CN110530084B - Control method and device of electronic expansion valve - Google Patents
Control method and device of electronic expansion valve Download PDFInfo
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- CN110530084B CN110530084B CN201910869202.2A CN201910869202A CN110530084B CN 110530084 B CN110530084 B CN 110530084B CN 201910869202 A CN201910869202 A CN 201910869202A CN 110530084 B CN110530084 B CN 110530084B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a device of an electronic expansion valve, wherein the control method comprises the following steps: powering on the first controller; acquiring an alternating current signal of the first controller; the first controller converts the alternating current signal into a direct current signal according to the alternating current signal and inputs the direct current signal to the second controller; the second controller is started according to the direct current signal; the second controller controls the opening of the electronic expansion valve according to the set valve step. The invention converts alternating current signals into direct current signals through the cooperation of the first controller and the second controller which are externally arranged, provides stable electric signals for the opening work of the electronic expansion valve, and outputs the valve step control instruction to control the opening of the electronic expansion valve, thereby controlling the opening of the electronic expansion valve in the equipment (such as an air conditioner) on the premise of not starting the whole equipment with the electronic expansion valve.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a control method and a control device of an electronic expansion valve.
Background
The expansion valve is an important part in a refrigeration system, such as an air conditioner, and is generally installed between a liquid storage cylinder and an evaporator, and changes the opening degree of the valve to control the flow rate of refrigerant according to the change of the load of the evaporator, so as to prevent the phenomenon of insufficient utilization of the area of the evaporator and cylinder knock. At present, for example, in the air conditioning field, the way of opening the expansion valve (e.g. electronic expansion valve) is usually by starting the outdoor unit of the air conditioner, and then the signal collector starts to operate, and transmits the collected pressure signal and temperature signal to the controller, and outputs the corresponding pulse voltage signal to the coil (driver) of the electronic expansion valve after processing, so as to drive the electronic expansion valve to open.
However, in the production process of the air conditioner, the liquid is often added into the liquid storage cylinder by vacuum pumping, but the outdoor unit of the air conditioner cannot be started at this time, the controller cannot collect a pressure or temperature signal, and cannot control the opening of the electronic expansion valve, and the electronic expansion valve is not in an open state, so that the vacuum pumping is slow, and the production efficiency of the air conditioner is affected.
Disclosure of Invention
In view of the above, the present invention is directed to a method and an apparatus for controlling an electronic expansion valve, which can open the electronic expansion valve without starting the whole apparatus of an apparatus (e.g., an air conditioner) having the electronic expansion valve.
To this end, an aspect of the present invention provides a control method of an electronic expansion valve, including: powering on the first controller; acquiring an alternating current signal of the first controller; the first controller converts the alternating current signal into a direct current signal according to the alternating current signal and inputs the direct current signal to the second controller; the second controller is started according to the direct current signal; the second controller controls the opening of the electronic expansion valve according to the set valve step.
In one aspect of the present invention, an ac signal is converted into a dc signal by the cooperation of the first and second external controllers, so as to provide a stable electrical signal for the opening operation of the electronic expansion valve, and a valve step control command is output to control the opening of the electronic expansion valve, thereby controlling the opening of the electronic expansion valve in the device without starting the whole device (e.g., air conditioner) having the electronic expansion valve, so as to increase the rate of vacuum pumping through the electronic expansion valve, and thus improve the production efficiency of the device (e.g., air conditioner) having the electronic expansion valve.
In the control method of the electronic expansion valve according to the present invention, the second controller may control the electronic expansion valve to be opened according to the set valve step, including: acquiring the set valve step; the second controller outputs a pulse signal according to the set valve step and inputs the pulse signal to an electromagnetic coil of the electronic expansion valve; and the electromagnetic coil opens the electronic expansion valve according to the pulse signal. Therefore, the second controller can control the opening of the electronic expansion valve by outputting the pulse signal under the condition of setting the valve step without being influenced by the temperature and the air pressure in the environment, and the convenience of controlling the electronic expansion valve is improved.
In the control method of the electronic expansion valve according to the present invention, the second controller may output a pulse signal according to the set valve step and input the pulse signal to a solenoid of the electronic expansion valve, and the solenoid may further include: the second controller performs judgment of the set valve step: when the set valve step is zero, the second controller outputs a first pulse signal and inputs the first pulse signal to the electromagnetic coil of the electronic expansion valve; when the set valve step is not equal to zero, the second controller outputs a second pulse signal and inputs the second pulse signal to the electromagnetic coil of the electronic expansion valve. Therefore, the electronic expansion valve can be adjusted to reach different opening degrees according to different values of the set valve steps, so that different opening degree requirements are met.
In the control method of the electronic expansion valve according to the present invention, the first pulse signal may be a pulse signal value corresponding to a maximum opening degree of the electronic expansion valve. In this case, even when the valve step is set to zero, the electronic expansion valve can be ensured to be able to reach the maximum opening degree, which is advantageous for improving the rate of evacuation of the equipment (for example, an air conditioner) having the electronic expansion valve, and further improving the plant production efficiency of the equipment.
In the control method of an electronic expansion valve according to the present invention, the second pulse signal may be proportional to the set valve step. In this case, the magnitude of the pulse signal can be outputted according to the magnitude of the set valve step, so as to make the electronic expansion valve reach the corresponding opening degree.
In the control method of the electronic expansion valve according to the present invention, the electromagnetic coil may open the electronic expansion valve according to the pulse signal, so that the electromagnetic coil opens the electronic expansion valve at a set speed according to the pulse signal. Therefore, the opening speed of the electronic expansion valve can be controlled through the set speed, so that the electronic expansion valve can be fully, safely and effectively opened.
In the control method of the electronic expansion valve according to the present invention, the set speed is v, where v is 28ms/pls ≦ 35 ms/pls. Preferably, the set speed v is 32 ms/pls. Generally, when the set speed is too low, the time required for opening the electronic expansion valve is long, which affects the production efficiency; when the set speed is too high, the force for opening the electronic expansion valve is large, and the electronic expansion valve is easily damaged. Therefore, the set speed is controlled within a certain range or a certain numerical value, so that the production efficiency is ensured, the electronic expansion valve is prevented from being excessively damaged, and the service life of the electronic expansion valve is prolonged.
In the control method of the electronic expansion valve according to the present invention, the alternating-current signal may be an alternating-current voltage, and the direct-current signal may be a direct-current voltage. Thus, the connection between the first controller and the second controller and the like can be formed more directly.
In addition, in the control method of the electronic expansion valve according to the present invention, optionally, the converting the ac electric signal into the dc electric signal according to the ac electric signal and inputting the dc electric signal to the second controller by the first controller includes: and judging the alternating voltage, and outputting the alternating voltage as direct voltage when the alternating voltage meets a first set condition. Therefore, through the setting of the first setting condition, the alternating-current voltage can be converted into the direct-current voltage under the condition that the alternating-current voltage meets a certain condition, and the stability of the converted direct-current voltage is improved.
In the control method of the electronic expansion valve according to the present invention, the first setting condition may be the ac voltage U1Satisfies that U is less than or equal to 110V1Less than or equal to 250V. Preferably, the first setting condition is the alternating voltage U1Satisfies the condition that U is more than or equal to 220V1Less than or equal to 250V. Under the condition, the alternating voltage provided for the controller can be the common domestic voltage, and the use convenience and effectiveness of the control device are improved.
In addition, in the control method of an electronic expansion valve according to the present invention, the activating of the second controller according to the dc electric signal may include: and judging the direct current voltage, and starting the second controller when the direct current voltage meets a second set condition. Therefore, the second controller can be started only when the direct-current voltage meets a certain condition through the setting of the second setting condition, so that the working stability of the controller is improved, and the second controller is prevented from being damaged due to overlarge voltage or overlow voltage.
Further, the present invention relates toIn the control method of the electronic expansion valve, optionally, the second set condition is the dc voltage U2Satisfies that U is more than or equal to 10V2Less than or equal to 15V. Preferably, the second setting condition is the dc voltage U212V. Therefore, stable rated voltage can be provided for the electronic expansion valve, so that the electronic expansion valve is prevented from being burnt out due to overhigh voltage or incapable of normally working due to overlow voltage, and the stability of the opening process of the electronic expansion valve is ensured.
Another aspect of the present invention provides a control apparatus for an electronic expansion valve, comprising: the electronic expansion valve comprises a first controller and a second controller, wherein the first controller is connected with the second controller, and the second controller is in communication connection with the electronic expansion valve; the first controller is used for acquiring an alternating current signal of the first controller, converting the alternating current signal into a direct current signal according to the alternating current signal and inputting the direct current signal into the second controller; the second controller is used for controlling the second controller to be started according to the direct current signal and is also used for controlling the electronic expansion valve to be opened according to the set valve step. Therefore, the external controller component of the electronic expansion valve can be formed, so that the opening of the electronic expansion valve in the equipment can be controlled on the premise of not starting the whole equipment (such as an air conditioner) with the electronic expansion valve, the vacuumizing speed of the electronic expansion valve is increased, and the production efficiency of the equipment (such as the air conditioner) with the electronic expansion valve is improved.
According to the invention, the control method and the control device of the electronic expansion valve can be used for controlling the electronic expansion valve to open under the condition that the whole device of the equipment (such as an air conditioner) with the electronic expansion valve is not started, so that the convenience for controlling the opening of the electronic expansion valve is improved, the vacuumizing speed of the equipment through the electronic expansion valve is improved, and the production efficiency of the equipment (such as the air conditioner) with the electronic expansion valve is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a control method of an electronic expansion valve according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a control method of an electronic expansion valve according to an embodiment of the present invention, in which a first controller converts an ac electric signal into a dc electric signal according to the ac electric signal and inputs the dc electric signal to a second controller;
fig. 3 is a schematic flow chart of a control method of an electronic expansion valve according to an embodiment of the present invention, in which a second controller is activated according to a direct current signal;
fig. 4 is a schematic flow chart showing a process in which the second controller controls the opening of the electronic expansion valve in accordance with the set valve step in the control method of the electronic expansion valve according to the embodiment of the invention;
fig. 5 is a schematic flow chart showing a control method of an electronic expansion valve according to an embodiment of the present invention in which a second controller outputs a pulse signal according to a set valve step and inputs the pulse signal to a solenoid of the electronic expansion valve;
fig. 6 is a schematic view showing an operation principle of a control device of an electronic expansion valve according to an embodiment of the present invention.
Description of reference numerals:
11-first controller, 12-second controller, 13-solenoid.
Detailed Description
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Fig. 6 is a schematic view showing an operation principle of a control device of an electronic expansion valve according to an embodiment of the present invention.
In this embodiment, the control device of the electronic expansion valve may include: a first controller 11 and a second controller 12, wherein the first controller 11 and the second controller are connected, and the second controller 12 is connected to the electronic expansion valve in a communication manner; the first controller 11 is configured to obtain an alternating current signal of the first controller, convert the alternating current signal into a direct current signal according to the alternating current signal, and input the direct current signal to the second controller 12; the second controller 12 is configured to control the second controller 12 to start according to the dc signal, and further configured to control the opening of the electronic expansion valve according to a set valve step. Here, the second controller 12 is connected to a solenoid 13 of the electronic expansion valve.
Therefore, the external controller component of the electronic expansion valve can be formed, so that the opening of the electronic expansion valve in the equipment can be controlled on the premise of not starting the whole equipment (such as an air conditioner) with the electronic expansion valve, the vacuumizing speed of the electronic expansion valve is increased, and the production efficiency of the equipment (such as the air conditioner) with the electronic expansion valve is improved.
Fig. 1 is a schematic flowchart of a control method of an electronic expansion valve according to an embodiment of the present invention.
Referring to fig. 1, in the present embodiment, a control method of an electronic expansion valve may include: step S100: the first controller 11 is powered up; step S200: acquiring an alternating current signal of the first controller 11; step S300: the first controller 11 converts the alternating current signal into a direct current signal according to the alternating current signal and inputs the direct current signal to the second controller 12; step S400: the second controller 12 is started according to the direct current signal; step S500: the second controller 12 controls the opening of the electronic expansion valve according to the set valve step.
Therefore, in the present embodiment, the external first controller 11 and the second controller 12 cooperate to convert the ac signal into the dc signal, so as to provide a stable electrical signal for the opening operation of the electronic expansion valve, and output the valve step control command to control the opening of the electronic expansion valve, thereby controlling the opening of the electronic expansion valve in the device (e.g. air conditioner) without starting the whole device of the device having the electronic expansion valve, so as to increase the rate of vacuum pumping through the electronic expansion valve, and improve the production efficiency of the device having the electronic expansion valve (e.g. air conditioner).
In the present embodiment, in step S100: the first controller 11 is powered up, i.e. the first controller 11 is provided with an electrical signal. In some examples, the first controller 11 may be powered by an external power source, i.e., the first controller 11 may be provided with an electrical signal by an external power source, such as being plugged into a powered socket. In other examples, the first controller 11 may be supplied with an ac signal by a battery or the like. Thereby, the first controller 11 can be activated.
In the present embodiment, in step S200: the ac electric signal of the first controller 11 is obtained, and the form of the ac electric signal is not particularly limited. In some examples, the alternating current signal may be an alternating voltage. In other examples, the alternating current signal may be alternating current or the like. Therefore, different alternating current signal forms can be set according to different practical application scenes, and different application requirements are met.
In the present embodiment, in step S300: the first controller 11 converts the ac electrical signal into a dc electrical signal according to the ac electrical signal, and inputs the dc electrical signal to the second controller 12, and the form of the dc electrical signal is not particularly limited. In some examples, the dc electrical signal may be a dc voltage. In other examples, the dc signal may be dc current or the like. Therefore, different direct current signal forms can be set according to different practical application scenes, and different application requirements are met.
Fig. 2 is a schematic flow chart showing a control method of an electronic expansion valve according to an embodiment of the present invention in which a first controller 11 converts an ac electric signal into a dc electric signal based on the ac electric signal and inputs the dc electric signal to a second controller 12.
In this embodiment, referring to fig. 2, step S300 may include: step S310: judging the alternating voltage, and step S320: and when the alternating voltage meets a first set condition, outputting the alternating voltage as direct voltage. In some examples, in step S320, the first setting condition may be an alternating voltage U1Satisfies that U is less than or equal to 110V1Less than or equal to 250V. In other examples, the first setting condition may be the ac voltage U1Satisfies the condition that U is more than or equal to 200V1Less than or equal to 250V. In this case, the ac voltage supplied to the controller may be a common domestic voltage, for example, a voltage for domestic use of 110V in the united states or a voltage for domestic use of 220V, and thus, the convenience and effectiveness of use of the control device may be improved.
In addition, in the present embodiment, in step S300, after step S310, the method may further include: step S330: and when the alternating voltage does not meet the first set condition, terminating the program. Thus, damage to the controller due to excessively low or high voltage can be prevented.
In the present embodiment, in step S400: the second controller 12 is activated in response to a dc electrical signal. As described above, in some examples, the dc electrical signal may be a dc voltage. In other examples, the dc signal may be dc current or the like. Therefore, different direct current signal forms can be set according to different practical application scenes, so that different application requirements are met, and the second controller 12 can be started.
Fig. 3 is a schematic flow chart showing the activation of the second controller 12 by the dc electric signal in the control method of the electronic expansion valve according to the embodiment of the present invention.
In this embodiment, referring to fig. 3, step S400 may include: step S410: determining the dc voltage, step S420: when the dc voltage satisfies a second set condition, the second controller 1216 is activated. In step S420, the second setting condition is not particularly limited, and in some examples, the second setting condition may be the dc voltage U2Satisfies that U is more than or equal to 10V2Less than or equal to 15V. In other examples, the second setting condition may be the dc voltage U212V. Therefore, stable rated voltage can be provided for the electronic expansion valve, so that the electronic expansion valve is prevented from being burnt out due to overhigh voltage or incapable of normally working due to overlow voltage, and the stability of the opening process of the electronic expansion valve is ensured.
In addition, in the present embodiment, in step S400, after step S410, the method may further include: step S430: and when the direct current voltage does not meet the second set condition, terminating the program. Thus, damage to the controller due to excessively low or high voltage can be prevented.
In the present embodiment, in step S500: the second controller 12 controls the electronic expansion valve to be opened according to the set valve step. Therefore, the electronic expansion valve can be controlled to be opened so as to carry out the steps of vacuumizing the equipment and the like.
Fig. 4 is a schematic flow chart showing a process in which the second controller 12 controls the opening of the electronic expansion valve in accordance with the set valve step in the control method of the electronic expansion valve according to the embodiment of the present invention.
In this embodiment, referring to fig. 4, step S500 may include: step S510: acquiring a set valve step, and step S520: the second controller 12 outputs a pulse signal according to the set valve step and inputs the pulse signal to the solenoid of the electronic expansion valve, and step S530: the electromagnetic coil opens the electronic expansion valve according to the pulse signal. Therefore, the electronic expansion valve can be adjusted to reach different opening degrees according to different values of the set valve steps, so that different opening degree requirements are met.
In some examples, in step S510, the setting of the valve step may be set manually or may be default by the device. Therefore, different application requirements can be met under different application scenes.
In this embodiment, in step S530, the solenoid opening the electronic expansion valve according to the pulse signal may be such that the solenoid opens the electronic expansion valve at a set speed according to the pulse signal. The value of the set speed is not particularly limited. In some examples, the set speed is v, where 28ms/pls ≦ v ≦ 35ms/pls, for example, the set speed v may be 30ms/pls, 32ms/pls, or 33 ms/pls. Generally, when the set speed is too low, the time required for opening the electronic expansion valve is long, which affects the production efficiency; when the set speed is too high, the force for opening the electronic expansion valve is large, and the electronic expansion valve is easily damaged. Therefore, the set speed is controlled within a certain range or a certain numerical value, so that the production efficiency is ensured, the electronic expansion valve is prevented from being excessively damaged, and the service life of the electronic expansion valve is prolonged.
Fig. 5 is a schematic flow chart showing a control method of the electronic expansion valve according to the embodiment of the present invention in which the second controller 12 outputs a pulse signal according to a set valve step and inputs the pulse signal to the solenoid of the electronic expansion valve.
In this embodiment, referring to fig. 5, step S520 may include: step S521: the second controller 12 makes a judgment of the set valve step), step S522: when the valve step is set to zero, the second controller 12 outputs the first pulse signal and inputs the first pulse signal to the solenoid of the electronic expansion valve, and step S523: when the set valve step is not equal to zero, the second controller 12 outputs a second pulse signal and inputs the second pulse signal to the solenoid of the electronic expansion valve. Therefore, the electronic expansion valve can be adjusted to reach different opening degrees according to different values of the set valve steps, so that different opening degree requirements are met.
In the present embodiment, the magnitude of the first pulse signal is not particularly limited. In some examples, the first pulse signal may be a pulse signal value corresponding to when the electronic expansion valve is maximized in opening degree. For example, the valve step when the opening of the electronic expansion valve is maximum may be 480 steps, and the first pulse signal may be 540. In this case, even when the valve step is set to zero, the electronic expansion valve can be ensured to be able to reach the maximum opening degree, which is advantageous for improving the rate of evacuation of the equipment (for example, an air conditioner) having the electronic expansion valve, and further improving the plant production efficiency of the equipment.
In the present embodiment, the magnitude of the second pulse signal is not particularly limited. In some examples, the second pulse signal may be in a proportional relationship with the set valve step. For example, the second pulse signal may be X, and the set valve step may be a, where a is an integer greater than 0 and equal to or less than 480, and the direct proportional relationship may be X540 × a/480, where 480 may be a valve step corresponding to the maximum opening degree of the electronic expansion valve, and 540 may be a maximum value corresponding to the second pulse signal. In other examples, for example, when the value of the valve step a is set to 160 or 240, the corresponding value of the second pulse signal X may be 180 or 270, so that the electronic expansion valve is at an opening degree of one or one-half of three molecules. In this case, the electronic expansion valve can reach the corresponding opening degree according to the magnitude of the set valve step and the magnitude of the corresponding output pulse signal, so that the flow of the equipment (such as an air conditioner) applying the electronic expansion valve can be adjusted in different opening degree states, and the performance test of the equipment, such as a refrigeration performance test, can be favorably carried out.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention will be apparent to those skilled in the art from this description.
Claims (6)
1. A control method of an electronic expansion valve, comprising:
the first controller (11) is powered on;
acquiring an alternating current signal of the first controller (11);
the first controller (11) converts the alternating current signal into a direct current signal according to the alternating current signal and inputs the direct current signal into a second controller (12);
the second controller (12) is started according to the direct current signal;
the second controller (12) controls the opening of the electronic expansion valve according to the set valve step;
the second controller (12) controls the electronic expansion valve to be opened according to the set valve step includes:
acquiring the set valve step;
the second controller (12) outputs a pulse signal according to the set valve step and inputs the pulse signal to an electromagnetic coil of the electronic expansion valve;
the electromagnetic coil opens the electronic expansion valve according to the pulse signal;
the alternating current signal is alternating current voltage, and the direct current signal is direct current voltage;
the first controller (11) converts the alternating current signal into a direct current signal according to the alternating current signal and inputs the direct current signal to the second controller (12) comprises:
judging the alternating voltage when the alternating voltage meets the requirementOutputting the alternating voltage as direct voltage under a first set condition; the first setting condition is the AC voltage U1Satisfies that U is less than or equal to 110V1≤250V；
The second controller (12) being activated in response to the DC electrical signal comprises:
judging the direct current voltage, and starting the second controller (12) when the direct current voltage meets a second set condition; the second setting condition is the DC voltage U2Satisfies that U is more than or equal to 10V2≤15V。
2. The control method of the electronic expansion valve according to claim 1, wherein the second controller (12) outputting a pulse signal according to the set valve step and inputting the pulse signal to the solenoid coil of the electronic expansion valve comprises:
the second controller (12) performs judgment of the set valve step: when the set valve step is zero, the second controller (12) outputs a first pulse signal and inputs the first pulse signal to the electromagnetic coil of the electronic expansion valve; when the set valve step is not equal to zero, the second controller (12) outputs a second pulse signal and inputs the second pulse signal to the electromagnetic coil of the electronic expansion valve.
3. The control method of an electronic expansion valve according to claim 2, wherein the second pulse signal is in a direct proportional relationship with the set valve step.
4. The method of controlling an electronic expansion valve according to claim 1, wherein the solenoid opening the electronic expansion valve according to the pulse signal is the solenoid opening the electronic expansion valve at a set speed according to the pulse signal.
5. The control method of an electronic expansion valve according to claim 4, characterized in that the set speed is v, where 28ms/pls ≦ v ≦ 35 ms/pls.
6. A control device for an electronic expansion valve, comprising: a first controller (11) and a second controller (12), wherein the first controller (11) and the second controller are connected, and the second controller (12) is connected with the electronic expansion valve in a communication way; the first controller (11) is used for acquiring an alternating current signal of the first controller, converting the alternating current signal into a direct current signal according to the alternating current signal and inputting the direct current signal into a second controller (12); the second controller (12) is started according to the direct current signal and is also used for controlling the opening of the electronic expansion valve according to a set valve step; the second controller (12) is used for acquiring the set valve step, outputting a pulse signal according to the set valve step and inputting the pulse signal to an electromagnetic coil of the electronic expansion valve; the electromagnetic coil is used for opening the electronic expansion valve according to the pulse signal; the alternating current signal is alternating current voltage, and the direct current signal is direct current voltage; the first controller (11) is further configured to determine the alternating-current voltage, and output the alternating-current voltage as a direct-current voltage when the alternating-current voltage meets a first set condition; the first setting condition is the AC voltage U1Satisfies that U is less than or equal to 110V1Less than or equal to 250V; the second controller (12) is further configured to determine the dc voltage, and when the dc voltage meets a second set condition, the second controller (12) is started; the second setting condition is the DC voltage U2Satisfies that U is more than or equal to 10V2≤15V。
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| JP2007017075A (en) * | 2005-07-07 | 2007-01-25 | Mitsubishi Heavy Ind Ltd | Refrigeration unit and operation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1923646A4 (en) * | 2005-09-09 | 2016-11-16 | Daikin Ind Ltd | Refrigeration device |
| CN104515333A (en) * | 2013-09-28 | 2015-04-15 | 杭州三花研究院有限公司 | Circulating system of refrigerant |
| CN104792078A (en) * | 2015-04-29 | 2015-07-22 | 四川长虹空调有限公司 | Device and method for driving electronic expansion valve with multiple communication modes |
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