WO2021169146A1 - 新风换热机组及其控制方法 - Google Patents

新风换热机组及其控制方法 Download PDF

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Publication number
WO2021169146A1
WO2021169146A1 PCT/CN2020/101559 CN2020101559W WO2021169146A1 WO 2021169146 A1 WO2021169146 A1 WO 2021169146A1 CN 2020101559 W CN2020101559 W CN 2020101559W WO 2021169146 A1 WO2021169146 A1 WO 2021169146A1
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Prior art keywords
air
unit
heat exchange
heat
indoor
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PCT/CN2020/101559
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English (en)
French (fr)
Inventor
罗建文
毛守博
王春刚
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青岛海尔空调电子有限公司
海尔智家股份有限公司
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Publication of WO2021169146A1 publication Critical patent/WO2021169146A1/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required 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
    • F24F2110/50—Air quality properties
    • F24F2110/65—Concentration of specific substances or contaminants
    • F24F2110/70—Carbon dioxide

Definitions

  • the invention belongs to the field of heat exchange technology, and specifically provides a fresh air heat exchange unit and a control method thereof.
  • the existing air-conditioning units not only require high equipment costs, but also have problems such as troublesome installation and large space occupation.
  • the compressor in the fresh air system will generate a lot of noise when working, which will cause a problem of poor user experience.
  • this field needs a new fresh air heat exchange unit and its control method to solve the above problems.
  • the present invention provides a fresh air heat exchange unit, It is characterized in that the fresh air heat exchange unit includes an outdoor unit, a heat exchange unit, an indoor unit, and an air processing unit, the indoor unit can exchange heat with indoor air, and the outdoor unit can exchange heat with the indoor unit in the Heat exchange is realized in the heat exchange unit, the air processing unit can process outdoor air and send it indoors, the air processing unit is provided with a dehumidification evaporator, and the dehumidification evaporator is connected to the outdoor unit so that the The refrigerant in the outdoor unit can flow into the dehumidification evaporator, thereby dehumidifying the introduced air.
  • a first heat exchanger is further arranged in the air processing unit, and the first heat exchanger is arranged upstream of the dehumidification evaporator, and the first heat exchanger
  • the exchanger is connected with the indoor unit so that the heat exchange medium in the indoor unit can flow into the first heat exchanger, so as to cool the air before dehumidification for the first time.
  • a second heat exchanger is further provided in the air processing unit, the second heat exchanger is provided downstream of the dehumidification evaporator, and the second heat exchange The device is used to heat up the dehumidified air.
  • the inlet of the second heat exchanger is connected to the outlet of the first heat exchanger so that the heat exchange medium flowing out of the first heat exchanger can flow into In the second heat exchanger, the dehumidified air is thus heated.
  • the air processing unit includes an air inlet, the air inlet is communicated with the outdoor, and a fresh air valve is provided at the air inlet, and the fresh air valve is used to control the The opening and closing state of the air inlet.
  • the air processing unit further includes a return air port, which is communicated with the room, so as to introduce the indoor air into the air processing unit and mix with the outdoor air before being sent into indoor.
  • a radiant heat exchanger is provided in the indoor unit, and the indoor unit exchanges heat with indoor air through the radiant heat exchanger.
  • the present invention also provides a control method for a fresh air heat exchange unit.
  • the fresh air heat exchange unit includes an outdoor unit, a heat exchange unit, an indoor unit, and an air processing unit.
  • the indoor unit can exchange heat with indoor air
  • the outdoor unit can exchange heat with the indoor unit in the heat exchange unit
  • the air processing unit can process outdoor air and send it indoors
  • the air processing unit is provided with a dehumidification evaporator
  • the dehumidification evaporator is connected to the outdoor unit so that the refrigerant in the outdoor unit can flow into the dehumidification evaporator to dehumidify the introduced air.
  • the air processing unit includes an air inlet and a return air outlet, so The air inlet is connected to the outdoor, and the return air is connected to the room, so that the indoor air is introduced into the air processing unit and mixed with the outdoor air before being sent to the room;
  • the control method includes: obtaining the indoor carbon dioxide concentration; According to the carbon dioxide concentration, the opening and closing state of the air inlet is controlled.
  • the step of "controlling the opening and closing state of the air inlet according to the carbon dioxide concentration” specifically includes: if the carbon dioxide concentration is less than or equal to a preset concentration, controlling the air inlet Closed; and/or, if the carbon dioxide concentration is greater than the preset concentration, control the air inlet to open.
  • the step of "controlling the opening of the air inlet” specifically includes: controlling the opening degree of the air inlet according to the difference between the carbon dioxide concentration and the preset concentration.
  • the fresh air heat exchange unit of the present invention includes an outdoor unit, a heat exchange unit, an indoor unit, and an air processing unit.
  • the indoor unit can exchange heat with indoor air so as to Effectively ensure the heat exchange effect of the fresh air heat exchange unit.
  • the outdoor unit can exchange heat with the indoor unit in the heat exchange unit.
  • the air processing unit can process the outdoor air and send it indoors.
  • the air processing unit is equipped with a dehumidification evaporator to dehumidify
  • the evaporator is connected to the outdoor unit, so that the refrigerant in the outdoor unit can flow into the dehumidification evaporator, thereby dehumidifying the introduced air, so that the fresh air heat exchange unit can have the fresh air function.
  • the outdoor unit in this application can not only interact with The indoor unit exchanges heat in order to effectively ensure the heat exchange function of the fresh air heat exchange unit, and can also supply refrigerant to the dehumidification evaporator in the air processing unit, so as to effectively ensure the dehumidification function of the fresh air heat exchange unit, that is, through an outdoor unit It can ensure the heat exchange effect and dehumidification effect of the fresh air heat exchange unit at the same time, thereby effectively reducing equipment costs, reducing the occupied space, simplifying the installation process, and effectively reducing the noise generated by the air processing unit when it is working, so as to effectively improve the user experience. .
  • Figure 1 is a schematic diagram of the overall structure of the fresh air heat exchange unit of the present invention.
  • the terms “left”, “right”, “front”, “rear”, “inner”, “outer” and other terms indicating the direction or positional relationship are based on the appendix The direction or position relationship shown in the figure is only for ease of description, and does not indicate or imply that the device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
  • the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
  • connection should be interpreted broadly, for example, they may be directly connected or indirectly through an intermediary.
  • the connection can also be the connection between the two components.
  • the fresh air heat exchange unit includes an outdoor unit 1, a heat exchange unit 2, an indoor unit 3, and an air processing unit 4.
  • the indoor unit 3 can exchange heat with indoor air to achieve a heat exchange effect.
  • Unit 1 can exchange heat with indoor unit 3 in heat exchange unit 2.
  • Outdoor unit 1 continuously exchanges heat with outdoor air, and then exchanges heat with indoor unit 3, so that indoor unit 3 can continuously deliver cold or heat
  • the air processing unit 4 can process the outdoor air and send it indoors, so as to realize the fresh air function.
  • the air processing unit 4 is provided with a dehumidification evaporator 41, which is connected to the outdoor unit 1 so that the air in the outdoor unit 1
  • the refrigerant can flow into the dehumidification evaporator 41, thereby dehumidifying the introduced air.
  • the heat exchange function can supply refrigerant to the dehumidification evaporator 41 to achieve the dehumidification function.
  • the indoor unit 3 and the air processing unit 4 can share the same outdoor unit 1 to achieve corresponding functions.
  • the present invention does not impose any limitation on the specific type of the dehumidification evaporator 41, as long as the air processing unit 4 can achieve the dehumidification function through the dehumidification evaporator 41.
  • a heat exchange branch is provided in the outdoor unit 1, and the heat exchange branch is provided with a compressor 11, a gas-liquid separator 12, a four-way valve 13, an outdoor heat exchanger 14 and an outdoor expansion valve 15, wherein ,
  • the port s of the four-way valve 13 is connected with the inlet of the gas-liquid separator 12, the outlet of the gas-liquid separator 12 is connected with the inlet of the compressor 11, and the port d of the four-way valve 13 is connected with the outlet of the compressor 11.
  • the port c of the valve 13 is connected to the outdoor heat exchanger 14, and the end of the outdoor heat exchanger 14 away from the four-way valve 13 is connected to the outdoor expansion valve 15.
  • the outdoor heat exchanger 14 can exchange heat with outdoor air in order to change the The temperature of the refrigerant in the heat exchange branch; of course, it should be noted that the present invention does not impose any restrictions on the specific structure of the outdoor unit 1, as long as the outdoor unit 1 can exchange heat with outdoor air to change the temperature of the refrigerant.
  • the refrigerant pipe located at the end of the outdoor expansion valve 15 far away from the outdoor heat exchanger 14 can extend outward to the heat exchange unit 2 to exchange heat with the indoor unit 3, and then connect to the e port of the four-way valve 13, thereby The circulation of the refrigerant is realized; a heat exchange expansion valve 22 is provided in the heat exchange unit 2, and the heat exchange expansion valve 22 is arranged on the side of the outdoor expansion valve 15 away from the outdoor heat exchanger 14 to control the flow of refrigerant in the pipeline.
  • the indoor unit 3 is provided with a ceiling radiant heat exchanger 31 and a floor radiant heat exchanger 33 to exchange heat with indoor air.
  • radiant heat exchange does not need to rely on fans to achieve heat exchange like ordinary indoor coil heat exchange. It only radiates cold or heat to the room by means of capillary tube or floor heating tube radiation, so as to achieve constant temperature and static. Effect in order to further enhance the user experience.
  • the ceiling radiation heat exchanger 31 is provided with a ceiling radiation solenoid valve 32 at the entrance end to control the heat exchange capacity of the ceiling radiation heat exchanger 31;
  • the floor radiation heat exchanger 33 is provided with a floor radiation solenoid valve 34 at the entrance end to control the floor The heat exchange capacity of the radiant heat exchanger 33.
  • the present invention does not impose any restrictions on the specific number and types of radiant heat exchangers provided in the indoor unit 3, and technicians can set them according to actual use requirements.
  • the heat exchange unit 2 is provided with a water-fluorine heat exchanger 21, and the refrigerant in the outdoor unit 1 and the heat exchange medium in the indoor unit 3 can exchange heat in the water-fluorine heat exchanger 21; of course, although this is preferred
  • the refrigerant in the outdoor unit 1 is fluorine
  • the heat exchange medium in the indoor unit 3 is water, but this is not restrictive.
  • the technician can choose the type of refrigerant and heat exchange medium according to actual needs.
  • the heat exchange unit 2 is also provided with a water pump 23.
  • the water pump 23 can ensure that the water after heat exchange enters the indoor unit 3 smoothly.
  • a first heat exchanger 43 and a second heat exchanger 44 are further provided in the air processing unit 4, and the first heat exchanger 43 is provided upstream of the dehumidification evaporator 41 for convection of the air flowing through the air processing unit 4. Perform preliminary cooling to effectively ensure the subsequent dehumidification effect.
  • the dehumidification evaporator 41 is used for deep cooling and dehumidification of the air flowing through the air processing unit 4, and the second heat exchanger 44 is arranged downstream of the dehumidification evaporator 41 for
  • the air flowing through the air processing unit 4 is heated to make the air delivered by the air processing unit 4 as close to room temperature as possible, so as not to cause discomfort to the user; it should be noted that the upstream and downstream here are based on the air circulation direction.
  • the two ends of the dehumidification evaporator 41 are respectively connected to two refrigerant pipes extending from the outdoor unit 1, so that the refrigerant in the outdoor unit 1 can be transported to the dehumidification evaporator 41, and the dehumidification evaporator
  • the inlet end of 41 is provided with a dehumidification expansion valve 42 to control the flow of refrigerant;
  • the inlet end of the first heat exchanger 43 is connected to the water outlet end of the indoor unit 3, and the outlet end of the first heat exchanger 43 is connected to the A of the three-way valve 45
  • the port (inlet) is connected, the port B (first outlet) of the three-way valve 45 is connected to the water inlet end of the indoor unit 3, and the port C (second outlet) of the three-way valve 45 is connected to the inlet end of the second heat exchanger 44
  • the outlet end of the second heat exchanger 44 is connected to the water inlet end of the indoor unit 3.
  • the fresh air heat exchange unit can control the connection state of the three-way valve 45 according to the user's target temperature, so as to meet different heat exchange requirements; specifically, when the air after dehumidification needs to be warmed up, it is connected to AC, and when the dehumidification is processed When the air does not need to be warmed up, it connects to AB.
  • the first heat exchanger 43 can achieve a preliminary cooling effect with the use of the hot water exchange originally required by the indoor unit 3 without resorting to other heat exchange systems, thereby effectively saving equipment costs.
  • the water heated by the heat exchange in the first heat exchanger 43 can also directly flow into the second heat exchanger 44, so as to heat up the air flowing through the air processing unit 4, so as to realize heat recovery and utilization, thereby simplifying the unit to the greatest extent. Structure and operating costs.
  • the second heat exchanger 44 can also be connected with other elements to achieve the heating effect.
  • the inlet end of the second heat exchanger 44 is directly connected with the water outlet end of the indoor unit 3, or the second heat exchanger 44 is directly connected to the water outlet end of the indoor unit 3.
  • the heat exchanger 44 can also be provided with an electric heating device alone, and the technician can set it according to actual use requirements, as long as the second heat exchanger 44 can heat up the air.
  • the present invention does not impose any restrictions on the specific structures of the dehumidification evaporator 41, the first heat exchanger 43, and the second heat exchanger 44, as long as they can each achieve corresponding functions.
  • the air processing unit 4 also includes an air inlet 46 and a return air inlet 48.
  • the air processing unit 4 is connected to the outdoors through the air inlet 46 so as to introduce outdoor air through the air inlet 46, and the air return 48 is connected to the air through the return air duct 49 Indoors are connected.
  • the indoor air is introduced into the air processing unit 4 through the return air duct 49, and can be mixed with the outdoor air introduced through the air inlet 46, and then passes through the first heat exchanger 43, the dehumidification evaporator 41 and the second heat exchanger in turn.
  • the exchanger 44 performs processing, and the air processing unit 4 is also provided with a blower fan 50, which can accelerate the air in the air processing unit 4 to be transported into the room through the blower duct 51, thereby achieving the effect of air purification.
  • a blower fan 50 which can accelerate the air in the air processing unit 4 to be transported into the room through the blower duct 51, thereby achieving the effect of air purification.
  • the present invention does not impose any restriction on the specific number and structure of the air inlet 46 and the return air outlet 48, and the technician can set it by himself according to actual use requirements.
  • a fresh air valve 47 is provided at the air inlet 46, and the fresh air valve 47 is used to control the opening and closing state of the air inlet 46 to control the amount of outdoor air introduced, thereby effectively controlling the mixing ratio of outdoor air and indoor air in the air processing unit 4 .
  • the present invention does not impose any restrictions on the specific structure of the fresh air valve 47, and technicians can set it according to actual needs, as long as the fresh
  • the fresh air heat exchange unit further includes a controller and a carbon dioxide concentration detector, and the controller can execute the control method of the present invention.
  • the carbon dioxide concentration detector can detect the carbon dioxide concentration in the room, and the controller can control the operation of the fresh air heat exchange unit according to the detected carbon dioxide concentration.
  • the controller may be the original controller of the fresh air heat exchange unit, or it may be used to implement the present invention. With the invented control method and the separate controller, technicians can set the structure and model of the controller according to actual use requirements.
  • the preferred embodiment of the control method of the present invention specifically includes the following steps:
  • S102 Control the opening and closing state of the air inlet according to the concentration of carbon dioxide
  • step S101 the controller can detect the carbon dioxide concentration in the room through the carbon dioxide concentration detector; of course, the present invention does not impose any restriction on the specific detection method of carbon dioxide concentration, and technicians can set it according to actual needs.
  • step S102 the controller can control the opening and closing state of the air inlet 46 according to the detected carbon dioxide concentration; it should be noted that the present invention does not impose any restrictions on its specific control method, as long as the control method is based on carbon dioxide.
  • the concentration is used to control the opening and closing state of the air inlet 46 and the mixing ratio of outdoor air and indoor air, which belongs to the protection scope of the present invention.
  • the controller controls the opening and closing state of the air inlet 46 by controlling the opening degree of the fresh air valve 47; of course, this is not restrictive, and technicians can also use other methods to control The opening and closing state of the air inlet 46, this specific control method change does not deviate from the basic principle of the present invention. If the controller determines that the detected carbon dioxide concentration is less than or equal to 800 ppm, it means that the indoor oxygen is sufficient. In this case, the controller controls the fresh air valve 47 to close, so that the air processing unit 4 only needs to perform indoor return air.
  • the treatment is sufficient, so as to effectively achieve the energy-saving effect; if the controller determines that the detected carbon dioxide concentration is greater than 800 ppm and less than or equal to 900 ppm, it means that the indoor carbon dioxide is slightly higher. In this case, the controller controls the fresh air valve 47 Open to the first preset opening degree, so as to ensure the energy-saving effect while effectively ensuring the constant oxygen environment in the room; if the controller determines that the detected carbon dioxide concentration is greater than 900 ppm and less than or equal to 1000 ppm, then It shows that the indoor carbon dioxide is slightly higher.
  • the controller controls the fresh air valve 47 to open to the second preset opening degree, where the second preset opening degree is greater than the first preset opening degree, In order to introduce more outdoor fresh air, so as to ensure the energy-saving effect and effectively ensure the constant oxygen environment in the room; if the controller determines that the detected carbon dioxide concentration is greater than 1000 ppm, it means that there is more indoor carbon dioxide. In this case, The controller controls the fresh air valve 47 to be fully opened, so as to introduce as much outdoor fresh air as possible, thereby effectively ensuring a constant oxygen environment in the room. It should be noted that the technicians can set different numerical ranges and specific numerical values of the first preset opening degree and the second preset opening degree by themselves according to actual use requirements.
  • the present invention also provides a control method.
  • the controller needs to control the outlet water temperature of the ceiling radiant heat exchanger 31 to always be higher than the indoor dew point temperature, and the difference reaches the first preset temperature; when the controller When it is detected that the outlet water temperature of the ceiling radiation heat exchanger 31 is lower than the indoor dew point temperature and the difference reaches the second preset temperature, the controller controls the fresh air heat exchange unit to stop, so as to effectively prevent the ceiling condensation problem.

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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Abstract

本发明属于换热技术领域，具体提供一种新风换热机组及其控制方法。本发明旨在解决现有新风系统和换热系统彼此独立运行而导致设备成本高、安装麻烦、占用空间大的问题。为此，本发明的新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，室内单元能够与室内空气进行换热，室外单元能够与室内单元在换热单元中实现换热，空气处理单元能够将室外空气处理后送入室内，空气处理单元中设置有除湿蒸发器，除湿蒸发器与室外单元相连，以便室外单元中的冷媒能够流入除湿蒸发器中，从而对被引入的空气进行除湿处理。本发明通过一个室外单元就能同时实现换热功能和新风功能，有效降低了机组整体成本、减少机组占用空间、简化机组安装过程。

Description

新风换热机组及其控制方法 技术领域
本发明属于换热技术领域，具体提供一种新风换热机组及其控制方法。
背景技术
随着换热技术的不断发展，用户对空调机组的综合性能也提出了越来越高的要求。为了使空调机组能够有效满足用户对室内环境恒温、恒湿、恒净、恒氧的需求，现有很多空调机组都同时配置有换热系统和新风系统，换热系统用于满足用户对环境的恒温需求，新风系统则用于满足用户对环境的恒湿、恒净、恒氧需求。现有空调机组虽然已经能够满足用户的使用需求，但是，现有空调机组的新风系统和换热系统都是彼此独立的两个系统，两个系统独立运行、独立控制，各自实现其各自的功能，因而导致现有空调机组不仅需要较高的设备成本，而且还具有安装麻烦、占用空间大等问题。此外，由于新风系统大多需要安装在室内，因此，新风系统中的压缩机会在工作时产生较大的噪音，从而导致用户体验不佳的问题。
相应地，本领域需要一种新的新风换热机组及其控制方法来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有新风系统和换热系统彼此独立运行而导致设备成本高、安装麻烦、占用空间大的问题，本发明提供了一种新风换热机组，其特征在于，所述新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，所述室内单元能够与室内空气进行换热，所述室外单元能够与所述室内单元在所述换热单元中实现换热，所述空气处理单元能够将室外空气处理后送入室内，所述空气处理单元中设置有除湿蒸发器，所述除湿蒸发器与所述室外单 元相连，以便所述室外单元中的冷媒能够流入所述除湿蒸发器中，从而对被引入的空气进行除湿处理。
在上述新风换热机组的优选技术方案中，所述空气处理单元中还设置有第一热交换器，所述第一热交换器设置在所述除湿蒸发器的上游，并且所述第一热交换器与所述室内单元相连，以便所述室内单元中的换热介质能够流入所述第一热交换器中，从而对除湿前的空气进行初次冷却。
在上述新风换热机组的优选技术方案中，所述空气处理单元中还设置有第二热交换器，所述第二热交换器设置在所述除湿蒸发器的下游，所述第二热交换器用于对除湿后的空气进行升温处理。
在上述新风换热机组的优选技术方案中，所述第二热交换器的入口与所述第一热交换器的出口相连，以便从所述第一热交换器中流出的换热介质能够流入所述第二热交换器中，从而对除湿后的空气进行升温处理。
在上述新风换热机组的优选技术方案中，所述空气处理单元包括进风口，所述进风口与室外相连通，并且所述进风口处设置有新风阀，所述新风阀用于控制所述进风口的开闭状态。
在上述新风换热机组的优选技术方案中，所述空气处理单元还包括回风口，所述回风口与室内相连通，以便将室内空气引入所述空气处理单元中与室外空气混合处理后再送入室内。
在上述新风换热机组的优选技术方案中，所述室内单元中设置有辐射换热器，所述室内单元通过所述辐射换热器与室内空气进行换热。
本发明还提供了一种用于新风换热机组的控制方法，所述新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，所述室内单元能够与室内空气进行换热，所述室外单元能够与所述室内单元在所述换热单元中实现换热，所述空气处理单元能够将室外空气处理后送入室内，所述空气处理单元中设置有除湿蒸发器，所述除湿蒸发器与所述室外单元相连，以便所述室外单元中的冷媒能够流入所述除湿蒸发器中，从而对被引入的空气进行除湿处理，所述空气处理单元包括进风口和回风口，所述进风口与室外相连通，所述回风口与室内相连通，以 便将室内空气引入所述空气处理单元中与室外空气混合处理后再送入室内；所述控制方法包括：获取室内的二氧化碳浓度；根据所述二氧化碳浓度，控制所述进风口的开闭状态。
在上述控制方法的优选技术方案中，“根据所述二氧化碳浓度，控制所述进风口的开闭状态”的步骤具体包括：如果所述二氧化碳浓度小于或等于预设浓度，则控制所述进风口关闭；并且/或者，如果所述二氧化碳浓度大于所述预设浓度，则控制所述进风口开启。
在上述控制方法的优选技术方案中，“控制所述进风口开启”的步骤具体包括：根据所述二氧化碳浓度与所述预设浓度的差值大小，控制所述进风口的开启程度。
本领域技术人员能够理解的是，在本发明的技术方案中，本发明的新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，室内单元能够与室内空气进行换热，以便有效保证新风换热机组的换热效果，室外单元能够与室内单元在换热单元中实现换热，空气处理单元能够将室外空气处理后送入室内，空气处理单元中设置有除湿蒸发器，除湿蒸发器与室外单元相连，以便室外单元中的冷媒能够流入除湿蒸发器中，从而对被引入的空气进行除湿处理，以使新风换热机组能够具备新风功能，本申请中的室外单元不仅能够与室内单元进行换热，以便有效保证新风换热机组的换热功能，而且还能够给空气处理单元中的除湿蒸发器供应冷媒，以便有效保证新风换热机组的除湿功能，即通过一个室外单元就能同时保证新风换热机组的换热效果和除湿效果，进而有效降低设备成本、减少占用空间、简化安装过程，并且还能够有效降低空气处理单元工作时产生的噪音，达到有效提升用户体验的效果。
附图说明
图1是本发明的新风换热机组的整体结构示意图；
图2是本发明的控制方法的优选实施例的具体步骤流程图；
附图标记：
1、室外单元；
11、压缩机；12、气液分离器；13、四通阀；14、室外换热器；15、室外膨胀阀；
2、换热单元；
21、水氟换热器；22、换热膨胀阀；23、水泵；
3、室内单元；
31、顶棚辐射换热器；32、顶棚辐射电磁阀；33、地板辐射换热器；34、地板辐射电磁阀；
4、空气处理单元；
41、除湿蒸发器；42、除湿膨胀阀；43、第一热交换器；44、第二热交换器；45、三通阀；46、进风口；47、新风阀；48、回风口；49、回风管道；50、送风扇；51、送风管道。
具体实施方式
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，尽管本申请中按照特定顺序描述了本发明的方法的各个步骤，但是这些顺序并不是限制性的，在不偏离本发明的基本原理的前提下，本领域技术人员可以按照不同的顺序来执行所述步骤。
需要说明的是，在本优选实施例的描述中，术语“左”、“右”、“前”、“后”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述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发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“相连”、“连接”应做广义理解，例如，可以是直接相连，也可以通过中间媒介间接相连，还可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。
首先参照图1，该图是本发明的新风换热机组的整体结构示意图。如图1所示，该新风换热机组包括室外单元1、换热单元2、室内单元3和空气处理单元4，其中，室内单元3能够与室内空气进行换热， 从而实现换热效果，室外单元1能够与室内单元3在换热单元2中实现换热，室外单元1不断与室外空气进行换热，再与室内单元3换热，以便室内单元3能够源源不断地将冷量或热量输送至室内，空气处理单元4能够将室外空气处理后送入室内，从而实现新风功能，空气处理单元4中设置有除湿蒸发器41，除湿蒸发器41与室外单元1相连，以便室外单元1中的冷媒能够流入除湿蒸发器41中，从而对被引入的空气进行除湿处理。本领域技术人员能够理解的是，本发明不对室外单元1、换热单元2、室内单元3和空气处理单元4的具体结构作任何限制，只要室外单元1既能够与室内单元3换热而实现换热功能，又能够给除湿蒸发器41供应冷媒而实现除湿功能即可，换言之，室内单元3和空气处理单元4共用一个室外单元1即可实现相应功能。此外，还需要说明的是，本发明不对除湿蒸发器41的具体类型作任何限制，只要空气处理单元4能够通过除湿蒸发器41实现除湿功能即可。
进一步地，室外单元1中设置有一条换热支路，所述换热支路上设置有压缩机11、气液分离器12、四通阀13、室外换热器14和室外膨胀阀15，其中，四通阀13的s口与气液分离器12的入口相连，气液分离器12的出口与压缩机11的入口相连，四通阀13的d口与压缩机11的出口相连，四通阀13的c口与室外换热器14相连，室外换热器14的远离四通阀13的一端与室外膨胀阀15相连，室外换热器14能够与室外空气进行换热，以便改变所述换热支路中的冷媒温度；当然，需要说明的是，本发明不对室外单元1的具体结构作任何限制，只要室外单元1能够与室外空气进行换热以改变冷媒温度即可。此外，位于室外膨胀阀15的远离室外换热器14的一端的冷媒管道能够向外延伸至换热单元2中而与室内单元3进行换热，再与四通阀13的e口相连，从而实现冷媒的循环；换热单元2中设置有换热膨胀阀22，换热膨胀阀22设置在室外膨胀阀15的远离室外换热器14的一侧，以便控制管道中的冷媒流量。
继续参阅图1，室内单元3中设置有顶棚辐射换热器31和地板辐射换热器33，以便与室内空气进行换热。需要说明的是，辐射换热不需要像普通室内盘管换热一样依靠风机来实现换热，其仅通过毛细管或地暖管辐射的方式向室内辐射冷量或热量，从而达到恒温、恒静的效果，以便进一步提升用户体验。顶棚辐射换热器31的入口端设置有顶 棚辐射电磁阀32，以便控制顶棚辐射换热器31的换热能力；地板辐射换热器33的入口端设置有地板辐射电磁阀34，以便控制地板辐射换热器33的换热能力。此外，还需要说明的是，本发明不对室内单元3中设置的辐射换热器的具体数量和类型作任何限制，技术人员可以根据实际使用需求自行设定。进一步地，换热单元2中设置有水氟换热器21，室外单元1中的冷媒与室内单元3中的换热介质能够在水氟换热器21中进行换热；当然，虽然本优选实施例中的室外单元1中的冷媒为氟，室内单元3中的换热介质为水，但这并不是限制性的，技术人员可以根据实际使用需求自行选定冷媒和换热介质的类型，只要能够实现换热即可；并且本发明也不对水氟换热器21的具体结构类型作任何限制，技术人员可以根据实际使用需求自行设定。换热单元2中还设置有水泵23，水泵23能够保证换热后的水顺利进入室内单元3中，技术人员可以根据实际使用需求自行选定水泵23的型号。
进一步地，空气处理单元4中还设置有第一热交换器43和第二热交换器44，第一热交换器43设置在除湿蒸发器41的上游，用于对流过空气处理单元4的空气进行初步冷却，以便有效保证后续的除湿效果，除湿蒸发器41用于对流过空气处理单元4的空气进行深度冷却和除湿处理，第二热交换器44设置在除湿蒸发器41的下游，用于对流过空气处理单元4的空气进行升温处理，以使空气处理单元4输送的空气尽量接近室温，以免引起用户不适；需要说明的是，此处的上游和下游均是以空气流通方向为准。在本优选实施例中，除湿蒸发器41的两端分别与从室外单元1中延伸出的两根冷媒管道相连，以便室外单元1中的冷媒能够输送至除湿蒸发器41中，并且除湿蒸发器41的入口端设置有除湿膨胀阀42，以便控制冷媒流量；第一热交换器43的入口端与室内单元3的出水端相连，第一热交换器43的出口端与三通阀45的A口(入口)相连，三通阀45的B口(第一出口)与室内单元3的进水端相连，三通阀45的C口(第二出口)与第二热交换器44的入口端相连，第二热交换器44的出口端与室内单元3的进水端相连。所述新风换热机组可以通过用户的目标温度来控制三通阀45的连通状态，以便满足不同换热需求；具体地，当除湿处理后的空气需要升温时则连通AC，而当除湿处理后的空气不需要升温时则连通AB。第一热交换器43借助室内单元3 原本就需要使用的换热水既可实现初步冷却的效果，而无需再借助其他换热系统，从而有效节省了设备成本。在第一热交换器43换热升温后的水还能够直接流入第二热交换器44中，以便对流过空气处理单元4的空气进行升温处理，从而实现热量回收利用，进而最大程度地简化机组结构和运行成本。需要说明的是，第二热交换器44也可以与其他元件相连而实现升温效果，例如，直接将第二热交换器44的入口端直接与室内单元3的出水端相连，或者给第二热交换器44单独设置电加热装置也可，技术人员可以根据实际使用需求自行设定，只要第二热交换器44能够对空气进行升温处理即可。此外，本领域技术人员能够理解的是，本发明不对除湿蒸发器41、第一热交换器43和第二热交换器44的具体结构作任何限制，只要其各自能够实现相应功能即可。
继续参阅图1，空气处理单元4还包括进风口46和回风口48，空气处理单元4通过进风口46与室外相连通，以便通过进风口46引入室外空气，回风口48通过回风管道49与室内相连通，室内空气通过回风管道49引入空气处理单元4中，并能够与通过进风口46引入的室外空气相混合，再依次通过第一热交换器43、除湿蒸发器41和第二热交换器44进行处理，空气处理单元4中还设置有送风扇50，送风扇50能够加速空气处理单元4中的空气通过送风管道51被输送至室内，从而实现空气净化的效果。需要说明的是，本发明不对进风口46和回风口48的具体数量和结构作任何限制，技术人员可以根据实际使用需求自行设定。此外，进风口46处设置有新风阀47，新风阀47用于控制进风口46的开闭状态，以便控制室外空气的引入量，进而有效控制空气处理单元4中室外空气与室内空气的混合比例。本领域技术人员能够理解的是，本发明不对新风阀47的具体结构作任何限制，技术人员可以根据实际需求自行设定，只要新风阀47能够控制进风口46的开闭程度即可。
接着参阅图2，该图是本发明的控制方法的优选实施例的具体步骤流程图。如图2所示，基于上述优选实施例中所述的新风换热机组，所述新风换热机组还包括控制器和二氧化碳浓度检测仪，所述控制器能够执行本发明的控制方法，所述二氧化碳浓度检测仪能够检测室内的二氧化碳浓度，所述控制器能够根据检测到的二氧化碳浓度控制所述新风换热机组的运行。本领域技术人员能够理解的是，本发明不对所述 控制器的具体结构和型号作任何限制，并且所述控制器可以是所述新风换热机组原有的控制器，也可以是为执行本发明的控制方法而单独设置的控制器，技术人员可以根据实际使用需求自行设定所述控制器的结构和型号。本发明的控制方法的优选实施例具体包括下列步骤：
S101：获取室内的二氧化碳浓度；
S102：根据二氧化碳浓度，控制进风口的开闭状态；
S103：如果二氧化碳浓度≤800ppm，则控制新风阀关闭；
S104：如果800ppm＜二氧化碳浓度≤900ppm，则控制新风阀开启至第一预设开度；
S105：如果900ppm＜二氧化碳浓度≤1000ppm，则控制新风阀开启至第二预设开度；
S106：如果二氧化碳浓度＞1000ppm，则控制新风阀全开。
具体地，在步骤S101中，所述控制器能够通过所述二氧化碳浓度检测仪检测室内的二氧化碳浓度；当然，本发明不对二氧化碳浓度的具体检测方式作任何限制，技术人员可以根据实际使用需求自行设定。接着，在步骤S102中，所述控制器能够根据检测到的二氧化碳浓度控制进风口46的开闭状态；需要说明的是，本发明不对其具体控制方式作任何限制，只要该控制方法是基于二氧化碳浓度来控制进风口46的开闭状态而控制室外空气与室内空气的混合比例，就属于本发明的保护范围。
进一步地，在本优选实施例中，所述控制器通过控制新风阀47的开度来控制进风口46的开闭状态；当然，这并不是限制性的，技术人员也可以借助其他方式来控制进风口46的开闭状态，这种具体控制方法的改变并不偏离本发明的基本原理。如果所述控制器判断出检测到的二氧化碳浓度小于或等于800ppm，则说明室内氧气充足，在此情形下，所述控制器控制新风阀47关闭，以便空气处理单元4仅需要对室内回风进行处理即可，从而有效达到节能效果；如果所述控制器判断出检测到的二氧化碳浓度大于800ppm且小于或等于900ppm，则说明室内二氧化碳略多，在此情形下，所述控制器控制新风阀47开启至所述第一预设开度，以便在保证节能效果的同时，还能够有效保证室内的恒氧环境；如果所述控制器判断出检测到的二氧化碳浓度大于900ppm且小于或等于 1000ppm，则说明室内二氧化碳稍多，在此情形下，所述控制器控制新风阀47开启至所述第二预设开度，其中，所述第二预设开度大于所述第一预设开度，以便引入更多室外新风，从而在保证节能效果的同时，有效保证室内的恒氧环境；如果所述控制器判断出检测到的二氧化碳浓度大于1000ppm，则说明室内二氧化碳较多，在此情形下，所述控制器控制新风阀47全开，以便尽量多地引入室外新风，从而有效保证室内的恒氧环境。需要说明的是，技术人员可以根据实际使用需求自行设定不同数值区间以及第一预设开度和第二预设开度的具体数值。
此外，本发明还提供了一种控制方法，所述控制器需要控制顶棚辐射换热器31的出水温度始终高于室内露点温度，并且其差值达到第一预设温度；当所述控制器检测到顶棚辐射换热器31的出水温度低于室内露点温度且差值达到第二预设温度时，所述控制器控制所述新风换热机组停机，以便有效防止天花板凝露问题。
最后需要说明的是，上述实施例均是本发明的优选实施方案，并不作为对本发明保护范围的限制。本领域技术人员在实际使用本发明时，可以根据需要适当添加或删减一部分步骤，或者调换不同步骤之间的顺序。这种改变并没有超出本发明的基本原理，属于本发明的保护范围。
至此，已经结合附图描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (10)

  1. 一种新风换热机组，其特征在于，所述新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，
    所述室内单元能够与室内空气进行换热，所述室外单元能够与所述室内单元在所述换热单元中实现换热，
    所述空气处理单元能够将室外空气处理后送入室内，所述空气处理单元中设置有除湿蒸发器，所述除湿蒸发器与所述室外单元相连，以便所述室外单元中的冷媒能够流入所述除湿蒸发器中，从而对被引入的空气进行除湿处理。
  2. 根据权利要求1所述的新风换热机组，其特征在于，所述空气处理单元中还设置有第一热交换器，
    所述第一热交换器设置在所述除湿蒸发器的上游，并且所述第一热交换器与所述室内单元相连，以便所述室内单元中的换热介质能够流入所述第一热交换器中，从而对除湿前的空气进行初次冷却。
  3. 根据权利要求2所述的新风换热机组，其特征在于，所述空气处理单元中还设置有第二热交换器，
    所述第二热交换器设置在所述除湿蒸发器的下游，所述第二热交换器用于对除湿后的空气进行升温处理。
  4. 根据权利要求3所述的新风换热机组，其特征在于，所述第二热交换器的入口与所述第一热交换器的出口相连，以便从所述第一热交换器中流出的换热介质能够流入所述第二热交换器中，从而对除湿后的空气进行升温处理。
  5. 根据权利要求1至4中任一项所述的新风换热机组，其特征在于，所述空气处理单元包括进风口，
    所述进风口与室外相连通，并且所述进风口处设置有新风阀，所述新风阀用于控制所述进风口的开闭状态。
  6. 根据权利要求5所述的新风换热机组，其特征在于，所述空气处理单元还包括回风口，
    所述回风口与室内相连通，以便将室内空气引入所述空气处理单元中与室外空气混合处理后再送入室内。
  7. 根据权利要求1至4中任一项所述的新风换热机组，其特征在于，所述室内单元中设置有辐射换热器，所述室内单元通过所述辐射换热器与室内空气进行换热。
  8. 一种用于新风换热机组的控制方法，其特征在于，所述新风换热机组包括室外单元、换热单元、室内单元和空气处理单元，
    所述室内单元能够与室内空气进行换热，所述室外单元能够与所述室内单元在所述换热单元中实现换热，
    所述空气处理单元能够将室外空气处理后送入室内，所述空气处理单元中设置有除湿蒸发器，所述除湿蒸发器与所述室外单元相连，以便所述室外单元中的冷媒能够流入所述除湿蒸发器中，从而对被引入的空气进行除湿处理，
    所述空气处理单元包括进风口和回风口，所述进风口与室外相连通，所述回风口与室内相连通，以便将室内空气引入所述空气处理单元中与室外空气混合处理后再送入室内；
    所述控制方法包括：
    获取室内的二氧化碳浓度；
    根据所述二氧化碳浓度，控制所述进风口的开闭状态。
  9. 根据权利要求8所述的控制方法，其特征在于，“根据所述二氧化碳浓度，控制所述进风口的开闭状态”的步骤具体包括：
    如果所述二氧化碳浓度小于或等于预设浓度，则控制所述进风口关闭；并且/或者
    如果所述二氧化碳浓度大于所述预设浓度，则控制所述进风口开启。
  10. 根据权利要求9中所述的控制方法，其特征在于，“控制所述进风口开启”的步骤具体包括：
    根据所述二氧化碳浓度与所述预设浓度的差值大小，控制所述进风口的开启程度。
PCT/CN2020/101559 2020-02-27 2020-07-13 新风换热机组及其控制方法 WO2021169146A1 (zh)

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