CN112361562A - Electric cabinet cooling device, cooling control method and air conditioning unit - Google Patents
Electric cabinet cooling device, cooling control method and air conditioning unit Download PDFInfo
- Publication number
- CN112361562A CN112361562A CN202011345396.5A CN202011345396A CN112361562A CN 112361562 A CN112361562 A CN 112361562A CN 202011345396 A CN202011345396 A CN 202011345396A CN 112361562 A CN112361562 A CN 112361562A
- Authority
- CN
- China
- Prior art keywords
- air
- electric cabinet
- controlling
- bypass
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000004378 air conditioning Methods 0.000 title claims abstract description 27
- 230000008859 change Effects 0.000 claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims abstract description 16
- 238000004590 computer program Methods 0.000 claims description 3
- 239000004576 sand Substances 0.000 abstract description 11
- 239000000428 dust Substances 0.000 abstract description 10
- 238000001514 detection method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20209—Thermal management, e.g. fan control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Human Computer Interaction (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Fluid Mechanics (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention discloses an electric cabinet cooling device, a cooling control method and an air conditioning unit. Wherein, the device includes: the bypass air pipe penetrates through the inner space of the electric cabinet, an air inlet of the bypass air pipe is communicated with an air supply air pipe of the air conditioning unit, an air outlet of the bypass air pipe is communicated with the outer space of the electric cabinet, and cold air introduced by the air inlet cools the electric cabinet and then is discharged from the air outlet; the air valve is arranged in the bypass ventilation pipe, and the opening degree of the air valve is used for controlling the air inlet amount of the bypass air pipe; and the controller is connected with the air valve and used for controlling the opening and closing of the air valve according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet and controlling the opening of the air valve according to the change rate of the internal temperature of the electric cabinet after the air valve is opened. According to the invention, the temperature inside the electric cabinet can be reduced, and meanwhile, sand and dust are prevented from entering the electric controller.
Description
Technical Field
The invention relates to the technical field of units, in particular to an electric cabinet cooling device, a cooling control method and an air conditioning unit.
Background
Along with the development of electrical intellectualization, the future functions of an air conditioning unit (such as an air cooling unit) are more complex and diversified, more and more electrical components are integrated, the components are compactly arranged in an electric cabinet, the continuously accumulated heat effect causes continuous high temperature, and if the temperature is not reduced, the functional damage to core sensitive and precise components is caused. In the prior art, the hole structure is arranged on the electric cabinet shell to perform ventilation and cooling, but under the environment with large wind and sand, the requirement on the IP protection level of the electric cabinet is extremely high, and if the hole position of the electric cabinet exceeds 1mm, sand and dust can enter the electric cabinet, so that the performance of internal electrical components is influenced. Therefore, the cooling mode of opening holes on the shell is not suitable for the environment with large sand wind.
The problem that sand and dust enters the electric controller due to the fact that the electric controller is cooled through a hole opening mode in the prior art is solved, and an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an electric cabinet cooling device, a cooling control method and an air conditioning unit, and aims to solve the problem that sand and dust can enter an electric controller when the electric controller is cooled in a hole opening mode in the prior art.
In order to solve the technical problem, the invention provides an electric cabinet cooling device, which is applied to an air conditioning unit and comprises:
the bypass air pipe penetrates through the inner space of the electric cabinet, an air inlet of the bypass air pipe is communicated with an air supply air pipe of the air conditioning unit, an air outlet of the bypass air pipe is communicated with the outer space of the electric cabinet, and cold air introduced by the air inlet cools the electric cabinet and then is discharged from the air outlet;
the air valve is arranged in the bypass ventilation pipe, and the opening degree of the air valve is used for controlling the air inlet amount of the bypass air pipe;
and the controller is connected with the air valve and used for controlling the opening and closing of the air valve according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet and controlling the opening of the air valve according to the change rate of the internal temperature of the electric cabinet after the air valve is opened.
Further, the apparatus further comprises:
the first temperature sensor is arranged at the air inlet of the bypass air pipe, is connected with the controller and is used for detecting the air inlet temperature of the bypass air pipe and transmitting the air inlet temperature to the controller;
and the second temperature sensor is arranged in the electric cabinet, is connected with the controller and is used for detecting the internal temperature of the electric cabinet and transmitting the internal temperature to the controller.
Further, the bypass air pipe penetrates through the upper part of the inner space of the electric cabinet.
Further, the apparatus further comprises:
and the dustproof cover is arranged at the air outlet of the bypass air pipe, is opened when the air valve is opened and is closed when the air valve is closed.
Further, the air outlet of the bypass air pipe is communicated with a return air pipe of the air conditioning unit.
Further, the apparatus further comprises:
and the fan is arranged in the side ventilation pipe and connected with the controller.
The invention also provides an air conditioning unit which comprises the electric cabinet cooling device.
The invention also provides an electric cabinet cooling control method, which is applied to the electric cabinet cooling device and comprises the following steps:
acquiring the air inlet temperature of a bypass air pipe and the internal temperature of an electric cabinet;
controlling the opening and closing of an air valve in the bypass air pipe according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet;
and after the air valve is controlled to be opened, controlling the opening degree of the air valve according to the change rate of the internal temperature of the electric cabinet.
Further, according to the air inlet temperature of bypass tuber pipe with the switching of the blast gate in the inside temperature control bypass ventilation pipe of electric cabinet, include:
judging whether the internal temperature of the electric cabinet is higher than the air inlet temperature of the bypass air pipe or not;
if yes, controlling the air valve to be opened;
and if not, controlling the air valve to close.
Further, the controlling the opening degree of the air valve according to the change rate of the internal temperature of the electric cabinet comprises the following steps:
controlling the opening degree of the air valve to be reduced if the change rate is larger than a first threshold value;
if the change rate is smaller than or equal to the first threshold value and larger than or equal to a second threshold value, controlling the opening degree of the air valve to be unchanged;
and if the change rate is smaller than the second threshold value, controlling the opening degree of the air valve to be increased.
Further, while controlling the air valve to be opened, the method further comprises:
and controlling the fan in the side ventilation pipe to start.
Further, after controlling the opening degree of the air valve to be reduced, the method further comprises:
after a first preset time, judging whether the change rate is still larger than the first threshold value;
if so, controlling the rotating speed of the fan to be reduced;
and if not, controlling the rotating speed of the fan to be unchanged.
Further, after controlling the opening degree of the air valve to increase, the method further comprises:
after a second preset time, judging whether the change rate is still smaller than the second threshold value;
if so, controlling the rotation speed of the fan to increase;
and if not, controlling the rotating speed of the fan to be unchanged.
The invention also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the above-mentioned electric cabinet cooling control method.
By applying the technical scheme of the invention, the electric cabinet is internally provided with the bypass air pipe, the air inlet of the bypass air pipe is communicated with the air supply air pipe of the air conditioning unit, the air outlet is communicated with the external space of the electric cabinet, cold air sent indoors is guided into the electric cabinet through the bypass air pipe for heat exchange, the temperature of elements in the electric cabinet is reduced, and dust and sand can be prevented from entering the electric controller while the temperature in the electric cabinet is reduced.
Drawings
FIG. 1 is a block diagram of an electric cabinet cooling device according to an embodiment of the present invention;
FIG. 2 is a block diagram of an electric cabinet cooling device according to another embodiment of the present invention;
FIG. 3 is a block diagram of an electric cabinet cooling device according to another embodiment of the present invention;
FIG. 4 is a flowchart of a temperature reduction control method for an electric cabinet according to an embodiment of the present invention;
FIG. 5 is a block diagram of an execution device according to an embodiment of the present invention;
fig. 6 is a flowchart of an electric cabinet cooling control method according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the thresholds in embodiments of the present invention, the thresholds should not be limited to these terms. These terms are only used to distinguish between different thresholds. For example, the first threshold may also be referred to as a second threshold, and similarly, the second threshold may also be referred to as a first threshold, without departing from the scope of embodiments of the present invention.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in the article or device in which the element is included.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The present embodiment provides an electric cabinet cooling device, which is applied to an air conditioning unit, and fig. 1 is a structural diagram of an electric cabinet cooling device according to an embodiment of the present invention, and as shown in fig. 1, the device includes:
bypass tuber pipe 1, bypass tuber pipe 1 pass the inner space of electric cabinet 2, and the air intake 11 intercommunication air conditioning unit's of bypass tuber pipe 1 air supply tuber pipe 3 for in introducing electric cabinet 2 with the low temperature air in the air supply tuber pipe 3, in order to realize cooling to electric cabinet 2, the outer space of electric cabinet 2 is fed through to bypass tuber pipe 1 air outlet 12, and the cold wind that air intake 11 introduced is cooled down the back to electric cabinet 2, discharges to the outer space from air outlet 12.
An air valve 4 is further arranged in the bypass air pipe 1, and the opening degree of the air valve 4 is used for controlling the air inlet volume of the bypass air pipe 1 so as to control the cooling speed.
The air valve 4 is connected with the controller 5, the controller 5 controls the opening and closing of the air valve 4 according to the air inlet temperature of the bypass air pipe 1 and the internal temperature of the electric cabinet, and after the air valve 4 is opened, the opening degree of the air valve 4 is controlled according to the change rate of the internal temperature of the electric cabinet. For example, when the temperature reduction speed is high, the opening degree of the air valve 4 is controlled to be reduced so as to reduce the air intake of the bypass air pipe 1 and enable more cold air to be used for indoor temperature reduction; when the cooling speed is slow, the opening of the air valve 4 is controlled to be increased so as to increase the air intake of the bypass air pipe 1 and improve the cooling speed of the electric cabinet.
The electric cabinet heat sink of this embodiment sets up the bypass tuber pipe in the electric cabinet, and the air intake intercommunication air conditioning unit's of bypass tuber pipe air supply tuber pipe, the exterior space of air outlet intercommunication electric cabinet will deliver to the leading-in electric cabinet of indoor cold wind inside through the bypass tuber pipe and carry out the heat transfer, reduces the temperature of electric cabinet internal component, can avoid inside the sand and dust entering electric controller when realizing the inside cooling of electric cabinet.
Example 2
In this embodiment, another temperature reducing device for an electric cabinet is provided, and fig. 2 is a structural diagram of a temperature reducing device for an electric cabinet according to another embodiment of the present invention, and as shown in fig. 2, a bypass air duct 1 passes through an upper space of an inner space of an electric cabinet according to a principle that hot air rises and cold air falls. The hot air in the electric cabinet rises to the periphery of the bypass air pipe 1, sinks after being cooled through heat exchange with the bypass air pipe 1, and new hot air rises to form air flow and accelerate cooling.
In order to detect the temperature of the air inlet 11 of the bypass air duct 1 and the internal temperature of the electric cabinet 2, as shown in fig. 2, the above-mentioned apparatus further includes:
the first temperature sensor 6 is arranged at an air inlet 11 of the bypass air pipe 1, and the first temperature sensor 5 is connected with the controller 5 and used for detecting the inlet air temperature of the bypass air pipe 1 and transmitting the inlet air temperature to the controller 5; and the second temperature sensor 7 is arranged in the electric cabinet 2, and the second temperature sensor 7 is connected with the controller 5 and used for detecting the internal temperature of the electric cabinet 2 and transmitting the internal temperature to the controller 5. The controller 5 controls the air valve 4 to be opened or closed according to the detection value of the first temperature sensor 6 and the detection value of the second temperature sensor 7 at the current moment, and controls the opening degree of the air valve 4 according to the detection value of the first temperature sensor 6 and the detection value of the second temperature sensor 7 at the current moment at intervals after the air valve 4 is opened so as to adjust the air intake of the bypass air pipe 1 and further adjust the cooling speed of the electric cabinet 2.
Because the 12 intercommunication exterior spaces of air outlet of bypass tuber pipe 1, when blast gate 4 was opened, constantly had cold wind to be discharged by bypass tuber pipe 1, consequently can not have sand and dust to get into bypass tuber pipe 1, but when blast gate 4 was closed, then probably have sand and dust to get into bypass tuber pipe 1, can cause bypass tuber pipe 1 to block up, influence next cooling, consequently, above-mentioned device still includes:
and the dustproof cover 8 is arranged at the air outlet of the bypass ventilation pipe 1, and the dustproof cover 9 is opened when the air valve is opened and closed when the air valve is closed so as to prevent sand and dust from entering the bypass ventilation pipe 1.
In order to control the air flow speed and direction in the bypass air duct 1, as shown in fig. 2, the apparatus further comprises: and the fan 9 is arranged in the side ventilation pipe 1, and the fan 9 is connected with the controller 5. The controller 5 is also used for controlling the rotating speed of the fan 9 according to the detection value of the first temperature sensor 6 and the detection value of the second temperature sensor 7.
Fig. 3 is a structural diagram of an electric cabinet cooling device according to another embodiment of the present invention, in other embodiments of the present invention, since the cold air of the bypass air duct 1 comes from the air supply air duct 3, that is, from the air conditioning unit, after heat exchange, the air after heat exchange may also be sent to the air conditioning system again, and therefore, as shown in fig. 2, the air outlet 12 of the bypass air duct 1 may also be communicated with the return air duct 10 of the air conditioning unit, for sending the air after heat exchange to the air conditioning system again for cooling again.
Example 3
The present embodiment provides an electric cabinet cooling control method, which is applied to an electric cabinet cooling device in the foregoing embodiment, and fig. 4 is a flowchart of the electric cabinet cooling control method according to the embodiment of the present invention, as shown in fig. 4, the method includes:
s101, obtaining the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet.
When the temperature control device is specifically implemented, the air inlet temperature can be detected through the first temperature sensor arranged at the air inlet of the bypass air pipe, and the internal temperature of the electric cabinet is detected through the second temperature sensor arranged in the electric cabinet.
And S102, controlling the opening and closing of an air valve in the bypass air pipe according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet.
The temperature of the cold air passing through the bypass air pipe is lower than the temperature inside the electric cabinet, so that heat exchange can be carried out, and whether an air valve in the bypass air pipe is opened or not needs to be controlled according to the air inlet temperature of the bypass air pipe and the temperature inside the electric cabinet.
And S103, after the air valve is controlled to be opened, controlling the opening of the air valve according to the change rate of the internal temperature of the electric cabinet.
After the air valve in the control bypass ventilation pipe is opened, the cooling speed is controlled according to the actual cooling condition, and therefore the opening degree of the air valve is controlled according to the change rate of the internal temperature of the electric cabinet.
According to the electric cabinet cooling control method, the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet are obtained, the opening and closing of the air valve in the bypass air pipe are controlled according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet, after the air valve is controlled to be opened, the opening degree of the air valve is controlled according to the change rate of the internal temperature of the electric cabinet, and whether cooling is performed or not and the cooling speed can be controlled according to the internal temperature of the electric cabinet. The over-high temperature of the electric cabinet is avoided, and meanwhile, the influence of excessive cold air on the refrigerating effect of the unit is avoided.
Example 4
In this embodiment, another method for controlling temperature reduction of an electric cabinet is provided, in order to control whether to reduce the temperature according to the temperature inside the electric cabinet, the step S102 specifically includes:
judging whether the internal temperature of the electric cabinet is higher than the air inlet temperature of the bypass air pipe or not; if so, controlling the air valve to be opened, wherein the opening of the air valve is opened by a preset opening degree when the air valve is controlled to be opened, and after the air valve is controlled to be opened, the opening degree of the air valve is controlled according to the change rate of the temperature in the electric cabinet and is adjusted on the basis of the preset opening degree; and if not, controlling the air valve to close. When the electric cabinet temperature difference judging device is specifically implemented, whether the inner temperature of the electric cabinet is larger than the air inlet temperature of the bypass air pipe or not is judged, whether the difference value between the inner temperature of the electric cabinet and the air inlet temperature is larger than 0 or not is judged, and whether the ratio of the inner temperature of the electric cabinet to the air inlet temperature is larger than 1 or not is judged because the inner temperature of the electric cabinet and the air inlet temperature are positive values.
After the control blast gate is opened, need carry out step S103, according to actual cooling situation control cooling speed, specifically include: if the temperature change rate in the electric cabinet is greater than the first threshold value, the cooling speed is higher, and the cold air for cooling is introduced by the air-conditioning refrigeration system, so that when the cooling speed meets the requirement, the introduced cold air quantity can be reduced to reduce the influence on the refrigeration effect, and at the moment, the opening of the control air valve is reduced; if the temperature change rate in the electric cabinet is smaller than or equal to the first threshold and is larger than or equal to the second threshold, the temperature reduction speed is always indicated, the opening degree of the air valve is controlled to be unchanged, and the current temperature reduction speed is kept; and if the temperature change rate in the electric cabinet is smaller than the second threshold value, the temperature reduction speed is low, the introduced cold air quantity needs to be increased, and the opening degree of the air valve is controlled to be increased.
In order to control the wind direction and the wind speed in the side ventilation pipe, a fan is further arranged in the side ventilation pipe, so that the method further comprises the following steps of when the air valve is controlled to be opened: and controlling the fan in the side ventilation pipe to start. In order to control the introduced air quantity when the temperature reduction speed is high, after the opening degree of the air valve is controlled to be reduced, the method further comprises the following steps: after the first preset time, judging whether the change rate is still larger than a first threshold value; if so, the method of reducing the opening degree of the air valve is explained, and the introduced air volume is not effectively reduced, so that the rotating speed of the fan can be continuously controlled to be reduced to reduce the speed; if not, the cooling speed is reduced to a reasonable range, and the rotating speed of the fan is controlled to be unchanged.
Similarly, after controlling the opening degree of the air valve to increase in order to avoid the excessively slow cooling speed, the method further comprises: after the second preset time, judging whether the change rate is still smaller than a second threshold value; if so, indicating that the cooling speed is still slow, and controlling the rotating speed of the fan to increase so as to further improve the cooling speed; if not, the cooling speed is increased to a reasonable range, and the rotating speed of the fan is controlled to be unchanged.
Example 5
This embodiment provides another kind of electric cabinet cooling controlling means, is applied to the refrigerating unit, and this refrigerating unit itself is a single cold air supply unit, can only refrigerate and can not heat.
The structure of the electric cabinet cooling control device of this embodiment is as shown in fig. 2 mentioned above, an outlet is arranged in the air supply duct 3 of the refrigerating unit, the outlet is an air inlet 11 of the bypass air duct 1, the bypass air duct 1 passes through the inside of the electric cabinet 2, the electric cabinet 2 is of a fully-closed structure except for a hole for passing through the bypass air duct 1, and the bypass air duct 1 and the electric cabinet 2 are in reliable sealing connection.
The air inlet 11 department sets up first temperature sensor 6 for detect inlet air temperature T1, and electric cabinet 2 is inside to set up second temperature sensor 7 for detect the inside temperature T2 of electric cabinet, and two temperature sensor all can be thermistor.
The controller 5 internally comprises an operation module which is provided with a calculation unit, a judgment unit, a time unit and a storage unit and can realize the functions of logic operation, timing, judgment and data storage. After the temperature in the air port and the electric cabinet is collected and processed by analog quantity, a control signal of 0-10V or 4-20mA is sent to adjust the step number of the motor, and then the opening degree of the air valve is adjusted.
An automatic air valve actuating device (not shown) is installed at an air valve of the bypass air duct 1, fig. 5 is a structural diagram of the actuating device according to the embodiment of the invention, and as shown in fig. 5, the actuating device comprises:
the clamp comprises a clamp holder a, a position indicator b, a manual button c, a power line connector d and a shell e, wherein a circuit board (not shown in the figure) is connected inside the power line connector d, the circuit board is connected with a motor (not shown in the figure) inside the execution device, and the motor drives a fan valve to open a certain angle. The air volume can be adjusted and controlled after the execution device is matched with the air valve 4.
This embodiment also provides another method for controlling cooling of an electric cabinet, and fig. 6 is a flowchart of a method for controlling cooling of an electric cabinet according to another embodiment of the present invention, as shown in fig. 6, the method includes:
s1, detecting the temperature T1 of the inlet air and the temperature T2 inside the electric cabinet.
S2, judging whether T2/T1 is less than or equal to 1, if yes, executing step S3, and if no, executing step S4.
And S3, controlling the air valve to close.
Wherein controlling the damper to close comprises: and if the air valve is in the opening state currently, controlling the air valve to be switched to the closing state, and if the air valve is in the closing state currently, keeping the closing state continuously. Before the air valve is controlled to be closed, the dust cover of the air outlet is controlled to be opened, and after the preset time is long, the air valve is controlled to be closed.
And S4, controlling the air valve to be opened.
Wherein controlling the damper to close comprises: and if the air valve is in the closed state currently, controlling the air valve to be switched to the open state, and if the air valve is in the open state currently, keeping the open state continuously. Before the control blast gate is opened, the shield of control air outlet is opened earlier, after predetermineeing for a long time, controls the blast gate and opens again.
S5, after the air valve is controlled to be opened, detecting the change rate delta T of the internal temperature of the electric cabinet, if the change rate of the internal temperature of the electric cabinet is greater than a first threshold value, executing the step S6, and if the change rate is less than or equal to the first threshold value and greater than or equal to a second threshold value, executing the step S7; if the rate of change of the internal temperature of the electric cabinet is less than the second threshold, step S8 is performed.
And S6, controlling the opening degree of the air valve to be reduced.
And S7, controlling the opening degree of the air valve to be unchanged.
And S8, controlling the opening degree of the air valve to increase.
By the electric cabinet cooling control method of the embodiment, the cooling speed can be adjusted according to the cooling condition in the electric cabinet. The over-high temperature of the electric cabinet is avoided, and meanwhile, the influence of excessive cold air on the refrigerating effect of the unit is avoided.
Example 6
This embodiment provides an air conditioning unit, and this air conditioning unit includes above-mentioned electric cabinet heat sink for realize the cooling of electric cabinet, improve the stability of whole air conditioning unit operation.
Example 7
The present embodiment provides a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the electric cabinet cooling control method of the above-described embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (14)
1. The utility model provides an electric cabinet heat sink, its characterized in that, the device is applied to air conditioning unit, wherein includes:
the bypass air pipe penetrates through the inner space of the electric cabinet, an air inlet of the bypass air pipe is communicated with an air supply air pipe of the air conditioning unit, an air outlet of the bypass air pipe is communicated with the outer space of the electric cabinet, and cold air introduced by the air inlet cools the electric cabinet and then is discharged from the air outlet;
the air valve is arranged in the bypass ventilation pipe, and the opening degree of the air valve is used for controlling the air inlet amount of the bypass air pipe;
and the controller is connected with the air valve and used for controlling the opening and closing of the air valve according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet and controlling the opening of the air valve according to the change rate of the internal temperature of the electric cabinet after the air valve is opened.
2. The apparatus of claim 1, further comprising:
the first temperature sensor is arranged at the air inlet of the bypass air pipe, is connected with the controller and is used for detecting the air inlet temperature of the bypass air pipe and transmitting the air inlet temperature to the controller;
and the second temperature sensor is arranged in the electric cabinet, is connected with the controller and is used for detecting the internal temperature of the electric cabinet and transmitting the internal temperature to the controller.
3. The apparatus of claim 1, wherein the bypass duct passes through an upper portion of an inner space of the electric cabinet.
4. The apparatus of claim 1, further comprising:
and the dustproof cover is arranged at the air outlet of the bypass air pipe, is opened when the air valve is opened and is closed when the air valve is closed.
5. The device of claim 1, wherein the air outlet of the bypass air duct is communicated with a return air duct of the air conditioning unit.
6. The apparatus of claim 1, further comprising:
and the fan is arranged in the side ventilation pipe and connected with the controller.
7. An air conditioning unit, characterized in that, includes the electric cabinet temperature reducing device of any one of claims 1 to 6.
8. An electric cabinet cooling control method applied to the electric cabinet cooling device according to any one of claims 1 to 6, wherein the method comprises the following steps:
acquiring the air inlet temperature of a bypass air pipe and the internal temperature of an electric cabinet;
controlling the opening and closing of an air valve in the bypass air pipe according to the air inlet temperature of the bypass air pipe and the internal temperature of the electric cabinet;
and after the air valve is controlled to be opened, controlling the opening degree of the air valve according to the change rate of the internal temperature of the electric cabinet.
9. The method of claim 8, wherein controlling the opening and closing of the damper in the bypass air duct according to the temperature of the inlet air of the bypass air duct and the temperature inside the electric cabinet comprises:
judging whether the internal temperature of the electric cabinet is higher than the air inlet temperature of the bypass air pipe or not;
if yes, controlling the air valve to be opened;
and if not, controlling the air valve to close.
10. The method of claim 8, wherein controlling the opening of the damper according to the rate of change of the temperature inside the electric cabinet comprises:
controlling the opening degree of the air valve to be reduced if the change rate is larger than a first threshold value;
if the change rate is smaller than or equal to the first threshold value and larger than or equal to a second threshold value, controlling the opening degree of the air valve to be unchanged;
and if the change rate is smaller than the second threshold value, controlling the opening degree of the air valve to be increased.
11. The method of claim 10, wherein while controlling the damper to open, the method further comprises:
and controlling the fan in the side ventilation pipe to start.
12. The method of claim 11, wherein after controlling the opening of the damper to decrease, the method further comprises:
after a first preset time, judging whether the change rate is still larger than the first threshold value;
if so, controlling the rotating speed of the fan to be reduced;
and if not, controlling the rotating speed of the fan to be unchanged.
13. The method of claim 11, wherein after controlling the opening of the damper to increase, the method further comprises:
after a second preset time, judging whether the change rate is still smaller than the second threshold value;
if so, controlling the rotation speed of the fan to increase;
and if not, controlling the rotating speed of the fan to be unchanged.
14. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 8 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345396.5A CN112361562A (en) | 2020-11-25 | 2020-11-25 | Electric cabinet cooling device, cooling control method and air conditioning unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011345396.5A CN112361562A (en) | 2020-11-25 | 2020-11-25 | Electric cabinet cooling device, cooling control method and air conditioning unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112361562A true CN112361562A (en) | 2021-02-12 |
Family
ID=74533427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011345396.5A Pending CN112361562A (en) | 2020-11-25 | 2020-11-25 | Electric cabinet cooling device, cooling control method and air conditioning unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112361562A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3959576A (en) * | 1974-03-01 | 1976-05-25 | Siemens Aktiengesellschaft | Apparatus for supplying power to electrical devices having conductors cooled to a low temperature |
| CN104422040A (en) * | 2013-09-06 | 2015-03-18 | 广东美的制冷设备有限公司 | Air conditioner outdoor unit, variable frequency air conditioner comprising same and control method of variable frequency air conditioner |
| CN104990159A (en) * | 2015-06-11 | 2015-10-21 | 广东美的暖通设备有限公司 | Motor heat dissipation structure, air conditioner and motor heat dissipation method |
| CN107940609A (en) * | 2017-11-06 | 2018-04-20 | 珠海格力电器股份有限公司 | A kind of radiating subassembly, air-conditioning system and the control method of air conditioner electric control case |
| CN110285549A (en) * | 2019-07-03 | 2019-09-27 | 珠海格力电器股份有限公司 | Air-conditioning and its region control method |
| CN213873094U (en) * | 2020-11-25 | 2021-08-03 | 珠海格力电器股份有限公司 | Electric cabinet cooling device and air conditioning unit |
-
2020
- 2020-11-25 CN CN202011345396.5A patent/CN112361562A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3959576A (en) * | 1974-03-01 | 1976-05-25 | Siemens Aktiengesellschaft | Apparatus for supplying power to electrical devices having conductors cooled to a low temperature |
| CN104422040A (en) * | 2013-09-06 | 2015-03-18 | 广东美的制冷设备有限公司 | Air conditioner outdoor unit, variable frequency air conditioner comprising same and control method of variable frequency air conditioner |
| CN104990159A (en) * | 2015-06-11 | 2015-10-21 | 广东美的暖通设备有限公司 | Motor heat dissipation structure, air conditioner and motor heat dissipation method |
| CN107940609A (en) * | 2017-11-06 | 2018-04-20 | 珠海格力电器股份有限公司 | A kind of radiating subassembly, air-conditioning system and the control method of air conditioner electric control case |
| CN110285549A (en) * | 2019-07-03 | 2019-09-27 | 珠海格力电器股份有限公司 | Air-conditioning and its region control method |
| CN213873094U (en) * | 2020-11-25 | 2021-08-03 | 珠海格力电器股份有限公司 | Electric cabinet cooling device and air conditioning unit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3348917B1 (en) | Air volume regulation method | |
| US20120291984A1 (en) | Kind Of Air Conditioner System And Control Method Of Its Condensing Fan | |
| CN104676837B (en) | Energy-saving and frequency-variable method applied to the whole temperature difference control of freezing water system of central air conditioner | |
| US9982587B2 (en) | Cooling system for engine | |
| CN103095098B (en) | Frequency converter heat-dissipation cooling system and controlling method and device thereof | |
| CN111426021A (en) | Air duct type air conditioner and operation control method and device thereof | |
| US20230288087A1 (en) | Avoiding Coil Freeze in HVAC Systems | |
| CN110677014B (en) | Cooling system and method of frequency converter capable of uniformly cooling frequency converter and air conditioning equipment | |
| JP2003249786A (en) | Dewing preventing structure of electronic equipment and dewing preventing method | |
| CN113028590B (en) | Air conditioner low-temperature refrigeration control method and device and air conditioner | |
| CN203837400U (en) | Temperature control device for refrigerating chamber | |
| JP2006038379A (en) | Cold and hot water control method of cold and hot heat source machine | |
| CN110579010A (en) | Control method and control device for electronic expansion valve of multi-split internal machine and air conditioner | |
| CN110307597A (en) | A kind of air conditioner indoor unit of zonal control, control method and air-conditioner set | |
| CN107975924A (en) | The wind turbine of multi fan air-conditioning system starts control method and air-conditioning system | |
| CN106288236A (en) | Air-conditioner compress control method and air-conditioner | |
| CN213873094U (en) | Electric cabinet cooling device and air conditioning unit | |
| CN104676856A (en) | Air conditioner and refrigeration control method thereof | |
| CN109647092A (en) | Air cooling system foreign matters from being blocked detection method, user equipment, storage medium and device | |
| CN107990480A (en) | Air-conditioning equipment dewing-proof method and device | |
| JP2002071188A (en) | Abnormal heating medium supply detection apparatus | |
| CN112361562A (en) | Electric cabinet cooling device, cooling control method and air conditioning unit | |
| CN110470000B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| JPH07158935A (en) | Fan coil unit | |
| CN216281817U (en) | Constant temperature cold water system suitable for wide temperature zone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |