CN201173535Y

CN201173535Y - Central air conditioning system

Info

Publication number: CN201173535Y
Application number: CNU2008200444977U
Authority: CN
Inventors: 叶嘉明; 汪大权
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-04
Filing date: 2008-03-04
Publication date: 2008-12-31
Anticipated expiration: 2018-03-04

Abstract

The utility model provides an energy-saving central air conditioning system capable of controlling the air conditioning temperature and the temperature difference between the supplied water and the return water. The energy-saving central air conditioning system comprises a cold water source and/or a hot water source and a circulating water pump, a circuiting pipeline and a temperature control device, wherein, the circulating water pump adjusts the temperature of the cold water and/or the hot water by the circulating pipeline through the tail end of the air conditioner, the temperature control device consists of a temperature sensor arranged in the controlled air conditioner area, a controller and a temperature adjustment executing mechanism; an inlet and an outlet ends of the circulating pipe which pass through the tail end of the air conditioner are respectively provided with a water supply temperature sensor and a return water temperature sensor and are in electric connection with the controller of the temperature control device by a signal wire. The central air conditioning system not only has the function of the prior temperature control device but also controls the temperature difference between the incoming water and the outgoing water through the tail end of the air conditioner, realizes the dynamic balance of the water power of the air conditioner water system, solves the problem of maladjusted water power with the smallest cost, ensures that the water system distributes the water amount according to needs, matches with the automatic frequency conversion flow conversion control of the air conditioner circulating water pump, and finally fulfills the purpose for saving energy consumption.

Description

A kind of central air conditioner system

Technical field

The utility model relates to a kind of central air conditioner system, especially relates to a kind of energy-conservation central air conditioner system that can control air-conditioner temperature and supply and return water temperature difference simultaneously.

Background technology

In with the central air conditioner system of water as heat exchange carrier, the control of the temperature of air conditioning area is to agitate cold and hot wind to come regulating and controlling temperature by flow-control and blower fan to the water route.Water circulating pump pumps cold or hot water is assigned to each air conditioner end equipment by waterway pipe output, the thermal power of end-equipment depends on supply and return water temperature and discharge, need control just these parameters and can meet the requirements of room temperature, the temperature control equipment in the air-conditioning system is to agitate cold and hot wind to come regulating and controlling temperature by flow-control and blower fan to cold in the water route or hot water.Applied temperature control equipment in the existing air conditioner end equipment is divided into dual mode for the control in water route: a kind of mode is on-off type control, according to the logical relation of controlled air themperature and design temperature, controls the break-make of water valve; Another kind of mode is that proportion expression is regulated, and carries out computing according to the difference of controlled air themperature and design temperature, and the aperture of regulating water valve according to operation result output control signal is carried out ratio to the water yield and regulated then.These two kinds of control modes all are the temperature control of serving controlled air conditioning area air, can satisfy the requirement of general comfort air conditioning system basically.

Temperature control equipment formation terminal in the existing air-conditioning system can be divided into three parts: controlled air conditioning area temperature sensor, controller and executing agency.Temperature sensor is used to measure the air themperature of controlled air conditioning area; Control program is arranged in the controller and have and show and guidance panel; Executing agency is blower fan and the electrically operated valve and the valve driver that are installed on the water route, is used for controlling opening of valve.Controller carries out computing according to the measured temperature of air conditioning area temperature sensor that receives and the difference of design temperature, output drive signal also promptly regulates discharge for the electrically operated valve controlling opening of valve, in order to reach the function of regulating controlled air conditioning area air themperature.Attemperating unit is widely used in water as in the terminal control system of the central air-conditioning of heat exchange carrier, and effect is to make the temperature of controlled air conditioning area can be identical with set temperature value.

But existing air conditioning terminal temperature control equipment has following shortcoming: the air themperature that the purpose of attemperating unit control only is to regulate controlled air conditioning area, regulate or the ratio adjusting for the switch of the water yield, all be the purpose of serving consistent controlled air conditioning area air themperature, the starting point of control does not also lie in energy-conservation.Not control of maximum amount of water to the air conditioner end equipment of flowing through, do not solve the problem of air-conditioner water system hydraulic misadjustment, can not solve the problem of the little temperature difference of the big flow of air-conditioner water system, cause the water pump of air-conditioning system to carry that coefficient is low, energy consumption is big, finally cause the air-conditioning system operation energy consumption high.In addition, existing central air-conditioning temperature controller can not be judged the changes in temperature mode of operation of central air-conditioning automatically.

The utility model content

Technical problem to be solved in the utility model just provides a kind of need not existing equipment is done big change, with regard to solving air-conditioner water system hydraulic misadjustment problem low-cost, effectively, realizes the central air conditioner system of hydropower dynamic balancing and energy efficient.

For solving the problems of the technologies described above, the technical scheme that the utility model is taked is: a kind of central air conditioner system, comprise cold and/or thermal water source and water circulating pump, circulating line and attemperating unit, water circulating pump with cold and/or hot water by the circulating line air conditioner end equipment temperature adjustment of flowing through, attemperating unit is by temperature sensor that is installed on controlled air conditioning area and controller, executing agency forms, it is characterized in that: the circulating line arrival end of the described air conditioner end equipment of flowing through is equipped with the supply water temperature sensor, the port of export is equipped with the return water temperature sensor, and each temperature sensor has holding wire to be electrically connected with the attemperating unit controller.

Described executing agency is installed in flow control valve on the pipeline and/or the blower fan in the terminal fan coil.

Described controller comprises analog-to-digital conversion module and central processing element.

After having taked abovementioned technology, the temperature controller of this central air conditioner system, at first the air themperature value of the controlled air conditioning area of the temperature of the controlled air conditioning area that measures and user's setting is compared computing, give executing agency according to the actual conditions output drive signal, make the air themperature of controlled air conditioning area constant at the design temperature point by regulating executing agency.

Meanwhile, temperature controller also confession, the monitoring of return water temperature sensor of being equipped with respectively of the circulating line gateway end by the air conditioner end equipment of flowing through supply water, return water temperature, automatically judge that current air-conditioning system is to be in refrigeration or to heat state, and the relation of more current automatically water supply, return water temperature difference and setting value, when reaching, temperature approach do not regulate executing agency when requiring automatically, the circulation water yield is changed, the variation of the water yield increases temperature difference or reduces, and finally reaches the purpose of regulating confession, return water temperature difference.

Beneficial effect: the existing existing air conditioning area temperature control of this central air conditioner system function, controllable flow is through the water-in and water-out temperature difference and the output of air conditioner end equipment again, make the hydropower dynamic balancing of air-conditioner water system be more prone to realize, solved the difficult problem of hydraulic misadjustment with very little cost, guaranteed the water system distribution according to need water yield, cooperate the flow-control of air-conditioner circulating water pump, finally realize the purpose of energy efficient.In addition, the temperature controller of this central air conditioner system supplies water by measuring, return water temperature, judges automatically that according to water temperature current air-conditioning system is to be in refrigeration or to heat state.

Description of drawings

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Fig. 1 is the structural principle schematic diagram of the utility model embodiment 1;

Fig. 2 is the circuit block diagram of the utility model embodiment 1;

Fig. 3 is the circuit diagram of the utility model embodiment 1.

Fig. 4 is the central management unit circuit diagram of the utility model embodiment 1;

Fig. 5 is the structural principle schematic diagram of the utility model embodiment 2.

Among the figure: 1-cool water circulating pipe road, 2-hot water circuit pipeline, the 3-attemperating unit, 4-is installed on the temperature sensor of controlled air conditioning area, 5-cold water supply water temperature sensor, 6-cold-water return temperature sensor, 7-hot water supply water temperature sensor, 8-hot water backwater temperature sensor, 9-electric flow control valve, 10-blower fan.

The specific embodiment

As shown in Figures 1 to 4, this central air conditioner system embodiment 1 is the air-conditioning system of 4 control, comprise cold water and thermal water source, water circulating pump with cold water and hot water respectively by hot water or cold water's circulating

line

1,2 air conditioner end equipment temperature adjustment of flowing through, attemperating unit by the temperature sensor 4 that is installed on controlled air conditioning area (measurement return air temperature sensor) and controller 3, executing agency-be installed on the pipeline flow control valve 9 and the blower fan 10 in the terminal fan coil form, controller comprises analog-to-digital conversion module and central processing element; Arrival end is equipped with cold water supply water temperature sensor 5 in the cool water circulating pipe road of the air conditioner end equipment of flowing through, and the port of export is equipped with the cold-water return temperature sensor; Hot water circuit pipeline arrival end is equipped with hot water supply water temperature sensor 7, the port of export is equipped with hot water backwater's temperature sensor 8; Each temperature sensor has holding wire to be electrically connected with the attemperating unit controller.

When the air themperature of controlled air conditioning area departs from design temperature when big, for example the air themperature of controlled air conditioning area is higher than the value of a default of design temperature under the refrigerating state, when perhaps the air themperature of controlled air conditioning area is lower than the value of a default of design temperature under the state of heating, the aperture of temperature controller control dynamoelectric water valve, make the circulation water yield be in maximum rating, the preferential air themperature of controlled air conditioning area that guarantees reaches setting value, after the air themperature of controlled air conditioning area reached setting value, it is poor that temperature controller is controlled supply and return water temperature again.

Each temperature sensor is linked into the module of the analog quantity/digital quantity conversion in the circuit, and temperature information is converted into digital quantity by circuit and is transferred to central management unit (hereinafter to be referred as CPU).CPU is according to the temperature of current measurement, and the output digital quantity drives the operation of executing agency's (motor-driven valve and blower fan) to photoelectricity coupled power driver element.There are display unit and push-button unit that man-machine interface is provided on the temperature controller, are used for the demonstration and the setting of each quantity of state.

Described temperature controller includes executing agency's drive circuit module and temperature measuring circuit module, guidance panel circuit module.

Executing agency's drive circuit module comprises blower fan drive circuit module and motor-driven valve drive circuit module: the Q1/Q2/Q3 triode of blower fan drive circuit module drives the U5/U6/U7 relay respectively, D6/D7/D8 diode pair relay is protected, be used for suppressing of the backward voltage inhibition of blower fan inductive load switch for relay and triode, three relay control power voltage signal fans can three shelves speed move blower fan; When blower fan is the variable frequency adjustment type, director demon control output 0-10V voltage or 4-20mA current signal, the rotating speed of control blower fan; The R13-R16 of motor-driven valve drive circuit module drives photoelectrical coupler U8-U11 respectively; U8-11 drives controllable silicon U12-U15 more respectively; the power output voltage signal is given motor-driven valve executing agency; in order to regulate the aperture of executing agency; each controllable silicon all has a capacitance-resistance surge voltage to suppress circuit, and the protection controllable silicon is not subjected to the influence of fluctuations of external electrical network voltage.Water valve is external.

Cold for this example, the four control central air-conditioning application systems that hot water pipeline separates, external 5 temperature sensors of temperature measuring circuit module, be respectively applied for and measure the cold water supply water temperature, the cold-water return temperature, the hot water supply water temperature, hot water backwater's temperature and controlled air conditioning area temperature, temperature sensor is connected to central processing unit U4 through holding circuit and rc filter circuit, U4 contains inside the analog quantity/digital quantity converter of one 10 bit resolution, can be converted to data signal to temperature signal, D12-D18 is that transient voltage suppresses diode, be used for protecting temperature measuring circuit not damaged by outside overvoltage, R40, R32, C13 etc. form low-pass filter circuit, to suppress the influence of external interference signals for temperature sensor;

The external power source of power circuit module is introduced by J1; R1 is a piezo-resistance; be used for overvoltage protection; the TR1 transformer carries out voltage transformation; make the external high pressure power supply be converted to low-tension supply; the D1-D4 rectification; C1, C2 filtering; U1 is that variable voltage source, output direct current 12V voltage signal give relay as driving power; U2 is a fixed voltage source; output voltage signal is as the power supply of all digital circuits, and the wave conversion processing is as the power supply of analog circuit after filtration, and J5 is used to connect lead to guidance panel.

The J5 of guidance panel circuit module is power supply and communication interface, is used for connecting the control drive part.U3 is a central processing unit, is used for display driver, key scan, luminous tube driving, and LCD is a LCD panel, and R9, Q1 triode driving LED luminous tube illuminate liquid crystal, and U5 is used for remote control and receives.

That shown in Figure 5 is the utility model embodiment 2, be that with example 1 difference system is two shared control central air-conditioning application systems of hot water or cold water's pipeline, the temperature measuring circuit module only needs a supply water temperature sensor, a return water temperature sensor and a controlled air conditioning area air temperature sensor are measured, in the module declaration that top paragraph is described, the circuit function explanation is identical, has just reduced the relevant circuit of No. 2 temperature sensors.

Claims

1, a kind of central air conditioner system, comprise cold water source and/or thermal water source and water circulating pump, circulating line and attemperating unit, water circulating pump passes through the circulating line pump through the air conditioner end equipment temperature adjustment with cold water and/or hot water, attemperating unit is made up of the temperature sensor that is installed on controlled air conditioning area and controller, executing agency, it is characterized in that: the circulating line arrival end of the described air conditioner end equipment of flowing through is equipped with the supply water temperature sensor, the port of export is equipped with the return water temperature sensor, and each temperature sensor has holding wire to be electrically connected with the attemperating unit controller.

2, central air conditioner system according to claim 1 is characterized in that: described executing agency is flow control valve and/or the blower fan that is installed on the pipeline.

3, central air conditioner system according to claim 2 is characterized in that: described temperature controller includes executing agency's drive circuit module, temperature measuring circuit module, guidance panel circuit module:

Executing agency's drive circuit module comprises blower fan drive circuit module and motor-driven valve drive circuit module, the Q1/Q2/Q3 triode of blower fan drive circuit module drives the U5/U6/U7 relay respectively, D6/D7/D8 diode pair relay is protected, be used for suppressing of the backward voltage inhibition of blower fan inductive load switch for relay and triode, three relay control power voltage signal fans can three shelves speed move blower fan; When blower fan is the variable frequency adjustment type, director demon control output 0-10V voltage or 4-20mA current signal, the rotating speed of control blower fan; The R13-R16 of motor-driven valve drive circuit module drives photoelectrical coupler U8-U11 respectively, U8-11 drives controllable silicon U12-U15 more respectively, the power output voltage signal is given the motor-driven valve actuator, in order to regulate the aperture of actuator, each controllable silicon all has a capacitance-resistance surge voltage to suppress circuit, and the protection controllable silicon is not subjected to the influence of fluctuations of external electrical network voltage;

Temperature sensor is connected to central processing unit U4 through holding circuit and rc filter circuit, U4 contains inside the analog quantity/digital quantity converter of one 10 bit resolution, can be converted to data signal to temperature signal, D12-D18 is that transient voltage suppresses diode, be used for protecting temperature measuring circuit not damaged by outside overvoltage, R40, R32, C13 etc. form low-pass filter circuit, to suppress the influence of external interference signals for temperature sensor;

The external power source of power circuit module is introduced by J1, R1 is a piezo-resistance, be used for overvoltage protection, the TR1 transformer carries out voltage transformation, make the external high pressure power supply be converted to low-tension supply, the D1-D4 rectification, C1, C2 filtering, U1 is that variable voltage source, output direct current 12V voltage signal give relay as driving power, U2 is a fixed voltage source, output voltage signal is as the power supply of all digital circuits, and the wave conversion processing is as the power supply of analog circuit after filtration, and J5 is used to connect lead to guidance panel; The J5 of guidance panel circuit module is power supply and communication interface, is used for connecting the control drive part.U3 is a central processing unit, is used for display driver, key scan, luminous tube driving, and LCD is a LCD panel, and R9, Q1 triode driving LED luminous tube illuminate liquid crystal, and U5 is used for remote control and receives.