CN201262697Y - Controller for water chilling unit host - Google Patents

Abstract

The utility model relates to a controller, in particular to a controller of a water chilling unit mainframe, which comprises an analog quantity input module, a digital quantity input module, an analog quantity output module, a digital quantity output module and a micro-processor. The controller is characterized in that a bidirectional communication module consisting essentially of MAX1487-typed integrated circuits is arranged; a pin 1 of the integrated circuit is connected with an RX1 interface of the micro-processor; pins 2 and 3 of the integrated circuit are connected with an R/T1 interface of the micro-processor together; a pin 4 of the integrated circuit is connected with a TX1 interface of the micro-processor; pins 6 and 7 of the integrated circuit are respectively connected with a bidirectional communication interface of end equipment by a resistance through a communication bus; alternatively, the pins 6 and 7 of the integrated circuit are connected with the bidirectional communication interface of the end equipment by wireless transmission equipment. The controller solves the technical problem that the mainframe and the end equipment can carry out bidirectional communication.

Description

The controller of handpiece Water Chilling Units main frame

Technical field:

The utility model is about controller, particularly about a kind of controller of handpiece Water Chilling Units main frame.

Background technology:

The controller of traditional handpiece Water Chilling Units is made up of power module 4, analog quantity load module 2, digital quantity input module 1, analog output module 5, digital quantity output module 6 and microprocessor 3 as shown in Figure 1, gather the running status of handpiece Water Chilling Units by analog quantity load module 2 and digital quantity input module 1, through with microprocessor 3 in after the duty set compares processing, directly send instruction by analog output module 5 and digital quantity output module 6 to the cold water main unit of air-conditioning system again, thereby realize control air-conditioning system.But the defective that the controller of this traditional handpiece Water Chilling Units exists is the air-conditioning system end-equipment is independent separately control operation, its running status can't be returned the controller of transporting to the handpiece Water Chilling Units main frame, therefore also just can't be from the angle of system optimization, coordinate work between each end-equipment and the main frame by the controller of main frame, for example main frame can't be regulated the size of its output energy according to the number that end-equipment is opened, with adaption demand, can only carry out energy adjustment according to the indirect variation of water temperature, this tends to because the inertia of water causes fluctuating temperature big, causes the comfortableness of air-conditioning system to reduce, energy consumption increases.In the winter time during standby; main frame can reduce with water temperature and start the anti-frost protection function; prevent that by pump operation water lines is icing; but often cause this protection can't circulate because of the water route losing efficacy owing to end-equipment still all is in closed condition this moment, causes the plate of main frame to change or the bursting by freezing of equipment such as pipeline.

Secondly, because the quantity of the end-equipment of air-conditioning system has ever-increasing trend, cause the quantity of information surge of input microprocessor simultaneously, and the input port of original microprocessor is limited.The controller of therefore existing handpiece Water Chilling Units can not adapt to the requirement of this development.

The utility model content:

The utility model purpose is to provide a kind of controller of handpiece Water Chilling Units main frame, solve the technical matters that main frame and end-equipment carry out both-way communication, make the microprocessor of controller can be when gathering the data of main frame self, by both-way communication the state of each end-equipment is collected and to focus on, and then send control command to each end-equipment, thereby the optimization of the system of realization, coordinate control to main frame self or by communication.

The technical scheme that the utility model solves the problems of the technologies described above is:

A kind of controller of handpiece Water Chilling Units main frame, comprise the analog quantity load module, digital quantity input module, analog output module, digital quantity output module and microprocessor, it is characterized in that: being provided with mainly by model is the both-way communication module that the integrated circuit of MAX1487 is formed, No. 1 pin of this integrated circuit links to each other with the RX1 interface of microprocessor, link to each other with microprocessor R/T1 interface jointly with No. 3 pin for its No. 2, No. 4 pin links to each other with microprocessor TX1 interface, No. 6 pin is connected with the both-way communication interface of end-equipment through communication bus by resistance respectively with No. 7 pin, and perhaps No. 6 pin are connected with the both-way communication interface of end-equipment by radio transmission apparatus with No. 7 pin.

In order to make technique scheme can handle a large amount of input informations in an orderly manner under the limited condition of microprocessor input interface, technique scheme also may further be:

Between the corresponding interface of the information output interface of analog quantity load module and digital quantity input module and microprocessor, be respectively arranged with multi-channel electronic switch.

The utlity model has following beneficial effect:

1. utilize bidirectional communication function, microprocessor can be calculated the size of required load according to the unlatching proportional meter of end-equipment, send instruction and control the output power of variable conpacitance compressor and constant volume compressor, realize that the main frame energy exports as required, to save energy consumption by the digital quantity output module.

2. by the both-way communication module, microprocessor can be gathered all terminal states, just can extrapolate current required discharge, sending running speed that instruction regulates water pump then carries out corresponding discharge and regulates this indirect measurement discharge mode and control, need use the discharge checkout equipment directly to measure the method for controlling with existing handpiece Water Chilling Units compares, its control is simple, the cost less investment.

3. treat that the opportunity water temperature descends when freezing winter, microprocessor can be opened water valve by a certain proportion of end-equipment of both-way communication module command, to guarantee the foundation of water cycle behind the starting mode of pump, prevents that effectively the water route from freezing and damage equipment.

4. use multi-channel electronic switch only need take an input interface of microprocessor, just can utilize the input of 8 signals of way realization of timesharing multichannel, the resource of having saved chip.

Description of drawings:

Fig. 1 is the circuit block diagram of existing handpiece Water Chilling Units console controller.

Fig. 2 is a circuit diagram of the present utility model.

Embodiment:

See also shown in Figure 2, the utility model comprises analog quantity load module 2, digital quantity input module 1, analog output module 5, digital quantity output module 6, microprocessor 3 and power module 4, the environment temperature of handpiece Water Chilling Units, leaving water temperature, return water temperature, coil temperature, outlet refrigerant temperature, suction temperature, delivery temperatures etc. are by analog quantity load module 2 input microprocessors 3, the compressor of handpiece Water Chilling Units, fan electromotor, water pump, high-voltage switch gear, low tension switch, the information of water route valve is then by digital quantity input module 1 input microprocessor 3, handle through the control program that microprocessor 3 is preset in it, then by the compressor in 6 pairs of handpiece Water Chilling Units air-conditioning systems of digital quantity output module, fan motor, the water route valve, water pump, the water loop electric heater sends instruction, send instruction so that handpiece Water Chilling Units is controlled by heating electric expansion valve or refrigeration electric expansion valve in 5 pairs of systems of analog output module, power module 4 is then supplied with working current to each module of controller and microprocessor.Above-mentioned analog quantity load module 2, digital quantity input module 1, analog output module 5, digital quantity input module 6, microprocessor 3 and power module 4 are the same with existing handpiece Water Chilling Units console controller, and it interconnects also identical, so this is no longer described in detail.

The utility model has been set up a both-way communication module 7, this both-way communication module 7 is the integrated circuit N1 of MAX1487 by model mainly, wherein integrated circuit N1 No. 1 pin links to each other with the RX1 interface of microprocessor 3, link to each other with the R/T1 interface of microprocessor 3 jointly with No. 3 pin for No. 2, No. 4 pin links to each other with the TX1 interface of microprocessor 3, and No. 6 pin is connected with the both-way communication interface of the end-equipment of air-conditioning system through communication bus XP7 or by radio transmission apparatus by resistance R respectively with No. 7 pin.

With a handpiece Water Chilling Units air-conditioning system that is made of the cold water main unit that comprises 1 variable conpacitance compressor and 1 constant volume compressor and 6 end-equipments is example, after system's energising, the microprocessor 3 of console controller is by both-way communication module 7, can learn that end-equipment is in the quantity of open state, only there is 1 to be in open state such as end-equipment, then open ratio=1/6=17%, it in the unlatching ratio in the microprocessor 3 of being arranged on 17% prediction scheme, leave shutdown command by 6 pairs of constant volume compressors of digital quantity output module, and the order of variable conpacitance compressor being sent this variable conpacitance compressor 34% capacity of output (be power system capacity 17%), it is 40% instruction that the water route valve is sent the unlatching ratio, and water pump is the instruction of low-speed running.If microprocessor 3 has learnt that by both-way communication module 73 end-equipments are in open state, then its calculating unlatching ratio is 1/2=50%, this microprocessor 3 is 50% prediction scheme in the unlatching ratio, send the order of output 100% capacity (be power system capacity 50%) by 6 pairs of variable conpacitance compressors of digital simulation output module, and the constant volume compressor is still sent shutdown command, but it is 50% instruction that the water route valve is then sent the unlatching ratio, and water pump still is in the instruction of low-speed running.After microprocessor 3 has learnt that by both-way communication module 75 end-equipments are in open state, obtaining the unlatching ratio as calculated is 5/6=83%, 3 of this microprocessors are that 83% prediction scheme is sent instruction to constant volume compressor, variable conpacitance compressor, water route valve and water pump respectively by digital quantity output module 6 in the unlatching ratio, make of 100% (be power system capacity the 50%) output of constant volume compressor with its capacity, make 66% (be power system capacity the 33%) output of variable conpacitance compressor with its capacity, water route valve opening 83%, water pump switch to and run up.Know all end-equipment shutdown when microprocessor 3 by both-way communication module 7, then successively send the instruction of closing to constant volume compressor, variable conpacitance compressor, water pump and water route valve by digital quantity output module 6.Therefore the end-equipment opening obtained by both-way communication module 7 of the utility model, unlatching ratio through microprocessor 3 computing systems, microprocessor 3 sends instruction by digital quantity output module 6 to corresponding topworks in the prediction scheme of this unlatching ratio again, the current size is exported and regulated to the realization energy on demand, make total system realize optimal control, reach energy-conservation, comfortable purpose.

Use the utility model to make the handpiece Water Chilling Units air-conditioning system of console controller; standby stage in the winter time; microprocessor 3 can be with the water temperature reduction by digital quantity and analog output module 6; 5 start the anti-frost protection facility; and judge by the end-equipment unlatching ratio that both-way communication module 7 is obtained whether water circuit system opens circuit; if the unlatching ratio is 0; promptly sending to some end-equipment controllers by both-way communication module 7 forces start to be issued an order; make the water route of air-conditioning system set up circulation; can prevent effectively that this anti-frost protection from can't circulate because of the water route lost efficacy, and reached the freezing accident of equipment such as preventing main frame or pipeline.

The utility model can also be provided with multi-channel electronic switch respectively between digital quantity input module 1, analog quantity load module 2 and microprocessor 3.Wherein the information input interface of multi-channel electronic switch links to each other with the information output interface of digital quantity input module 1 or analog quantity load module 2, the address code input end interface of multi-channel electronic switch links to each other with little processing 3 address code output interfaces, and the information output interface of multi-channel electronic switch then is connected with the information input terminal of little processing 3.No. eight electronic switches of forming by the CD4051 integrated circuit for example, eight input interfaces of its X0 to X7 are connected with the output interface of eight digital quantity input modules 1 or eight analog quantity load modules 2 respectively, wherein A, B, C address code input interface respectively with the corresponding connection of RJ4, RJ5, RJ6 address code output interface of microprocessor (for example PIC18F8722 integrated circuit) 3, its X output interface is connected with the AN1 input interface of microprocessor 3.So just can utilize 1 information input interface of microprocessor just can read eight different pieces of informations, reduce requirement, save cost microprocessor 3.

Claims (2)

1, a kind of controller of handpiece Water Chilling Units main frame, comprise the analog quantity load module, digital quantity input module, analog output module, digital quantity output module and microprocessor, it is characterized in that: being provided with mainly by model is the both-way communication module that the integrated circuit of MAX1487 is formed, No. 1 pin of this integrated circuit links to each other with the RX1 interface of microprocessor, link to each other with microprocessor R/T1 interface jointly with No. 3 pin for its No. 2, No. 4 pin links to each other with microprocessor TX1 interface, No. 6 pin is connected with the both-way communication interface of end-equipment through communication bus by resistance respectively with No. 7 pin, and perhaps No. 6 pin are connected with the both-way communication interface of end-equipment by radio transmission apparatus with No. 7 pin.

2, the controller of handpiece Water Chilling Units main frame according to claim 1 is characterized in that: be respectively arranged with multi-channel electronic switch between the corresponding interface of the information output interface of analog quantity load module and digital quantity input template and microprocessor.

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