WO2020010801A1 - 多联机系统及控制方法 - Google Patents

多联机系统及控制方法 Download PDF

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Publication number
WO2020010801A1
WO2020010801A1 PCT/CN2018/121203 CN2018121203W WO2020010801A1 WO 2020010801 A1 WO2020010801 A1 WO 2020010801A1 CN 2018121203 W CN2018121203 W CN 2018121203W WO 2020010801 A1 WO2020010801 A1 WO 2020010801A1
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WIPO (PCT)
Prior art keywords
unit
indoor unit
water
temperature
heat preservation
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PCT/CN2018/121203
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English (en)
French (fr)
Inventor
胡乾龙
谷月明
孟红武
袁占彪
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珠海格力电器股份有限公司
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Publication of WO2020010801A1 publication Critical patent/WO2020010801A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F24F2005/0025—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using heat exchange fluid storage tanks
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

Definitions

  • the present disclosure relates to the field of air conditioning, and in particular, to a multi-online system and a control method.
  • the multi-connected system is a multi-connected hot and cold water unit.
  • the main mechanism first takes chilled water or hot water, and then sends it to the terminal through a pipe for the user to adjust the temperature of the air.
  • the multi-connected hot and cold water unit has a large number of terminals connected to the host and is heat exchanged with water. Therefore, there is a problem of control delay.
  • One of the objectives of the present disclosure is to propose a multi-online system and a control method for improving comfort in use.
  • a multi-connected system includes: an outdoor unit in which water and refrigerant exchange heat; an indoor unit in which water and air exchange heat to regulate air temperature; and a heat preservation pool for The water flowing from the outdoor unit to the thermal insulation tank is thermally insulated; the thermal insulation tank is in communication with the water outlet end and the water return end of the outdoor unit, and the thermal insulation tank is also in communication with the water inlet end and the water outlet end of the indoor unit.
  • the thermal insulation pool includes a cold storage pool and a heat storage pool.
  • the multi-line system includes a first water pump provided on a pipeline communicating with a water outlet of the outdoor unit and the thermal insulation pool.
  • the multi-line system includes a flow control valve disposed on a pipeline communicating with the water inlet end of the indoor unit and the indoor unit.
  • the multi-line system includes a second water pump provided on a pipeline communicating with the water outlet of the indoor unit and the thermal insulation pool.
  • the multi-line system includes a first temperature sensing element provided in the heat preservation tank for detecting a temperature in the heat preservation tank.
  • the multi-line system includes a second temperature sensing element, which is disposed on a pipeline connecting the water outlet end of the indoor unit and the thermal insulation tank, and is used to measure the outlet water temperature of the indoor unit.
  • the multi-online system includes a control unit for controlling start and stop of the outdoor unit and the indoor unit.
  • the outdoor unit includes at least two main units connected in parallel, the main unit including at least a compressor, a condenser, and an evaporator.
  • the indoor unit includes at least two internal unit terminals connected in parallel, and each of the internal unit terminals is located in a different room or the same room.
  • each of the internal machine terminals is equipped with an on-off valve.
  • Some embodiments of the present disclosure provide a control method of a multi-online system, which includes the following steps:
  • T1 is the first preset temperature value
  • T2 is the second preset temperature value
  • T3 is the third preset temperature value
  • T4 is the fourth preset temperature value
  • the outdoor unit includes more than two host units:
  • each host unit is turned on in turn at the set time interval
  • each host unit will turn off in turn at the set time interval.
  • the value range of T1 is greater than -3 ° C, less than -1 ° C, and / or the value range of T2 is greater than 4 ° C, and less than 6 ° C.
  • each internal unit terminal is independently controllable:
  • T3 ⁇ ⁇ T4 ⁇ T4 the internal unit terminal selected by the user in the indoor unit is kept running, and the closed terminal is kept closed;
  • the value range of T3 is greater than -2 ° C and less than 0 ° C, and / or the value range of T4 is greater than 1 ° C and less than 3 ° C.
  • the real-time flow of the flow control valve is:
  • ⁇ T3 is the rated terminal heat exchange temperature difference
  • Q is all the load output of the outdoor unit.
  • the heat preservation pool is in communication with the water outlet end and the water return end of the outdoor unit; the heat preservation pool is also in communication with the water inlet end and the water outlet end of the indoor unit.
  • the heat preservation pool is used to heat the water flowing from the outdoor unit to the heat preservation pool.
  • the heat preservation pool stabilizes the water temperature of the heat preservation pool at the target value by means of water-to-water heat exchange, and then enters the indoor unit to release it to improve the user's comfort.
  • FIG. 1 is a schematic diagram illustrating a multi-connection system according to some embodiments of the present disclosure
  • FIG. 2 is an exemplary block diagram illustrating a control method of a multi-connection system according to some embodiments of the present disclosure.
  • 1-external water source unit 11-main unit; 12-compressor; 13-four-way valve; 14-condenser; 15-throttle valve; 16-evaporator;
  • FIG. 1 it is a schematic diagram of a multi-connection system provided by some embodiments of the present disclosure.
  • the multi-connected system includes an outdoor unit 1, and water in the outdoor unit 1 exchanges heat with a refrigerant.
  • the outdoor unit 1 includes more than one host unit 11. In some embodiments, the outdoor unit 1 includes at least two host units 11 connected in parallel.
  • the host unit 11 includes at least a compressor 12, a condenser 14, and an evaporator 16, and further includes a four-way valve 13, a throttle valve 15, and the like.
  • the refrigerant circulates between the compressor 12, the condenser 14, and the evaporator 16, and the water in the outdoor unit 1 performs heat exchange with the refrigerant.
  • the multi-connection system includes an indoor unit 2, and the water and air in the indoor unit 2 are heat-exchanged to regulate the indoor air temperature.
  • the indoor unit 2 includes more than one indoor unit terminal 21. In some embodiments, the indoor unit 2 includes at least two internal unit terminals 21 connected in parallel. Each of the internal device terminals 21 can be installed in a different room or in the same room.
  • the internal machine terminal 21 is a fan coil.
  • each internal machine terminal 21 is equipped with an on-off valve 22.
  • the on-off valve 22 is used to control the opening and closing of the corresponding internal terminal 21.
  • the on-off valve 22 may be a solenoid valve.
  • the multi-line system includes a thermal insulation tank 3 for thermally insulating water flowing from the outdoor unit 1 to the thermal insulation tank 3.
  • the thermal insulation pool 3 is in communication with the water outlet end and the water return end of the outdoor unit 1.
  • the thermal insulation pool 3 is also in communication with the water inlet end and the water outlet end of the indoor unit 2.
  • the heat preservation pool 3 stabilizes the water temperature of the heat preservation pool 3 at the target value by means of water-water heat exchange, and then enters the indoor unit 2 for release, and serves as a buffer zone between the outdoor unit 1 and the indoor unit 2 in order to improve user comfort. And the flexibility of the outdoor unit 1.
  • the water exchanged by the outdoor unit 1 flows to the heat preservation pool 3, and flows to the indoor unit 2 through the heat preservation pool 3.
  • the water therein remains Can maintain the temperature of the multi-connected system for a relatively long time, even if the temperature of the water in the thermal insulation tank 3 changes, it changes relatively slowly. Therefore, after the multi-connected system is restarted, the water in the thermal insulation tank 3 can be supplied to the room.
  • Unit 2 achieves the effect of rapid cooling or heating, and improves the end-user comfort.
  • the inlet water temperature of the indoor unit 2 is unstable, and a large part of the outlet air temperature of the indoor unit 2 is determined by its inlet water temperature.
  • the air temperature of the indoor unit 2 is also very unstable. For example: When the user just enters the house, the temperature of the water provided by outdoor unit 1 does not drop due to the multi-connected system just turned on, and the outlet temperature of indoor unit 2 does not drop. The user experience is poor; when the outdoor unit 1 provides After the water temperature drops, the user may not be very hot anymore. At this time, the air temperature of the indoor unit 2 may make the user feel cold and the use comfort is very poor.
  • the multi-connection system in the present disclosure is provided with a thermal insulation pool 3, which is used to provide a stable low-temperature water source, so that the load output of the indoor unit 2 is relatively stable, and the user can enjoy the cool cold wind just after entering the house, which improves Use comfort.
  • the thermal insulation pool 3 includes a cold storage pool and a heat storage pool.
  • thermal insulation pool 3 is a device having cold storage and heat storage functions.
  • the device with cold storage and heat storage functions is used as a buffer component between the outdoor unit 1 and the indoor unit 2, which is beneficial to the flexible matching of the selection and configuration of the outdoor unit 1 and the indoor unit 2; increasing the multi-connection system Configuration flexibility of outdoor unit 1 and indoor unit 2; increase installation cheapness.
  • the multi-connected system includes a first water pump 4, and the first water pump 4 is disposed on a pipeline connecting the water outlet end of the outdoor unit 1 and the heat preservation tank 3.
  • the first water pump 4 is turned on to provide power to pump the water in the outdoor unit 1 into the thermal insulation pool 3.
  • the multi-line system includes a flow control valve 5, and the flow control valve 5 is disposed on a pipeline that communicates with the water inlet end of the indoor unit 2 and the thermal insulation tank 3.
  • the flow control valve 5 is used to control the water flow from the thermal insulation tank 3 to the indoor unit 2.
  • the multi-line system includes a second water pump 6, and the second water pump 6 is disposed on a pipeline connecting the water outlet end of the indoor unit 2 and the thermal insulation tank 3.
  • the second water pump 6 is turned on to provide power to pump the water of the indoor unit 2 into the thermal insulation tank 3.
  • the multi-line system includes a first temperature-sensing element 7, and the first temperature-sensing element 7 is disposed in the heat-retaining pool 3 for detecting the temperature in the heat-retaining pool 3. Further, the first temperature sensing element 7 is a temperature sensor.
  • the multi-line system includes a second temperature sensing element 8, which is disposed on a pipeline connecting the water outlet end of the indoor unit 2 and the thermal insulation tank 3 to measure the water outlet temperature of the indoor unit 2. Further, the second temperature sensing element 8 is a temperature sensor.
  • the multi-online system includes a control unit 9 for controlling the start and stop of the outdoor unit 1 and the indoor unit 2.
  • control unit 9 includes a control motherboard 91 and a display 92, and the control motherboard 91 is connected to the interactive platform display 92.
  • the control main board 91 receives the user's parameter settings in real time, the indoor temperature parameters, the temperature of the heat preservation pool 3 (the temperature of the cold storage pool), controls the water pumps 4, 6, the on-off valve 22 (solenoid valve), and the start of each host unit 11 of the outdoor unit 1. Stop action; and the flow rate of the flow control valve 5.
  • the outdoor unit 1 and the indoor unit 2 are configured with the heat preservation pool 3 as the core.
  • the outdoor unit 1 includes a plurality of host units 11 (two host units 11 are connected as shown in FIG. 1, and the actual number of the host units 11 may be It is determined according to the capacity of the heat preservation tank 3 and the load of the outdoor unit 1), and the start and stop of the outdoor unit 1 and the indoor unit 2 are controlled with the temperature of the heat preservation pool 3 as a target value.
  • the indoor unit 2 includes a plurality of internal unit terminals 21, and a user can set a target indoor temperature and control the start and stop of the internal unit terminal 21.
  • the flow control valve 5 controls the main valve water flow according to the load of the indoor unit 2.
  • the specific control method of the multi-line system is as follows.
  • T1 is the first preset temperature value
  • T2 is the second preset temperature value
  • a control method of a multi-online system in a state where the outdoor unit 1 includes more than two host units 11:
  • each host unit 11 is turned on in turn at a set time interval.
  • the time interval may be 1 minute, but is not limited thereto.
  • each host unit 11 is turned off in sequence at a set time interval.
  • the time interval may be 1 minute, but is not limited thereto.
  • the value of T1 ranges from greater than -3 ° C to less than -1 ° C.
  • the value of T1 is -2 ° C.
  • the value of T2 ranges from more than 4 ° C to less than 6 ° C.
  • the value of T2 is 5 ° C.
  • T3 is the third preset temperature value
  • T4 is the fourth preset temperature value
  • the heat preservation tank 3 and the indoor unit can be made.
  • Water circulation is performed between 2 and this time interval can be determined empirically, for example, it can be 3 minutes. That is, after the multi-online system is started, when this time interval (for example: 3 minutes) is reached, water circulation can be performed between the thermal insulation pool 3 and the indoor unit 2 to detect the indoor temperature.
  • each internal unit terminal 21 is independently controllable. The user may choose to enable one or more of the internal terminal 21.
  • ⁇ T4 ⁇ T4 one or more internal unit terminals 21 selected by the user in the indoor unit 2 are turned on.
  • T3 ⁇ ⁇ T4 ⁇ T4 the internal unit terminal 21 selected by the user in the indoor unit 2 is kept in the open state and kept running, and is kept closed in the closed state.
  • one or more internal terminal 21 selected by the user in the indoor unit 2 is turned off.
  • the value of T3 ranges from greater than -2 ° C to less than 0 ° C.
  • the value of T3 is -1 ° C.
  • the value of T4 ranges from more than 1 ° C to less than 3 ° C.
  • the value of T4 is 2 ° C.
  • the multi-online system provided in some embodiments sets a heat preservation pool 3, supporting facilities, and a set of control methods between the outdoor unit 1 and the indoor unit 2, so that the outdoor unit 1 of the multi-online system can be arbitrarily matched and the load of the indoor unit 2
  • the stable output improves comfort.
  • the outdoor unit 1 can be arbitrarily matched, that is, the outdoor unit 1 can be a water machine, and the communication signal is directly connected to the control system of the thermal insulation pool 3, and the start-stop output of the outdoor unit 1 is controlled with the water temperature of the thermal insulation pool 3 as a target
  • the choice of outdoor unit 1 is very wide, and even without special development of outdoor unit 1, indoor unit 2 can directly use a stable water source, and the water temperature will not fluctuate greatly.
  • the real-time flow of the flow control valve 5 is:
  • ⁇ T3 is the rated terminal heat exchange temperature difference
  • Q is all the load output of the outdoor unit 1.
  • the control method of the multi-online system provided by some embodiments, taking the heat preservation pool 3 as the core, connecting the outdoor unit 1 and the indoor unit 2 has more flexible installation and configuration. There are more options for outdoor unit 1 and indoor unit 2 (as long as the internal unit is a terminal and the external unit is a water unit).
  • the machine terminal 21 inputs a water source with a stable temperature, so that the internal machine terminal 21 always outputs a load to the user in an optimal state, improves the user comfort, realizes the economic operation of the multi-connection system, and reduces the total power consumption of the operation.
  • the multi-online system with cold storage as its core is taken as a specific embodiment to further describe the control method of the multi-online system in detail.
  • the thermal insulation pool 3 in this embodiment is a cold storage pool.
  • the first temperature sensing element 7 provided in the cold storage pool is a temperature sensor, and the temperature sensor detects the temperature of the cold storage pool Ta every 5 seconds (the temperature sensor generally feedbacks data once every 5s, and if there is long-distance data transmission, it is 10s feedback) Primary data);
  • the opening interval of each host unit 11 of the outdoor unit 1 is 1min (this is in the case that the cooling capacity of each host unit 11 is the same, if each host unit The cooling capacity of the unit 11 is different, so the opening interval time is adjusted separately) to reduce the water temperature in the cold storage pool as soon as possible.
  • the value range of ⁇ T1 is determined empirically.
  • the above temperature difference range is the recommended value. Assuming that the target temperature Tb of the cold storage pool is 7 ° C, the temperature Ta of the cold storage pool can be maintained when it runs to 5 ° C to 12 ° C.
  • the existing state of the outdoor unit 1, that is, the host unit 11 that has been turned on remains in operation, and the host unit 11 in the off state remains closed.
  • the water temperature in this range is very cool for users.
  • Tb of the cold storage tank is too high or too low, certain changes can be made.
  • the above 3min is the recommended value. After this time value, the general water system can already achieve the equilibrium water temperature, that is, T1 ⁇ ⁇ T1 ⁇ T2.
  • the target indoor temperature set by the user is Tk.
  • the indoor temperature Ts of each terminal is detected in real time.
  • the indoor temperature Ts can be detected by using a temperature sensor.
  • the temperature sensor detects the indoor temperature Ts every 5 seconds (the temperature sensor generally reports data once every 5s, and if there is long-distance data transmission, it returns data once every 10s).
  • the internal terminal 21 is turned on (the internal terminal 21 is installed indoors, and the start and stop are controlled independently).
  • Each internal machine terminal 21 is independently controlled, and each internal machine terminal 21 is turned on when it reaches condition one ( ⁇ T4 ⁇ 2 ° C (T4)); when it reaches condition two (-1 (T3) ⁇ ⁇ T4 ⁇ 2 ° C (T4)), it is maintained; When condition three is reached (-1 (T3) ⁇ ⁇ T4 ⁇ 2 ° C (T4)), it is turned off.
  • ⁇ T4 is the deviation of indoor temperature control. If the user sets a demand of 26 ° C, the internal terminal 21 will be turned on if it is greater than 28 ° C, and the existing state will be maintained at 25 ° C ⁇ 28 ° C (the internal terminal 21 will be left on and the internal unit will be on when (The terminal 21 is closed but remains closed). In the range of the temperature difference between the upper and lower temperature set by the user, the internal terminal 21 will not be frequently started and stopped, and the user comfort can be guaranteed.
  • the return water temperature Tc on the pipeline connecting the water outlet of the indoor unit 2 and the cold storage tank is detected in real time.
  • a temperature sensor can be used to detect the return water temperature Tc every 5s.
  • the real-time flow control formula of the flow control valve is as follows:
  • ⁇ T3 is the rated terminal heat exchange temperature difference
  • Q is all the load output of the outdoor unit 1.

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Abstract

一种多联机系统，包括室外机组（1），其中水与冷媒换热；室内机组（2），其中水与空气换热以调节空气温度；以及保温池（3），用于对室外机组（1）流向保温池（3）的水保温；保温池（3）与室外机组（1）的出水端和回水端连通，保温池（3）还与室内机组（2）的进水端与出水端连通。还涉及一种多联机系统的控制方法。

Description

多联机系统及控制方法
本申请是以CN申请号为201810744943.3，申请日为2018年7月9日的申请为基 础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及空气调节领域，尤其涉及一种多联机系统及控制方法。
背景技术
多联机系统即多联式冷热水机组，其先由主机制取冷冻水或热水，再将其通过管道输送到终端供用户调节空气的温度。相对于氟系统多联机，多联式冷热水机组由于与主机连接的终端多且为水换热，存在控制延时的问题，其舒适性是技术实现上的一大难题。
发明内容
本公开的其中一个目的是提出一种用于提高使用舒适性的多联机系统及控制方法。
依据本公开的一些实施例的一个方面，多联机系统包括：室外机组，其内水与冷媒换热；室内机组，其内水与空气换热，以调节空气温度；以及保温池，用于对所述室外机组流向所述保温池的水保温；所述保温池与所述室外机组的出水端和回水端连通，所述保温池还与所述室内机组的进水端和出水端连通。
在一些实施例中，所述保温池包括蓄冷池和蓄热池。
在一些实施例中，多联机系统包括第一水泵，设于所述室外机组的出水端与所述保温池连通的管路上。
在一些实施例中，多联机系统包括流量控制阀，设于所述保温池与所述室内机组的进水端连通的管路上。
在一些实施例中，多联机系统包括第二水泵，设于所述室内机组的出水端与所述保温池连通的管路上。
在一些实施例中，多联机系统包括第一感温元件，设于所述保温池，用于检测所述保温池内的温度。
在一些实施例中，多联机系统包括第二感温元件，设于所述室内机组的出水端与所述保温池连通的管路上，用于测量所述室内机组的出水温度。
在一些实施例中，多联机系统包括控制单元，用于控制所述室外机组和所述室内机组的启停。
在一些实施例中，所述室外机组包括至少两个并联的主机单元，所述主机单元至少包括压缩机、冷凝器和蒸发器。
在一些实施例中，所述室内机组包括至少两个并联的内机终端，各所述内机终端设于不同室内或相同室内。
在一些实施例中，每一所述内机终端配备一开关阀。
本公开的一些实施例提供了一种多联机系统的控制方法，其包括以下步骤：
启动多联机系统，在保温池与室外机组之间进行水循环；实时检测保温池的温度Ta，计算△T1＝Ta-Tb，其中，Tb为设定的保温池的目标温度；
如果△T1≥T2；则开启室外机组；
如果T1≤△T1＜T2；则保持室外机组的当前状态；
如果△T1＜T1；则关闭室外机组；
其中，T1为第一预置温度值，T2为第二预置温度值，T1＜T2；
首次使T1≤△T1＜T2后，在保温池与室内机组之间进行水循环；实时检测室内温度Ts，计算△T4＝Ts-Tk，其中，Tk为用户设定的目标温度；
如果△T4≥T4，则开启室内机组；
如果T3≤△T4＜T4，则保持室内机组的当前状态；
如果△T4＜T3，则关闭室内机组；
其中，T3为第三预置温度值，T4为第四预置温度值，T3＜T4。
在一些实施例中，在室外机组包括两个以上主机单元的状态下：
如果△T1≥T2；则各主机单元以设定的时间间隔依次开启；
如果T1≤△T1＜T2；则已开启的主机单元保持运行，处于关闭状态的主机单元则保持关闭；
如果△T1＜T1；则各主机单元以设定的时间间隔依次关闭。
在一些实施例中，T1的取值范围为大于-3℃，小于-1℃，和/或，T2的取值范围为大于4℃，小于6℃。
在一些实施例中，在室内机组包括两个以上内机终端的状态下，各内机终端独立 可控：
如果△T4≥T4，则开启室内机组中用户选择的一个或多个内机终端；
如果T3≤△T4＜T4，则室内机组中用户选择的内机终端处于开启状态的则保持运行，处于关闭状态的则保持关闭；
如果△T4＜T3，则关闭室内机组中用户选择的一个或多个内机终端。
在一些实施例中，T3的取值范围为大于-2℃，小于0℃，和/或，T4的取值范围为大于1℃，小于3℃。
在一些实施例中，在保温池与室内机组的进水端连通的管路上设置流量控制阀；在保温池与室内机组之间进行水循环后，实时检测室内机组的出水端与保温池连通的管路上的回水温度Tc，计算△T2＝Tc-Tb；
流量控制阀的实时流量为：
Figure PCTCN2018121203-appb-000001
其中，△T3为额定终端换热温差，H＝Q*0.143为额定的内机总水流量；Q为室外机组的所有负荷输出量。
根据本公开的实施例的多联机系统，其保温池与室外机组的出水端和回水端连通；保温池还与室内机组的进水端和出水端连通。保温池用于对室外机组流向保温池的水保温。保温池通过水水换热的方式将保温池的水温稳定在目标值，再进入室内机组释放，以提高用户的使用舒适性。
附图说明
图1是示出根据本公开一些实施例的多联机系统的示意图；
图2是示出根据本公开一些实施例的多联机系统的控制方法的示例性框图。
附图中标号说明：
1-水源外机；11-主机单元；12-压缩机；13-四通阀；14-冷凝器；15-节流阀；16-蒸发器；
2-室内机组；21-内机终端；22-开关阀；
3-蓄冷池；
4-第一水泵；
5-流量控制阀；
6-第二水泵；
7-第一感温元件；
8-第二感温元件；
9-控制单元；91-控制主板；92-显示器。
具体实施方式
下面将结合本公开实施例中的附图，对实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本公开的一部分实施例，而不是全部的实施例。基于本公开的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开保护范围的限制。
如图1所示，为本公开一些实施例提供的多联机系统的示意图。
在一些实施例中，多联机系统包括室外机组1，室外机组1内的水与冷媒换热。
在一些实施例中，室外机组1包括一个以上主机单元11。在一些实施例中，室外机组1包括至少两个并联的主机单元11。主机单元11至少包括压缩机12、冷凝器14和蒸发器16，还包括四通阀13和节流阀15等。
在一些实施例中，冷媒在压缩机12、冷凝器14和蒸发器16之间循环流动，室外机组1内的水与冷媒进行换热。
在一些实施例中，多联机系统包括室内机组2，室内机组2内的水与空气换热，以调节室内的空气温度。
在一些实施例中，室内机组2包括一个以上内机终端21。在一些实施例中，室内机组2包括至少两个并联的内机终端21。各内机终端21可选择设于不同室内或相同室内。
在一些实施例中，内机终端21为风机盘管。
在一些实施例中，每一内机终端21配备一开关阀22。开关阀22用于控制其所对应的内机终端21的开启和关闭。在一些实施例中，开关阀22可以为电磁阀。
在一些实施例中，多联机系统包括保温池3，保温池3用于对室外机组1流向保 温池3的水保温。保温池3与室外机组1的出水端和回水端连通。保温池3还与室内机组2的进水端和出水端连通。保温池3通过水水换热的方式将保温池3的水温稳定在目标值，再进入室内机组2释放，作为室外机组1与室内机组2之间的缓冲地带，目的是提高用户的使用舒适性以及室外机组1搭配的灵活性。
在多联机系统工作过程中，室外机组1换热后的水流向保温池3，通过保温池3流向室内机组2，当多联机系统停机后，由于保温池3的保温作用，其内的水依然可以相对长久的保持多联机系统工作时的温度，即使保温池3内的水温变化，也变化的相对较缓慢，因此，当多联机系统再次启动后，可以将保温池3内的水供向室内机组2，达到迅速制冷或制热的效果，提高终端用户的使用舒适性。
进一步来说，在没有设置稳定水温的保温池3的多联机系统中，室内机组2的进水水温是不稳定的，同时室内机组2的出风温度很大一部分决定于其进水温度，因此室内机组2的出风温度也很不稳定。例如：用户刚进屋，最热时，由于多联机系统刚开启，室外机组1提供的水温没有降下来，室内机组2的出风温度没降下去，用户体验很差；当等到室外机组1提供的水温降下来后，可能用户已经不是很热了，此时室内机组2的出风温度可能会使用户感觉到冷，使用舒适性很差。而本公开中的多联机系统中设置了保温池3，保温池3用于提供稳定的低温水源，使室内机组2的负荷输出较稳定，用户刚进屋就能享受到凉爽的冷风，提高了使用舒适性。
在一些实施例中，保温池3包括蓄冷池和蓄热池。
进一步地，保温池3为具有蓄冷和蓄热功能的装置。
在一些实施例中，将具有蓄冷和蓄热功能的装置作为室外机组1与室内机组2之间的缓冲部件，利于实现室外机组1和室内机组2选型配置上的灵活搭配；增大多联机系统的室外机组1和室内机组2的配置灵活性；增大安装便宜性。
在一些实施例中，多联机系统包括第一水泵4，第一水泵4设于室外机组1的出水端与保温池3连通的管路上。第一水泵4开启，提供动力，以将室外机组1内的水泵入保温池3。
在一些实施例中，多联机系统包括流量控制阀5，流量控制阀5设于保温池3与室内机组2的进水端连通的管路上。流量控制阀5用于控制保温池3流向室内机组2的水流量。
在一些实施例中，多联机系统包括第二水泵6，第二水泵6设于室内机组2的出水端与保温池3连通的管路上。第二水泵6开启，提供动力，将室内机组2的水泵入 保温池3。
在一些实施例中，多联机系统包括第一感温元件7，第一感温元件7设于保温池3，用于检测保温池3内的温度。进一步地，第一感温元件7为温度传感器。
在一些实施例中，多联机系统包括第二感温元件8，第二感温元件8设于室内机组2的出水端与保温池3连通的管路上，用于测量室内机组2的出水温度。进一步地，第二感温元件8为温度传感器。
在一些实施例中，多联机系统包括控制单元9，控制单元9用于控制室外机组1和室内机组2的启停。
进一步地，如图2所示，控制单元9包括控制主板91和显示器92，控制主板91连接交互平台显示器92。控制主板91实时接收用户的参数设定，室内温度参数、保温池3温度(蓄冷池温度)，控制水泵4,6、开关阀22(电磁阀)、以及室外机组1的各主机单元11的启停动作；以及流量控制阀5的流量。
在一些实施例中，以保温池3为核心配置室外机组1和室内机组2，室外机组1包括多个主机单元11(图1所示连接两个主机单元11，主机单元11的实际个数可根据保温池3的容量以及室外机组1的负荷来确定)，以保温池3的温度为目标值控制室外机组1和室内机组2的启停。室内机组2包括多个内机终端21，用户可以自行设定室内的目标温度，控制内机终端21的启停。由流量控制阀5根据室内机组2的负荷控制总阀水流量。
多联机系统的具体控制方法如下。
一些实施例提供的多联机系统的控制方法，其包括以下步骤：
启动多联机系统，在保温池3与室外机组1之间进行水循环；实时检测保温池3的温度Ta，计算△T1＝Ta-Tb，其中，Tb为设定的保温池3的目标温度。
如果△T1≥T2；则开启室外机组1。
如果T1≤△T1＜T2；则保持室外机组1的当前状态。
如果△T1＜T1；则关闭室外机组1。
其中，T1为第一预置温度值，T2为第二预置温度值，T1＜T2。
一些实施例提供的多联机系统的控制方法，其在室外机组1包括两个以上主机单元11的状态下：
如果△T1≥T2；则各主机单元11以设定的时间间隔依次开启。在一些实施例中，该时间间隔可以是1分钟，但不限于此。
如果T1≤△T1＜T2；则已开启的主机单元11保持运行，处于关闭状态的主机单元11保持关闭。
如果△T1＜T1；则各主机单元11以设定的时间间隔依次关闭。在一些实施例中，该时间间隔可以是1分钟，但不限于此。
在一些实施例中，T1的取值范围为大于-3℃，小于-1℃。优选地，T1的取值为-2℃。
在一些实施例中，T2的取值范围为大于4℃，小于6℃。优选地，T2的取值为5℃。
一些实施例提供的多联机系统的控制方法，其包括以下步骤：
启动多联机系统，首次使T1≤△T1＜T2后，在保温池3与室内机组2之间进行水循环；实时检测室内温度Ts，计算△T4＝Ts-Tk，其中，Tk为用户设定的室内的目标温度。
如果△T4≥T4，则开启室内机组2。
如果T3≤△T4＜T4，则保持室内机组2的当前状态。
如果△T4＜T3，则关闭室内机组2。
其中，T3为第三预置温度值，T4为第四预置温度值，T3＜T4。
在一些实施例中，启动多联机系统后，需要一定的时间间隔才能使保温池3内的温度达到一定的平衡，即：使T1≤△T1＜T2；此时可以使保温池3与室内机组2之间进行水循环，这个时间间隔可以根据经验确定，例如可以为3分钟。也就是在启动多联机系统后，达到这个时间间隔(例如：3分钟)，即可以使保温池3与室内机组2之间进行水循环，进行室内温度的检测。
一些实施例提供的多联机系统的控制方法，其在室内机组2包括两个以上内机终端21的状态下，各内机终端21独立可控。用户可以选择开启各内机终端21中的一个或多个。
如果△T4≥T4，则开启室内机组2中用户选择的一个或多个内机终端21。
如果T3≤△T4＜T4，则室内机组2中用户选择的内机终端21处于开启状态则保持运行，处于关闭状态则保持关闭。
如果△T4＜T3，则关闭室内机组2中用户选择的一个或多个内机终端21。
在一些实施例中，T3的取值范围为大于-2℃，小于0℃。优选地，T3的取值为-1℃。
在一些实施例中，T4的取值范围为大于1℃，小于3℃。优选地，T4的取值为2℃。
一些实施例提供的多联机系统在室外机组1与室内机组2之间设置保温池3、配套设施以及整套控制方法，这样就能实现多联机系统的室外机组1的随意搭配，以及 室内机组2负荷的稳定输出，提高舒适性。
进一步地，室外机组1的随意搭配，即室外机组1只要是水机就可以，直接将通讯信号接入保温池3的控制系统，以保温池3的水温为目标控制室外机组1的启停输出，室外机组1的选择面很广，甚至不用专门开发室外机组1，室内机组2就可以直接使用稳定水源，水温不会有较大浮动。
一些实施例提供的多联机系统的控制方法，其在保温池3与室内机组2的进水端连通的管路上设置流量控制阀5。在保温池3与室内机组2之间进行水循环后，实时检测室内机组2的出水端与保温池3连通的管路上的回水温度Tc，计算△T2＝Tc-Tb。
流量控制阀5的实时流量为：
Figure PCTCN2018121203-appb-000002
其中，△T3为额定终端换热温差，H＝Q*0.143为额定的内机总水流量；Q为室外机组1的所有负荷输出量。
一些实施例提供的多联机系统的控制方法，以保温池3为核心，连接室外机组1和室内机组2，安装配置更加灵活。室外机组1和室内机组2的可选项增多(只要内机是终端，外机是水机即可)。将用户设置需求与室外机组1的能力输出独立开来，以对各主机单元11实行群控控制，保持保温池3里的水温稳定，灵活处置用户负荷输出需求，使之能够持续不断的对内机终端21输入稳定温度的水源，使内机终端21始终在最佳状态下对用户输出负荷，提高用户使用舒适性，实现多联机系统的经济运行，降低运行总功耗。
下面以蓄冷为核心的多联机系统为具体实施例，进一步详细描述多联机系统的控制方法。该具体实施例中的保温池3为蓄冷池。
1)室外机组1的控制
启动多联机系统；
设定蓄冷池的目标温度Tb；
实时检测蓄冷池的温度Ta；
进一步地，设于蓄冷池的第一感温元件7为温度传感器，温度传感器每5秒检测一次蓄冷池的温度Ta(温度传感器一般是5s反馈一次数据，如果存在远距离数据传递则是10s反馈一次数据)；
实时计算△T1＝Ta-Tb；T1取值-2℃，T2取值5℃。
如果△T1≥5℃(T2)；则开启室外机组1，室外机组1的各主机单元11的开启 间隔为1min(这是在每个主机单元11的制冷量相同的情况下，如果每个主机单元11的制冷量不同，则另行调整开启间隔时间)，以尽快降低蓄冷池内的水温。
如果-2℃(T1)≤△T1＜5℃(T2)；则保持当前状态，已开启的主机单元11保持运行，不在开启剩余主机单元11。
如果△T1＜-2℃(T1)；则关闭室外机组1，室外机组1的各主机单元11的关闭间隔为1min(如果关机过程中，突然又满足条件一，即△T1≥5℃，则不再关主机单元11，而按照条件一动作)。
△T1的取值范围是经验确定，上述温度差值段是推荐值，假设蓄冷池的目标温度Tb＝7℃，那么在实时检测蓄冷池的温度Ta运行到5℃～12℃时，可以保持室外机组1的现有状态，即已开启的主机单元11保持运行，关闭状态的主机单元11保持关闭。
-2℃≤△T1＜5℃，这个范围内的水温对于用户非常凉爽。当然如果蓄冷池的目标温度Tb存在过高或过低的情况，则可以做一定的改动调整。
2)室内机组2的控制
启动多联机系统，首次使T1≤△T1＜T2后，在保温池3与室内机组2之间进行水循环；或者，启动多联机系统3min后，水泵开启，在保温池3与室内机组2之间进行水循环。
上述的3min是推荐值，这个时间值后，一般水路系统已经能够做到平衡水温了，即T1≤△T1＜T2。
用户设定的室内的目标温度为Tk。
实时检测每个终端室内温度Ts。
室内温度Ts的检测可以采用温度传感器，温度传感器每5秒检测一次室内温度Ts(温度传感器一般是5s反馈一次数据，如果存在远距离数据传递则是10s反馈一次数据)。
实时计算△T4＝Ts-Tk。T3取值-1℃，T4取值2℃。
如果△T4≥2℃(T4)，则开启内机终端21(内机终端21安装于室内，独立控制启停)。
如果-1℃(T3)≤△T4＜2℃(T4)，则保持当前状态，内机终端21若已开启则保持运行，内机终端21未开启则保持关闭。
如果△T1＜-1℃(T3)，则关闭内机终端21。
各内机终端21独立控制，各内机终端21达到条件一(△T4≥2℃(T4))就开 启；达到条件二(-1(T3)≤△T4＜2℃(T4))保持；达到条件三(-1(T3)≤△T4＜2℃(T4))关闭。
△T4是室内温度控制偏差，如果用户设定需求26℃，那么大于28℃就开启内机终端21，在25℃～28℃就保持现有状态(内机终端21开启则保持开启，内机终端21关闭则保持关闭)。在用户设定上下3℃温差的范围内，内机终端21不会频繁启停，用户舒适度也能保证。
3)蓄冷池流量的控制
在蓄冷池与室内机组2之间进行水循环后，实时检测室内机组2的出水端与蓄冷池连通的管路上的回水温度Tc。可采用温度传感器每5s检测一次回水温度Tc。
实时计算△T2＝Tc-Tb；
流量控制阀的实时流量控制公式如下：
Figure PCTCN2018121203-appb-000003
其中，△T3为额定终端换热温差，H＝Q*0.143为额定的内机总水流量；Q为室外机组1的所有负荷输出量。
在本公开的描述中，需要理解的是，使用“第一”、“第二”、“第三”等词语来限定零部件，仅仅是为了便于对上述零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本公开保护范围的限制。
最后应当说明的是:以上实施例仅用以说明本公开的技术方案而非对其限制；尽管参照较佳实施例对本公开进行了详细的说明，所属领域的普通技术人员应当理解：依然可以对本公开的具体实施方式进行修改或者对部分技术特征进行等同替换；而不脱离本公开技术方案的精神，其均应涵盖在本公开请求保护的技术方案范围当中。

Claims (17)

  1. 一种多联机系统，其中，包括：
    室外机组(1)，其内的水与冷媒换热；
    室内机组(2)，其内的水与空气换热，以调节空气温度；以及
    保温池(3)，用于对所述室外机组(1)流向所述保温池(3)的水保温；所述保温池(3)与所述室外机组(1)的出水端和回水端连通，所述保温池(3)还与所述室内机组(2)的进水端和出水端连通。
  2. 如权利要求1所述的多联机系统，其中，所述保温池(3)包括蓄冷池和蓄热池。
  3. 如权利要求1所述的多联机系统，其中，包括第一水泵(4)，设于所述室外机组(1)的出水端与所述保温池(3)连通的管路上。
  4. 如权利要求1所述的多联机系统，其中，包括流量控制阀(5)，设于所述保温池(3)与所述室内机组(2)的进水端连通的管路上。
  5. 如权利要求1所述的多联机系统，其中，包括第二水泵(6)，设于所述室内机组(2)的出水端与所述保温池(3)连通的管路上。
  6. 如权利要求1所述的多联机系统，其中，包括第一感温元件(7)，设于所述保温池(3)，用于检测所述保温池(3)内的温度。
  7. 如权利要求1所述的多联机系统，其中，包括第二感温元件(8)，设于所述室内机组(2)的出水端与所述保温池(3)连通的管路上，用于测量所述室内机组(2)的出水温度。
  8. 如权利要求1所述的多联机系统，其中，包括控制单元(9)，用于控制所述室外机组(1)和所述室内机组(2)的启停。
  9. 如权利要求1所述的多联机系统，其中，所述室外机组(1)包括至少两个并联的主机单元(11)，所述主机单元(11)至少包括压缩机(12)、冷凝器(14)和蒸发器(16)。
  10. 如权利要求1所述的多联机系统，其中，所述室内机组(2)包括至少两个并联的内机终端(21)，各所述内机终端(21)设于不同室内或相同室内。
  11. 如权利要求10所述的多联机系统，其中，每一所述内机终端(21)配备一开关阀(22)。
  12. 一种如权利要求1所述的多联机系统的控制方法，其中，
    启动多联机系统，在保温池(3)与室外机组(1)之间进行水循环；实时检测保温池(3)的温度Ta，计算△T1＝Ta-Tb，其中，Tb为设定的保温池(3)的目标温度；
    如果△T1≥T2；则开启室外机组(1)；
    如果T1≤△T1＜T2；则保持室外机组(1)的当前状态；
    如果△T1＜T1；则关闭室外机组(1)；
    其中，T1为第一预置温度值，T2为第二预置温度值，T1＜T2；
    首次使T1≤△T1＜T2后，在保温池(3)与室内机组(2)之间进行水循环；实时检测室内温度Ts，计算△T4＝Ts-Tk，其中，Tk为用户设定的目标温度；
    如果△T4≥T4，则开启室内机组(2)；
    如果T3≤△T4＜T4，则保持室内机组(2)的当前状态；
    如果△T4＜T3，则关闭室内机组(2)；
    其中，T3为第三预置温度值，T4为第四预置温度值，T3＜T4。
  13. 如权利要求12所述的多联机系统的控制方法，其中，在室外机组(1)包括两个以上主机单元(11)的状态下：
    如果△T1≥T2；则各主机单元(11)以设定的时间间隔依次开启；
    如果T1≤△T1＜T2；则已开启的主机单元(11)保持运行，处于关闭状态的主机单元(11)则保持关闭；
    如果△T1＜T1；则各主机单元(11)以设定的时间间隔依次关闭。
  14. 如权利要求12所述的多联机系统的控制方法，其中，T1的取值范围为大于-3℃，小于-1℃，和/或，T2的取值范围为大于4℃，小于6℃。
  15. 如权利要求12所述的多联机系统的控制方法，其中，在室内机组(2)包括两个以上内机终端(21)的状态下，各内机终端(21)独立可控：
    如果△T4≥T4，则开启室内机组(2)中用户选择的一个或多个内机终端(21)；
    如果T3≤△T4＜T4，则室内机组(2)中用户选择的内机终端(21)处于开启状态的则保持运行，处于关闭状态的则保持关闭；
    如果△T4＜T3，则关闭室内机组(2)中用户选择的一个或多个内机终端(21)。
  16. 如权利要求12所述的多联机系统的控制方法，其中，T3的取值范围为大于-2℃，小于0℃，和/或，T4的取值范围为大于1℃，小于3℃。
  17. 如权利要求12所述的多联机系统的控制方法，其中，在保温池(3)与室内机组(2)的进水端连通的管路上设置流量控制阀(5)；在保温池(3)与室内机组(2)之间进行水循环后，实时检测室内机组(2)的出水端与保温池(3)连通的管路上的回水温度Tc，计算△T2＝Tc-Tb；
    流量控制阀(5)的实时流量为：
    Figure PCTCN2018121203-appb-100001
    其中，△T3为额定终端换热温差，H＝Q*0.143为额定的内机总水流量；Q为室外机组(1)的所有负荷输出量。
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