CN2886541Y - Automatic detection and control device for electronic multi-path expansion valve - Google Patents
Automatic detection and control device for electronic multi-path expansion valve Download PDFInfo
- Publication number
- CN2886541Y CN2886541Y CNU200620079927XU CN200620079927U CN2886541Y CN 2886541 Y CN2886541 Y CN 2886541Y CN U200620079927X U CNU200620079927X U CN U200620079927XU CN 200620079927 U CN200620079927 U CN 200620079927U CN 2886541 Y CN2886541 Y CN 2886541Y
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- China
- Prior art keywords
- expansion valve
- electric expansion
- chip microcomputer
- connects
- automatic detection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The utility model discloses an electric expansion valve automatic detection control device, comprising a button module, a display module and a master control circuit, a microchip is included in the master control circuit, the IO port of the microchip is connected with the button module, two A/D converter ends are connected with the sample signal output ends of two temperature sensors, one temperature sensor detects the coolant temperature before expansion valve choke, and the other temperature sensor detects the coolant temperature after expansion valve choke; the data signal output port and the clock signal output port of the microchip are correspondingly connected with the input port and the clock port of the register, the output port of the register is connected with the display device; the output IO port of the microchip is connected with the electric expansion valve to control the opening steps accurately. The detecting device of the utility model has higher automatic control level, the LED nixie light display has good man-machine interface, and the expansion valve openness debug and the parameter record are very convenient.
Description
Technical field
The utility model relates to a kind of detection control apparatus, specifically, relates to a kind of experimental provision of realizing that the open degree to the electric expansion valve of frequency-change air conditioner outdoor machine detects automatically and controls.
Background technology
At present, in the debug process of air-conditioner system, therefore the designer, can not hold the throttling action of expansion valve exactly owing to can't grasp the unlatching number of degrees of electric expansion valve accurately, intuitively, has brought inconvenience for technician's test job.In order to grasp the unlatching number of degrees of electric expansion valve independently, intuitively, exactly and it to be quantized, need a kind of experimental provision that can detect automatically, control to electric expansion valve.
Summary of the invention
The utility model is in order to solve in the prior art owing to can't grasp the unlatching number of degrees of electric expansion valve accurately, intuitively, thereby the problem that can not accurately hold the throttling action of expansion valve, a kind of novel electronic expansion valve automatic detection and control device is provided, realized Automatic Detection and Control effect by simple circuit configuration, convenience is provided for technician's test job the electric expansion valve open degree.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of electric expansion valve automatic detection and control device, comprise key-press module, display device and governor circuit, in described governor circuit, include a single-chip microcomputer, the IO mouth of described single-chip microcomputer connects key-press module, two analog to digital conversion ends connect the sampled signal output terminal of two temperature sensors, the refrigerant temperature of a temperature sensor before to the expansion valve throttling detects, and the refrigerant temperature of another temperature sensor after to the expansion valve throttling detects; The data-signal output terminal of single-chip microcomputer and clock signal output terminal respectively be connected corresponding of input end of register with clock end, the output terminal of register connects described display device; The output IO mouth of single-chip microcomputer connects described electric expansion valve.
As further qualification to technique scheme, described register is a shift register, include 8 altogether, be divided into two groups, every group 4, the shift register of each group all adopts the syndeton that seals in and go out, the input end of first shift register connects a circuit-switched data signal output part of single-chip microcomputer, its most significant digit output terminal connects the input end of a back shift register, thereafter, the most significant digit output terminal of previous shift register connects the input end of a back shift register, realizes connected in series between register; Each self-driven 8 charactron of the output terminal of described 8 shift registers; The clock end of each group shift register connects one road clock signal output terminal of single-chip microcomputer.Described charactron is 7 sections charactrons, and 8 output terminals of shift register and charactron 7 sections are connected with the point control end is corresponding.
As further limiting again to technique scheme, reset terminal at described single-chip microcomputer is connected with an electrify restoration circuit, in described reset circuit, include a positive-negative-positive triode, the emitter of described triode connects a direct current power supply, base stage connects described direct supply through divider resistance on the one hand, through another divider resistance ground connection, the collector of described triode connects the reset terminal of described single-chip microcomputer on the other hand.The output IO mouth of described single-chip microcomputer connects stepper motor in the described electric expansion valve through anti-phase driving circuit.
As the further qualification again to technique scheme, described temperature sensor adopts thermistor temperature sensor to realize; Key-press module adopts the matrix keyboard circuit to realize.The model of described single-chip microcomputer is HC908MR32, and the model of shift register is 74LS164.
Compared with prior art, advantage of the present utility model and good effect are: electric expansion valve open degree pick-up unit of the present utility model detects in real time by the temperature to expansion valve throttling rear and front end refrigerant, when temperature difference reaches setting value, the open degree of expansion valve is shown by the LED charactron, by the control parameters table, whether the performance index of determining expansion valve meet the demands, and with this complete machine quality of effectively having guaranteed the air-conditioning product, have made things convenient for technician's test job.Electric expansion valve automatic detection and control device of the present utility model has higher automatic control level, detection, control to the expansion valve open degree have higher reliability and stability, adopt the LED charactron to show and have good man computer interface, be convenient to the debugging and the reference record work of expansion valve open degree.
Description of drawings
Fig. 1 is the internal circuit schematic diagram of the utility model electric expansion valve automatic detection and control device.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done explanation in further detail.
Electric expansion valve automatic detection device of the present utility model can realize manually and automatic two kinds of detections, control mode, comprise matrix keyboard circuit, LED charactron display circuit, single-chip microcomputer and temperature sensor etc., the concrete syndeton of its each several part is referring to shown in Figure 1.
Among Fig. 1, the matrix keyboard circuit connects input end PTA4～PTA7, PTD0～PTD6, PTC0, the PTC2～PTC5 of single-chip microcomputer IC1, comprises selection key SW0～SW9, reset key RESET, affirmation button ENTER and the cancellation button CANCEL etc. of control expansion valve unlatching step number.Temperature sensor adopts thermistor temperature sensor to realize, the temperature of refrigerant before the throttling of a detection expansion valve, the temperature of refrigerant after another detection expansion valve throttling, its temperature sampling signal 2 pin by socket CN2, CN3 respectively connects analog to digital conversion end ATD1, the ATD0 of single-chip microcomputer IC1 respectively through the LC filtering circuit, the analog electrical signal of sampling is converted to digital signal provides temperature data for the internal processes of single-chip microcomputer IC1.It is the process chip realization of HC908MR32 that described single-chip microcomputer IC1 adopts model, and its data-signal output terminal PTA0 connects input end A, the B of shift register U9.In order effectively to save the IO mouth resource of single-chip microcomputer IC1, shift register U9～U12 is designed to the syndeton that seals in and go out, be input end A, the B that the most significant digit output terminal QH of previous shift register connects a back shift register, the clock end CLK of 4 shift register U9～U12 all links to each other with the clock signal output terminal RTA1 of single-chip microcomputer IC1, realizes its synchronization action.4 each self-driven one 7 sections charactron U1 of shift register U9～U12～U4 show, its 8 road output terminal QA～QH is connected with the point control end is corresponding with 7 sections of charactron U1～U4 respectively.Shift register U13～U16 has also adopted identical structure connected in series, wherein, input end A, the B of shift register U13 connects the data-signal output terminal PTA2 of single-chip microcomputer IC1, the clock signal output terminal PTA3 of single-chip microcomputer IC1 links to each other with the clock end CLK of 4 shift register U13～U16, realizes the synchro control to register U13～U16.IO mouth output terminal PTE4～PTE7 of described single-chip microcomputer IC1 is through anti-phase chip for driving U17 gang socket CN1, and then links to each other with the stepper motor of electric expansion valve, by the operation step number of control step motor, realizes the adjusting to the expansion valve open degree.
Crystal oscillator ATAL connects OSC1 and the OSC2 end of single-chip microcomputer IC1, and IC1 provides reference clock for single-chip microcomputer.Reset terminal RST at single-chip microcomputer IC1 is connected with an electrify restoration circuit, and described reset circuit is connected by a positive-negative-positive triode D1 to be realized.Wherein, emitter connection+5V the direct supply of triode D1, described+5V direct supply is through divider resistance R88, R68 ground connection, the connected node of divider resistance R88, R68 connects the base stage of triode D1, the collector of described triode D1 connects the reset terminal RST of single-chip microcomputer IC1, when pick-up unit powers on the other hand on the one hand through resistance R 67 ground connection through resistance R 87, control single chip computer IC1 accurately resets, and guarantees that system normally moves.
Electric expansion valve automatic detection device of the present utility model has manually and automatic two kinds of detections, control mode, when selecting manually control, set the unlatching step number of expansion valve by button SW0～SW9, at this moment, under arrange charactron U5～U8 setting value shown, on arrange charactron U1～U4 the actual unlatching step number of expansion valve shown.When selecting control automatically, last row's charactron U1～U4 shows the temperature sampling value of two temperature sensors, arranging charactron U5～U8 down shows the actual unlatching step number of expansion valve, during setting value in temperature difference reaches single-chip microcomputer IC1, the actual unlatching step number of record expansion valve, the control parameters table determines whether the performance index of expansion valve meet the demands, and checks the outgoing of air-conditioning product with this.
The utility model has been realized the automatic control of electric expansion valve open degree and accurately detection have greatly been made things convenient for technician's test job by adopting above-mentioned simple circuit configuration, has improved efficiency.Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (9)
1. electric expansion valve automatic detection and control device, comprise key-press module, display device and governor circuit, it is characterized in that: in described governor circuit, include a single-chip microcomputer, the IO mouth of described single-chip microcomputer connects key-press module, two analog to digital conversion ends connect the sampled signal output terminal of two temperature sensors, the refrigerant temperature of a temperature sensor before to the expansion valve throttling detects, and the refrigerant temperature of another temperature sensor after to the expansion valve throttling detects; The data-signal output terminal of single-chip microcomputer and clock signal output terminal respectively be connected corresponding of input end of register with clock end, the output terminal of register connects described display device; The output IO mouth of single-chip microcomputer connects described electric expansion valve.
2. electric expansion valve automatic detection and control device according to claim 1, it is characterized in that: described register is a shift register, include 8 altogether, be divided into two groups, every group 4, the shift register of each group all adopts the syndeton that seals in and go out, the input end of first shift register connects a circuit-switched data signal output part of single-chip microcomputer, its most significant digit output terminal connects the input end of a back shift register, thereafter, the most significant digit output terminal of previous shift register connects the input end of a back shift register, realizes connected in series between register; Each self-driven 8 charactron of the output terminal of described 8 shift registers; The clock end of each group shift register connects one road clock signal output terminal of single-chip microcomputer.
3. electric expansion valve automatic detection and control device according to claim 2 is characterized in that: described charactron is 7 sections charactrons, and 8 output terminals of shift register and charactron 7 sections are connected with the point control end is corresponding.
4. electric expansion valve automatic detection and control device according to claim 3 is characterized in that: the output IO mouth of described single-chip microcomputer connects stepper motor in the described electric expansion valve through anti-phase driving circuit.
5. electric expansion valve automatic detection and control device according to claim 4, it is characterized in that: the reset terminal at described single-chip microcomputer is connected with an electrify restoration circuit, in described reset circuit, include a positive-negative-positive triode, the emitter of described triode connects a direct current power supply, base stage connects described direct supply through divider resistance on the one hand, through another divider resistance ground connection, the collector of described triode connects the reset terminal of described single-chip microcomputer on the other hand.
6. electric expansion valve automatic detection and control device according to claim 1 is characterized in that: described temperature sensor adopts thermistor temperature sensor to realize.
7. electric expansion valve automatic detection and control device according to claim 1 is characterized in that: described key-press module adopts the matrix keyboard circuit to realize.
8. electric expansion valve automatic detection and control device according to claim 5 is characterized in that: the model of described single-chip microcomputer is HC908MR32.
9. electric expansion valve automatic detection and control device according to claim 5 is characterized in that: the model of described shift register is 74LS164.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620079927XU CN2886541Y (en) | 2006-01-06 | 2006-01-06 | Automatic detection and control device for electronic multi-path expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200620079927XU CN2886541Y (en) | 2006-01-06 | 2006-01-06 | Automatic detection and control device for electronic multi-path expansion valve |
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| Publication Number | Publication Date |
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| CN2886541Y true CN2886541Y (en) | 2007-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200620079927XU Expired - Lifetime CN2886541Y (en) | 2006-01-06 | 2006-01-06 | Automatic detection and control device for electronic multi-path expansion valve |
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| CN (1) | CN2886541Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424638A (en) * | 2012-05-15 | 2013-12-04 | 珠海格力电器股份有限公司 | System and method for processing control and detection data of electronic expansion valves |
| CN104374591B (en) * | 2014-11-13 | 2016-11-23 | 中国电器科学研究院有限公司 | A kind of ability measurement device of electric expansion valve |
-
2006
- 2006-01-06 CN CNU200620079927XU patent/CN2886541Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103424638A (en) * | 2012-05-15 | 2013-12-04 | 珠海格力电器股份有限公司 | System and method for processing control and detection data of electronic expansion valves |
| CN103424638B (en) * | 2012-05-15 | 2015-12-16 | 珠海格力电器股份有限公司 | Electronic expansion valve controls Measurement data-processing system and method |
| CN104374591B (en) * | 2014-11-13 | 2016-11-23 | 中国电器科学研究院有限公司 | A kind of ability measurement device of electric expansion valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: QINGDAO HISENSE AIR CONDITIONING CO. Free format text: FORMER OWNER: HAIXIN GROUP CO., LTD.; PATENTEE Effective date: 20071012 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20071012 Address after: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee after: Haisense Air Conditioner Co., Ltd., Qingdao Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Co-patentee before: Haisense Air Conditioner Co., Ltd., Qingdao Patentee before: Hisense Group Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: HISENSE( SHANDONG ) AIR CONDITIONING CO., LTD. Free format text: FORMER OWNER: QINGDAO HISENSE AIR CONDITIONING CO. Effective date: 20080425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080425 Address after: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Patentee after: Hisense (Shandong) Air-conditioning Co., Ltd. Address before: Shandong City, Qingdao province Jiangxi City Road 11, zip code: 266071 Patentee before: Haisense Air Conditioner Co., Ltd., Qingdao |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070404 |
|
| EXPY | Termination of patent right or utility model |