Radiant Air Conditioning System for Controlling Comfortable and Healthy Indoor Environment Based on Infrared Sensing Technology

Abstract

A radiant air conditioning system for controlling comfortable and healthy indoor environment based on infrared sensing technology is disclosed, which comprises air source heat pump outdoor unit, plate evaporator, circulating water pump, etc. Accurate control of air humidity by installing an indoor dehumidification terminal can reduce the surface temperature of radiant cooling terminal and increase the installed area, which will significantly improve the radiant heat exchange between the terminal surface and the human body surface. Infrared sensor technology, which is adopted to obtain the number of indoor occupants and the required outdoor air flow rate, is integrated with a decoupling control of the indoor humidity and air freshness for the accurate control of outdoor air flow rate, and then the supply outdoor air temperature and humidity are regulated for the accurate control of indoor health level.

Claims

1. A radiant air conditioning system for controlling comfortable and healthy indoor environment based on infrared sensing technology, wherein the radiant air conditioning system for controlling comfortable and healthy indoor environment is mainly composed of air source heat pump outdoor unit, air source heat pump indoor plate evaporator, water circulating pump, water mixing valve, water mixing pump, air source heat pump indoor finned evaporator, air source heat pump indoor finned condenser, fan, damper, unfolded installation dehumidified fan coil, radiant floor, exhaust outlet, radiant ceiling, outdoor air inlet, air speed sensor, temperature and humidity sensor and infrared sensor; the air source heat pump outdoor unit is mainly consisted of an outdoor condenser and a compressor, which are respectively connected with the indoor plate evaporator, the air source heat pump indoor finned evaporator and the air source heat pump indoor finned condenser through refrigerant tubes; the air source heat pump indoor plate evaporator is connected with water circulating pump through cold water pipes; the water circulating pump is connected with the water mixing valve and the water mixing pump; the water mixing pump is respectively connected with the unfolded installation dehumidified fan coil, the radiant floor and the radiant ceiling; the air source heat pump indoor finned evaporator and the air source heat pump indoor finned condenser are connected with the fans and the damper through air ducts, and the damper is connected with the outdoor air inlet; the air speed sensor, temperature and humidity sensor and infrared sensor are connected with control center of the air conditioning system through signal lines; the control center of the air conditioning system is connected with the damper, the unfolded installation dehumidified fan coil and the water mixing valve.

2. The radiant air conditioning system for controlling comfortable and healthy indoor environment according to claim 1, wherein, the average surface temperature of human body is obtained by monitoring the human body surface temperature using the infrared sensor, and then comparing with the set value for cooling or dehumidifying to keep the human body surface temperature at a comfortable level; cooling is achieving by transferring the cooling capacity generated by the air source heat pump indoor plate evaporator to the radiant terminal surface through the radiant floor and the radiant ceiling, and then dealing with the sensible heat generated by the human body surface through radiant heat exchange between the radiant terminal surface and the human body surface; dehumidifying is achieving by transferring the cooling capacity generated by the air source heat pump indoor plate evaporator to coil surface through the unfolded installation dehumidified fan coil, and then decreasing the supply air humidity with condensation and dehumidification and supplying it into the room to deal with the latent heat generated by the human body surface.

3. The radiant air conditioning system for controlling comfortable and healthy indoor environment according to claim 1, wherein the number of indoor occupants and the required outdoor air flow rate are obtained by monitoring the human body surface temperature using the infrared sensors, and comparing with the set value to adjust the outdoor air flow rate for keeping human body at a healthy level, the adjustment of outdoor air flow rate is achieved by sending the measured outdoor air flow rate air with the air speed sensors to the air conditioning system control center, which will adjust and control the opening degree of the damper; meanwhile, the supply outdoor air humidity is reduced by cooling and dehumidifying of the air source heat pump indoor finned evaporator, and then the supply outdoor air temperature is raised by heating of air source heat pump indoor finned condenser.

Description

DESCRIPTION OF DRAWINGS

[0014] FIG. 1. Schematic diagram of distribution system and cold source of the radiant air conditioning system for controlling comfortable and healthy indoor environment of the present invention.

[0015] FIG. 2. Schematic diagram of indoor terminals of the radiant air conditioning system for controlling comfortable and healthy indoor environment of the present invention.

[0016] Where: 1 air source heat pump outdoor unit; 2 air source heat pump indoor plate evaporator; 3 water circulating pump; 4 water mixing valve; 5 water mixing pump; 6 air source heat pump indoor finned evaporator; 7 air source heat pump indoor finned condenser; 8 fan; 9 damper; 10 unfolded installation dehumidified fan coil; 11 radiant floor; 12 exhaust outlet; 13 radiant ceiling; 14 outdoor air inlet; 15 air speed sensor; 16 temperature and humidity sensor and 17 infrared sensor.

DETAILED DESCRIPTION

[0017] The specific embodiments of the present invention are further described below in conjunction with the drawings and technical solutions.

[0018] As shown in FIGS. 1 and 2, a radiant air conditioning system for controlling comfortable and healthy indoor environment based on infrared sensing technology is mainly composed of air source heat pump outdoor unit 1, air source heat pump indoor plate evaporator 2, water circulating pump 3, water mixing valve 4, water mixing pump 5, air source heat pump indoor finned evaporator 6, air source heat pump indoor finned condenser 7, fan 8, damper 9, unfolded installation dehumidified fan coil 10, radiant floor 11, exhaust outlet 12, radiant ceiling 13, outdoor air inlet 14, air speed sensor 15, temperature and humidity sensor 16 and infrared sensor 17.

[0019] As shown in FIG. 1, the air source heat pump outdoor unit 1 is mainly consisted of an outdoor condenser and a compressor, which are respectively connected with the air source heat pump indoor plate evaporator 2, the air source heat pump indoor finned evaporator 6 and the air source heat pump indoor finned condenser 7 through refrigerant tubes. The air source heat pump indoor plate evaporator 2 is connected with the water circulating pump 3 through cold water pipes. The water circulating pump 3 is connected with the water mixing valve 4 and the water mixing pump 5. The air source heat pump indoor finned evaporator 6 and the air source heat pump indoor finned condenser 7 are connected with the fan 8 and the damper 9 through air ducts.

[0020] As shown in FIG. 2, the water mixing pump 5 is respectively connected with the unfolded installation dehumidified fan coil 10, the radiant floor 11 and the radiant ceiling 13. The air source heat pump indoor finned evaporator 6 and the air source heat pump indoor finned condenser 7 are connected with the fan 8 and the damper 9 through the air ducts, and the damper 9 is connected with the outdoor air inlet 14. The air speed sensor 15, temperature and humidity sensor 16 and infrared sensor 17 are connected with control center of the air conditioning system through the signal lines. The control center of the air conditioning system is connected with the damper 9, the unfolded installation dehumidified fan coil 10 and the water mixing valve 4.

[0021] The control process of human body surface temperature and comfort level is to mix water generated by the air source heat pump indoor plate evaporator 2 and return water from unfolded installation dehumidified fan coil 10, radiant floor 11 and radiant ceiling 13 through the mixing water valve 4, and send it into unfolded installation dehumidified fan coils 10, radiant floor 11 and radiant ceiling 13, and then adjust the opening degree of mixing water valve 4 and fan speed of unfolded installation dehumidified fan coil 10 according to the difference between measured and set value of indoor temperature and humidity sensor 16 and infrared sensor 17. Cooling is achieving by transferring the cooling capacity generated by the air source heat pump indoor plate evaporator 2 to the radiant terminal surface through the radiant floor 11 and the radiant ceiling 13, and then dealing with the sensible heat generated by the human body surface through radiant heat exchange between the radiant terminal surface and the human body surface. Dehumidifying is achieving by transferring the cooling capacity generated by the air source heat pump indoor plate evaporator 2 to coil surface through the unfolded installation dehumidified fan coil 10, and then decreasing the supply air humidity with condensation and dehumidification and supplying it into the room to deal with the latent heat generated by the human body surface, so as to realize the accurate control of the human body surface temperature and comfort level.

[0022] The control process of the outdoor air flow rate and healthy level is to supply outdoor air for cooling and dehumidifying through the air source heat pump indoor finned evaporator 6 by fan 8, and then supply outdoor air for heating through air source heat pump indoor finned condenser 7 and out exhaust outlet 14 to indoor. Meanwhile, infrared sensor 17 was used to monitor the surface temperature of the human body, and the number of indoor occupants and the required outdoor air flow rate were obtained through the algorithm, then the opening degree of the damper 9 was adjusted according to the measured value of the air speed sensor 15 to achieve accurate control of the outdoor air flow rate and health level.

[0023] In view of the above ideal embodiment of the present invention, those skilled in the art can completely make various changes and modifications without deviating from the technical idea of the invention based on the above described content. The technical scope of the invention is not limited to the contents of the specification, but must be determined according to the scope of claims.