DK201300213A1 - A motor drive controller for a compressor - Google Patents
A motor drive controller for a compressor Download PDFInfo
- Publication number
- DK201300213A1 DK201300213A1 DK201300213A DKPA201300213A DK201300213A1 DK 201300213 A1 DK201300213 A1 DK 201300213A1 DK 201300213 A DK201300213 A DK 201300213A DK PA201300213 A DKPA201300213 A DK PA201300213A DK 201300213 A1 DK201300213 A1 DK 201300213A1
- Authority
- DK
- Denmark
- Prior art keywords
- compressor
- motor drive
- drive controller
- tilt sensor
- motor
- Prior art date
Links
Classifications
-
- 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
- F25B31/00—Compressor arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3225—Cooling devices using compression characterised by safety arrangements, e.g. compressor anti-seizure means or by signalling devices
Abstract
Description
A motor drive controller for a compressor Fie1d o f t he Inventiο nA motor drive controller for a compressor Fie1d o f t he Inventiο n
The present invention concerns motor drive controllers for compressors. More particularly, but not exclusively, this invention concerns a motor drive controller comprising a tilt sensor. The invention also concerns compressors comprising motor drive controllers, refrigeration units, and me t h o d s of c o ntro 11i n g c omp r e s s o r s.The present invention concerns engine drive controllers for compressors. More particularly, but not exclusively, this invention concerns a motor drive controller comprising a tilt sensor. The invention also concerns compressors comprising motor drive controllers, refrigeration units, and me t h o d s of c o ntro 11i n g c omp r e s s o r s.
Background of the InventionBackground of the Invention
Known refrigeration units comprise an insulated enclosure, the interior of which is cooled using a compressor. The compressor is driven by a motor, which is controlled by a variable speed motor drive controller. The motor drive controller incorporates an inverter in order to provide a suitable: power supply to the motor of the compressor .Known refrigeration units comprise an insulated enclosure, the interior of which is cooled using a compressor. The compressor is driven by a motor, which is controlled by a variable speed motor drive controller. The motor drive controller incorporates an inverter in order to provide a suitable: power supply to the motor of the compressor.
Refrigeration units are used in a variety of applications, an example of which is the transportation of perishable goods. Refrigerated units for this use are arranged, to be transported by truck over roads, and may also be arranged to be transferred to a ship, for example, so that they can be transported over sea. The refrigeration units are arranged to be in operation while being transported, in order to keep their contents at a suitable temperature. Of course, although the principles of the invention set out below are relevant for cooling in trucks and other automobile applications, many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired. A known problem with refrigeration units is that damage can occur to the compressor if it is tilted when in operation, for example by an angle of over 30 degrees. This is a particular problem for refrigeration units that are intended to be in operation while being transported. A reason for damage to some compressors when tilted significantly is the temporary absence of required lubrication for the compressor (although other factors may be relevant as 'well as, or instead of, missing lubricant) . A known solution to this problem is to mount a mechanical tilt sensor, for example a mercury tilt switch, on the refrigerator. However, this solution is expensive, and requires a connection between the motor drive controller and the mechanical tilt sensor.Refrigeration units are used in a variety of applications, an example of which is the transportation of perishable goods. Refrigerated units for this use are arranged, to be transported by truck over roads, and may also be arranged to be transferred to a ship, for example, so that they can be transported over sea. The refrigeration units are arranged to be in operation while being transported, in order to keep their contents at a suitable temperature. Of course, although the principles of the invention set out below are relevant for cooling in trucks and other automobile applications, many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired. A known problem with refrigeration units is that damage can occur to the compressor if it is tilted when in operation, for example at an angle of over 30 degrees. This is a particular problem for refrigeration units that are intended to be in operation while being transported. A reason for damage to some compressors when tilted significantly is the temporary absence of required lubrication for the compressor (although other factors may be relevant as 'well as, or instead of, missing lubricant'). A known solution to this problem is to mount a mechanical tilt sensor, for example a mercury tilt switch, on the refrigerator. However, this solution is expensive, and requires a connection between the motor drive controller and the mechanical tilt sensor.
The present invention seeks to mitigate the above-mentioned problems. Alternatively and/or additionally, the present invention seeks to provide improved motor drive controllers for compressors, improved compressors, improved refrigeration units, and improved methods of controllingThe present invention seeks to mitigate the above mentioned problems. Alternatively and / or additionally, the present invention seeks to provide improved motor drive controllers for compressors, improved compressors, improved refrigeration units, and improved methods of controlling
Summary of the InventionSummary of the Invention
In accordance with a first aspect of the invention there is provided a motor drive controller for controlling a motor of a compressor for a refrigeration unit, wherein the motor drive controller comprises an integral tilt sensor arranged to provide a signal indicative of the orientation of the tilt sensor, the motor drive controller being arranged to control the motor of the compressor using the signal from the tilt sensor, and wherein the motor drive controller is arranged to be mounted upon the compressor.In accordance with a first aspect of the invention there is provided a motor drive controller for controlling a motor of a compressor for a refrigeration unit, the motor drive controller comprising an integral tilt sensor arranged to provide a signal indicative of the orientation of the tilt sensor, the motor drive controller being arranged to control the motor of the compressor using the signal from the tilt sensor, and the motor drive controller is arranged to be mounted on the compressor.
By having the tilt sensor an integral part of the motor drive controller, a motor drive controller that is able to prevent or mitigate damage to the compressor as a result of the compressor being tiled can be provided, which is more compact, less complicated and less expensive than known arrangements .By having the tilt sensor an integral part of the motor drive controller, a motor drive controller that is able to prevent or mitigate damage to the compressor as a result of the compressor being tilted can be provided, which is more compact, less complicated and less expensive than known arrangements.
The tilt sensor may be an accelerometer. The accelerometer may be a three-axis linear accelerometer. In one embodiment of the invention, the accelerometer is an STMicroelectronicsiM AIS328DQ "High-performance ultra-low-power 3-axis accelerometer with digital output for automotive applications". Alternatively, the motor drive controller may comprise any other suitable tilt sensor (such as quick silver, mechanical or magnet contact tilt sensors).The tilt sensor may be an accelerometer. The accelerometer may be a three-axis linear accelerometer. In one embodiment of the invention, the accelerometer is an STMicroelectronicsiM AIS328DQ "High-performance ultra-low-power 3-axis accelerometer with digital output for automotive applications". Alternatively, the motor drive controller may comprise any other suitable tilt sensor (such as quick silver, mechanical or magnet contact tilt sensors).
In accordance with a second aspect of the invention there is provided a compressor for a refrigeration unit, wherein the compressor comprises a motor drive controller as described above mounted upon the compressor. Preferably, the motor drive controller is mounted within a motor drive c ο n t roller ho u s i n g.In accordance with a second aspect of the invention there is provided a compressor for a refrigeration unit, the compressor comprising a motor drive controller as described above mounted on the compressor. Preferably, the motor drive controller is mounted within a motor drive c o n t roller ho u s i n g.
In accordance with a third aspect of the invention there is provided a refrigeration unit for an automotive vehicle, comprising a compressor as described above. The automotive vehicle may be a truck (although many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired).In accordance with a third aspect of the invention there is provided a refrigeration unit for an automotive vehicle comprising a compressor as described above. The automotive vehicle may be a truck (although many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired).
In accordance with a fourth aspect of the invention there is provided an automotive vehicle comprising a refrigeration unit as described above. The automotive vehicle may be a truck (although many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired).In accordance with a fourth aspect of the invention there is provided an automotive vehicle comprising a refrigeration unit as described above. The automotive vehicle may be a truck (although many other applications are possible, such as cooling for portable boxes, cars, caravans or anywhere else where mobile refrigeration is desired).
In accordance with a fifth aspect of the invention there is provided a method of controlling a compressor for a refrigeration unit using the motor drive controller as described above, comprising the step of: in response to the signal from the tilt sensor-indicating that it has been tilted more than a first predetermined angle for more than a predetermined duration, preventing operation of the motor of the compressor.In accordance with a fifth aspect of the invention there is provided a method of controlling a compressor for a refrigeration unit using the motor drive controller as described above comprising the step of: in response to the signal from the tilt sensor indicating that it has been tilted more than a first predetermined angle for more than a predetermined duration, preventing operation of the motor of the compressor.
By only preventing operation of the motor of the compressor when it has been tilted for a predetermined duration, the compressor is able to continue operation despite being tilted only for snort, periods which in practice would not cause damage to the compressor. Further, the requirement to be tilted for the predetermined period prevents the compressor being repeatedly turned on and off for very short periods in the case the compressor is maintained at an angle close to the first predetermined angle .By only preventing operation of the compressor motor when it has been tilted for a predetermined duration, the compressor is able to continue operation despite being tilted only for snort, periods which in practice would not cause damage to the compressor. Further, the requirement to be tilted for the predetermined period prevents the compressor from being repeatedly turned on and off for very short periods in case the compressor is maintained at an angle close to the first predetermined angle.
The first predetermined angle may be 30 degrees, although other angles could be relevant in different embodiments of the invention. The predetermined duration may be 5 seconds; again, other durations may be relevant in different embodiments of the invention.The first predetermined angle may be 30 degrees, although other angles may be relevant in different embodiments of the invention. The predetermined duration may be 5 seconds; again, other durations may be relevant in different embodiments of the invention.
Preferably, the method further comprises the step of: in response to the signal from the tilt sensor indicating that the compressor is tilted less than a second predetermined angle less than or equal to the first predetermined angle, allowing operation of the motor of the compressor .Preferably, the method further comprises the step of: in response to the signal from the tilt sensor indicating that the compressor is tilted less than a second predetermined angle less than or equal to the first predetermined angle, allowing operation of the motor of the compressor.
The second, predetermined, angle may be equal to the first predetermined angle.The second, predetermined, angle may be equal to the first predetermined angle.
It will of course be appreciated that features described in relation to one aspect of the present invention may be incorporated into other aspects of the present invention. For example, the method of the invention may incorporate any of the features described with reference to the apparatus of the invention and vice versa.Of course, it will be appreciated that features described in relation to one aspect of the present invention may be incorporated into other aspects of the present invention. For example, the method of the invention may incorporate any of the features described with reference to the apparatus of the invention and vice versa.
Description of the DrawingsDescription of the Drawings
Embodiments of the present invention will now be described by way of example only with reference to the accompanying schematic drawings of which:Embodiments of the present invention will now be described by way of example only with reference to the accompanying schematic drawings of which:
Figure 1 is a compressor in accordance with a first embodiment of the invention;Figure 1 is a compressor in accordance with a first embodiment of the invention;
Figure 2 is the motor drive controller circuitry of the compressor of Figure 1; and Figure 3 is a flow chart showing the operation of the motor drive controller of the compressor of Figure 1.Figure 2 is the motor drive controller circuitry of the compressor of Figure 1; and Figure 3 is a flow chart showing the operation of the motor drive controller of the compressor of Figure 1.
Detailed Description A compressor for a refrigeration unit in accordance with a first embodiment, of the invention is shown in Figure 1, The compressor 1 comprises an enclosure 2, which contains a drive motor and other mechanical parts that provide refrigeration. The enclosure has an inlet port 3 through which liquid refrigerant from the refrigeration unit passes into the compressor 1, and high pressure (compressed) refrigerant passes out of the compressor via a corresponding outlet port 4. Moisture that accumulates in the compressor 1 during operation is expelled via a water port 5.Detailed Description A compressor for a refrigeration unit in accordance with a first embodiment of the invention is shown in Figure 1, The compressor 1 comprises an enclosure 2, which contains a drive motor and other mechanical parts which provide refrigeration. The enclosure has an inlet port 3 through which liquid refrigerant from the refrigeration unit passes into the compressor 1, and high pressure (compressed) refrigerant passes out of the compressor via a corresponding outlet port 4. Moisture that accumulates in the compressor 1 during operation is expelled via a water port 5.
The compressor 1 further comprises a motor drive controller housing 6, which contains the motor drive controller 10 shown in Figure 2. The motor drive controller 10 controls the operation of the motor of the compressor 1 as described below.The compressor 1 further comprises a motor drive controller housing 6, which contains the motor drive controller 10 shown in Figure 2. The motor drive controller 10 controls the operation of the motor of the compressor 1 as described below.
As shown in Figure 2, the motor drive controller 10 comprises a circuit board. 11 on which are mounted the various electronic components making up the motor drive controller 10. These electronic components include in particular a tilt sensor 12. As can be seen, the tilt sensor 12 is a single self-contained component that is mounted directly upon the circuit board 11. The tilt sensor 12 may be an accelerometer, such as an STMicroelectronicslt,J AIS328DQ "High-performance ultra-low-power 3-axis accelerometer with digital output, for automotive applications". This accelerometer comprises suspended silicon structures attached to the substrate of the component at several anchor points. The silicon structures are free to move in the direction of any applied acceleration. Such movement causes a change in capacitance, which is measured using charge integration in response to an applied voltage pulse. The skilled person will be aware of many alternative tilt sensors that could be used (including tilt sensors that are not accelerometers).As shown in Figure 2, the motor drive controller 10 comprises a circuit board. 11 on which are mounted the various electronic components making up the motor drive controller 10. These electronic components include in particular a tilt sensor 12. As can be seen, the tilt sensor 12 is a single self-contained component which is mounted directly upon the circuit board 11. The tilt sensor 12 may be an accelerometer, such as an STMicroelectronicslt, J AIS328DQ "High-performance ultra-low-power 3-axis accelerometer with digital output, for automotive applications". This accelerometer comprises suspended silicon structures attached to the substrate of the component at several anchor points. The silicon structures are free to move in the direction of any applied acceleration. Such movement causes a change in capacitance, which is measured using charge integration in response to an applied voltage pulse. The skilled person will be aware of many alternative tilt sensors that could be used (including tilt sensors that are not accelerometers).
The operation of the motor drive controller 10 to control the motor of the compressor 1 is shown in Figure 3. Following the motor drive controller 10 being first powered up (step 100), the motor drive controller 10 uses the tilt sensor 12 to determine whether the compressor 1 is being tilted more than a predetermined amount, in the present embodiment the first predetermined amount being an angle of 30 degrees or more (steps 101) . If no such tilt is detected, the motor drive controller 10 starts operating the compressor 1 in the usual way (step 102). Such operation may include varying the speed of the compressor as appropriate in order to control the temperature of the refrigeration unit refrigerated by the compressor 1, and may even include stopping the compressor 1 if sufficient refrigeration has occurred.The operation of the motor drive controller 10 to control the motor of the compressor 1 is shown in Figure 3. Following the motor drive controller 10 being first powered up (step 100), the motor drive controller 10 uses the tilt sensor 12 to determine whether the compressor 1 is being tilted more than a predetermined amount, in the present embodiment the first predetermined amount being an angle of 30 degrees or more (steps 101). If no such tilt is detected, the motor drive controller 10 starts operating the compressor 1 in the usual way (step 102). Such operation may include varying the speed of the compressor as appropriate in order to control the temperature of the refrigeration unit refrigerated by the compressor 1, and may even include stopping the compressor 1 if sufficient refrigeration has occurred.
If, on the other hand, the motor drive controller 10 determines from the tilt sensor 12 that the compressor 1 is being tilted more than the predetermined amount, the motor drive controller 10 determines if the tilting is maintained for at least 5 seconds (step 103). If the tilting is maintained, operation of the compressor 1 is prevented (step 104), in order to avoid it becoming damaged. If on the other hand the tilting is not maintained for at least 5 seconds, normal operation of the compressor occurs in accordance with step 102.On the other hand, if the motor drive controller 10 determines from the tilt sensor 12 that the compressor 1 is being tilted more than the predetermined amount, the motor drive controller 10 determines if the tilt is maintained for at least 5 seconds (step 103 ). If the tilting is maintained, operation of the compressor 1 is prevented (step 104), in order to avoid it becoming damaged. On the other hand, the tilting is not maintained for at least 5 seconds, normal operation of the compressor occurs in accordance with step 102.
Thus, it can be seen that the operation of the motor drive controller 10 avoids damage to the compressor 1 as a result of tilting of the compressor 1. However, by waiting for a period of 5 seconds before preventing operation of the compressor 1, repeated cycling of the compressor 1 on and off will be avoided. In alternative embodiments, periods other than 5 seconds can be used. In further alternative embodiments, an angle other than 30 degrees can be used as the threshold for preventing operation of the compressor 1. For example, the duration and angle appropriate for a particular application might depend on the type of compressor being used and on where the compressor is being ' ' S ·Ρ ClThus, it can be seen that the operation of the motor drive controller 10 avoids damage to the compressor 1 as a result of tilting the compressor 1. However, by waiting for a period of 5 seconds before preventing operation of the compressor 1, repeated cycling of the compressor 1 on and off will be avoided. In alternative embodiments, periods other than 5 seconds can be used. In further alternative embodiments, an angle other than 30 degrees may be used as the threshold for preventing operation of the compressor 1. For example, the duration and angle appropriate for a particular application might depend on the type of compressor being used and where compressor is being '' S · Ρ Cl
In one embodiment of the invention, operation of the compressor 1 is resumed only if the compressor 1 is tilted by less than a second threshold angle, which is less than the first threshold angle. For example, operation of the compressor 1 might be prevented if the compressor 1 is titled by an angle of more than 30 degrees for at least 5 seconds (as in the first embodiment above) , but. operation of the compressor 1 resumed only if the compressor 1 is subsequently tiled by an angle of less than 20 degrees.In one embodiment of the invention, operation of the compressor 1 is resumed only if the compressor 1 is tilted by less than a second threshold angle, which is less than the first threshold angle. For example, operation of the compressor 1 might be prevented if the compressor 1 is titled at an angle of more than 30 degrees for at least 5 seconds (as in the first embodiment above), but. Operation of the compressor 1 resumed only if the compressor 1 was subsequently tilted at an angle of less than 20 degrees.
Whilst the present invention has been described and illustrated with reference to particular embodiments, it will be appreciated by those of ordinary skill in the art that the invention lends itself to many different variations not s p e c i f i c a 11 y i 11 ustrated. here i n . F or ex amp 1 e, i t w i 11 be apparent to the skilled person that more complicated methods for operating the motor drive controller than that shown in Figure 3 could be used, in order to better optimise operation of the compressor.While the present invention has been described and illustrated with reference to particular embodiments, it will be appreciated by those of ordinary skill in the art that the invention lends itself to many different variations not s p e c i f i c a 11 y i 11 ustrated. here i n. F or ex amp 1 e, i t w i 11 be apparent to the skilled person that more complicated methods of operating the motor drive controller than that shown in Figure 3 could be used, in order to better optimize operation of the compressor.
Claims (11)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK201300213A DK201300213A1 (en) | 2013-04-11 | 2013-04-11 | A motor drive controller for a compressor |
| DE102014104752.4A DE102014104752B4 (en) | 2013-04-11 | 2014-04-03 | Compressor for a refrigeration unit |
| CN201410146022.9A CN104100507B (en) | 2013-04-11 | 2014-04-11 | Motor drive controller for compressor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK201300213 | 2013-04-11 | ||
| DK201300213A DK201300213A1 (en) | 2013-04-11 | 2013-04-11 | A motor drive controller for a compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK201300213A1 true DK201300213A1 (en) | 2014-10-12 |
Family
ID=51618522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK201300213A DK201300213A1 (en) | 2013-04-11 | 2013-04-11 | A motor drive controller for a compressor |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN104100507B (en) |
| DE (1) | DE102014104752B4 (en) |
| DK (1) | DK201300213A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6751697B2 (en) * | 2017-11-06 | 2020-09-09 | ベバスト サーモアンドコンフォート ジャパン株式会社 | Control method of vehicle air conditioner and vehicle air conditioner |
| DE102019129484A1 (en) * | 2019-10-31 | 2021-05-06 | Miele & Cie. Kg | Method and device for commissioning a cooling device and cooling device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08216674A (en) | 1995-02-09 | 1996-08-27 | Matsushita Electric Ind Co Ltd | Air conditioner for automobile |
| AU2006335521B2 (en) | 2006-01-16 | 2009-11-12 | Mitsubishi Electric Corporation | Drive circuit of motor and outdoor unit of air conditioner |
| US8620521B2 (en) * | 2011-02-18 | 2013-12-31 | Honda Motor Co., Ltd. | Vehicle HVAC water splash prevention method and apparatus |
| AU2012225389B2 (en) | 2011-03-08 | 2015-02-12 | Atwood Mobile Products Llc | Tilt monitor and stress controller for absorption type refrigerator |
| CN102748295B (en) * | 2011-04-18 | 2014-12-03 | 艾默生环境优化技术(苏州)有限公司 | Rotary compressor and rotary machine |
| CN202132220U (en) | 2011-06-10 | 2012-02-01 | 思科普压缩机(天津)有限公司 | Compressor circuit having protection function and compressor including the same |
-
2013
- 2013-04-11 DK DK201300213A patent/DK201300213A1/en not_active Application Discontinuation
-
2014
- 2014-04-03 DE DE102014104752.4A patent/DE102014104752B4/en active Active
- 2014-04-11 CN CN201410146022.9A patent/CN104100507B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102014104752B4 (en) | 2022-03-31 |
| CN104100507A (en) | 2014-10-15 |
| DE102014104752A1 (en) | 2014-10-16 |
| CN104100507B (en) | 2018-02-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PHB | Application deemed withdrawn due to non-payment or other reasons |
Effective date: 20150430 |