CN212362550U - Show case with dehumidification effect - Google Patents
Show case with dehumidification effect Download PDFInfo
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- CN212362550U CN212362550U CN202021513354.3U CN202021513354U CN212362550U CN 212362550 U CN212362550 U CN 212362550U CN 202021513354 U CN202021513354 U CN 202021513354U CN 212362550 U CN212362550 U CN 212362550U
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- evaporator
- heat exchange
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- display case
- throttling mechanism
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- 238000007791 dehumidification Methods 0.000 title abstract description 15
- 230000000694 effects Effects 0.000 title abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims description 43
- 239000003507 refrigerant Substances 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 5
- 230000008020 evaporation Effects 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000009833 condensation Methods 0.000 abstract description 4
- 230000005494 condensation Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005057 refrigeration Methods 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Freezers Or Refrigerated Showcases (AREA)
Abstract
The utility model provides a show case with dehumidification effect. The display cabinet comprises a cabinet body, a first evaporator, a second evaporator and a liquid supply pipe, and air flow of the air return inlet sequentially passes through the second evaporator and the first evaporator and then enters the cabinet body. The utility model provides a show case with dehumidification effect, set up two evaporimeters and form the temperature ladder, progressively cool down the return air, guarantee return air temperature's homogeneity, the evaporimeter that is in the downside simultaneously is preferred to carry out the condensation dehumidification to the return air, thereby avoid being in the evaporimeter frosting of upside, the heat exchange efficiency of first evaporimeter has greatly been improved, thereby the refrigeration cycle has been prolonged, reduce the energy consumption, and make the return air abundant, even cooling, the stability of temperature in the cabinet display has been improved, the shelf life of food has been prolonged to a certain extent, the reinforcing storage effect.
Description
Technical Field
The utility model relates to the technical field of article display devices, in particular to a display cabinet with dehumidification effect.
Background
The vertical open-type refrigerated showcase is popular with customers due to the advantages of elegant appearance, refrigeration, fresh-keeping, omnibearing display and display of commodities, convenience for customers to select and the like, and is widely applied to supermarkets and markets in recent years. If the frost layer on the surface of the evaporator is increased to a certain thickness, the heat transfer coefficient on the surface of the evaporator is reduced, the flow resistance of the circulating cold air is increased, the air supply speed is reduced, the circulating air flow is reduced, the performance of the closed opening of the air curtain is reduced, the temperature in the cabinet is increased, the temperature fluctuation of food is aggravated, and the food quality and the storage time are seriously influenced.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem that the heat exchange of the existing showcase is uneven, the food quality and the storage time are affected, the showcase which is used for carrying out secondary gradual temperature reduction on return air and dehumidifying and has a dehumidifying effect is provided.
A display case, comprising:
the lower part of the cabinet body is provided with an air return inlet;
the first evaporator is arranged on the first side surface of the cabinet body;
the second evaporator is arranged on the first side surface and is positioned below the first evaporator;
the inlet of the liquid supply pipe is communicated with a refrigerant circulating pipeline, the first evaporator is communicated with the outlet of the liquid supply pipe through a first throttling mechanism, and the second evaporator is communicated with the outlet of the liquid supply pipe through a second throttling mechanism;
the air flow of the air return opening sequentially passes through the second evaporator and the first evaporator;
the evaporation temperature of the first evaporator is lower than the evaporation temperature of the second evaporator.
The ratio of the specific area of the first evaporator to the specific area of the second evaporator ranges from 4:1 to 1: 1.
The display cabinet also comprises a gas collecting pipe, and the first evaporator and the second evaporator are both communicated with the gas collecting pipe.
The first evaporator is provided with a plurality of first heat exchange branches which are arranged in parallel, and one end of each first heat exchange branch is communicated with the first throttling mechanism.
The showcase further comprises a first flow divider, an inlet of the first flow divider is communicated with the first throttling mechanism, and liquid dividing ports of the first flow divider are respectively communicated with the first heat exchange branch circuits in a one-to-one correspondence mode.
The second evaporator is provided with a plurality of second heat exchange branches which are arranged in parallel, and one end of each second heat exchange branch is communicated with the second throttling mechanism.
The showcase further comprises a second flow divider, an inlet of the second flow divider is communicated with the second throttling mechanism, and liquid dividing ports of the second flow divider are respectively communicated with the second heat exchange branch circuits in a one-to-one correspondence mode.
The display cabinet further comprises a temperature sensor and a humidity sensor, the temperature sensor and the humidity sensor are arranged at the air return opening, and the temperature sensor and the humidity sensor are electrically connected with the second throttling mechanism.
The first evaporator is provided with a hydrophobic coating, and the second evaporator is provided with a hydrophilic coating.
Fins are arranged on the first evaporator and the second evaporator, and the number of the fins on the second evaporator is larger than that of the fins on the first evaporator on the same unit surface area.
The first evaporator is provided with a plurality of first heat exchange branches which are arranged in parallel, one end of each first heat exchange branch is communicated with the first throttling mechanism, the second evaporator is provided with a plurality of second heat exchange branches which are arranged in parallel, one end of each second heat exchange branch is communicated with the second throttling mechanism, and the number of the first heat exchange branches is equal to that of the second heat exchange branches.
The air exhaust port of the compressor is communicated with the inlet of the liquid supply pipe through the condenser, and the air suction port of the compressor is communicated with the first evaporator and the second evaporator through the air collecting pipe.
A control method of the showcase described above, in which the second evaporator is provided with a temperature sensor for detecting a surface temperature of the second evaporator, comprising:
determining the dew point temperature a1 of the return air at the return air inlet;
acquiring the surface temperature a2 of the second evaporator in real time, and comparing a1 with a 2;
when a2 is greater than a1, the opening degree of the second throttle mechanism is decreased;
when a2 is equal to a1, the opening degree of the second throttle mechanism is kept unchanged;
when a2 is smaller than a1, the opening degree of the second throttle mechanism is increased.
The utility model provides a show case with dehumidification effect, set up two evaporimeters and form the temperature ladder, progressively cool down the return air, guarantee return air temperature's homogeneity, the evaporimeter that is in the downside simultaneously is preferred to carry out the condensation dehumidification to the return air, thereby avoid being in the evaporimeter frosting of upside, the heat exchange efficiency of first evaporimeter has greatly been improved, thereby the refrigeration cycle has been prolonged, reduce the energy consumption, and make the return air abundant, even cooling, the stability of temperature in the cabinet display has been improved, the shelf life of food has been prolonged to a certain extent, the reinforcing storage effect.
Drawings
FIG. 1 is a schematic diagram of a prior art display case;
fig. 2 is a side view of a display case according to an embodiment of the display case having a dehumidifying effect provided by the present invention;
fig. 3 is a schematic structural diagram of a display cabinet according to an embodiment of the display cabinet with dehumidification effect provided by the present invention;
fig. 4 is a schematic view of a refrigerant flow direction of the showcase according to the embodiment of the present invention;
in the figure:
1. a first evaporator; 2. a second evaporator; 3. a first throttle mechanism; 4. a second throttling mechanism; 5. a first splitter; 6. a second flow splitter; 11. a first heat exchange branch; 21. and the second heat exchange branch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The showcase shown in fig. 2 to 4 includes: the air return port is arranged at the lower part of the cabinet body, and a plurality of shelves for containing displayed articles are arranged on the cabinet body; the first evaporator 1 is arranged on the first side surface of the cabinet body; the second evaporator 2 is arranged on the first side surface and is positioned below the first evaporator 1; the inlet of the liquid supply pipe is communicated with a refrigerant circulating pipeline, the first evaporator 1 is communicated with the outlet of the liquid supply pipe through a first throttling mechanism 3, the second evaporator 2 is communicated with the outlet of the liquid supply pipe through a second throttling mechanism 4, the liquid supply pipe guides low-temperature refrigerants to the first evaporator 1 and the second evaporator 2, and the amount of the refrigerants entering the first evaporator 1 and the second evaporator 2 is controlled and adjusted according to the opening degrees of the first throttling mechanism 3 and the second throttling mechanism 4, so that the temperature difference of the first evaporator 1 and the second evaporator 2 is realized, a temperature gradient is formed, and the temperature of the gas is gradually reduced twice; the air in the cabinet body enters the areas of the first evaporator 1 and the second evaporator 2 through the air return opening under the action of the fan, wherein the air flow of the air return opening sequentially passes through the second evaporator 2 and the first evaporator 1 to carry out secondary heat exchange and then flows to the position of the shelf again through the air outlet and the air vent, and the food arranged on the shelf is refrigerated and cooled.
Preferably, the showcase includes a heat exchanger, an upper portion of which constitutes the first evaporator 1, and a lower portion of which constitutes the second evaporator 2.
The evaporating temperature of the first evaporator 1 is lower than that of the second evaporator 2, that is, the first evaporator 1 is mainly used for cooling the return air, while the second evaporator 2 mainly aims to perform primary cooling and mainly perform condensation dehumidification, so as to avoid the problem of frost formation at the first evaporator 1, the temperature in the display cabinet is generally required to be 2 ℃ to 10 ℃, the temperature of the first evaporator can be set to be-8 ℃ to-3 ℃, and the temperature of the second evaporator can be set to be 0 ℃ to 5 ℃.
The ratio of the specific area of the first evaporator 1 to the specific area of the second evaporator 2 ranges from 4:1 to 1:1, preferably 2:1, and it can also be said that an integral evaporator is distributed according to a certain ratio to form the first evaporator 1 and the second evaporator 2, where the specific area refers to: the proportion of the occupied area of the first evaporator, namely the projection area of the first evaporator accounts for the proportion of the projection area of the sum of the first evaporator and the second evaporator.
The display cabinet further comprises a gas collecting pipe, the first evaporator 1 and the second evaporator 2 are communicated with the gas collecting pipe, and the refrigerant subjected to heat exchange in the first evaporator 1 and the refrigerant subjected to heat exchange in the second evaporator 2 are collected by the gas collecting pipe and are sent into a refrigerant circulating pipeline for circulation.
The first evaporator 1 is provided with a plurality of first heat exchange branch circuits 11 which are arranged in parallel, one end of each first heat exchange branch circuit 11 is communicated with the first throttling mechanism 3, a multi-inlet and multi-outlet structure is formed, and the heat exchange efficiency of the first evaporator 1 is improved.
The display cabinet further comprises a first flow divider 5, an inlet of the first flow divider 5 is communicated with the first throttling mechanism 3, liquid dividing ports of the first flow divider 5 are communicated with the first heat exchange branch circuits 11 in a one-to-one correspondence mode, the first flow divider 5 is used for dividing the refrigerant passing through the first throttling mechanism 3, the refrigerant quantity in each first heat exchange branch circuit 11 is basically the same, and therefore the return air temperature is uniform.
The second evaporator 2 is provided with a plurality of second heat exchange branch circuits 21 which are arranged in parallel, one end of each second heat exchange branch circuit 21 is communicated with the second throttling mechanism 4, a multi-inlet and multi-outlet structure is formed, and the heat exchange efficiency of the second evaporator 2 is improved.
The display cabinet further comprises a second flow divider 6, an inlet of the second flow divider 6 is communicated with the second throttling mechanism 4, liquid dividing ports of the second flow divider 6 are communicated with the second heat exchange branch circuits 21 in a one-to-one correspondence mode, the second flow divider 6 is used for dividing the refrigerant passing through the second throttling mechanism 4, the refrigerant quantity in each second heat exchange branch circuit 21 is basically the same, and therefore the return air temperature is uniform.
The display cabinet also comprises a temperature sensor and a humidity sensor which are both arranged at the air return inlet, and the temperature sensor and the humidity sensor are both electrically connected with the second throttling mechanism 4, the temperature and humidity of the return air may fluctuate due to environmental and human factors, and in order to improve the dehumidifying efficiency of the second evaporator 2, the second throttle mechanism 4 is adjusted by detecting the temperature and humidity of the air at the air return inlet, thereby adjusting the flow rate of the refrigerant entering the second evaporator 2, and when the temperature or humidity of the return air fluctuates, the flow of the refrigerant flowing into the second evaporator 2 is controlled by adjusting the second throttling mechanism 4, so that the surface temperature of the second evaporator 2 is always within the dew-point temperature range of the return air, and the return air is ensured to be condensed on the second evaporator 2 instead of being frosted.
Be provided with hydrophobic coating on the first evaporimeter 1, be provided with hydrophilic coating on the second evaporimeter 2, hydrophilic coating on the second evaporimeter 2 has increased the area of contact of vapor and 2 surfaces of second evaporimeter in the return air, and the condensation has been changeed on second evaporimeter 2 to vapor, has improved dehumidification efficiency. The hydrophobic coating on the first evaporator 1 greatly reduces the contact area between the water vapor and the surface of the first evaporator 1, so that the water vapor is difficult to condense into frost, even though the return air still contains a small amount of water vapor, the surface of the first evaporator 1 is difficult to frost, and therefore the first evaporator 1 achieves the effect of no frosting, the heat exchange efficiency of the first evaporator 1 is greatly improved, the whole refrigeration cycle of the evaporator is prolonged, and the energy consumption is reduced.
Fins are arranged on the first evaporator 1 and the second evaporator 2, the number of the fins on the second evaporator 2 is larger than that of the fins on the first evaporator 1 on the same unit surface area, namely the fins of the second evaporator 2 are denser than those of the first evaporator 1, so that the heat exchange between the return air and the second evaporator 2 is more sufficient, and the dehumidification efficiency is further improved.
The first evaporator 1 is provided with a plurality of first heat exchange branches 11 which are arranged in parallel, one end of each first heat exchange branch 11 is communicated with the first throttling mechanism 3, the second evaporator 2 is provided with a plurality of second heat exchange branches 21 which are arranged in parallel, one end of each second heat exchange branch 21 is communicated with the second throttling mechanism 4, the number of the first heat exchange branches 11 is equal to that of the second heat exchange branches 21, for example, the first evaporator 1 forms 4 inlets and 4 outlets, the second evaporator 2 also forms 4 inlets and 4 outlets, and the specific number is set according to actual needs.
The air exhaust port of the compressor is communicated with the inlet of the liquid supply pipe through the condenser, the air suction port of the compressor is communicated with the first evaporator 1 and the second evaporator 2 through the air collecting pipe, and the compressor, the condenser and the first evaporator 1 and the second evaporator 2 which are connected in parallel are sequentially connected in series to form a refrigerant heat exchange cycle.
The temperature and humidity of the return air may fluctuate due to environmental and human factors. In order to improve the dehumidification efficiency of the second evaporator, a temperature sensor 1 and a humidity sensor (the relative positions of the temperature sensor and the humidity sensor are not required) may be respectively disposed at the left and right sides of the return air inlet to sense the temperature and the humidity of the return air. The temperature sensor 1 and the humidity sensor are connected with the control system, a calculation program of an enthalpy-humidity diagram is arranged in the control system, namely the temperature sensor 1 and the humidity sensor feed back the temperature and the humidity of the return air sensed by the temperature sensor 1 and the humidity sensor to the control system, and the control system can automatically calculate the corresponding dew point temperature of the return air under the condition. Meanwhile, a temperature sensor is arranged on the second evaporator and used for monitoring the surface temperature of the second evaporator, and the temperature sensor and the second throttling mechanism 4 are connected with the control system.
A control method of the showcase described above, in which the second evaporator is provided with a temperature sensor for detecting a surface temperature of the second evaporator, comprising:
determining the dew point temperature a1 of the return air at the return air inlet;
acquiring the surface temperature a2 of the second evaporator in real time, and comparing a1 with a 2;
when a2 is larger than a1, the opening degree of the second throttling mechanism 4 is reduced, the pressure difference of the heat exchange tubes of the second evaporator 4 is changed, and the surface temperature of the second evaporator 42 is reduced to be within the dew point temperature range;
when a2 is equal to a1, the opening degree of the second throttling mechanism 4 is kept unchanged;
when a2 is smaller than a1, the opening degree of the second throttle mechanism 4 is increased to raise the surface temperature of the second evaporator 2 to within the dew point temperature range.
No matter how the humidity and the temperature of the return air are changed, the surface temperature of the second evaporator can be guaranteed to be always within the dew point temperature range of the return air, the dehumidification efficiency of the second evaporator is guaranteed, the flow of the refrigerant is controlled by properly adjusting the opening degree of the second throttling mechanism 4, so that the surface temperature of the second evaporator is always within the dew point temperature range of the return air, the dehumidification efficiency is improved, and the energy consumption is reduced to a certain degree.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (12)
1. A display case, characterized in that: the method comprises the following steps:
the lower part of the cabinet body is provided with an air return inlet;
the first evaporator (1) is arranged on the first side surface of the cabinet body;
the second evaporator (2) is arranged on the first side face and is positioned below the first evaporator (1);
the inlet of the liquid supply pipe is communicated with a refrigerant circulating pipeline, the first evaporator (1) is communicated with the outlet of the liquid supply pipe through a first throttling mechanism (3), and the second evaporator (2) is communicated with the outlet of the liquid supply pipe through a second throttling mechanism (4);
the air flow of the air return opening sequentially passes through the second evaporator (2) and the first evaporator (1);
the evaporation temperature of the first evaporator (1) is lower than the evaporation temperature of the second evaporator (2).
2. The display case of claim 1, wherein: the ratio of the specific surface area of the first evaporator (1) to the specific surface area of the second evaporator (2) ranges from 4:1 to 1: 1.
3. The display case of claim 1, wherein: the display cabinet also comprises a gas collecting pipe, and the first evaporator (1) and the second evaporator (2) are both communicated with the gas collecting pipe.
4. The display case of claim 1, wherein: the first evaporator (1) is provided with a plurality of first heat exchange branches (11) which are arranged in parallel, and one end of each first heat exchange branch (11) is communicated with the first throttling mechanism (3).
5. The display case of claim 4, wherein: the showcase further comprises a first flow divider (5), an inlet of the first flow divider (5) is communicated with the first throttling mechanism (3), and liquid dividing ports of the first flow divider (5) are respectively communicated with the first heat exchange branch circuits (11) in a one-to-one correspondence mode.
6. The display case of claim 1, wherein: the second evaporator (2) is provided with a plurality of second heat exchange branches (21) which are arranged in parallel, and one end of each second heat exchange branch (21) is communicated with the second throttling mechanism (4).
7. The display case of claim 6, wherein: the display cabinet further comprises a second flow divider (6), an inlet of the second flow divider (6) is communicated with the second throttling mechanism (4), and liquid distributing ports of the second flow divider (6) are respectively communicated with the second heat exchange branch circuits (21) in a one-to-one correspondence mode.
8. The display case of claim 1, wherein: the display cabinet further comprises a temperature sensor and a humidity sensor, the temperature sensor and the humidity sensor are arranged at the air return opening, and the temperature sensor and the humidity sensor are electrically connected with the second throttling mechanism (4).
9. The display case of claim 1, wherein: the first evaporator (1) is provided with a hydrophobic coating, and the second evaporator (2) is provided with a hydrophilic coating.
10. The display case of claim 1, wherein: fins are arranged on the first evaporator (1) and the second evaporator (2), and the number of the fins on the second evaporator (2) is larger than that of the fins on the first evaporator (1) on the same unit surface area.
11. The display case of claim 1, wherein: the first evaporator (1) is provided with a plurality of first heat exchange branches (11) which are arranged in parallel, one end of each first heat exchange branch (11) is communicated with the first throttling mechanism (3), the second evaporator (2) is provided with a plurality of second heat exchange branches (21) which are arranged in parallel, one end of each second heat exchange branch (21) is communicated with the second throttling mechanism (4), and the number of the first heat exchange branches (11) is equal to that of the second heat exchange branches (21).
12. The display case of claim 1, wherein: the air exhaust port of the compressor is communicated with the inlet of the liquid supply pipe through the condenser, and the air suction port of the compressor is communicated with the first evaporator (1) and the second evaporator (2) through the air collecting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021513354.3U CN212362550U (en) | 2020-07-27 | 2020-07-27 | Show case with dehumidification effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021513354.3U CN212362550U (en) | 2020-07-27 | 2020-07-27 | Show case with dehumidification effect |
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| Publication Number | Publication Date |
|---|---|
| CN212362550U true CN212362550U (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021513354.3U Active CN212362550U (en) | 2020-07-27 | 2020-07-27 | Show case with dehumidification effect |
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| Country | Link |
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| CN (1) | CN212362550U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879045A (en) * | 2020-07-27 | 2020-11-03 | 珠海格力电器股份有限公司 | Display cabinet with dehumidification effect and control method |
| WO2023275425A1 (en) * | 2021-07-01 | 2023-01-05 | Frost-Trol, S.A. | Refrigerator unit |
| WO2023275424A1 (en) * | 2021-07-01 | 2023-01-05 | Frost-Trol, S.A. | Refrigerated showcase with cooling system |
-
2020
- 2020-07-27 CN CN202021513354.3U patent/CN212362550U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111879045A (en) * | 2020-07-27 | 2020-11-03 | 珠海格力电器股份有限公司 | Display cabinet with dehumidification effect and control method |
| WO2023275425A1 (en) * | 2021-07-01 | 2023-01-05 | Frost-Trol, S.A. | Refrigerator unit |
| WO2023275424A1 (en) * | 2021-07-01 | 2023-01-05 | Frost-Trol, S.A. | Refrigerated showcase with cooling system |
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