CN201028095Y

CN201028095Y - Integrated electric switching valve

Info

Publication number: CN201028095Y
Application number: CNU200720149819XU
Authority: CN
Inventors: 蒋庆; 汤建斌; 蔡晋辉
Original assignee: Individual
Current assignee: HANGZHOU ZHONGJIU AUTOMATION CONTROL SYSTEM CO Ltd
Priority date: 2007-04-30
Filing date: 2007-04-30
Publication date: 2008-02-27
Anticipated expiration: 2017-04-30

Abstract

The utility model relates to an integrative electric switching valve. A stepping motor, a sliding block mechanism, a control module and a valve cavity are encapsulated inside a housing of the utility model, wherein, an intake duct and at least two eduction tubes are connected with the valve cavity, the sliding block mechanism is installed at the spout at which the intake duct and the valve cavity are connected. The control module comprises a power supply module providing the working power supply for the whole valve and a central processing unit which is connected with a sampling unit and a driving unit, ,wherein, the driving unit is connected with the stepping motor by the interface of the stepping motor which is connected with the sliding block mechanism, the control program is stored in the central processing unit. The drive and the control strategy of the stepping motor of the utility model can be completed by the control module of the valve itself, which improves the overcoatability between the valve and a refrigerator system makes the assembly of the refrigerator very convenient, improves the production efficiency significantly. Furthermore, the tie lines between the valve and the refrigerator system are reduced, and the driving signal transmission lines of the stepping motor are shortened; which simplifies the control of the refrigerator system, makes, the tie lines orderly, and effectively reduces the disturbance and the radicalization.

Description

The integrated electric switching valve

Technical field

The utility model relates to a kind of refrigerator component, relates in particular to a kind of integrated electric switching valve.

Background technique

In traditional refrigerator refrigeration system, the controlling component of refrigerant flow direction mostly is with two-bit triplet solenoid valve or bistable electromagnetic valve, and these two kinds of valves are because drive signal is an alternating signal, so interference is big, power consumption is big, the undesired signal of grid alternating current generation sometimes also can make valve produce misoperation.Over the past two years, refrigerator system begins to use a kind of novel dynamoelectric switching valve, a kind of " dynamoelectric switching valve " disclosed as Chinese patent literature CN200510060210.0, this valve utilizes the stepper motor principle, rotate with the coil drive rotor part, drive slide block, thus the break-make of control introducing port and a plurality of export mouths relation.Though this valve all improves a lot on allomeric function and performance, but also have following shortcoming: the control section of (1) valve separates from outside the valve body, a part that belongs to the refrigerator controller master control borad, at least need 2 power lines to link to each other between control section and the valve with 4 step motor drive signaling lines, control is complicated, the cost height; (2) because the drive signal of stepper motor is the square signal of certain sequential, and driving current reaches 0.1～0.3A, will certainly produce on long transmission line and disturb and radiation; (3) method for driving of dynamoelectric switching valve and strategy are all realized by the refrigerator controller master control borad, because the control circuit of different refrigerator manufacturer is different with controlling method, the characteristic that causes the valve of same specification to reflect on the refrigerator control panel of different size is inconsistent, therefore refrigerator manufacturer needs to change according to the valve that uses the structure and the program of refrigerator controller master control borad, thereby brings a lot of inconvenience for the assembling of refrigerator.

Summary of the invention

The utility model mainly solve existing dynamoelectric switching valve control complicated, have interference and radiation, assembling brings the technical problem of a lot of inconvenience to refrigerator; Provide a kind of control simple, effectively reduce and disturb and radiation, and need not changes in the refrigerator controller master control borad and can match with dynamoelectric switching valve, guarantee that refrigerator assembles integrated electric switching valve very easily.

Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals: the utility model comprises housing, be provided with the valve pocket that is connected with an ingress pipe and at least two delivery lines in the housing, the mouth of pipe place that delivery line links to each other with valve pocket is provided with the slide-block mechanism that links to each other with stepper motor, go back one in the described housing and be packaged with control module, described control module comprises and is connected with sampling unit, the central processing unit of driver element and the power module that working power is provided for whole valve, driver element links to each other with stepper motor, and the central processing unit internal memory contains control program.During the refrigerator assembling, sampling unit is linked to each other with the setting signal control piece of refrigerator.Sampling unit is gathered the state of setting signal and is sent to central processing unit, central processing unit is by being stored in analysis, computing, the processing of inner control program, produce the drive pulse signal of stepper motor, drive pulse signal drives the stepper motor rotation through the power amplification of over-drive unit again, the rotating band movable slider mechanism of stepper motor rotates synchronously, when slide-block mechanism turns to diverse location, can control the break-make relation of ingress pipe and each delivery line, make refrigerant medium need flow to the different warm areas of refrigerator by the user.After control module and jam pot cover are dressed up one, driving and control strategy thereof to stepper motor are all finished by the control module of valve self, for different refrigerator manufacturers, all only need provide the external setting-up signal, do not need the changes in the refrigerator master control borad, thereby make the refrigerator assembling very convenient, enhance productivity greatly.On the other hand, the drive signal transmission line of stepper motor is positioned at valve inside, has shortened length greatly, has effectively reduced interference and radiation, makes the running of motor more reliable.Valve and outside line make the refrigerator inside line more succinct when also having reduced simultaneously the assembling refrigerator, control simpler.

As preferably, described housing is provided with the four-core interface, and two cores of four-core interface link to each other with described sampling unit, and other two cores link to each other with described power module.During assembling, two cores that link to each other with power module in the four-core interface link to each other with the power-supply system of refrigerator, and two cores that link to each other with sampling unit link to each other with the setting signal control piece of refrigerator.Sampling unit has two signal input lines, this signal is the contact signal of Transistor-Transistor Logic level, the short circuit state of these two input lines and ground wire has four kinds of combinations: disconnected/disconnected, disconnected/weak point, weak point/weak point, short/disconnected, determined dynamoelectric switching valve that 4 kinds of switching modes are arranged, promptly the go side of introducing port and export mouth relation can have four kinds of states.Make control convenient.Adopt the four-core interface to be more convenient for assembling, cabling is clean and tidy, saves cost.

As preferably, link to each other by the stepper motor interface between described driver element and stepper motor.The assembling of guaranteeing valve is more convenient, guarantees that also the line of valve inside is more firm, also is convenient to maintenance.

The beneficial effects of the utility model are: by control module and jam pot cover are dressed up one, the driving and the control strategy thereof of realization stepper motor are all finished by the control module of valve self, for different refrigerator manufacturers, all only need provide the external setting-up signal, do not need the changes in the refrigerator master control borad, thereby make the refrigerator assembling very convenient, enhance productivity greatly; On the other hand, the drive signal transmission line of stepper motor is positioned at valve inside, has shortened length greatly, has effectively reduced interference and radiation, makes the running of motor more reliable; Valve only needs two power lines, two guide lines with outside line, and the control signal of guide line is the contact signal of Transistor-Transistor Logic level, has reduced interference and the radiation of valve to refrigerator system, also makes the refrigerator inside line more succinct, controls simpler.

Description of drawings

Fig. 1 is a kind of structural representation of the present utility model.

Fig. 2 is that a kind of circuit of the present utility model connects block diagram.

Fig. 3 is a kind of circuit theory diagrams of control module in the utility model.

Fig. 4 is a kind of software flow pattern of control program in the utility model.

1. housings among the figure, 2. ingress pipe, 3. delivery line, 4. stepper motor, 5. control module, 6. sampling unit, 7. driver element, 8. central processing unit, 9. power module, 10. four-core interface.

Embodiment

Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment 1: the integrated electric switching valve of present embodiment, as shown in Figure 1, one is packaged with stepper motor 4, slide-block mechanism, control module 5, valve pocket in the housing 1, is connected with an ingress pipe 2 and two delivery lines 3 on the valve pocket, and slide-block mechanism is installed on the mouth of pipe place that delivery line 3 links to each other with valve pocket.As shown in Figure 2, control module 5 comprises central processing unit 8 that is connected with sampling unit 6, driver element 7 and the power module 9 that working power is provided for whole valve, driver element 7 links to each other with stepper motor 4 by the stepper motor interface, stepper motor 4 links to each other with slide-block mechanism, and central processing unit 8 internal memories contain control program.A four-core interface 10 is installed on the housing 1, and two cores of four-core interface 10 link to each other with sampling unit 6, and other two cores link to each other with power module 9.

All elements are welded on the circuit board on the control module 5 in the present embodiment, as shown in Figure 3, power module 9 is made of diode D1, capacitor C 1, C2, C3, C4, voltage-stabiliser tube IC1, import by interface JP1 by 7～15VDC power supply that the refrigerator power-supply system provides, through D1 rectification, C1 and C2 filtering,, pass through the voltage transitions of voltage-stabiliser tube IC1 simultaneously for stepper motor provides DC12V operating voltage, generation+5VDC voltage is for other elements on the circuit board provide operating voltage.

Sampling unit 6 is made of resistance R 1, R2, capacitor C 5, C6, and two control signals of refrigerator control piece input are drawn two resistance values of R1, R2 by interface JP2 input and respectively.If the control signal terminal is unsettled, then sampling unit 6 is a high level with the connecting end of central processing unit 8, if control signal terminal and ground short circuit, then this is held and is low level, have four kinds of different combinations: height/height, high/low, low/low, low/height, and composite signal sent to central processing unit 8.

Central processing unit 8 is made of a slice R8C single-chip microcomputer, the 1st pin of single-chip microcomputer, the 32nd pin receive the input of the various combination signal of sampling unit 6, produce the motor driving pulse of certain sequential after the analysis of internal control program, calculating, processing, control step motor 4 turns to corresponding position.The software flow pattern of control program as shown in Figure 4, after powering on, the rotor that control program drives the earlier stepper motor position of making zero, detect the input signal of sampling unit, need rotation angle and direction according to this calculated signals rotor, drive motor rotates, and the storage motor position, after motor puts in place, detect the input signal of sampling unit again.When stepper motor was in hold mode, driving pulse all was a high level, guaranteed that the motor windings electric current is zero.The inner integrated EEPROM of R8C, stepper motor revolution once, R8C just is stored in rotation angle among the EEPROM, after re-powering next time, these data is accessed the assurance rotor position of suitably making zero again.

Driver element 7 is a slice intergrated circuit ULC2003, ULC2003 has 7 independent power amplification channels, link to each other with the stepper motor winding by stepper motor interface JP3 behind the driving pulse process chip ULC2003 that single-chip microcomputer R8C produces, the driving pulse of big electric current is provided for winding.

The rotating band movable slider mechanism of stepper motor 4 rotates synchronously, and slide-block mechanism turns to diverse location, controls the break-make relation of two delivery lines 3 and valve pocket, makes the refrigerant medium of refrigerator need flow to the different warm areas of refrigerator by the user.

The utility model has reduced the line of valve and refrigerator system, and the control signal that refrigerator offers valve is the contact signal of Transistor-Transistor Logic level, has shortened the step motor drive signal transmssion line, make control simple, line is clean and tidy, effectively reduces and disturbs and radiation, makes whole refrigerator system running more reliable.The more important thing is, the driving of stepper motor and control strategy thereof are all finished by the control module of valve self, and refrigerator manufacturer only need provide the external setting-up signal, do not need the changes in the refrigerator master control borad, thereby make the refrigerator assembling very convenient, enhance productivity greatly.

Claims

1. integrated electric switching valve, comprise housing (1), be provided with the valve pocket that is connected with an ingress pipe (2) and at least two delivery lines (3) in the housing (1), the mouth of pipe place that delivery line (3) links to each other with valve pocket is provided with the slide-block mechanism that links to each other with stepper motor (4), it is characterized in that going back in the described housing (1) one and be packaged with control module (5), described control module (5) comprises and is connected with sampling unit (6), the central processing unit (8) of driver element (7) and the power module (9) that working power is provided for whole valve, driver element (7) links to each other with stepper motor (4), and central processing unit (8) internal memory contains control program.

2. integrated electric switching valve according to claim 1, it is characterized in that described housing (1) is provided with four-core interface (10), two cores of four-core interface (10) link to each other with described sampling unit (6), and other two cores link to each other with described power module (9).

3. integrated electric switching valve according to claim 1 and 2 is characterized in that linking to each other by the stepper motor interface between described driver element (7) and stepper motor (4).