CN205481582U - Constant -temperature -and -humidity air conditioning unit energy -saving control system based on many parameter variable adjustment - Google Patents

Abstract

The utility model discloses an energy-saving control system for a constant temperature and humidity air-conditioning unit based on variable parameter adjustment, which includes an air-conditioning unit, a detection device and a controller. The air inlet section is equipped with an air inlet, and the air inlet is equipped with an electric fresh air valve. The new return mixing section is equipped with a return air outlet, and the return air outlet is equipped with an electric return air valve, and the return air outlet is connected to the room through a return air pipe; the detection device includes the inlet air temperature Sensing, inlet air humidity sensor, return air temperature sensor and return air humidity sensor; controller and electric fresh air valve, electric return air valve, inlet air temperature sensor, inlet air humidity sensor, return air temperature sensor and return air humidity sensor Signal connection, used to control the opening of the electric fresh air valve and electric return air valve according to the inlet air temperature, inlet air humidity, return air temperature and return air temperature. The adjustable air-conditioning unit of the utility model is more matched with the end load, reduces system imbalance, saves energy consumption in operation, and achieves the purpose of energy saving.

Description

Energy-saving control system for constant temperature and humidity air conditioning units based on variable parameter adjustment

technical field

The utility model relates to the technical field of energy-saving control of constant-temperature and constant-humidity air-conditioning units, in particular to an energy-saving control system for constant-temperature and constant-humidity air-conditioning units based on variable parameter adjustment.

Background technique

Constant temperature and humidity air conditioners have strict requirements on indoor temperature, humidity fluctuations and regional deviation control, and can be widely used in electronics, optical equipment, medical and health, biopharmaceutical and other industries. Its function is to adjust the air temperature in the room and ensure air quality. For systems with air-conditioning accuracy requirements, an all-air system with constant temperature and humidity air-conditioning units can be used.

With the improvement of production process requirements, the requirements for the air environment in the production space are also getting higher and higher. The general control accuracy requirements of constant temperature and humidity air conditioning units are Δt=±1C, ΔΦ=±10%. The constant temperature and humidity air conditioning system requires that it can be adjusted with the changes of indoor and outdoor loads, and at the same time meet the indoor heat and humidity environment within the design deviation, and also reduce energy consumption and reduce environmental pollution. How to energy-saving and efficient operation while controlling humidity has become an important research topic.

In order to save the energy consumption of dealing with fresh air, the traditional air-conditioning system is designed to fix the fresh air volume at the minimum fresh air volume required by the indoor hygiene standard or the indoor pressure difference. There is no doubt that energy can be saved under typical winter and summer conditions. However, for the air conditioning and control in the transitional season, the equipment designed and selected according to the summer working conditions has a large capacity, and the energy consumption is large when operating under a small load, and the control is difficult. The air conditioning system and the fresh air system designed according to the minimum fresh air volume have limited fresh air volume and cannot be adjusted.

Some energy-saving companies have also tried variable air volume air conditioning technology. However, since the birth of variable air volume air conditioning technology, how to control the system's supply air temperature and humidity has not been well resolved.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide an energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment, which can ensure indoor air quality and reduce energy consumption.

The technical solution adopted by the utility model to solve the existing technical problems is: an energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment, including:

An air-conditioning unit, the air-conditioning unit includes an air inlet section and a fresh return air mixing section arranged in sequence along the fresh air flow direction; the air inlet section is provided with an air inlet, and the air inlet is provided with an electric fresh air valve, and the fresh return mixing section The section is provided with an air return port, the return air port is provided with an electric return air valve, and the return air port is connected to the room through a return air pipe;

A detection device, the detection device includes an air inlet temperature sensor for detecting the air inlet temperature in the air inlet section, an air inlet humidity sensor for detecting the air inlet humidity in the air inlet section, and an air inlet humidity sensor for detecting the return air temperature in the air return pipe The return air temperature sensor and the return air humidity sensor used to detect the return air humidity in the return air duct;

A controller, the controller is connected with the electric fresh air valve, the electric return air valve, the inlet air temperature sensor, the inlet air humidity sensor, the return air temperature sensor and the return air humidity sensor, and is used to , air inlet humidity, return air temperature and return air temperature control the opening of the electric fresh air valve and the electric return air valve.

Preferably, the air conditioner unit also includes an air supply section, the air inlet section, the fresh return air mixing section and the air supply section are sequentially arranged along the fresh air flow direction; the air supply section is provided with a blower, and the blower is provided with a A frequency converter for frequency conversion adjustment of the blower;

The controller is signal-connected to the frequency converter, and is used to control the frequency of the frequency converter to adjust the return air temperature, and then adjust the air supply volume of the blower.

Preferably, the air conditioning unit further includes a surface cooling section and a heating section, the surface cooling section is arranged between the fresh air mixing section and the air supply section, and the surface cooling section, air supply section and heating section are arranged along the The direction of fresh air flow is set sequentially;

A surface cooler is provided in the surface cooling section, an electric surface cooling valve is provided on the surface cooler, a heater is provided in the heating section, and an electric heating valve is provided on the heater;

The detection device also includes an air outlet temperature sensor for detecting the air outlet temperature on the air outlet side of the heating section;

The controller is signal-connected with the outlet air temperature sensor, the electric cooling valve and the electric heating valve, and is used to control the opening degrees of the electric cooling valve and the electric heating valve according to the outlet air temperature.

Preferably, the air conditioning unit further includes a humidification section, the humidification section is arranged between the air supply section and the heating section, a humidifier is arranged in the humidification section, and a humidification control is provided on the humidifier valve;

The detection device also includes an outlet air dew point temperature sensor for detecting the outlet air dew point temperature in the heating section, and a return air dew point temperature sensor for detecting the return air dew point temperature in the return air duct;

The controller is connected with the humidification control valve, the air outlet dew point temperature sensor and the air outlet dew point temperature sensor, and is used to control the electric surface cooling valve or the humidification control valve according to the outlet air dew point temperature and the return air dew point temperature of the opening.

Preferably, the humidifier is an electrode humidifier, a steam humidifier or a spray humidifier.

According to the energy-saving control system of the constant temperature and humidity air conditioner unit based on the adjustment of variable parameters provided by the utility model, through the real-time detection of the inlet air temperature, the inlet air humidity, the return air temperature and the return air temperature, and then through the controller according to the inlet air temperature, Inlet air humidity, return air temperature and return air temperature control the opening of the electric fresh air valve and electric return air valve, and then realize the proportional control of the fresh air return, that is, the adjustment is more matched with the end load, thus greatly reducing the system imbalance Phenomenon, save the energy consumption of the air conditioning system, and achieve the purpose of energy saving.

Description of drawings

Fig. 1 is a schematic structural diagram of an energy-saving control system for a constant temperature and humidity air-conditioning unit based on variable parameter adjustment according to an embodiment of the present invention;

Reference signs:

Air conditioning unit 10;

air inlet 101;

Electric fresh air valve 1011;

return air outlet 102;

Electric return air valve 1012;

return air pipe 1022;

Blower 103;

Inverter 1031;

surface cooler 104;

Electric surface cooling valve 1041;

Humidifier 105;

Humidification control valve 1051;

heater 106;

Electric heating valve 1061;

Inlet air temperature sensor 20;

Intake air humidity sensor 21;

Outlet air temperature sensor 22;

Air outlet dew point temperature sensor 23;

return air temperature sensor 24;

return air humidity sensor 25;

Return air dew point temperature sensor 26;

controller 30.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

In describing the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplified descriptions, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance.

In addition, terms such as "mounted", "connected", "connected" and "fixed" should be interpreted in a broad sense, for example, it may be a fixed connection or a detachable connection, or an integral Ground connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

Referring to FIG. 1 , the embodiment of the present invention provides an energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment, including an air-conditioning unit 10 , a detection device and a controller 30 .

Specifically, the air conditioning unit 10 includes an air inlet section and a fresh return air mixing section arranged in sequence along the fresh air flow direction. The air inlet section is provided with an air inlet 101, and the air inlet 101 is provided with an electric fresh air valve 1011, by adjusting the opening of the electric fresh air valve 1011, the air intake volume can be adjusted, and the new return mixing section is provided with a return air outlet 102 , the air return port 102 is provided with an electric return air valve 1012, and the return air port 102 is connected to the room through a return air pipe 1022, and the return air volume can be adjusted by adjusting the opening of the electric return air valve 1012.

The detection device includes an air inlet temperature sensor 20 for detecting the inlet air temperature in the air inlet section, an inlet air humidity sensor 21 for detecting the inlet air humidity in the air inlet section, and an air inlet humidity sensor 21 for detecting the return air temperature in the air return pipe 1022. A return air temperature sensor 24 and a return air humidity sensor 25 for detecting the return air humidity in the return air duct 1022 .

The controller 30 is connected with the electric fresh air valve 1011, the electric return air valve 1012, the intake air temperature sensor 20, the intake air humidity sensor 21, the return air temperature sensor 24 and the return air humidity sensor 25, for The opening degree of the electric fresh air valve 1011 and the electric return air valve 1012 are controlled by wind temperature, inlet air humidity, return air temperature and return air temperature.

That is to say, through the inlet air temperature sensor 20, the inlet air humidity sensor 21, the return air temperature sensor 24 and the return air humidity sensor 25 respectively detect the inlet air temperature, the inlet air humidity, the return air temperature and the return air temperature in real time, and then pass The controller 30 controls the opening of the electric fresh air valve 1011 and the electric return air valve 1012 according to the detected air inlet temperature, inlet air humidity, return air temperature and return air temperature to adjust the mixing ratio of the fresh air and the return air, thereby achieving The purpose of load matching is to reduce the imbalance of the system. In this way, the energy consumption of the air conditioning system is saved, which is more energy-saving.

In one embodiment of the present utility model, the air conditioning unit 10 further includes an air supply section, and the air inlet section, the fresh return air mixing section and the air supply section are sequentially arranged along the fresh air flow direction. The air supply section is provided with a blower 103, and the blower 103 is provided with a frequency converter 1031 for frequency conversion adjustment of the blower 103, and the air volume of the blower 103 can be changed by adjusting the frequency of the frequency converter 1031.

The controller 30 is in signal connection with the frequency converter 1031 , and is used to control the frequency of the frequency converter 1031 to adjust the return air temperature, and then adjust the air supply volume of the blower 103 .

That is to say, through the real-time detection of the return air temperature, the controller 30 controls the frequency converter 1031 to adjust the frequency according to the return air temperature, and finally realizes the adjustment of the air supply volume of the blower 103 . That is: the present embodiment controls the adjustment of the air supply volume of the air blower 103 through the real-time detection of the return air temperature, and then realizes the adjustment of the variable air volume under different conditions. For example, if the return air temperature is high, the frequency can be reduced by the frequency converter 1031, so that the air supply volume of the blower 103 is reduced. In this way, the working state of the air conditioning unit 10 is more adapted to the end load, thereby further reducing system energy consumption and achieving better performance. energy-saving effect.

In one embodiment of the present utility model, the air conditioning unit 10 also includes a surface cooling section and a heating section, the surface cooling section is arranged between the fresh air mixing section and the air supply section, the surface cooling section, the supply section The air section and the heating section are arranged in sequence along the fresh air flow direction.

A surface cooler 104 is arranged in the surface cooling section, and an electric surface cooling valve 1041 is arranged on the surface cooling device 104. By adjusting the opening degree of the electric surface cooling valve 1041, the cooling degree of the surface cooler 104 can be adjusted. A heater 106 is arranged in the heating section, and an electric heating valve 1061 is arranged on the heater 106. By adjusting the opening degree of the electric heating valve 1061, the heating temperature of the heater 106 can be adjusted.

The detecting device also includes an outlet air temperature sensor 22 for detecting the outlet air temperature on the air outlet side of the heating section. The controller 30 is in signal connection with the outlet air temperature sensor 22 , the electric cooling valve 1041 and the electric heating valve 1061 , and is used to control the opening degrees of the electric cooling valve 1041 and the electric heating valve 1061 according to the outlet air temperature.

That is to say, through the real-time detection of the outlet air temperature, the controller 30 is used to control the opening of the electric cooling valve 1041 and the electric heating valve 1061 according to the outlet air temperature, and then adjust the temperature of the surface cooler 104 and the heater 106, Finally, the adjustment of the outlet air temperature is realized. For example, if the outlet air temperature is high, the opening of the electric surface cooling valve 1041 can be controlled to increase, and the opening of the electric heating valve 1061 can be reduced, thereby reducing the outlet air temperature to the set temperature. In this way, the outlet air temperature can be more adapted to the end load, further reducing system energy consumption and achieving better energy-saving effects.

In one embodiment of the present utility model, the air conditioning unit 10 further includes a humidification section, the humidification section is arranged between the air supply section and the heating section, and a humidifier 105 is arranged in the humidification section, and the The humidifier 105 is provided with a humidification control valve 1051 , and by adjusting the opening of the humidification control valve 1051 , the humidification effect of the humidifier 105 can be adjusted. Preferably, the humidifier 105 is an electrode humidifier, a steam humidifier or a spray humidifier.

The detecting device also includes an outlet air dew point temperature sensor 23 for detecting the outlet air dew point temperature in the heating section, and a return air dew point temperature sensor 26 for detecting the return air dew point temperature in the return air pipe 1022 .

The controller 30 is signal-connected with the humidification control valve 1051, the air outlet dew point temperature sensor 23 and the air outlet dew point temperature sensor 23, and is used to control the electric surface cooling valve 1041 or The opening degree of the humidification control valve 1051.

That is to say, through the real-time detection of the dew point temperature of the outlet air and the dew point temperature of the return air, the controller 30 is used to control the opening of the electric surface cooling valve 1041 or the humidification control valve 1051 according to the dew point temperature of the outlet air and the dew point temperature of the return air, and then Control the cooling degree of the surface cooler 104 or the humidity of the humidifier 105 to finally realize the adjustment of the dew point temperature of the outlet air. The dew point temperature of the outlet air directly affects the relative humidity, and the control of the dew point temperature of the outlet air is conducive to obtaining stable humidity and reducing the adverse effects caused by the humidity load.

In summary, the energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment provided by the embodiment of the utility model can change the return air ratio, air volume, outlet air temperature and Air supply dew point temperature control, more matching with the load at the end. The operating energy consumption is greatly reduced, and the system operates more stably and efficiently while ensuring the indoor air quality. It also reduces system operation and maintenance costs.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be construed as limitations of the present utility model, and those skilled in the art will not depart from the scope of the present utility model. The above-mentioned embodiments can be changed, modified, replaced and modified within the scope of the present utility model under the principle and purpose.

Claims (5)

1. A constant temperature and humidity air-conditioning unit energy-saving control system based on variable parameter adjustment, characterized in that it includes: An air-conditioning unit, the air-conditioning unit includes an air inlet section and a fresh return air mixing section arranged in sequence along the fresh air flow direction; the air inlet section is provided with an air inlet, and the air inlet is provided with an electric fresh air valve, and the fresh return mixing section The section is provided with an air return port, the return air port is provided with an electric return air valve, and the return air port is connected to the room through a return air pipe; A detection device, the detection device includes an air inlet temperature sensor for detecting the air inlet temperature in the air inlet section, an air inlet humidity sensor for detecting the air inlet humidity in the air inlet section, and an air inlet humidity sensor for detecting the return air temperature in the air return pipe The return air temperature sensor and the return air humidity sensor used to detect the return air humidity in the return air duct; A controller, the controller is connected with the electric fresh air valve, the electric return air valve, the inlet air temperature sensor, the inlet air humidity sensor, the return air temperature sensor and the return air humidity sensor, and is used to , air inlet humidity, return air temperature and return air temperature control the opening of the electric fresh air valve and the electric return air valve. 2. The energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment according to claim 1, wherein the air-conditioning unit also includes an air supply section, the air inlet section, the new return air mixing section and The air supply section is arranged in sequence along the fresh air flow direction; the air supply section is provided with a blower, and the blower is provided with a frequency converter for frequency conversion adjustment of the blower; The controller is signal-connected to the frequency converter, and is used to control the frequency of the frequency converter to adjust the return air temperature, and then adjust the air supply volume of the blower. 3. The energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment according to claim 2, wherein the air-conditioning unit also includes a surface cooling section and a heating section, and the surface cooling section is arranged on the Between the fresh air mixing section and the air supply section, the surface cooling section, the air supply section and the heating section are sequentially arranged along the fresh air flow direction; A surface cooler is provided in the surface cooling section, an electric surface cooling valve is provided on the surface cooler, a heater is provided in the heating section, and an electric heating valve is provided on the heater; The detection device also includes an air outlet temperature sensor for detecting the air outlet temperature on the air outlet side of the heating section; The controller is signal-connected with the outlet air temperature sensor, the electric cooling valve and the electric heating valve, and is used to control the opening degrees of the electric cooling valve and the electric heating valve according to the outlet air temperature. 4. The energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment according to claim 3, wherein the air-conditioning unit further includes a humidification section, and the humidification section is arranged between the air supply section and the air-conditioning section. Between the heating sections, a humidifier is provided in the humidification section, and a humidification control valve is provided on the humidifier; The detection device also includes an outlet air dew point temperature sensor for detecting the outlet air dew point temperature in the heating section, and a return air dew point temperature sensor for detecting the return air dew point temperature in the return air duct; The controller is connected with the humidification control valve, the air outlet dew point temperature sensor and the air outlet dew point temperature sensor, and is used to control the electric surface cooling valve or the humidification control valve according to the outlet air dew point temperature and the return air dew point temperature of the opening. 5. The energy-saving control system for constant temperature and humidity air-conditioning units based on variable parameter adjustment according to claim 4, wherein the humidifier is an electrode humidifier, a steam humidifier or a spray humidifier.