CN211609373U - Heat preservation cabinet - Google Patents
Heat preservation cabinet Download PDFInfo
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- CN211609373U CN211609373U CN201921286377.2U CN201921286377U CN211609373U CN 211609373 U CN211609373 U CN 211609373U CN 201921286377 U CN201921286377 U CN 201921286377U CN 211609373 U CN211609373 U CN 211609373U
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Abstract
The utility model relates to a heat preservation cabinet. The heat preservation cabinet includes the cabinet body, and the internal a plurality of heat preservation check that have arranged of cabinet still are equipped with the fan on the cabinet body, are connected with guide duct and return air duct between heat preservation check and the fan, are connected with heating device between guide duct and the fan, and the internal controller that has still arranged of cabinet and the temperature sensor of arranging in the return air duct have preset the temperature value in the controller, and the controller is used for sending start signal or stop signal to heating device. The air temperature in the return air pipe is used as a signal to control the starting and stopping of the heating device, the air temperature in the return air pipe is lower than the temperature in the heat preservation grid, the temperature in the air guide pipe is higher than the temperature of the heat preservation grid, when the air temperature in the return air pipe reaches a preset stopping temperature, the heating device is turned off, then the fan can continuously blow hot air in the air guide pipe into the heat preservation grid, and the temperature of the heat preservation grid far away from the fan is prevented from being lower than a set temperature.
Description
Technical Field
The utility model relates to a heat preservation cabinet.
Background
When eating in various school dining halls and enterprise dining halls, especially during the lunch peak period, people need spend a large amount of time by ordering through lining up, and people behind the team can not eat hot food, so school dining halls usually can set up food heat preservation cabinet, places partial vegetable in the heat preservation cabinet to in order to provide warm food for the student.
The Chinese utility model patent with the grant bulletin number of CN204654252U and the grant bulletin date of 2015.09.23 discloses a humidifying heat preservation cabinet, which comprises a heat preservation cabinet body, wherein the top of the heat preservation cabinet body is provided with a heating and humidifying device, the side surface of the heat preservation cabinet body is provided with an air guide pipe and a vent, and the vent is communicated with a storage space in the heat preservation cabinet body; the heating and humidifying device comprises a water storage box, a heating pipe and a fan, the top of the heat preservation cabinet body is an inverted U-shaped cavity, air guide pipe inlets and air outlets are formed in the positions, corresponding to the top of the storage space, of the two sides of the U-shaped cavity, and the U-shaped cavity, the air guide pipe inlets, the air guide pipes, the air vents and the air outlets jointly form a circulation channel for hot air and vapor. When the humidifying heat-preservation cabinet is used, water in the water storage box is heated by the heating pipe to form steam, the hot air and the steam flow circularly in the humidifying cabinet along with the rotation of the fan, and food in the humidifying cabinet is kept warm and moisturized.
When the humidifying heat preservation cabinet is used, food in the storage space can be kept warm and moisturized. When carrying hot-air in order to guarantee the temperature in the storing space to the storing space in the heat preservation cabinet, need utilize and detect the temperature in the storing space. In the prior art, a temperature sensor is usually placed in a grid in the middle of the thermal insulation cabinet, the temperature of the grid in the middle of the thermal insulation cabinet detected by the temperature sensor is used as a preset temperature control value, and the heating device is turned on and off by comparing a temperature reading detected by the temperature sensor with the preset temperature control value. However, the temperature of the hot air gradually decreases when the hot air flows along with the circulating air duct, and the temperature of the food in the storage space at the position farther away from the fan is lower than the set temperature, so that the average temperature in all the grids in the thermal insulation cabinet cannot be accurately reflected by taking the temperature of the middle grid as the preset temperature control value, and the temperature of the grid far away from the fan is lower.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a heat preservation cabinet to the heat preservation cabinet who solves among the prior art keeps away from the problem on the low side of the check temperature of fan department through the temperature that detects the middle part check as predetermined temperature control value.
The technical scheme of the utility model is that:
the utility model provides a heat preservation cabinet, includes the cabinet body, has arranged a plurality of heat preservation check that are formed by the baffle partition in the cabinet body, still is equipped with the fan on the cabinet body, be connected with guide duct and return air pipe between heat preservation check and the fan, be connected with heating device between guide duct and the fan, the internal constant temperature system that has still arranged of cabinet, constant temperature system includes the controller and arranges the temperature sensor in the return air pipe, temperature sensor and controller signal connection, temperature sensor is used for sending the temperature signal of the air current in the return air pipe to the controller, the temperature value has been preset in the controller, the controller is used for receiving temperature signal and comparison the size of temperature signal and temperature value, the controller with heating device signal connection is used for to heating device sends start signal or stop signal.
The temperature sensor is arranged at one end of the return air pipe close to the fan.
The temperature values comprise temperature control values, starting temperatures and stopping temperatures of the heat preservation grids, the stopping temperatures are lower than the temperature control values, and the starting temperatures are lower than the stopping temperatures.
The difference value between the starting temperature and the temperature control value is not less than 3 and not more than 5.
The difference between the start temperature and the stop temperature is not greater than 2.
And a heat-insulating layer is arranged on the cabinet body and outside the heat-insulating grids.
The beneficial effects of the utility model are that, utilize temperature sensor to detect the air current temperature in the return duct, start and stop as signal control heating device with the air current temperature in the return duct, and then the temperature in the control heat preservation check, because the air current temperature in the return duct can be less than the temperature in the heat preservation check, and the temperature in the air duct is higher than the temperature of heat preservation check, when the air current temperature in the return duct reaches predetermined stop temperature, heating device is closed the back, the fan can continue to blow in the heat preservation check with the hot-blast in the air duct, can make the temperature of heat preservation check reach the settlement temperature after circulating the certain time, the temperature of the heat preservation check of avoiding keeping away from the fan is less than the settlement temperature.
The utility model also has the advantages that the temperature signal acquired by the temperature sensor in real time is compared with the starting temperature and stopping temperature value preset in the controller, the heating device is controlled to automatically start and stop, and the energy consumption can be reduced; the difference between the temperature control value, the starting temperature and the stopping temperature is small, and the temperature control of the heat preservation grids is more sensitive; the controller automatically adjusts the heating power of the heating device according to the temperature value acquired by the temperature sensor in real time during initial starting, so that the heat preservation efficiency can be improved.
Drawings
Fig. 1 is a schematic perspective view of an embodiment 1 of the thermal insulation cabinet of the present invention;
fig. 2 is a schematic structural view of the thermal insulation cabinet of fig. 1 without a cabinet body.
The system comprises a cabinet body 1, a partition plate 2, a heat preservation grid 3, a fan 4, an air guide pipe 5, an air return pipe 6, a heating device 7 and a controller 8.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
The utility model discloses an embodiment 1 of heat preservation cabinet, as shown in fig. 1 to fig. 2, this heat preservation cabinet includes the cabinet body 1, is provided with vertically and horizontally staggered arrangement's baffle 2 in the cabinet body 1, and baffle 2 separates into a plurality of heat preservation check 3 with the cabinet body 1, and each heat preservation check 3 forms and is used for placing the storing space of treating the heat preservation article. The heat preservation lattices 3 are distributed with multiple layers from top to bottom, each layer is provided with two heat preservation lattices 3, and the heat preservation lattices 3 are two lines arranged from top to bottom. The cabinet body is also provided with a heat insulation layer on the outer side of the heat insulation grid, and the heat insulation layer is a foam layer, so that the heat loss is reduced, and the heat insulation effect is improved; in other embodiments, the insulation layer may also be a resin foam layer.
The heating device 7 comprises a plurality of heating rods made of thermistor materials, and the heating device 7 is used for heating air flow conveyed by the fan 4, so that the air guide pipe 5 conveys hot air to the heat preservation grids 3. The number of the heating rods is three, the three heating rods are arranged in parallel, and the power of each heating rod is 300-500 watts; in other embodiments, the heating rod may be one, two or more. The fans 4, the air guide pipes 5, the air return pipes 6 and the heating devices 7 are divided into two groups, and the two groups correspond to the two rows of heat preservation lattices 3 respectively.
Still arranged constant temperature system on the cabinet body 1, constant temperature system includes controller 8 and arranges the temperature sensor in return air duct 6, and controller 8 is the singlechip of STM32 series, and temperature sensor arranges the one end that is close to fan 4 at return air duct 6 to the temperature of all air currents after heat preservation check 3 of accurate detection. The temperature sensor is used for detecting temperature signals of air flow in the return air duct 6, the controller 8 is in signal connection with the temperature sensor to receive the temperature signals transmitted by the temperature sensor, the three heating rods of the heating device 7 are in signal connection with the controller 8 respectively, the controller 8 controls the three heating rods to work respectively, the two groups of heating devices 7 receive signals of the controller 8 respectively and independently, and the power of the two groups of heating devices 7 can be the same or different.
A temperature value is preset in the controller 8, the temperature value comprises a temperature control value, a starting temperature and a stopping temperature of the heat preservation grid 3, and the temperature control value of the heat preservation grid 3 is an actual temperature which is finally required to be reached by the heat preservation grid 3; the start temperature is a temperature for starting the heating device 7, and the stop temperature is a temperature for stopping the heating device 7. The stop temperature is lower than the temperature control value, the start temperature is lower than the stop temperature, the difference between the start temperature and the temperature control value is not less than 3 and not more than 5, and the difference between the start temperature and the stop temperature is not more than 2. In this example, the temperature control value of the heat-retaining grid 3 was 40 ℃, the start temperature was 36 ℃, and the stop temperature was 36.5 ℃.
When the temperature value measured by the temperature sensor arranged in the return air duct 6 reaches 36.5 ℃, the temperature in the heat preservation grid 3 is 39.5-40.5 ℃, the temperature in the air guide duct 5 is usually a little higher than the temperature control value of 40 ℃ and is about 41-45 ℃, the temperature in the return air duct 6 is a little lower than the temperature control value and is about 36-37 ℃, and the temperature in the heat preservation grid 3 is 39.5-40.5 ℃. The heating rod stops heating, but the fan 4 continues to operate, so that the temperatures of all the heat preservation lattices 3 in the cabinet body 1 are further balanced, when the temperature value acquired by the temperature sensor is reduced to 36 ℃, the heating rod starts heating again, and after a period of time circulation, the temperatures in all the heat preservation lattices 3 are kept constant at 39.5-40.5 ℃.
The working principle of the heat preservation cabinet comprises the following steps that firstly, the fan 4 of the heat preservation cabinet is started, the temperature sensor detects the temperature signal of the airflow in the return air pipe 6, the temperature sensor transmits the temperature signal to the controller 8, the controller 8 compares the temperature signal with the temperature control value of the heat preservation grid 3, the number of heating rods needing to be started is determined, and therefore the power of the heating device 7 is adjusted; step two, the temperature sensor transmits the temperature signal detected in real time to the controller 8, and the controller 8 compares the received temperature signal with a built-in stop signal; step three, when the temperature signal is higher than the stop temperature preset in the controller 8 by 36.5 ℃, the temperature in the heat preservation grid 3 is 39.5-40.5 ℃, the controller 8 transmits a stop signal to the heating device 7 of the heat preservation cabinet according to the comparison result, the heating device 7 stops heating, but the fan 4 continues to operate, so that the overall temperature in the cabinet body 1 is further balanced; when the temperature signal is higher than the preset starting temperature of 36 ℃ in the controller 8 and lower than the stopping temperature of 36.5 ℃, the controller 8 transmits a starting signal to the heating rod, the heating rod starts heating again, and after a period of time circulation, the temperature in all the heat preservation lattices 3 is kept constant at 39.5-40.5 ℃, so that the temperature control values of all the heat preservation lattices 3 in the heat preservation cabinet are achieved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (3)
1. The utility model provides a heat preservation cabinet, its characterized in that, includes the cabinet body, is arranged a plurality of heat preservation check that are formed by the partition board partition in the cabinet body, still is equipped with the fan on the cabinet body, be connected with guide duct and return air pipe between heat preservation check and the fan, be connected with heating device between guide duct and the fan, the internal constant temperature system that still has arranged of cabinet, constant temperature system includes controller and the temperature sensor who arranges in the return air pipe, temperature sensor and controller signal connection, temperature sensor is used for sending the temperature signal of the air current in the return air pipe back to the controller, preset the temperature value in the controller, the controller is used for receiving temperature signal and comparison the size of temperature signal and temperature value, the controller with heating device signal connection is used for to send start signal or stop signal to heating device.
2. A thermal cabinet according to claim 1, wherein the temperature sensor is disposed at an end of the return air duct adjacent the fan.
3. The thermal cabinet according to claim 1 or 2, wherein an insulating layer is arranged on the cabinet body outside the thermal grids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921286377.2U CN211609373U (en) | 2019-08-08 | 2019-08-08 | Heat preservation cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921286377.2U CN211609373U (en) | 2019-08-08 | 2019-08-08 | Heat preservation cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211609373U true CN211609373U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921286377.2U Active CN211609373U (en) | 2019-08-08 | 2019-08-08 | Heat preservation cabinet |
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| Country | Link |
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| CN (1) | CN211609373U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110558866A (en) * | 2019-08-08 | 2019-12-13 | 广州大学华软软件学院 | thermal insulation cabinet and temperature detection method thereof |
-
2019
- 2019-08-08 CN CN201921286377.2U patent/CN211609373U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110558866A (en) * | 2019-08-08 | 2019-12-13 | 广州大学华软软件学院 | thermal insulation cabinet and temperature detection method thereof |
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