unit, at least one cold and hot water generator, N indoor units and N fan coils, wherein N is 2, N is a natural number, each fan coil comprises at least one environment temperature sensing bulb, at least one water inlet temperature sensing bulb and N air coil water valves, and the controllers are preferably N controllers. The N indoor units are respectively installed in N different rooms.
In order to better explain the control method of the water multi-split air conditioning system in the following, the following description is made for the parameters involved in the air conditioning system and the control: target water temperature TMAccording to the set temperature of the controller, the control system of the water on-line air conditioning system calculates the target water temperature T of the water path system according to the load requirement of the air conditioning systemM. Current water temperature TD，It is waterReal-time water temperature at the water valve of the road system or the air plate, water temperature difference △ T being target water temperature TMCurrent water temperature TD(ii) a Compressor operating frequency: f1 is the first setting frequency, F2 is the second setting frequency, F3 is the third setting frequency, F4 is the fourth setting frequency, wherein F1And F4Respectively, the lowest and highest operating frequencies, F2And F3The first and second demarcation points are the first and second demarcation points of the operating frequency, respectively, and the relationship diagram is shown in fig. 2. t1 is the first set point temperature difference, and t2 is the second set point temperature difference, the relationship diagram is shown in FIG. 3.
The specific control process of the system is as follows:
(1) starting up the controller;
(2) when the air conditioning system is started, the air disc enters cold air prevention control, namely the water valve is kept closed, and the indoor fan is not started, so that the heat loss caused by water flowing through the air disc is reduced, the time for the water temperature to reach the target water temperature is shortened, and the rapid rise of the water temperature is realized;
(3) the system calculates a target water temperature T according to the room load demandM；
(4) Detect waterway system's current temperature TDCalculating the current water temperature TDWith target water temperature TWComparing the absolute value delta T with a first preset temperature difference to obtain a first comparison result;
(5) controlling a compressor of the air conditioning system to operate in a corresponding preset frequency band according to the first comparison result;
when the absolute value Δ T < T1, the operating frequency F of the compressor satisfies: f is not less than F1 and less than F2;
when the absolute value delta T is not less than T1 and not more than T2, the operating frequency F of the compressor satisfies the following conditions: f is not less than F2 and not more than F3;
and when the absolute value delta T is larger than T2, the running frequency F of the compressor satisfies the following conditions: f is more than F3 and less than or equal to F4;
(6) in the heating process, if the current water temperature T isDTarget Water temperature TW>When the first threshold value is equal to the first threshold value, the air disc water valve is opened; in the refrigerating process, the target water temperature TWCurrent water temperature TD>When the second threshold value is satisfied, or the compressor is operatedAfter the first preset time, the air disc water valve is opened; otherwise, returning to the initial step of the step (4);
(7) the indoor unit starts to operate, and the air conditioning system enters normal control.
Wherein the first threshold value and the second threshold value are preferably 2 ℃. Through the steps, the water temperature can quickly reach the target water temperature TMHowever, in order to better ensure user comfort, the target water temperature T cannot be reached at the water temperatureMThen the air disk is started immediately, and in the heating process, the current water temperature T is required to be ensuredDTarget Water temperature TMThe temperature is more than or equal to 2 ℃, namely when the temperature compensation condition of water temperature adjustment is met or the first preset time X min of compressor operation is met, the cold air prevention control is quitted, and in the refrigerating process, the target water temperature T is required to be enabledMCurrent water temperature TDAnd the temperature is more than or equal to 2 ℃, namely when the temperature compensation condition of water temperature adjustment is met or the first preset time Xmin of the operation of the compressor is met, the cold air prevention control air disc water valve is withdrawn to open, the indoor fan is simultaneously opened, and the temperature of water introduced into the air disc is lower at the moment, so that the room can be rapidly reduced, and the rapid refrigeration is realized.
In the starting stage of the air conditioning system, the water valve is closed before the water temperature reaches a certain fixed temperature, and cold and hot air can be prevented without introducing water into the fan coil; and in the starting stage, the water valve is closed, the energy loss caused by water flowing to the heat exchanger of the indoor unit is reduced, the rapid heating and cooling are realized, and the comfort of a human body is improved by increasing the compensation value of the water temperature.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (10)

1. A control method of a water online air conditioning system comprises an indoor unit, an outdoor unit and a waterway system for realizing heat transmission between the indoor unit and the outdoor unit, wherein the indoor unit comprises a fan coil arranged on the waterway system and an air coil water valve for controlling the fan coil, and the outdoor unit comprises a compressor, and is characterized in that: the method comprises the following steps:
s01: starting up;
s02: the air coil water valve of the indoor unit is kept closed;
s03: setting target water temperature T of waterway systemW；
S04: detect waterway system's current temperature TDCalculating the current water temperature TDWith target water temperature TWComparing the absolute value delta T with a first preset temperature difference to obtain a first comparison result;
s05: controlling a compressor of the air conditioning system to operate in a corresponding preset frequency band according to the first comparison result;
s06: after the compressor operates for a first preset time or the current water temperature TDWhen the first preset water temperature value is reached, the air disc water valve is opened; otherwise, return to the initial step of step S04.
2. The control method according to claim 1, characterized in that: the first preset temperature difference comprises at least two temperature difference range intervals, and the first comparison result means that: and judging the temperature difference range interval to which the absolute value delta T belongs.
3. The control method according to claim 2, characterized in that: in step S04, the first preset temperature difference includes three temperature range intervals, the boundary points of the three temperature range intervals are t1 and t2, where t1 is less than t2, and the three temperature range intervals are: a first temperature difference interval Tq1, a second temperature difference interval Tq2 and a third temperature difference interval Tq3, wherein Tq1< t1, t1= < Tq2< = t2, t2< Tq3, wherein t1 is a first set temperature difference, and t2 is a second set temperature difference.
4. The control method according to any one of claims 1 to 3, characterized in that: the corresponding preset frequency band in step S05 includes at least two frequency range intervals.
5. The control method of claim 4, wherein in step S05, the corresponding preset frequency band comprises three frequency range sections, and the demarcation points of the three frequency range sections are F1, F2, F3 and F4, wherein F1< F2< F3< F4, and the three frequency range sections are respectively: a first frequency range section Fq1, a second frequency range section Fq2 and a third frequency range section Fq1, wherein F1= < Fq1< F2, F2= < Fq 2= F3, F3< Fq3 = F4, where F1 is a first set frequency, F2 is a second set frequency, F3 is a third set frequency, and F4 is a fourth set frequency.
6. The control method according to any one of claims 1 to 3, 5, characterized in that: setting target water temperature T of waterway systemWThe method comprises the following steps: according to the set conditions when the air conditioning system is started, the control system of the air conditioning system determines the load of the air conditioning system, and sets the target water temperature T according to the loadW。
7. The control method according to any one of claims 1 to 3, 5, characterized in that: when the air conditioning system is in a heating process, the first preset water temperature value = the target water temperature TW+ a first threshold value, and when the air conditioning system is in the refrigerating process, the first preset water temperature value = the target water temperature TW-a second threshold value.
8. The control method according to claim 7, characterized in that: the first threshold and the second threshold are both 2 ℃.
9. The control method according to any one of claims 1 to 3, 5, and 8, characterized in that: the water on-line air conditioning system is a water on-line air conditioning system.
10. A water on-line air conditioning system is characterized in that: the air conditioning system employs the control method of any one of claims 1 to 9.
CN201910629446.3A 2019-07-12 2019-07-12 Water multi-split air conditioning system and control method thereof Active CN110500734B (en)

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CN111140984A (en) * 2019-12-30 2020-05-12 珠海格力电器股份有限公司 Water multi-connected central air conditioner control method, computer readable storage medium and air conditioner
CN111219858B (en) * 2020-01-07 2021-05-14 珠海格力电器股份有限公司 Multistage electric auxiliary heating water multi-connected air conditioner cold air prevention control method and system and air conditioner
CN112303807A (en) * 2020-10-27 2021-02-02 广东Tcl智能暖通设备有限公司 Compressor loading control method, multi-split system and storage medium
CN114279066B (en) * 2021-12-10 2023-04-14 珠海格力电器股份有限公司 Control method and device of household water machine and air conditioning system

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CN103388856B (en) * 2013-07-18 2015-09-30 广东美的暖通设备有限公司 Multi-online air-conditioning system and start heating method fast
CN104864572A (en) * 2015-06-08 2015-08-26 珠海格力电器股份有限公司 Air conditioner control method and device
CN105650834B (en) * 2016-04-05 2018-10-02 珠海格力电器股份有限公司 A kind of control method of double anti-cold wind of heat source air conditioner unit
CN107120799B (en) * 2017-05-23 2020-07-07 青岛海尔空调电子有限公司 Multi-split control method and system for water system
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