CN109737654B - Blocking detection method and unit capable of detecting blocking - Google Patents
Blocking detection method and unit capable of detecting blocking Download PDFInfo
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- CN109737654B CN109737654B CN201811510670.2A CN201811510670A CN109737654B CN 109737654 B CN109737654 B CN 109737654B CN 201811510670 A CN201811510670 A CN 201811510670A CN 109737654 B CN109737654 B CN 109737654B
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 59
- 238000001514 detection method Methods 0.000 title claims abstract description 32
- 238000001704 evaporation Methods 0.000 claims abstract description 72
- 230000008020 evaporation Effects 0.000 claims abstract description 72
- 238000000034 method Methods 0.000 claims abstract description 50
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000013507 mapping Methods 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims 3
- 238000003466 welding Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention discloses a blockage detection method and a unit capable of detecting blockage. Wherein the method comprises the following steps: acquiring the evaporation temperature of an evaporator; determining whether a throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature; and under the condition that the throttling device is in a partial blocking state, acquiring the pre-throttling temperature and the post-throttling temperature of the throttling device, and determining the blocking position according to the pre-throttling temperature and the post-throttling temperature. By the method, whether the throttling device is blocked or not can be automatically detected, the blocking position can be accurately positioned, and the problems of low system heat exchange efficiency and high exhaust temperature of the compressor caused by the fact that the blocking of the throttling device is not found in time are prevented. Frequent start and stop of the unit are avoided, and the compressor is damaged.
Description
Technical Field
The invention relates to the technical field of units, in particular to a blocking detection method and a unit capable of detecting blocking.
Background
A conventional refrigeration apparatus includes a compressor, a condenser, an evaporator, and a throttle device (e.g., a throttle capillary tube), and is pre-charged with a certain amount of refrigerant. In the running process of the air conditioner, impurities (such as welding slag, water and the like) are often doped in the system, or welding blockage occurs when welding is performed, so that the air conditioner is easy to block a throttling device after running for a period of time, and the exhaust temperature of the compressor is high, so that the compressor is damaged. It is therefore necessary to detect whether the restriction is clogged.
Aiming at the problem that a throttling device is easy to block in the prior art, no effective solution is proposed at present.
Disclosure of Invention
The embodiment of the invention provides a blockage detection method and a unit capable of detecting blockage, which are used for solving the problem that a throttling device is easy to block in the prior art.
In order to solve the technical problems, the invention provides a blockage detection method, which comprises the following steps: acquiring the evaporation temperature of an evaporator; determining whether a throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature; and under the condition that the throttling device is in a partial blocking state, acquiring the pre-throttling temperature and the post-throttling temperature of the throttling device, and determining the blocking position according to the pre-throttling temperature and the post-throttling temperature.
Further, determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature comprises: comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result.
Further, determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result comprises: if Tz > Tz1, determining that the throttle device is in an unblocked state; if Tz < Tz2, determining that the throttle device is in a full blocking state; if Tz2 < Tz1, the throttle device is determined to be in a partially blocked state.
Further, after determining that the throttling device of the unit is in an unblocked state, a totally blocked state or a partially blocked state according to the evaporation temperature, the method further comprises: triggering the unit to enter a conventional control mode under the condition that the throttling device is in an unblocked state; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
Further, determining a plugging position based on the pre-throttling temperature and the post-throttling temperature includes: calculating the average throttle temperature T according to the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; average temperature T of the throttle Are all And comparing the throttle temperature with a preset throttle temperature T0, and determining the blocking position according to a comparison result.
Further, the throttle average temperature T Are all Comparing with a preset throttling temperature T0, determining the blocking position according to the comparison result, and comprising the following steps: if T Are all If the flow rate is not less than T0, determining that the blocking position is at the throttling back pipe section; if T Are all And < T0, determining that the blockage position is in the pre-restriction pipe section.
Further, after determining the plugging position based on the pre-throttle temperature and the post-throttle temperature, the method further comprises: generating a blockage report and sending the blockage report to a user; wherein, the blockage position is recorded in the blockage report; after determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature, the method further comprises: generating a blockage report and sending the blockage report to a user when the throttling device is in all blockage states; wherein, the jam report records that the jam position is located on the throttle pipe section.
Further, the method further comprises: monitoring the number of times a blockage report is generated; if the number of times of generating the blockage report exceeds the preset number of times, the control unit is closed, and a user is prompted to maintain the throttling device.
Further, the first preset evaporation temperature Tz1 is the evaporation temperature of the evaporator measured by a normal machine set under a standard working condition; the second preset evaporation temperature Tz2 is the measured evaporation temperature of the evaporator after the throttling device is blocked by a normal machine set under the standard working condition.
Further, the preset throttling temperature T0 is an average value of the pre-throttling temperature and the post-throttling temperature of the throttling device measured by a normal machine set under a standard working condition.
Further, the throttling device is a throttling capillary.
The invention also provides a unit capable of detecting a blockage, wherein the unit comprises: the device comprises an evaporator, a throttling device and a blockage detection device, wherein the evaporator is connected with the throttling device, and the blockage detection device is used for determining that the throttling device is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature of the evaporator; and determining the blocking position according to the pre-throttling temperature and the post-throttling temperature of the throttling device under the condition that the throttling device is determined to be in a partial blocking state.
Further, the unit further includes: the first sensor is arranged on a pipeline of the evaporator and is used for acquiring the evaporation temperature of the evaporator; the second sensor is arranged on a throttling front pipe section of the throttling device and is used for acquiring the temperature before throttling; and the third sensor is arranged on a throttling back pipe section of the throttling device and used for acquiring the temperature after throttling.
Further, the jam detection device includes: the comparison module is used for comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; and the state determining module is used for determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result.
Further, the state determining module is specifically configured to determine that the throttling device is in an unblocked state when Tz > Tz 1; determining that the throttle device is in an all-blocked state if Tz < Tz 2; in the case of Tz2 < Tz1, it is determined that the throttle device is in a partially blocked state.
Further, the jam detection device further includes: the control module is used for triggering the unit to enter a conventional control mode under the condition that the throttling device is determined to be in an unblocked state; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
Further, the jam detection device further includes: a calculation module for calculating a throttle average temperature T according to the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; a position determining module for determining the throttle average temperature T Are all And comparing the throttle temperature with a preset throttle temperature T0, and determining the blocking position according to a comparison result.
Further, the location determining module is specifically configured to, at T Are all Under the condition that the blocking position is not less than T0, determining that the blocking position is at the throttling back pipe section; at T Are all In the case of < T0, the position of the blockage is determined at the throttle front pipe section.
Further, the jam detection device further includes: the report module is used for generating a blockage report and sending the blockage report to a user after determining the blockage position according to the temperature before throttling and the temperature after throttling; wherein, the blockage position is recorded in the blockage report; the throttle device is also used for generating a blockage report and sending the blockage report to a user under the condition that the throttle device is determined to be in all blockage states; wherein, the jam report records that the jam position is located on the throttle pipe section.
Further, the jam detection device further includes: the protection module is used for monitoring the times of generating the blocking report; if the number of times of generating the blockage report exceeds the preset number of times, the control unit is closed, and a user is prompted to maintain the throttling device.
Further, the throttling device is a throttling capillary.
The invention also provides a computer readable storage medium, characterized in that the computer readable storage medium stores a computer program of signal mapping, which computer program, when being executed by at least one processor, implements the method of any of claims 1-11.
By adopting the technical scheme of the invention, whether the throttling device is blocked or not can be automatically detected, the blocking position can be accurately positioned, and the problems of low heat exchange efficiency of the system and high exhaust temperature of the compressor caused by the fact that the blocking of the throttling device is not found in time are prevented. Frequent start and stop of the unit are avoided, the compressor is damaged, and the service life of the unit is prolonged.
Drawings
FIG. 1 is a flow chart of a method of jam detection according to an embodiment of the invention;
FIG. 2 is a flow chart of an automatic detection of a blockage by a unit according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a unit structure according to an embodiment of the invention;
fig. 4 is a schematic structural view of a unit capable of detecting clogging according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the drawings and the specific embodiments, it being understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present invention, and have no specific meaning per se. Thus, "module," "component," or "unit" may be used in combination.
Example 1
FIG. 1 is a flow chart of a method of occlusion detection, as shown in FIG. 1, according to an embodiment of the present invention, the method comprising the steps of:
step S101, obtaining the evaporation temperature of an evaporator;
step S102, determining that a throttling device of a unit is in an unblocked state, an all-blocked state or a partial-blocked state according to the evaporation temperature;
step S103, when the throttling device is in a partial blocking state, acquiring the pre-throttling temperature and the post-throttling temperature of the throttling device, and determining the blocking position according to the pre-throttling temperature and the post-throttling temperature.
Through this embodiment, whether the throttling arrangement takes place to block up and pinpoint the position of blocking up can automatic detection, prevent because the throttling arrangement blocks up and does not find in time and the problem that the system heat exchange efficiency who leads to is low, compressor exhaust high temperature. Frequent start and stop of the unit are avoided, and the compressor is damaged.
The invention mainly comprises two stages, wherein the first stage is to determine whether the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature, and the second stage is to execute subsequent corresponding operations aiming at different states. Each of which is described in detail below.
The first stage:
comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result.
In particular, the method comprises the steps of,
if Tz > Tz1, determining that the throttle device is in an unblocked state;
if Tz < Tz2, determining that the throttle device is in a full blocking state;
if Tz2 < Tz1, it is determined that the throttle device is in a partially blocked state.
Based on this, it is possible to realize an automatic and accurate determination of the clogging state of the throttle device.
And a second stage:
if the throttle device is determined to be in an unblocked state, triggering the unit to enter a normal control mode; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
If the throttle device is determined to be in all blocking states, a blocking report is generated and sent to a user; wherein, the blockage report records that the blockage position is positioned on the throttle pipe section. Based on the method, the specific position of the blockage can be reported to the user, and the user can conveniently maintain the blockage.
If it is determined that the throttle device is in the partial-clogging state, a throttle average temperature T is calculated from the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; thereafter, the throttle average temperature T Are all And preset sectionThe flow temperature T0 is compared and the position of the blockage is determined from the result of the comparison.
In particular, the method comprises the steps of,
if T Are all If the flow rate is not less than T0, determining that the blocking position is at the throttling back pipe section;
if T Are all And < T0, determining that the blockage position is in the pre-restriction pipe section.
Based on this, automatic accurate positioning of the blocking position of the throttle device can be achieved. After determining the location of the occlusion, an occlusion report may also be generated and sent to the user; wherein, the jam position is recorded in the jam report. Thereby facilitating the maintenance of the user.
In addition, in order to protect the use safety of the unit, the times of generating the blockage report can be monitored in real time; if the number of times of generating the blockage report exceeds the preset number of times N, the control unit is closed, and a user is prompted to maintain the throttling device. The preset times N can be set and adjusted according to actual requirements.
It should be noted that, the first preset evaporation temperature Tz1 is the evaporation temperature of the evaporator measured by the normal machine set under the standard working condition; the second preset evaporation temperature Tz2 is the measured evaporation temperature of the evaporator after the throttling device is blocked by a normal machine set under the standard working condition. The preset throttling temperature T0 is the average value of the temperature before throttling and the temperature after throttling of the throttling device measured by a normal machine set under the standard working condition. The throttling means in this embodiment may be a throttling capillary.
The present embodiment also provides a computer readable storage medium storing a computer program of signal mapping, which when executed by at least one processor, implements the method described in the present embodiment.
Example two
FIG. 2 is a flow chart of an automatic detection of a blockage by a unit according to an embodiment of the invention, as shown in FIG. 2, the flow including:
1) After the unit is powered on and started, the evaporation temperature of the evaporator is obtained, and the evaporation temperature Tz is compared with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2;
2) If Tz > Tz1, determining that the throttle device is in an unblocked state;
if Tz < Tz2, determining that the throttle device is in a full blocking state;
if Tz2 is less than Tz1, determining that the throttling device is in a partial blocking state;
3) After determining that the throttle device is in an unblocked state, the control unit enters a normal control mode, and the process ends.
4) After the throttle device is determined to be in a partial blocking state, the temperature Tq before the throttle and the temperature Th after the throttle are obtained, and the average temperature T of the throttle is calculated according to the temperature Tq before the throttle Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; thereafter, the throttle average temperature T Are all Comparing the measured value with a preset throttling temperature T0, and determining a blocking position according to a comparison result;
5) If T Are all If the flow rate is not less than T0, determining that the blocking position is at the throttling back pipe section;
if T Are all < T0, determining that the blockage position is in the front throttling pipe section;
6) Monitoring the times of generating a blockage report in real time; if the number of times of generating the blockage report exceeds the preset number of times N, the control unit is closed, and a user is prompted to maintain the throttling device.
Example III
FIG. 3 is a schematic view of a unit structure according to an embodiment of the present invention, as shown in FIG. 3, the unit includes: the device comprises a throttling capillary, an evaporator, a compressor, a condenser and a control valve, wherein the throttling capillary, the evaporator and the compressor are sequentially connected; and the cooling tower is connected with the condenser.
The invention is provided with three temperature sensors, and a first temperature sensor is arranged on a pipeline of an evaporator and used for acquiring the evaporation temperature of the evaporator; the second sensor is arranged on a throttling front pipe section of the throttling device and is used for acquiring the temperature before throttling; and the third sensor is arranged on the throttle back pipe section of the throttle device and is used for acquiring the temperature after throttling.
After the unit is electrified and started, each temperature sensor of the unit detects the temperature value of the position where the temperature sensor is located. Then, the throttle device of the unit can be determined to be in an unblocked state, an all-blocked state or a partial-blocked state according to the evaporation temperature; in the case where the throttle device is in a partially blocked state, the blocking position is determined based on the pre-throttle temperature and the post-throttle temperature.
Through this embodiment, whether the throttling arrangement takes place to block up and pinpoint the position of blocking up can automatic detection, prevent because the throttling arrangement blocks up and does not find in time and the problem that the system heat exchange efficiency who leads to is low, compressor exhaust high temperature. Frequent start and stop of the unit are avoided, and the compressor is damaged.
Example IV
FIG. 4 is a schematic structural view of a unit capable of detecting a blockage according to an embodiment of the present invention, as shown in FIG. 4, the unit including: connected evaporator and throttling device, and,
the blockage detection device is used for determining whether the throttling device is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature of the evaporator; in the case where it is determined that the throttle device is in the partial-clogging state, the clogging position is determined based on the pre-throttle temperature and the post-throttle temperature of the throttle device.
The above-mentioned unit still includes:
the first sensor is arranged on the evaporator and used for acquiring the evaporation temperature of the evaporator;
the second sensor is arranged on a throttling front pipe section of the throttling device and is used for acquiring the temperature before throttling;
and the third sensor is arranged on the throttle back pipe section of the throttle device and is used for acquiring the temperature after throttling.
The three sensors are all temperature sensors and are used for more accurately acquiring the temperature at the corresponding position, so that whether the throttling device is jammed or not and the accurate position of the jam is determined accurately.
The above-described jam detection device may include: the comparison module is used for comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; the state determining module is used for determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result, and is specifically used for: if Tz > Tz1, determining that the throttle device is in an unblocked state; if Tz < Tz2, determining that the throttle device is in a full blocking state; if Tz2 < Tz1, it is determined that the throttle device is in a partially blocked state.
The above-mentioned jam detection device, still include: the control module is used for triggering the unit to enter a conventional control mode under the condition that the throttling device is determined to be in an unblocked state; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
The above-mentioned jam detection device, still include: a calculation module for calculating the average throttle temperature T according to the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; a position determining module for determining the throttle average temperature T Are all Comparing with a preset throttling temperature T0, determining a blocking position according to a comparison result, wherein the method is specifically used for: at T Are all Under the condition that the blocking position is not less than T0, determining that the blocking position is at the throttling back pipe section; at T Are all In the case of < T0, the position of the blockage is determined at the throttle front pipe section.
The above-mentioned jam detection device, still include: the report module is used for generating a blockage report and sending the blockage report to a user after determining the blockage position according to the temperature before throttling and the temperature after throttling; wherein, the blocking position is recorded in the blocking report; the system is also used for generating a blockage report and sending the blockage report to a user under the condition that the throttling device is determined to be in all blockage states; wherein, the blockage report records that the blockage position is positioned on the throttle pipe section. Based on the method, the specific position of the blockage can be reported to the user, and the user can conveniently maintain the blockage.
The above-mentioned jam detection device, still include: the protection module is used for monitoring the times of generating the blocking report; if the times of generating the blockage report exceeds the preset times, the control unit is closed, and a user is prompted to maintain the throttling device. Based on the control method, the unit can be directly controlled to be closed when the blocking condition is serious, so that the damage of the unit is avoided.
It should be noted that, the first preset evaporation temperature Tz1 is the evaporation temperature of the evaporator measured by the normal machine set under the standard working condition; the second preset evaporation temperature Tz2 is the measured evaporation temperature of the evaporator after the throttling device is blocked by a normal machine set under the standard working condition. The preset throttling temperature T0 is the average value of the temperature before throttling and the temperature after throttling of the throttling device measured by a normal machine set under the standard working condition. The throttling means in this embodiment may be a throttling capillary. The throttling means involved in the present embodiment may be a throttling capillary. The unit in this embodiment may be a unit of an apparatus such as an air conditioner.
As is apparent from the above description, compared with the prior art, the present invention can detect whether the throttle device is blocked, and determine whether the throttle device of the unit is blocked by comparing the actual temperature value detected by the temperature sensor set on the throttle device with the preset temperature limit value, thereby preventing the occurrence of conditions of low heat exchange efficiency of the system and high temperature of exhaust gas of the compressor and damage to the compressor caused by the blockage of the throttle pipe.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, 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 process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a mobile terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
While the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are to be construed as falling within the scope of the present invention.
Claims (14)
1. A method of occlusion detection, the method comprising:
acquiring the evaporation temperature of an evaporator;
determining whether a throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature; the method comprises the following steps: comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; determining whether the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the comparison result, wherein the method comprises the following steps of: if Tz > Tz1, determining that the throttle device is in an unblocked state; if Tz < Tz2, determining that the throttle device is in a full blocking state; if Tz2 < Tz1, determining that the throttle device is in a partially blocked state;
under the condition that the throttling device is in a partial blocking state, acquiring the pre-throttling temperature and the post-throttling temperature of the throttling device, and determining a blocking position according to the pre-throttling temperature and the post-throttling temperature; the method comprises the following steps: calculating the average throttle temperature T according to the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all ＝(Tq+Th)/2；Average temperature T of the throttle Are all Comparing the measured value with a preset throttling temperature T0, and determining a blocking position according to a comparison result: if T Are all If the flow rate is not less than T0, determining that the blocking position is at the throttling back pipe section; if T Are all And < T0, determining that the blockage position is in the pre-restriction pipe section.
2. The method of claim 1, wherein after determining that a throttle device of a unit is in an unblocked state, a fully blocked state, or a partially blocked state based on the evaporation temperature, the method further comprises:
triggering the unit to enter a conventional control mode under the condition that the throttling device is in an unblocked state; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
3. The method of claim 1, wherein the step of determining the position of the substrate comprises,
after determining the plugging position based on the pre-throttle temperature and the post-throttle temperature, the method further comprises: generating a blockage report and sending the blockage report to a user; wherein, the blockage position is recorded in the blockage report;
after determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature, the method further comprises: generating a blockage report and sending the blockage report to a user when the throttling device is in all blockage states; wherein, the jam report records that the jam position is located on the throttle pipe section.
4. A method according to claim 3, characterized in that the method further comprises:
monitoring the number of times a blockage report is generated;
if the number of times of generating the blockage report exceeds the preset number of times, the control unit is closed, and a user is prompted to maintain the throttling device.
5. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the first preset evaporation temperature Tz1 is the evaporation temperature of the evaporator measured by a normal machine set under a standard working condition;
the second preset evaporation temperature Tz2 is the measured evaporation temperature of the evaporator after the throttling device is blocked by a normal machine set under the standard working condition.
6. The method of claim 1, wherein the step of determining the position of the substrate comprises,
the preset throttling temperature T0 is an average value of the temperature before throttling and the temperature after throttling of the throttling device, which are measured by a normal machine set under a standard working condition.
7. The method according to any one of claim 1 to 6, wherein,
the throttling device is a throttling capillary.
8. A unit capable of detecting a blockage, the unit comprising: connected evaporator and throttling device, and,
the blockage detection device is used for determining whether the throttling device is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature of the evaporator; determining a blocking position according to a pre-throttling temperature and a post-throttling temperature of the throttling device under the condition that the throttling device is determined to be in a partial blocking state;
the jam detection device further includes: a calculation module for calculating a throttle average temperature T according to the pre-throttle temperature Tq and the post-throttle temperature Th Are all The method comprises the steps of carrying out a first treatment on the surface of the Wherein T is Are all = (tq+th)/2; a position determining module for determining the throttle average temperature T Are all Comparing with a preset throttling temperature T0, and determining the blocking position according to the comparison result, wherein the position determining module is specifically used for determining the blocking position at T Are all Under the condition that the blocking position is not less than T0, determining that the blocking position is at the throttling back pipe section;at T Are all In the case of < T0, determining that the blockage position is in the front throttling pipe section;
the jam detection device further includes: the comparison module is used for comparing the evaporation temperature Tz with a first preset evaporation temperature Tz1 and a second preset evaporation temperature Tz 2; the state determining module is used for determining that the throttling device of the unit is in an unblocked state, an all-blocked state or a partial-blocked state according to the comparison result, and the state determining module is specifically used for determining that the throttling device is in the unblocked state under the condition that Tz is more than Tz 1; determining that the throttle device is in an all-blocked state if Tz < Tz 2; in the case of Tz2 < Tz1, it is determined that the throttle device is in a partially blocked state.
9. The assembly of claim 8, further comprising:
the first sensor is arranged on a pipeline of the evaporator and is used for acquiring the evaporation temperature of the evaporator;
the second sensor is arranged on a throttling front pipe section of the throttling device and is used for acquiring the temperature before throttling;
and the third sensor is arranged on a throttling back pipe section of the throttling device and used for acquiring the temperature after throttling.
10. The assembly of claim 8, wherein the occlusion detection device further comprises:
the control module is used for triggering the unit to enter a conventional control mode under the condition that the throttling device is determined to be in an unblocked state; wherein the normal control mode includes: and acquiring the evaporation temperature of the evaporator at preset intervals, and determining that the throttling device of the unit is in an unblocked state, a full blocked state or a partial blocked state according to the evaporation temperature.
11. The assembly of claim 8, wherein the occlusion detection device further comprises:
the report module is used for generating a blockage report and sending the blockage report to a user after determining the blockage position according to the temperature before throttling and the temperature after throttling; wherein, the blockage position is recorded in the blockage report; the throttle device is also used for generating a blockage report and sending the blockage report to a user under the condition that the throttle device is determined to be in all blockage states; wherein, the jam report records that the jam position is located on the throttle pipe section.
12. The assembly of claim 11, wherein the occlusion detection device further comprises:
the protection module is used for monitoring the times of generating the blocking report; if the number of times of generating the blockage report exceeds the preset number of times, the control unit is closed, and a user is prompted to maintain the throttling device.
13. The assembly according to any one of claims 8 to 12, wherein,
the throttling device is a throttling capillary.
14. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program of signal mapping, which computer program, when being executed by at least one processor, implements the method of any of claims 1-7.
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| CN201811510670.2A CN109737654B (en) | 2018-12-11 | 2018-12-11 | Blocking detection method and unit capable of detecting blocking |
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| CN201811510670.2A CN109737654B (en) | 2018-12-11 | 2018-12-11 | Blocking detection method and unit capable of detecting blocking |
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