CN114688691A - Indoor air-conditioning system - Google Patents

Indoor air-conditioning system Download PDF

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Publication number
CN114688691A
CN114688691A CN202011605334.3A CN202011605334A CN114688691A CN 114688691 A CN114688691 A CN 114688691A CN 202011605334 A CN202011605334 A CN 202011605334A CN 114688691 A CN114688691 A CN 114688691A
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China
Prior art keywords
temperature
water
pipeline
indoor
water supply
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Pending
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CN202011605334.3A
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Chinese (zh)
Inventor
孙永霞
梁琳
李兵
张东华
尹灵
黄凌洁
韩欣健
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China Institute of Building Standard Design and Research Co Ltd
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China Institute of Building Standard Design and Research Co Ltd
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Priority to CN202011605334.3A priority Critical patent/CN114688691A/en
Publication of CN114688691A publication Critical patent/CN114688691A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • 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
    • 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
    • F24F5/0089—Systems using radiation from walls or panels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • 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
    • F24F2003/144—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 by dehumidification only
    • F24F2003/1446—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 by dehumidification only by condensing
    • 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
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • 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
    • 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

The invention relates to an indoor air conditioning system, which comprises a fresh air device, a refrigerating and dehumidifying device and a control device, wherein the control device is connected with the fresh air device and the refrigerating and dehumidifying device; the refrigeration and dehumidification device comprises a temperature sensor, a humidity sensor, a low-temperature radiation plate, a water supply pipeline and a water return pipeline, wherein the low-temperature radiation plate, the temperature sensor and the humidity sensor are arranged indoors; the first end of the water supply pipeline is connected with a waterway channel inlet in the low-temperature radiation plate; and the first end of the water return pipeline is connected with the outlet of the waterway channel in the low-temperature radiation plate. The indoor air conditioning system provided by the invention is used for collecting data aiming at indoor key parameter data and controlling based on the collected data, so that each indoor state parameter is maintained within an allowable range, and the indoor comfort level is ensured.

Description

Indoor air-conditioning system
Technical Field
The invention belongs to the technical field of green buildings and energy conservation and environmental protection, and particularly relates to an indoor air conditioning system.
Background
Currently, energy supply and demand and ecological environment protection face increasingly severe situations, the realization of energy conservation and emission reduction targets and work tasks proposed by the nation is a major problem in current economic development, and the nation takes energy conservation assessment, energy audit and carbon emission management as important management means for controlling energy consumption total and promoting ecological civilization construction. The national attention on energy conservation and environmental protection is higher and higher, and a series of related policies are issued successively to improve the environment and save energy.
The energy consumption of buildings in China is about 1/4 of the total energy consumption of the whole society, wherein the energy consumption of air conditioners is more than 50%. With the acceleration of the urbanization process of China, the newly-increased building area increases every year, so that the absolute value of the annual energy consumption of the building is further increased, and a serious energy bottleneck is caused to the sustainable development of the building industry and the whole society of China. Meanwhile, in many domestic cities, haze which seriously affects the health of people continuously appears in recent years, and the haze is directly related to the increase of building energy consumption. Under the large background of 'energy conservation and emission reduction' of the whole society, building energy conservation, particularly the operation energy conservation of a heating ventilation air-conditioning system in a building, becomes a primary task and a target of the building industry.
Disclosure of Invention
The invention aims to provide an indoor air conditioning system, which is used for collecting data aiming at indoor key parameter data and controlling based on the collected data, so that indoor state parameters are maintained within an allowable range, indoor comfort is ensured, and energy waste in the operation process of the indoor air conditioning system is effectively avoided.
The indoor air conditioning system of the invention comprises a fresh air device, a refrigerating and dehumidifying device and a control device, wherein the control device is connected with the fresh air device and the refrigerating and dehumidifying device to control the fresh air device and the refrigerating and dehumidifying device to operate,
the fresh air device comprises a fresh air pipeline, a freezing and dehumidifying part and a fan, wherein the freezing and dehumidifying part and the fan are arranged on the fresh air pipeline;
the refrigeration and dehumidification device comprises a temperature sensor, a humidity sensor, a low-temperature radiation plate, a water supply pipeline and a water return pipeline, wherein the low-temperature radiation plate, the temperature sensor and the humidity sensor are arranged indoors; the first end of the water supply pipeline is connected with a waterway channel inlet in the low-temperature radiation plate; and the first end of the water return pipeline is connected with the outlet of the waterway channel in the low-temperature radiation plate.
In one embodiment, the freezing and dehumidifying part comprises an outdoor quick freezing and dehumidifying unit and an indoor quick freezing and dehumidifying unit, the indoor quick freezing and dehumidifying unit is arranged on the fresh air pipeline, and the indoor quick freezing and dehumidifying unit is communicated with the outdoor quick freezing and dehumidifying unit.
In one embodimentThe control device is connected with the temperature sensor and the humidity sensor, and determines the dew point temperature t of the indoor air according to the indoor temperature detected by the temperature sensor and the indoor humidity detected by the humidity sensorLThe control device is used for controlling the dew-point temperature tLAnd controlling the refrigeration and dehumidification device to operate.
In one embodiment, the temperature sensor is a temperature sensor detecting a dry bulb temperature t of the indoor air, the humidity sensor is a humidity sensor detecting a relative humidity ψ of the indoor air, and the dew point temperature t of the indoor airLFrom the formula tLA ψ + Bt, where a and B are the calculated coefficients.
In one embodiment, the refrigeration and dehumidification device further comprises an electric water supply valve and an electric water return valve, the electric water supply valve is arranged on the water supply pipeline, and the electric water return valve is arranged on the water return pipeline.
In one embodiment, the refrigeration and dehumidification device further comprises a communication pipeline, a self-circulation water return pump and a self-circulation electric valve,
the communication pipeline is arranged between the water supply pipeline and the water return pipeline, the first end of the communication pipeline is connected with the position between the first end of the water supply pipeline and the water supply electric valve arranged on the water supply pipeline, the second end of the communication pipeline is connected with the position between the first end of the water return pipeline and the water return electric valve arranged on the water return pipeline,
and a self-circulation water return pump and a self-circulation electric valve are arranged on the communicating pipeline.
In one embodiment, the refrigeration and dehumidification device further comprises a water supply temperature sensor and a water return temperature sensor, wherein the water supply temperature sensor detects the water supply temperature t1 in the water supply pipeline, the water return temperature sensor detects the water return temperature t2 in the water return pipeline,
when the indoor air conditioning system works, if the dew point temperature t is higher than the dew point temperature tLIf the water return temperature is more than or equal to t2, the control device opens the freezing and dehumidifying part and closes the liquid circulation in the low-temperature radiation plate;
if the dew isPoint temperature tLIf the water supply temperature is greater than or equal to t1 and lower than the water return temperature t2, the control device opens the freezing and dehumidifying part, closes the water supply electric valve and the water return electric valve, opens the self-circulation water pump and opens the self-circulation electric valve;
when the dew point temperature t isLWhen the temperature is lower than the water supply temperature t1 and the indoor temperature is higher than or equal to the upper limit value of the room temperature, the control device adjusts and controls the operation of the freezing and dehumidifying part and opens the water supply electric valve and the water return electric valve to the maximum opening; if the indoor temperature is more than or equal to the set value of the room temperature and is lower than the upper limit value of the room temperature, the control device closes the freezing and dehumidifying part and carries out opening degree regulation control on the water supply electric valve and/or the water return electric valve; and if the indoor temperature is lower than the set value of the room temperature, the control device closes the freezing and dehumidifying part and opens the water supply electric valve and/or the water return electric valve of the low-temperature radiation plate water supply branch to the minimum opening.
In one embodiment, the fresh air device further comprises a carbon dioxide concentration detector, the carbon dioxide concentration detector 7 is arranged indoors, and the control device controls the operation of the fresh air device according to the carbon dioxide concentration value received from the carbon dioxide concentration detector.
In one embodiment, the fresh air device further comprises a fresh air pipeline adjusting valve, the fresh air pipeline adjusting valve is arranged on the fresh air pipeline,
the control device compares the detected carbon dioxide concentration value with a carbon dioxide concentration set value, and if the detected carbon dioxide concentration value is lower than the carbon dioxide concentration set value, the control device closes the fresh air pipeline regulating valve; if the detected carbon dioxide concentration value is higher than the carbon dioxide concentration set value and lower than the carbon dioxide concentration maximum limit value, the control device adjusts the opening degree of the fresh air pipeline adjusting valve; and if the detected carbon dioxide concentration value is higher than the maximum limit value of the carbon dioxide concentration, the control device opens the fresh air pipeline regulating valve to the maximum opening.
Hair brushThe beneficial effects are as follows: the indoor air conditioning system provided by the embodiment of the invention aims at the indoor key parameter data (temperature t, relative humidity psi and preferred carbon dioxide concentration CO)2) And acquiring data, comparing, judging and analyzing the acquired data with a threshold value, executing a corresponding control instruction, and ensuring that indoor state parameters are maintained within an allowable range, thereby ensuring the indoor absolute comfort level. In addition, the indoor air conditioning system of the embodiment of the invention controls the water supply temperature of the radiation plate to be 1 ℃ or more than 2 ℃ higher than the indoor dew point temperature through the algorithm prediction and the control strategy of completely decoupling each parameter data, thereby avoiding the condensation of the indoor inner surface and solving the bottleneck of limited existing application of the low-temperature radiation plate. Compared with the traditional air conditioning system, the indoor air conditioning system provided by the embodiment of the invention can ensure the cleanness and sanitation of the indoor environment; the indoor fresh air quantity is controlled to ensure that the indoor fresh air is sufficient; adopt independent new trend and quick dehumidification module to dehumidify the room air for indoor humidity control is more accurate, ensures indoor disappearance dewfall, can effectively avoid the energy waste of indoor air conditioning system operation in-process.
Drawings
Fig. 1 is a schematic structural arrangement diagram of an indoor air conditioning system according to an embodiment of the present invention;
fig. 2 is a block diagram of a fresh air device of an indoor air conditioning system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating the operation of a fresh air device of an indoor air conditioning system according to an embodiment of the present invention;
fig. 4 is a block diagram of a cooling and dehumidifying apparatus of an indoor air conditioning system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating the operation of the cooling and dehumidifying apparatus of the indoor air conditioning system according to the embodiment of the present invention;
fig. 6 is a flowchart illustrating an operation of an indoor air conditioning system according to an embodiment of the present invention.
Reference numerals:
1-low temperature radiation plate; 2-fresh air pipeline; 3-a temperature sensor; 4-a humidity sensor;
5-quick freezing dehumidification outdoor machine; 6-quick freezing dehumidification indoor machine; 7-a carbon dioxide concentration detector;
8-a self-circulating water pump; 9-water supply line; 10-a water return pipeline; 11-a water supply temperature sensor;
12-a backwater temperature sensor; 13-communication pipeline
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings. Those skilled in the art will appreciate that the present invention is not limited to the drawings and the following examples.
The embodiment of the invention provides an indoor air conditioning system which comprises a fresh air device, a refrigerating and dehumidifying device and a control device, wherein the control device controls the fresh air device and the refrigerating and dehumidifying device to operate. Wherein, the new trend device can independently operate under controlling means's control, and refrigeration dehydrating unit needs to operate together with the new trend device.
Specifically, as shown in fig. 1 and 2, the fresh air device includes a fresh air pipeline 2, a fresh air pipeline regulating valve DT1, a refrigeration and dehumidification component, a fan, and a carbon dioxide concentration detector 7. The fresh air pipeline regulating valve DT1, the refrigeration and dehumidification component and the fan are arranged on the fresh air pipeline 2. The fresh air duct adjusting valve DT1 is preferably provided on the air outlet side of the freezing and dehumidifying part so as to be capable of adjusting the opening degree. Fresh air pipeline 2 will the process that the fan drove the new trend water conservancy diversion that the cooling of freezing dehumidification part dehumidified is indoor, carbon dioxide concentration detector 7 sets up indoor for detect indoor carbon dioxide concentration. The control device is connected with the freezing and dehumidifying part and the carbon dioxide concentration detector 7, and the control device controls the operation of the fresh air device according to a detection signal received from the carbon dioxide concentration detector 7. The fan may also be integrated in the freeze dehumidification section.
In the present embodiment, the freezing and dehumidifying components include an outdoor quick freezing and dehumidifying unit 5 and an indoor quick freezing and dehumidifying unit 6. The quick freezing and dehumidifying indoor unit 6 is arranged on the fresh air pipeline 2, and the quick freezing and dehumidifying indoor unit 6 is communicated with the quick freezing and dehumidifying outdoor unit 5.
In operation, as shown in fig. 3, the carbon dioxide concentration detector 7 detects the carbon dioxide concentration in the room, the control device compares the detected carbon dioxide concentration value with a set carbon dioxide concentration value, and if the detected carbon dioxide concentration value is lower than the set carbon dioxide concentration value, the control device closes the fresh air pipeline regulating valve DT1 on the fresh air pipeline 2; if the detected carbon dioxide concentration value is higher than the carbon dioxide concentration set value and lower than the carbon dioxide concentration maximum limit value, the control device can proportionally adjust the opening degree of the fresh air pipeline adjusting valve DT1 on the fresh air pipeline 2; if the detected carbon dioxide concentration value is higher than the maximum limit value of the carbon dioxide concentration, the control device opens the fresh air pipeline regulating valve DT1 on the fresh air pipeline 2 to the maximum opening degree, and preferably starts timing, and if the carbon dioxide concentration set value cannot be reached after a specified time (such as 30min), the control device gives an alarm. In this embodiment, the set value of the carbon dioxide concentration is 150ppm, and the maximum limit of the carbon dioxide concentration is 500 ppm.
As shown in fig. 1 and 4, the refrigerating and dehumidifying apparatus includes a temperature sensor 3, a humidity sensor 4, a low-temperature radiation plate 1, a water supply pipe 9, a water return pipe 10, a water supply temperature sensor 11, a water return temperature sensor 12, a communication pipe 13, a self-circulating water return pump 8, a self-circulating electric valve DT2, a water supply electric valve DT3, and a water return electric valve DT 4.
The low temperature radiation plate 1, the temperature sensor 3 and the humidity sensor 4 are installed indoors, the low temperature radiation plate 1 is laid under the ground, for example, and the temperature sensor 3 and the humidity sensor 4 are used for detecting the temperature and humidity in the room. The first end of the water supply pipeline 9 is connected with the inlet of the water channel in the low-temperature radiation plate 1, the water supply pipeline 9 is provided with a water supply temperature sensor 11 and a water supply electric valve DT3, the water supply temperature sensor 11 is used for detecting the water supply temperature t1 in the water supply pipeline 9, and the water supply electric valve DT3 is used for controlling the on-off of the water supply pipeline 9. The first end of the return water pipeline 10 is connected with the outlet of the waterway channel in the low-temperature radiation plate 1, the return water pipeline 10 is provided with a return water temperature sensor 12 and a return water electric valve DT4, the return water temperature sensor 12 is used for detecting the return water temperature t2 in the return water pipeline 10, and the return water electric valve DT4 is used for controlling the on-off of the return water pipeline 10.
Further, a communication line 13 is provided between the water supply line 9 and the water return line 10, a first end of the communication line 13 is connected to a position between the first end of the water supply line 9 and a water supply electric valve DT3 provided thereon, a second end of the communication line 13 is connected to a position between the first end of the water return line 10 and a water return electric valve DT4 provided thereon, and a self-circulating water return pump 8 and a self-circulating electric valve DT2 are provided on the communication line 13. Accordingly, the water supply electric valve DT3 and the water return electric valve DT4 are closed to disconnect the water supply pipeline 9 and the water return pipeline 10, the self-circulation electric valve DT2 is opened to connect the water supply pipeline 9 and the water return pipeline 10 to the communication pipeline 13, and the self-circulation water return pump 8 is started at this time, so that the heat-conductive fluid can self-circulate in the circulation pipeline composed of the communication pipeline 13, the water supply pipeline 9, the low-temperature radiation plate 1, and the water return pipeline 10. It should be noted that, in the present application, water may flow in the "water supply line" and the "water return line", and may also flow in other heat transfer fluids.
The control device is connected with the temperature sensor 3, the humidity sensor 4, the water supply temperature sensor 11, the water return temperature sensor 12, the self-circulation water return pump 8, the self-circulation electric valve DT2, the water supply electric valve DT3 and the water return electric valve DT4, and controls the refrigeration and dehumidification device to operate according to detection signals received from the temperature sensor 3, the humidity sensor 4, the water supply temperature sensor 11 and the water return temperature sensor 12.
In operation, as shown in fig. 3, the method comprises the following steps:
temperature sensor 3 detects indoor temperature, humidity transducer 4 detects indoor humidity, water supply temperature t1 among the water supply pipe 9 is detected to water supply temperature sensor 11, return water temperature t2 among the return water pipe 10 is detected to return water temperature sensor 12. According to different requirements of indoor temperature and humidity, different data acquisition interval time can be set, and the data acquisition interval time in the embodiment is 5 s.
The control device determines the dew point temperature of the indoor air based on the detected indoor temperature and indoor humidity. In an embodiment of the invention, the dew point temperature t of the indoor airLFrom the formula tLWhere t is the dry bulb temperature of the room air, ψ is the relative humidity of the room air, and a and B are the calculated coefficients, as specified in the table below.
Figure BDA0002865698050000061
The table lists only the coefficient values at 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100% humidity, and those skilled in the art can obtain A, B coefficient values for other humidity point values.
The control device determines the dew point temperature t of the indoor airLAnd controlling the operation of the refrigeration and dehumidification device.
In particular, if the dew point temperature tLAnd if the return water temperature t2 is higher than or equal to the preset return water temperature t2, for example, 21 ℃, the system enters a severe condensation control mode. At this time, the control device opens the freezing and dehumidifying part, so that the fresh air pipeline 2 guides fresh air cooled and dehumidified by the freezing and dehumidifying part to the indoor, closes the liquid circulation in the low-temperature radiation plate 1 (closes the water supply electric valve DT3 and/or the water return electric valve DT4, closes the self-circulation water pump 8) so as to stop cooling, and preferably starts timing. If the dew point temperature t is not reached for a specified time (for example, 5min)LAnd when the temperature is lower than the return water temperature t2, the control device gives an alarm.
If the dew point temperature tLAnd when the supply water temperature t1 is higher than or equal to the return water temperature t2, for example, t1 is 16 ℃ and t2 is 21 ℃, the normal condensation control mode is entered. At this time, the control device opens the freezing and dehumidifying part so that the fresh air pipe 2 guides the fresh air cooled and dehumidified by the freezing and dehumidifying part into the room, closes the water supply electric valve DT3 and the water return electric valve DT4, opens the self-circulation water pump 8, and opens the self-circulation electric valve DT2, so that the heat-conducting fluid can flow through the communication pipe 13,The water supply pipeline 9, the low-temperature radiation plate 1 and the water return pipeline 10 form a circulation pipeline for self circulation.
When the dew point temperature t isLWhen the temperature is lower than the water supply temperature t1, if the indoor temperature is higher than or equal to the upper limit value of the room temperature, for example, t1 is 16 ℃ and the upper limit value of the room temperature is 26 ℃, entering a transient temperature control mode, wherein the control device regulates and controls the operation of the refrigeration and dehumidification part, and opens the water supply electric valve DT3 and the water return electric valve DT4 to the maximum opening degree; if the indoor temperature is greater than or equal to the set value of the room temperature and lower than the upper limit value of the room temperature, for example, the set value of the room temperature is 24 ℃ and the upper limit value of the room temperature is 26 ℃, entering a steady-state temperature control mode, and at the moment, closing the freezing and dehumidifying part by the control device and carrying out opening adjustment control on the water supply electric valve DT3 and/or the water return electric valve DT 4; if the indoor temperature is lower than the set room temperature, for example, the set room temperature is 24 ℃, at this time, the control device closes the freezing and dehumidifying part, and opens the water supply electric valve DT3 and/or the water return electric valve DT4 of the low-temperature radiation plate water supply branch to the minimum opening degree.
Finally, the overall control flow of the indoor air conditioning system according to the embodiment of the present invention will be described with reference to fig. 6.
The temperature sensor 3, the humidity sensor 4 and the carbon dioxide concentration detector 7 are used for collecting indoor parameter data in real time, the control device preliminarily judges whether each parameter data is normal or not, if not, the control device directly gives an alarm to prompt operating personnel to take corresponding intervention measures; if the temperature is normal, the working mode is entered, and the fresh air device and the refrigeration and dehumidification device are controlled.
The indoor air conditioning system provided by the embodiment of the invention aims at indoor key parameter data (temperature t, relative humidity psi and carbon dioxide concentration CO)2) And acquiring data, comparing, judging and analyzing the acquired data with a threshold value, executing a corresponding control instruction, and ensuring that indoor state parameters are maintained within an allowable range, thereby ensuring the indoor absolute comfort level.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. An indoor air conditioning system is characterized in that the indoor air conditioning system comprises a fresh air device, a refrigerating and dehumidifying device and a control device, the control device is connected with the fresh air device and the refrigerating and dehumidifying device to control the fresh air device and the refrigerating and dehumidifying device to operate,
the fresh air device comprises a fresh air pipeline (2), a freezing and dehumidifying part and a fan, wherein the freezing and dehumidifying part and the fan are arranged on the fresh air pipeline (2);
the refrigeration and dehumidification device comprises a temperature sensor (3), a humidity sensor (4), a low-temperature radiation plate (1), a water supply pipeline (9) and a water return pipeline (10), wherein the low-temperature radiation plate (1), the temperature sensor (3) and the humidity sensor (4) are arranged indoors; the first end of the water supply pipeline (9) is connected with the inlet of a water channel in the low-temperature radiation plate (1); and the first end of the water return pipeline (10) is connected with the outlet of the waterway channel in the low-temperature radiation plate (1).
2. An indoor air conditioning system as claimed in claim 1, wherein the freezing and dehumidifying part comprises an outdoor quick freezing and dehumidifying unit (5) and an indoor quick freezing and dehumidifying unit (6), the indoor quick freezing and dehumidifying unit (6) is disposed on the fresh air duct (2), and the indoor quick freezing and dehumidifying unit (6) is communicated with the outdoor quick freezing and dehumidifying unit (5).
3. Indoor air conditioning system according to claim 1, characterized in that the control device is connected to a temperature sensor (3) and a humidity sensor (4), the control device determining the dew point temperature t of the indoor air from the indoor temperature detected by the temperature sensor (3) and the indoor humidity detected by the humidity sensor (4)LThe control device is used for controlling the dew-point temperature tLAnd controlling the refrigeration and dehumidification device to operate.
4. An indoor air conditioning system according to claim 3, wherein the temperature sensor (3) is a temperature sensor detecting a dry bulb temperature t of indoor air, the humidity sensor (4) is a humidity sensor detecting a relative humidity ψ of the indoor air, and the dew point temperature t of the indoor airLFrom the formula tLA ψ + Bt, where a and B are the calculated coefficients.
5. The indoor air conditioning system of claim 4, wherein the refrigerating and dehumidifying device further comprises a water supply electric valve and a water return electric valve, the water supply electric valve is disposed on the water supply pipeline (9), and the water return electric valve is disposed on the water return pipeline (10).
6. An indoor air conditioning system according to claim 5, wherein said refrigerating and dehumidifying apparatus further comprises a communication pipe (13), a self-circulating return pump (8) and a self-circulating electrically operated valve,
the communication pipeline (13) is arranged between the water supply pipeline (9) and the water return pipeline (10), the first end of the communication pipeline (13) is connected to the position between the first end of the water supply pipeline (9) and the water supply electric valve thereon, the second end of the communication pipeline (13) is connected to the position between the first end of the water return pipeline (10) and the water return electric valve thereon,
and a self-circulation water return pump (8) and a self-circulation electric valve are arranged on the communication pipeline (13).
7. An indoor air conditioning system according to claim 6, wherein the cooling and dehumidifying apparatus further comprises a supply water temperature sensor (11) and a return water temperature sensor (12), the supply water temperature sensor (11) detecting a supply water temperature t1 in the supply water line (9), the return water temperature sensor (12) detecting a return water temperature t2 in the return water line (10),
when the indoor air conditioning system works, if the dew point temperature t is higher than the dew point temperature tLIf the water return temperature is more than or equal to t2, the control device opens the freezing and dehumidifying part and closes the liquid circulation in the low-temperature radiation plate (1);
if the dew point temperature tLIf the water supply temperature is greater than or equal to t1 and lower than the water return temperature t2, the control device opens the freezing and dehumidifying part, closes the water supply electric valve and the water return electric valve, opens the self-circulation water pump (8) and opens the self-circulation electric valve;
when the dew point temperature t isLWhen the temperature is lower than the water supply temperature t1 and the indoor temperature is higher than or equal to the upper limit value of the room temperature, the control device adjusts and controls the operation of the freezing and dehumidifying part and opens the water supply electric valve and the water return electric valve to the maximum opening; if the indoor temperature is more than or equal to the set value of the room temperature and is lower than the upper limit value of the room temperature, the control device closes the freezing and dehumidifying part and carries out opening degree regulation control on the water supply electric valve and/or the water return electric valve; and if the indoor temperature is lower than the set value of the room temperature, the control device closes the freezing and dehumidifying part and opens the water supply electric valve and/or the water return electric valve of the water supply branch of the low-temperature radiation plate to the minimum opening.
8. A room air-conditioning system as claimed in claim 1, wherein said fresh air means further comprises a carbon dioxide concentration detector (7), said carbon dioxide concentration detector (7) being disposed indoors, and said control means controls the operation of said fresh air means in accordance with the carbon dioxide concentration value received from the carbon dioxide concentration detector (7).
9. A room air-conditioning system as claimed in claim 8, characterized in that the fresh air means further comprises a fresh air line regulating valve which is provided on the fresh air line (2),
the control device compares the detected carbon dioxide concentration value with a carbon dioxide concentration set value, and if the detected carbon dioxide concentration value is lower than the carbon dioxide concentration set value, the control device closes the fresh air pipeline regulating valve; if the detected carbon dioxide concentration value is higher than the carbon dioxide concentration set value and lower than the carbon dioxide concentration maximum limit value, the control device adjusts the opening degree of the fresh air pipeline adjusting valve; and if the detected carbon dioxide concentration value is higher than the maximum limit value of the carbon dioxide concentration, the control device opens the fresh air pipeline regulating valve to the maximum opening.
CN202011605334.3A 2020-12-28 2020-12-28 Indoor air-conditioning system Pending CN114688691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011605334.3A CN114688691A (en) 2020-12-28 2020-12-28 Indoor air-conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011605334.3A CN114688691A (en) 2020-12-28 2020-12-28 Indoor air-conditioning system

Publications (1)

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CN114688691A true CN114688691A (en) 2022-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116931629A (en) * 2023-09-18 2023-10-24 湖南朗赫科技有限公司 Control method, system and storage medium for preventing indoor moisture regain and dew condensation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116931629A (en) * 2023-09-18 2023-10-24 湖南朗赫科技有限公司 Control method, system and storage medium for preventing indoor moisture regain and dew condensation
CN116931629B (en) * 2023-09-18 2024-01-12 湖南朗赫科技有限公司 Control method, system and storage medium for preventing indoor moisture regain and dew condensation

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