CN112577218A - Refrigerating unit for vehicle, control method of refrigerating unit and refrigerator car - Google Patents
Refrigerating unit for vehicle, control method of refrigerating unit and refrigerator car Download PDFInfo
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- CN112577218A CN112577218A CN202011554898.9A CN202011554898A CN112577218A CN 112577218 A CN112577218 A CN 112577218A CN 202011554898 A CN202011554898 A CN 202011554898A CN 112577218 A CN112577218 A CN 112577218A
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000005494 condensation Effects 0.000 claims abstract description 36
- 238000009833 condensation Methods 0.000 claims abstract description 36
- 238000012544 monitoring process Methods 0.000 claims abstract description 5
- 238000005057 refrigeration Methods 0.000 claims description 28
- 238000009434 installation Methods 0.000 claims description 8
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 230000008859 change Effects 0.000 description 5
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- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/20—Refrigerated goods vehicles
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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
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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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
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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
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
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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
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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- Transportation (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a refrigerating unit for a vehicle, a control method of the refrigerating unit and a refrigerator car. Wherein, the method comprises the following steps: monitoring the current speed of the vehicle; controlling a driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser; the condenser is rotationally arranged in the refrigerating outer machine, an included angle between a heat exchange surface of the condenser and the air inlet direction of the refrigerating outer machine is an inclined angle, the driving device is in driving connection with the condenser, and the driving device can drive the condenser to adjust the inclined angle. When the controller of the refrigerating unit acquires that the vehicle is located at a certain vehicle speed, the condenser is adjusted through the driving device and controlled to the inclination angle with the optimal air inlet effect. Therefore, the problem that the condenser with a fixed inclination angle cannot enable the condensation air duct to be in the best air inlet effect all the time in the prior art is solved. By adjusting the placement angle of the condenser in real time, the air inlet volume of the condensation air duct can be maximized, and the condensation air duct is in the best air inlet effect constantly.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a refrigerating unit for a vehicle, a control method of the refrigerating unit and a refrigerated vehicle.
Background
In the prior art, the air intake of the condensation side of the refrigerator unit of the refrigerator car changes along with the change of the car speed, but the traditional refrigerator unit of the refrigerator car only arranges a certain inclination angle (generally 6-22 degrees) with the horizontal direction when the condenser is arranged so as to utilize the windward side of the car when the car runs. Although the method can improve the heat exchange capability of the condenser to a certain extent, the air intake of the windward side of the condenser is different along with the change of the vehicle speed, so that the condenser with the fixed inclination angle cannot enable the condensing air duct to be in the best air intake effect all the time.
Aiming at the problem that the condenser with a fixed inclination angle in the prior art cannot enable a condensation air duct to be in the best air inlet effect all the time, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a refrigerating unit for a vehicle, a control method of the refrigerating unit and a refrigerated vehicle, and aims to solve the problem that a condenser with a fixed inclination angle cannot enable a condensation air duct to be in an optimal air inlet effect all the time in the prior art.
In order to solve the technical problem, the invention provides a control method of a refrigerating unit, wherein the method comprises the following steps: monitoring the current speed of the vehicle; controlling a driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser; the condenser is rotatably arranged in the refrigerating outer machine, the included angle between the heat exchange surface of the condenser and the air inlet direction of the refrigerating outer machine is the inclined angle, the driving device is in driving connection with the condenser, and the driving device can drive the condenser to adjust the inclined angle.
Further, controlling the driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser comprises the following steps: determining a corresponding inclination angle according to the current vehicle speed; controlling the driving device so as to adjust the inclination angle of the condenser to the determined inclination angle.
Further, determining the inclination angle corresponding to the current vehicle speed according to the current vehicle speed comprises the following steps: if the current vehicle speed V is less than the preset vehicle speed threshold value, determining an inclination angle alpha corresponding to the current vehicle speed V according to the following formula: alpha is V/h; h is a preset constant; and if the current vehicle speed V is larger than or equal to the preset vehicle speed threshold value, determining that the inclination angle corresponding to the current vehicle speed is a preset maximum value.
Further, controlling the driving device so as to adjust the inclination of the condenser to the determined inclination includes: controlling the number of rotation turns of a motor of the driving device to adjust the height of a sliding block assembly of the driving device; the two installation supporting points in the length direction of the condenser respectively correspond to one driving device, and the inclination angle of the condenser is adjusted by adjusting the height difference of the sliding block assemblies of the driving devices at the two installation supporting points.
Further, after controlling the driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser, the method further comprises: determining a distance H1 between the structural center point of the condenser and a condensation fan and a distance H2 between the structural center point of the condenser and a chassis; and judging whether H2 is less than or equal to H1, if not, controlling the motor of the driving device to rotate until H2 is less than or equal to H1.
Further, after monitoring the current vehicle speed of the vehicle, the method further comprises: and adjusting the rotating speed of the condensing fan according to the current vehicle speed.
Further, according to the rotational speed of current speed of a motor vehicle adjustment condensation fan, include: if the current speed is less than a first preset value, controlling the condensing fan to keep a rated rotating speed; if the current vehicle speed is less than or equal to a second preset value, reducing the rotating speed of the condensing fan according to a preset proportion; and if the current vehicle speed is larger than a second preset value, closing the condensing fan.
The present invention also provides a refrigeration unit for a vehicle, comprising: the air inlet direction of the refrigeration outer machine is parallel to the running direction of the vehicle; the condenser is rotatably arranged in the refrigerating external machine, and an included angle between a heat exchange surface of the condenser and the air inlet direction is an inclined angle; the driving device is in driving connection with the condenser and can drive the condenser to adjust the inclination angle.
Furthermore, the condenser at least comprises two mounting fulcrums, the number of the driving devices is at least two, each driving device is correspondingly connected to one mounting fulcrum, and each driving device can drive and adjust the distance between the corresponding mounting fulcrum and the chassis; all the driving devices adjust the position and the inclination angle of the condenser by adjusting the position of the mounting fulcrum.
Further, the driving device includes: a motor mounted on the chassis; the screw rod is in driving connection with the motor output shaft; and the sliding block assembly is in threaded connection with the screw rod and is fixedly connected with the corresponding mounting fulcrum.
The invention also provides a refrigerator car, wherein the refrigerator unit for the vehicle is included.
The invention also provides a computer-readable storage medium, on which a computer program is stored, wherein the program, when executed by a processor, implements the method as described above.
Along with the change of the vehicle speed, the air intake of the windward side of the condenser is different, so that the fixed inclination angle cannot enable the condensation air duct to be in the best air intake effect all the time. Therefore, the refrigerating unit of the invention adjusts the position and the inclination angle of the condenser through the driving device so as to adjust the inclination angle of the condenser and the air inlet direction. The refrigeration unit is communicated with the vehicle and obtains real-time vehicle speed, and when the controller of the refrigeration unit obtains that the vehicle is located at a certain vehicle speed, the condenser is adjusted through the driving device and controlled to the inclination angle with the optimal air inlet effect. By adjusting the placement angle of the condenser in real time, the air inlet volume of the condensation air duct can be maximized, and the condensation air duct is in the best air inlet effect constantly.
Drawings
FIG. 1 is a schematic block diagram of a refrigeration unit for a vehicle according to one embodiment of the present invention;
fig. 2 is a schematic view of a structure of an outdoor unit of the refrigeration unit for a vehicle of fig. 1;
fig. 3 is a partially enlarged schematic view of the outdoor unit of fig. 2;
FIG. 4 is a flow chart of a method of controlling a refrigeration unit according to an embodiment of the present invention;
fig. 5 is a logic diagram of a control device for a refrigeration unit in accordance with an 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.
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
Referring to fig. 1 to 3, according to an embodiment of the present invention, a refrigeration unit for a vehicle is provided, including an outdoor refrigeration unit 10, a condenser 20, a driving device 30, and an indoor refrigeration unit 50, where an air intake direction of the outdoor refrigeration unit 10 is parallel to a traveling direction of the vehicle. The condenser 20 is rotatably arranged in the outdoor unit 10, and an inclination angle is formed between a heat exchange surface of the condenser 20 and an air inlet direction; the driving device 30 is in driving connection with the condenser 20, and the driving device 30 can drive the condenser 20 to adjust the inclination angle.
As further described with reference to fig. 2 and fig. 3, the heat exchange surface of the condenser 20 is a heat exchange surface formed by the structure of the condenser itself, and generally refers to the largest-area outer surface of the condenser 20, or refers to a heat exchange surface formed by fitting the condenser 20 as a whole.
Along with the change of the vehicle speed, the air intake of the windward side of the condenser is different, so that the fixed inclination angle cannot enable the condensation air duct to be in the best air intake effect all the time. Therefore, the refrigerating unit of the invention adjusts the position and the inclination angle of the condenser through the driving device so as to adjust the inclination angle of the condenser and the air inlet direction. The refrigeration unit is communicated with the vehicle and obtains real-time vehicle speed, and when the controller of the refrigeration unit obtains that the vehicle is located at a certain vehicle speed (for example, 60km/h), the condenser is adjusted through the driving device and is controlled to be at an inclination angle (for example, 11 degrees) with the optimal air intake effect. By adjusting the placement angle of the condenser in real time, the air inlet volume of the condensation air duct can be maximized, and the condensation air duct is in the best air inlet effect constantly.
Further, the refrigeration outdoor unit 10 includes an outer casing 11, a condensation air duct 12 is formed inside the outer casing 11, and a condenser 20 is disposed in the condensation air duct 12; an air inlet 13 and an air outlet 14 are arranged on the outer shell 11, and both the air inlet 13 and the air outlet 14 are communicated with the condensation air duct 12. In this embodiment, the condensation duct 12 is enclosed by canvas inside the outer casing 11, but may be enclosed by structures made of other materials in other embodiments.
Referring to fig. 2, the outer housing 11 includes a top plate 15 and a chassis 16, and the chassis 16 is a bottom base structure of the outer housing 11 and is mainly used for mounting on the roof of the vehicle. An air outlet 14 is arranged on the top plate 15, and a condensing fan 40 is arranged at the air outlet 14; at least part of the condensation air duct 12 is formed between the top plate 15 and the bottom plate 16, and the condenser 20 is located between the top plate 15 and the bottom plate 16. Through setting up air outlet 14 on roof 15, the direct discharge from the roof of the amount of wind of leading-in to outer machine 10 of refrigeration in the vehicle driving process can make the amount of wind air current more unobstructed like this, and heat exchange efficiency is higher.
In order to make the air intake direction of the structure-fitted cooling outdoor unit parallel to the traveling direction of the vehicle, in this embodiment, the air intake 13 is disposed toward the traveling direction of the vehicle, and fig. 2 and 3 show the position of the air intake 13 and the air intake direction.
The air inlet 13 is located at the bottom of the outer casing 11, and the air outlet 14 is located at the top of the outer casing 11. In the running process of the vehicle, the air quantity is introduced from the air inlet 13 at the bottom, passes through the condenser 20 at the middle part and is discharged from the top plate, so that the air flow of the air quantity is smoother, and the heat exchange efficiency is higher.
Referring to fig. 3, the distance between the structural center point of the condenser 20 and the condensing fan 40 is H1, and the distance between the structural center point of the condenser 20 and the chassis 16 is H2; the driving device 30 may drive the condenser 20 to move to adjust H1 and H2. The structural center point of the condenser 20 may also be the center point of the heat exchange fitting volume of the condenser 20, or the center point of the heat exchange surface of the condenser 20.
After the desired inclination of the condenser is adjusted, the distance H1 between the condenser 20 and the condensing fan 40 and the distance H2 between the condenser 20 and the chassis 16 need to be calculated again. If H1 is less than H2, the height H1 is raised by the drive means such that H1 is eventually greater than or equal to H2. The control principle is that H1 is always kept to be larger than H2 or H1 is equal to H2, two distance parameters of H1 and H2 are set and fed back to a specific structure, the structure can ensure that the condensation air channel is in an optimal state all the time, when H1 is equal to H2, the air resistance of the condensation air channel is minimum, the windward side and the air inlet heat exchange can be utilized to the maximum degree, and the air suction efficiency of the condensation fan is higher.
Further preferably, the condenser 20 of the present embodiment has a plate-shaped structure as a whole, and the structural center point of the condenser 20 is located at the center of the plate-shaped structure. The side surfaces of the plate-like structure of the condenser 20 are parallel to the heat exchange surfaces of the condenser 20. Since the physical shape of the condenser 20 is relatively fixed, it is possible to define a structural center point and a heat exchange surface. The condenser with the plate-shaped structure is more beneficial to adjusting the preset angle and the windward side, and the structure can improve the heat exchange efficiency.
Preferably, the drive means 30 is mounted on the chassis 16 and the condenser 20 is connected to the drive means 30. That is, the condenser 20 is directly mounted on the driving device 30, and the driving device 30 can directly rotate or move the condenser to adjust the inclination angle and height position (height of the condenser from the chassis) of the condenser.
Referring to fig. 2 and 3, the condenser 20 includes at least two mounting fulcrums 21, and at least two driving devices 30, each driving device 30 is correspondingly connected to one of the mounting fulcrums 21, and each driving device 30 can drive and adjust a distance between the corresponding mounting fulcrum 21 and the chassis 16. All the driving devices 30 adjust the position and the inclination angle of the condenser 20 by adjusting the position of the mounting fulcrum 21. Each driving device 30 can adjust the height of the mounting fulcrum 21, so as to directly or indirectly adjust the position of the condenser 20, generally speaking, at least two mounting fulcrums 21 can be adjusted to the inclination angle of the condenser 20, and more mounting fulcrums can enable the adjustment to be more refined. If the height relation between H1 and H2 needs to be adjusted, the driving device 30 can directly move the position of the mounting fulcrum 21 to meet the adjustment requirement.
Further, at least two mounting fulcrums 21 are provided on both ends of the condenser 20 in the length direction or the width direction, respectively. The arrangement at the above-mentioned position can save the number of the mounting fulcrums 21 to the maximum extent, and at the same time, can control the inclination angle of the heat exchanger to the maximum efficiency, and the specific position can be seen in fig. 2 and fig. 3, in this embodiment, although there are only two mounting fulcrums 21 (the positions of the two mounting fulcrums 21 can also be understood as the front end and the rear end in a certain direction of the condenser), the adjustment efficiency is also the highest.
It should be noted that the length of the condenser refers to the length of the longest portion of the condenser, and the condenser is configured to have a length, a width, and a thickness, and the length of the condenser is greater than the width and the length is greater than the thickness. If the condenser is a rectangular plate-shaped structure as shown in fig. 2, the length of the condenser is the length of the long side of the rectangle, i.e. the length of the condenser from left to right in fig. 2.
The two installation supporting points 21 are introduced, that is, two driving devices 30 are correspondingly provided, each driving device 30 comprises a motor 31, a screw rod 32 and a sliding block assembly 33, the motor 31 is installed on the chassis 16, the screw rod 32 is in driving connection with an output shaft of the motor 31, the sliding block assembly 33 is in threaded connection with the screw rod 32, and the sliding block assembly 33 is fixedly connected with the corresponding installation supporting point 21. As can be seen in fig. 3, by controlling the number of rotations of the two motors 31, the height of the slider assembly 33 can be affected, and if the heights of the two slider assemblies 33 are different, the inclination angle of the condenser can be affected.
The screw rod 32 is driven to rotate by controlling the rotation of the motor 31 (stepping motor), and the up-and-down movement of the sliding block assembly 33 can be realized under the rotation of the screw rod 32. Because the front and back both ends of condenser are connected with two sliding block set 33 respectively, reciprocate the in-process at sliding block set 33, adjust the angle alpha of presetting of condenser, the drive arrangement 30 of this embodiment is two, and two drive arrangement 30 can the independent control, and then distinguish the position of two sliding block set 33, under two sliding block set 33's cooperation, accomplish the adjustment of placing the position to the condenser. By adjusting the height of the sliding block component 33, the placing inclination angle alpha of the condenser is more than or equal to 0 degree and less than or equal to 22 degrees, and the distance between the condenser and the chassis is more than or equal to H2 and less than or equal to H1.
Preferably, the vehicle is a refrigerator car, and the outdoor unit 10 is installed at a top position of the refrigerator car. The refrigerating unit can be applied to a refrigerator car, can automatically adjust the placing inclination angle of the condenser, can realize the maximization of the air inlet amount of the condensing air duct, saves more energy and can reduce the cost of the refrigerator car.
Example 2
Fig. 4 is a flowchart of a control method of a refrigeration unit according to an embodiment of the present invention, as shown in fig. 4, the method including the steps of:
step S401, the current speed of the vehicle is monitored. When the vehicle speed control method is applied specifically, the current vehicle speed of the vehicle can be obtained through communication with the vehicle;
step S402, controlling a driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser;
the condenser is rotatably arranged in the refrigerating outer machine, an included angle between a heat exchange surface (particularly one end of the condenser close to the air inlet) of the condenser and the air inlet direction of the refrigerating outer machine is the inclined angle, the driving device is in driving connection with the condenser, and the driving device can drive the condenser to adjust the inclined angle.
The position and the inclination angle of the condenser are adjusted through the driving device so as to adjust the inclination angle of the condenser and the air inlet direction. The refrigeration unit is communicated with the vehicle and obtains real-time vehicle speed, and when the controller of the refrigeration unit obtains that the vehicle is located at a certain vehicle speed, the condenser is adjusted through the driving device and controlled to the inclination angle with the optimal air inlet effect. By adjusting the placement angle of the condenser in real time, the air inlet volume of the condensation air duct can be maximized, and the condensation air duct is in the best air inlet effect constantly.
In specific application, after the current speed of a vehicle is monitored, the corresponding inclination angle is determined according to the current speed. In this embodiment, a calculation formula of the vehicle speed and the inclination angle is set. In the case where the vehicle speed V is less than a preset vehicle speed threshold value (e.g., 60km/h), the inclination angle α is V/h, h is a preset constant, and may be set to 3, for example, and in the case where the vehicle speed V ≧ the preset vehicle speed threshold value, the inclination angle is set to a preset maximum value.
After the inclination corresponding to the current vehicle speed is determined, the driving device is controlled so that the inclination of the condenser is adjusted to the determined inclination. Specifically, the number of turns of a motor of the driving device is controlled to adjust the height of a slide block assembly of the driving device; the two installation supporting points of the condenser respectively correspond to one driving device, and the inclination angle of the condenser is influenced by the height difference of the sliding block assemblies of the driving devices at the two installation supporting points. Referring to fig. 3, two motors 31 drive the height of two slider assemblies 33 to change, and the difference in height between the two slider assemblies 33 affects the inclination angle of the condenser.
After the driving device is controlled according to the current vehicle speed so as to adjust the inclination angle of the condenser, the distance H1 between the structural center point of the condenser and the condensing fan and the distance H2 between the structural center point of the condenser and the chassis can be determined; and if the H1 is not equal to the H2, controlling the motor of the driving device to rotate until the H1 is equal to the H2. Referring to fig. 3, the distance between H1 and H2 is adjusted by controlling the rotation of the two motors 31 so that they are finally kept consistent. When H1 equals H2, the windage of condensation wind channel is minimum, and can utilize windward side and the heat transfer of air inlet by the at utmost, and the condensation fan induced draft efficiency is higher.
The present embodiment also provides a preferable embodiment that after the driving device is controlled according to the current vehicle speed to adjust the inclination angle of the condenser, the distance H1 between the structural center point of the condenser and the condensing fan and the distance H2 between the structural center point of the condenser and the chassis can be determined; and judging whether H2 is less than or equal to H1, if not, controlling the motor of the driving device to rotate until H2 is less than or equal to H1. Thereby can reduce the windage in condensation wind channel, improve condensation fan's the efficiency of induced drafting.
In order to ensure that the condensation air quantity can meet the air quantity required by the working condition, the rotating speed of the condensation fan can be adjusted according to the current vehicle speed while the inclination angle of the condenser is adjusted according to the current vehicle speed. Specifically, if the current vehicle speed is less than a first preset value, controlling the condensing fan to keep a rated rotating speed; if the first preset value is smaller than or equal to the current vehicle speed and smaller than or equal to the second preset value, reducing the rotating speed of the condensing fan according to a preset proportion; and if the current vehicle speed is larger than a second preset value, closing the condensing fan. The first preset value is less than the second preset value, and in a specific application, the first preset value can be set to be 30km/h, and the second preset value can be set to be 60 km/h.
The refrigeration unit described in the above embodiment may further include a controller to implement the above control method. The controller is electrically connected with the driving device, and the control device is used for controlling the driving device according to the vehicle speed. Fig. 5 is a logic diagram of a control apparatus of a refrigerating unit according to an embodiment of the present invention, and as shown in fig. 5, a controller of the refrigerating unit communicates with a speedometer of a vehicle and obtains a real-time vehicle speed, assuming that vehicle speeds V are 0km/h to 120km/h respectively corresponding to an inclination angle α of a condenser of 0 ° to 22 °. When the controller of the refrigerating unit of the refrigerated vehicle detects that the vehicle is at a certain vehicle speed (for example 60km/h) at the time, the control logic determines that the inclination angle alpha of the condenser needs to be controlled at 11 degrees at the time. Further, the controller raises and lowers the heights of the two sliding block assemblies by controlling the number of rotation turns of the two motors (the stepping motor 1 and the stepping motor 2) so that the inclination angle alpha of the condenser reaches 11 degrees. Furthermore, the controller can adjust the height relationship between H1 and H2 to ensure that the condensation duct is in an optimal state all the time. Specifically, if H2 is less than H1, then both motors are controlled to rotate simultaneously, raising height H2 so that H2 is ultimately equal to H1. If H2 is greater than H1, the two motors are controlled to rotate simultaneously, and the height H2 is reduced, so that H2 is equal to H1 finally. Therefore, the condensation air channel can be ensured to be in an optimal state (the windward side or the condensation fan is utilized to absorb air to the maximum extent).
The controller is electrically connected with the condensation fan and is used for adjusting the rotating speed of the condensation fan according to the vehicle speed. When the vehicle speed V is less than 30km/h, the controller controls the condensing fan to keep the rated rotating speed. And if the vehicle speed is more than or equal to 30km/h and less than or equal to 60km/h, reducing the rotating speed of the condensing fan according to a preset proportion, for example, if the current vehicle speed is more than or equal to 45km/h, reducing the fan input by 50%. If the vehicle speed V is more than 60km/h, the condensing fan is completely closed, and the air quantity required by heat exchange of the condenser is provided by the windward side of the vehicle. Therefore, the condensing air quantity can meet the air quantity required by the limit working condition at any moment, and when the vehicle speed is more than 30km/h, the reduced fan power can enable the unit to achieve the energy-saving effect.
Example 3
The embodiment of the present invention provides software for implementing the technical solutions described in the above embodiments and preferred embodiments.
Embodiments of the present invention provide a non-volatile computer storage medium, where the computer storage medium stores computer-executable instructions, and the computer-executable instructions may execute a method for controlling a refrigeration unit in any of the above method embodiments.
The storage medium stores the software, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
The product can execute the method provided by the embodiment of the invention, and has corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.
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 (12)
1. A method of controlling a refrigeration unit, the method comprising:
monitoring the current speed of the vehicle;
controlling a driving device according to the current vehicle speed so as to adjust the inclination angle of the condenser;
the condenser is rotatably arranged in the refrigerating outer machine, the included angle between the heat exchange surface of the condenser and the air inlet direction of the refrigerating outer machine is the inclined angle, the driving device is in driving connection with the condenser, and the driving device can drive the condenser to adjust the inclined angle.
2. The method of claim 1, wherein controlling the drive device to adjust the inclination of the condenser based on the current vehicle speed comprises:
determining a corresponding inclination angle according to the current vehicle speed;
controlling the driving device so as to adjust the inclination angle of the condenser to the determined inclination angle.
3. The method of claim 2, wherein determining the inclination angle corresponding thereto based on the current vehicle speed comprises:
if the current vehicle speed V is less than the preset vehicle speed threshold value, determining an inclination angle alpha corresponding to the current vehicle speed V according to the following formula: alpha is V/h; h is a preset constant;
and if the current vehicle speed V is larger than or equal to the preset vehicle speed threshold value, determining that the inclination angle corresponding to the current vehicle speed is a preset maximum value.
4. The method of claim 2, wherein controlling the drive device to adjust the inclination of the condenser to the determined inclination comprises:
controlling the number of rotation turns of a motor of the driving device to adjust the height of a sliding block assembly of the driving device; the two installation supporting points in the length direction of the condenser respectively correspond to one driving device, and the inclination angle of the condenser is adjusted by adjusting the height difference of the sliding block assemblies of the driving devices at the two installation supporting points.
5. The method of claim 2, wherein after controlling the driving device to adjust the inclination angle of the condenser according to the current vehicle speed, the method further comprises:
determining a distance H1 between the structural center point of the condenser and a condensation fan and a distance H2 between the structural center point of the condenser and a chassis;
and judging whether H2 is less than or equal to H1, if not, controlling the motor of the driving device to rotate until H2 is less than or equal to H1.
6. The method of claim 2, wherein after monitoring the current vehicle speed of the vehicle, the method further comprises:
and adjusting the rotating speed of the condensing fan according to the current vehicle speed.
7. The method of claim 6, wherein adjusting the condensing fan speed based on the current vehicle speed comprises:
if the current speed is less than a first preset value, controlling the condensing fan to keep a rated rotating speed;
if the current vehicle speed is less than or equal to a second preset value, reducing the rotating speed of the condensing fan according to a preset proportion;
and if the current vehicle speed is larger than a second preset value, closing the condensing fan.
8. A refrigeration unit for a vehicle, comprising:
the air inlet direction of the refrigeration outer machine is parallel to the running direction of the vehicle;
the condenser is rotatably arranged in the refrigerating external machine, and an included angle between a heat exchange surface of the condenser and the air inlet direction is an inclined angle;
the driving device is in driving connection with the condenser and can drive the condenser to adjust the inclination angle.
9. The refrigeration unit as set forth in claim 8,
the condenser at least comprises two mounting supporting points, at least two driving devices are arranged on the condenser, each driving device is correspondingly connected to one mounting supporting point, and each driving device can drive and adjust the distance between the corresponding mounting supporting point and the chassis;
all the driving devices adjust the position and the inclination angle of the condenser by adjusting the position of the mounting fulcrum.
10. The refrigeration unit as set forth in claim 9 wherein said drive means includes:
a motor mounted on the chassis;
the screw rod is in driving connection with the motor output shaft;
and the sliding block assembly is in threaded connection with the screw rod and is fixedly connected with the corresponding mounting fulcrum.
11. A refrigerator car characterized by comprising a refrigeration unit for a vehicle as claimed in any one of claims 8 to 10.
12. 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 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011554898.9A CN112577218A (en) | 2020-12-24 | 2020-12-24 | Refrigerating unit for vehicle, control method of refrigerating unit and refrigerator car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011554898.9A CN112577218A (en) | 2020-12-24 | 2020-12-24 | Refrigerating unit for vehicle, control method of refrigerating unit and refrigerator car |
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| CN112577218A true CN112577218A (en) | 2021-03-30 |
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| CN202011554898.9A Pending CN112577218A (en) | 2020-12-24 | 2020-12-24 | Refrigerating unit for vehicle, control method of refrigerating unit and refrigerator car |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113733847A (en) * | 2021-08-18 | 2021-12-03 | 珠海格力电器股份有限公司 | Method for preventing condensed water from overflowing from air outlet and related equipment |
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Application publication date: 20210330 |