Uniform-temperature air duct system, air cooling control method thereof and refrigerating system

Abstract

The invention discloses an air duct system with the uniform temperature, an air cooling control method of the air duct system and a refrigerating system. The air duct system with the uniform temperature comprises a main air supply duct arranged on the upper portion of a temperature changing chamber, an air return duct arranged on the lower portion of the temperature changing chamber and at least one auxiliary air supply duct for supplying air to the air return duct from the main air supply duct. And the pipe diameter of the main air supply duct is reduced along the air path direction of the main air supply duct. Compared with the prior art, by means of the reasonable air duct system, the temperature in the temperature changing chamber is uneven, and the refreshing time of articles is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of refrigeration, and in particular to an air duct system with uniform temperature, an air cooling control method thereof, and a refrigeration system. Background Art

[0002] With the development of society, people's requirements for quality of life are constantly improving. The variable temperature chamber of air-cooled refrigerators, due to its adjustable temperature function, provides users with a more flexible food storage solution. It is loved by more and more consumers and has become an important part of high-end refrigerators. To achieve this function and ensure the best performance, the air duct system plays a vital role. A good air duct system is the key to saving energy, improving the temperature uniformity of the variable temperature chamber, and extending the shelf life of food.

[0003] The existing variable temperature chamber air duct system controls the temperature of the variable temperature chamber by sending air upward and returning air upward, and by creating a constant temperature field without wind sensation. That is, a surrounding cold guide plate is arranged on the top of the variable temperature chamber. The wind blowing in does not come into direct contact with the food, but exchanges heat with the top of the variable temperature chamber to reduce the air temperature of the variable temperature chamber, and finally returns the air through the upper return air vent. This method can reduce the drying of food and achieve the purpose of keeping it fresh.

[0004] However, the disadvantage of this air supply method is that the cold air only contacts the top cooling plate, the temperature difference inside the variable temperature chamber is large, the temperature distribution is uneven, and the top part in contact with the cooling plate cools down faster, affecting the user experience.

[0005] Therefore, how to design a temperature-uniform air duct system and its air cooling control method and refrigeration system to ensure uniform temperature in the variable temperature room is a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0006] In view of the problem in the prior art that the temperature distribution in the variable temperature room is uneven, which affects the user experience, the present invention proposes a temperature-uniform air duct system and its air cooling control method and refrigeration system.

[0007] The technical solution of the present invention is to propose a temperature-uniform air duct system, comprising a main air supply duct arranged at the upper part of the temperature-changing room, a return air duct arranged at the lower part of the temperature-changing room, and at least one auxiliary air supply duct for supplying air from the main air supply duct to the return air duct;

[0008] The diameter of the main air supply duct decreases along the air path direction.

[0009] Furthermore, it also includes a windshield plate matched with the auxiliary air supply duct, and the windshield plate is arranged at the connection between the auxiliary air supply duct and the main air supply duct;

[0010] At least one temperature sensor is arranged on the peripheral side of the temperature changing room, and the opening and closing state of the wind shield is set according to the detection result of the temperature sensor.

[0011] Further, the auxiliary air supply duct includes: a first auxiliary air supply duct, a second auxiliary air supply duct, a third auxiliary air supply duct, and a fourth auxiliary air supply duct;

[0012] The first auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the front end of the air path of the main air supply duct, and a first wind shield is arranged at the connection between the first auxiliary air supply duct and the main air supply duct;

[0013] The second auxiliary air supply duct is arranged at the right part of the temperature-changing room and is located at the front end of the air path of the main air supply duct, and a second wind shield is arranged at the connection between the second auxiliary air supply duct and the main air supply duct;

[0014] The third auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the rear end of the air path of the main air supply duct, and a third wind shield is arranged at the connection between the third auxiliary air supply duct and the main air supply duct;

[0015] The fourth auxiliary air supply duct is arranged at the right part of the temperature changing room and is located at the rear end of the air path of the main air supply duct. A fourth wind shield is arranged at the connection between the fourth auxiliary air supply duct and the main air supply duct.

[0016] Furthermore, the temperature sensor includes: a first temperature sensor arranged on the left side of the variable temperature chamber, a second temperature sensor arranged on the right side of the variable temperature chamber, and a third temperature sensor arranged in the middle of the variable temperature chamber and close to the front end of the air path of the main air supply duct.

[0017] The present invention also proposes an air cooling control method using the above-mentioned air duct system with uniform temperature, which comprises:

[0018] Get the temperature parameters detected by all temperature sensors;

[0019] When the temperature parameters detected by all the temperature sensors reach a threshold temperature, comparing the temperature parameters detected by the temperature sensors;

[0020] The opening and closing states of all wind deflectors are adjusted according to the comparison results.

[0021] Further, adjusting the opening and closing states of all windshields according to the comparison result includes:

[0022] When the temperature parameter detected by the first temperature sensor is the highest, the first wind deflector and the third wind deflector are controlled to be opened, and the second wind deflector and the fourth wind deflector are controlled to be closed.

[0023] Further, adjusting the opening and closing states of all windshields according to the comparison result includes:

[0024] When the temperature parameter detected by the second temperature sensor is the highest, the second wind deflector and the fourth wind deflector are controlled to be opened, and the first wind deflector and the third wind deflector are controlled to be closed.

[0025] Further, adjusting the opening and closing states of all windshields according to the comparison result includes:

[0026] When the temperature parameter detected by the third temperature sensor is the highest, the first wind deflector and the second wind deflector are controlled to be opened, and the third wind deflector and the fourth wind deflector are controlled to be closed.

[0027] Furthermore, it also includes: when a temperature parameter detected by a temperature sensor is higher than the threshold temperature, controlling the wind shield corresponding to the auxiliary air supply duct close to the temperature sensor higher than the threshold temperature to open.

[0028] The present invention also provides a refrigeration system, which has the above-mentioned air duct system with uniform temperature.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] 1. The diameter of the main air supply duct is gradually reduced along the air path direction, which can ensure the same wind speed at each location in the main air supply duct, provide the same air supply volume for the auxiliary air supply duct, and ensure uniform air supply effect;

[0031] 2. The present invention is provided with a plurality of temperature sensors and wind shields, which can adjust the opening and closing states of the auxiliary air supply ducts according to the temperature parameters detected by the temperature sensors, thereby realizing precise air supply control, ensuring the uniformity of temperature distribution in the variable temperature room, and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the overall structure of the air duct system with uniform temperature in the present invention;

[0034] Figure 2 This is an overall flow chart of the air cooling control method proposed by the present invention;

[0035] Among them, 1 is the first wind shield, 2 is the second wind shield, 3 is the third wind shield, and 4 is the fourth wind shield;

[0036] 5 is the air outlet;

[0037] 6 is a first temperature sensor, 7 is a second temperature sensor, and 8 is a third temperature sensor. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0040] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0041] The existing variable temperature chamber air duct system controls the temperature of the variable temperature chamber by sending air upward and returning air upward, and by creating a constant temperature field without wind sensation. That is, a surrounding cold guide plate is arranged on the top of the variable temperature chamber. The wind blowing in does not come into direct contact with the food, but exchanges heat with the top of the variable temperature chamber to reduce the air temperature of the variable temperature chamber, and finally returns the air through the upper return air vent. This method can reduce the drying of food and achieve the purpose of keeping it fresh.

[0042] However, the disadvantage of this air supply method is that the cold air only contacts the top cooling plate, the temperature difference inside the variable temperature chamber is large, the temperature distribution is uneven, and the top part in contact with the cooling plate cools down faster, affecting the user experience.

[0043] Based on the above problems, the present invention proposes a temperature-uniform air duct system, which includes a main air supply duct arranged at the upper part of the temperature-changing room, a return air duct arranged at the lower part of the temperature-changing room, and at least one auxiliary air supply duct for supplying air to the return air duct from the main air supply duct;

[0044] The diameter of the main air supply duct decreases along the direction of the air path.

[0045] See also Figure 1 , the air duct arranged along the air outlet 5 ( Figure 1The main air supply duct is marked with an arrow, and a plurality of auxiliary air supply ducts are connected to the main air supply duct side (respectively arranged at the connection between the first air shield plate 1 and the main air supply duct, at the connection between the second air shield plate 2 and the main air supply duct, at the connection between the third air shield plate 3 and the main air supply duct, and at the connection between the fourth air shield plate 4 and the main air supply duct);

[0046] The diameter of the main air supply duct gradually decreases along the direction of the air path, that is, the direction of the arrow;

[0047] It can be seen from the above scheme that in the present invention, the main air supply duct is arranged at the upper part of the variable temperature chamber, and then the return air duct is arranged at the lower part of the variable temperature chamber, so that when the cold air flows in the duct, it will not only pass through the upper part of the variable temperature chamber, but also pass through the lower part of the variable temperature chamber, thereby realizing uniform cooling of the entire variable temperature chamber;

[0048] From the solutions introduced above, it can be seen that the duct system solutions in the prior art are mostly through upper delivery and upper return, that is, the main supply air duct and the return air duct are both set at the upper part of the variable temperature room. This solution will lead to a large temperature difference in the variable temperature room and uneven temperature distribution. In the solution proposed by the present invention, the duct system is upper delivery and lower return. Therefore, after the present invention adopts the above duct system, it can avoid the problem of uneven temperature distribution in the prior art;

[0049] In addition, the diameter of the main air supply duct in the present invention gradually decreases along its air supply path because auxiliary air supply ducts are sequentially arranged on the air supply path of the main air supply duct, which will divide part of the air volume in the main air supply duct, thereby reducing the air volume in the main air supply duct and reducing the wind speed. Then, when the air supply duct is followed along its air supply path to the auxiliary air supply duct behind, the wind speed decreases, which will cause the air volume divided by the auxiliary air supply duct to decrease, thereby causing the problem of uneven air supply.

[0050] In the present invention, after the duct diameter of the main air supply duct is gradually reduced along its air path, since the reduction in the duct diameter will increase the wind speed, it can compensate for the reduction in wind speed caused by the front auxiliary air supply duct taking away part of the air volume, thereby ensuring that the air volume of each auxiliary air supply duct is uniform.

[0051] Furthermore, the present invention also includes a windshield plate matched with the auxiliary air supply duct, and the windshield plate is arranged at the connection between the auxiliary air supply duct and the main air supply duct;

[0052] At least one temperature sensor is arranged on the peripheral side of the temperature-changing chamber, and the opening and closing state of the wind shield is set according to the detection result of the temperature sensor.

[0053] This part of the present invention is used to further ensure that the temperature distribution of the variable temperature room is uneven. The above-mentioned matching arrangement of the wind shield plate with the auxiliary air supply duct means that a wind shield plate is correspondingly arranged for each auxiliary air supply duct;

[0054] After the temperature sensor is set, the temperature at various locations in the variable temperature room can be detected, thereby detecting the cooling effect in the variable temperature room. For example, in one embodiment of the present invention, three temperature sensors are set, wherein the temperature detected by the first temperature sensor and the second temperature sensor is T1, and the temperature detected by the third temperature sensor is T2, and T2 is greater than T1. In the present invention, it can be determined based on the detection result that the cooling effect at the third temperature sensor is not good and further cooling is required;

[0055] The purpose of setting the wind shield here is to distribute the air volume. For example, in the above embodiment, the temperature at the third temperature sensor is greater than the temperature at the first temperature sensor and the second temperature sensor. At this time, additional cooling is needed for the third temperature sensor. The corresponding auxiliary air supply duct can be opened and closed by the wind shield. The auxiliary air supply duct at the third temperature sensor is opened, and the auxiliary air supply ducts in other places are closed, thereby achieving the effect of additional cooling for the third temperature sensor.

[0056] See also Figure 1 Based on the above design principle, the auxiliary air supply duct in the present invention includes: a first auxiliary air supply duct, a second auxiliary air supply duct, a third auxiliary air supply duct, and a fourth auxiliary air supply duct;

[0057] The first auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the front end of the air path of the main air supply duct. A first wind shield 1 is arranged at the connection between the first auxiliary air supply duct and the main air supply duct.

[0058] The second auxiliary air supply duct is arranged at the right part of the temperature-changing room and is located at the front end of the air path of the main air supply duct. A second wind shield 2 is arranged at the connection between the second auxiliary air supply duct and the main air supply duct.

[0059] The third auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the rear end of the air path of the main air supply duct. A third wind shield 3 is arranged at the connection between the third auxiliary air supply duct and the main air supply duct.

[0060] The fourth auxiliary air supply duct is arranged at the right part of the temperature changing room and is located at the rear end of the wind path of the main air supply duct. A fourth wind shield 4 is arranged at the connection between the fourth auxiliary air supply duct and the main air supply duct.

[0061] The sensors include: a first temperature sensor 6 arranged at the left part of the temperature changing room, a second temperature sensor 7 arranged at the right part of the temperature changing room, and a third temperature sensor 8 arranged at the middle part of the temperature changing room and close to the front end of the air path of the main air supply duct.

[0062] Here, the first temperature sensor 6 is arranged at the left part of the variable temperature room, and the first auxiliary air supply duct and the second auxiliary air supply duct are arranged at the left part thereof. When the temperature is detected to be too high at the first temperature sensor 6 and the refrigeration effect is not good, the first auxiliary air supply duct and the third auxiliary air supply duct can be opened through the first wind shield 1 and the third wind shield 3 to achieve the purpose of cooling the first temperature sensor 6;

[0063] The second temperature sensor 7 is arranged at the right part of the temperature-changing chamber, and the second auxiliary air supply duct and the fourth auxiliary air supply duct are arranged at the right part. When the temperature is detected to be too high at the second temperature sensor 7 and the refrigeration effect is not good, the second auxiliary air supply duct and the fourth auxiliary air supply duct can be opened through the second air shield plate 2 and the fourth air shield plate 4 to achieve the purpose of cooling the second temperature sensor 7;

[0064] The third temperature sensor 8 is arranged at the rear of the variable temperature room, and the first auxiliary air supply duct and the second auxiliary air supply duct are arranged at the rear thereof. When it is detected that the temperature is too high at the third temperature sensor 8 and the cooling effect is poor, the first auxiliary air supply duct and the second auxiliary air supply duct can be opened through the first wind shield 1 and the second wind shield 2 to achieve the purpose of cooling the third temperature sensor 8.

[0065] Based on the above design, the present invention also proposes a method for controlling air cooling of an air duct system with uniform temperature, which includes:

[0066] Get the temperature parameters detected by all temperature sensors;

[0067] When the temperature parameters detected by all temperature sensors reach the threshold temperature, the temperature parameters detected by each temperature sensor are compared;

[0068] The opening and closing states of all wind deflectors are adjusted according to the comparison results.

[0069] All the temperature sensors here are the first temperature sensor 6, the second temperature sensor 7, and the third temperature sensor 8 in the temperature-uniform air duct system mentioned above;

[0070] All windshields are the first windshield 1, the second windshield 2, the third windshield 3, and the fourth windshield 4 in the temperature-uniform air duct system proposed above;

[0071] The design principle of the above air cooling control method is to detect the temperature at various locations in the variable temperature room through a temperature sensor, and then adjust the opening and closing states of the auxiliary air supply ducts according to the different temperatures.

[0072] Based on the above principle, in the air cooling control method of the air duct system with uniform temperature proposed in the present invention, the opening and closing states of all wind shields are adjusted according to the comparison results, including:

[0073] When the temperature parameter detected by the first temperature sensor 6 is the highest, the first wind deflector 1 and the third wind deflector 3 are controlled to be opened, and the second wind deflector 2 and the fourth wind deflector 4 are controlled to be closed;

[0074] Here, when the temperature parameter of the first temperature sensor 6 is detected to be the highest, it may indicate that the temperature distribution in the variable temperature room is uneven. At this time, in order to ensure additional cooling at the first temperature sensor 6, it is necessary to open the first auxiliary air supply duct and the third auxiliary air supply duct, that is, open the corresponding first wind shield 1 and the third wind shield 3. At the same time, it is necessary to close the second auxiliary air supply duct and the fourth auxiliary air supply duct, that is, close the corresponding second wind shield 2 and the fourth wind shield 4.

[0075] Based on the above principle, in the air cooling control method for the air duct system with uniform temperature proposed in the present invention, the opening and closing states of all the wind shields are adjusted according to the comparison results, and further include:

[0076] When the temperature parameter detected by the second temperature sensor 7 is the highest, the second wind deflector 2 and the fourth wind deflector 4 are controlled to be opened, and the first wind deflector 1 and the third wind deflector 3 are controlled to be closed;

[0077] Here, when the temperature parameter of the second temperature sensor 7 is detected to be the highest, it may indicate that the temperature distribution in the variable temperature room is uneven. At this time, in order to ensure additional cooling at the second temperature sensor 7, it is necessary to open the second auxiliary air supply duct and the fourth auxiliary air supply duct, that is, open the corresponding second wind shield 2 and the fourth wind shield 4. At the same time, it is necessary to close the first auxiliary air supply duct and the third auxiliary air supply duct, that is, close the corresponding first wind shield 1 and the third wind shield 3.

[0078] Based on the above principle, in the air cooling control method of the air duct system with uniform temperature proposed in the present invention, the opening and closing states of all wind shields are adjusted according to the comparison results, including:

[0079] When the temperature parameter detected by the third temperature sensor 8 is the highest, the first wind deflector 1 and the second wind deflector 2 are controlled to be opened, and the third wind deflector 3 and the fourth wind deflector 4 are controlled to be closed;

[0080] Here, when the temperature parameter of the third temperature sensor 8 is detected to be the highest, it may indicate that the temperature distribution in the variable temperature room is uneven. At this time, in order to ensure additional cooling at the third temperature sensor 8, it is necessary to open the first auxiliary air supply duct and the second auxiliary air supply duct, that is, open the corresponding first wind shield 1 and the second wind shield 2. At the same time, it is necessary to close the third auxiliary air supply duct and the fourth auxiliary air supply duct, that is, close the corresponding third wind shield 3 and the fourth wind shield 4.

[0081] Based on the above settings, it can be found that the present invention can adjust the opening and closing states of each auxiliary air supply duct according to the temperature parameters detected by the temperature sensor, thereby achieving precise air supply control, ensuring the uniformity of temperature distribution in the variable temperature room, and saving energy consumption.

[0082] Furthermore, in other embodiments of the present invention, the air volume entering the auxiliary air supply duct can also be adjusted by adjusting the opening of the wind shield. For example, when the wind shield completely blocks the air supply port of the main air supply duct to the auxiliary air supply duct, the air volume sent from the main air supply duct to the auxiliary air supply duct is zero.

[0083] When the wind shield only blocks 30% of the air supply opening of the main air supply duct to the auxiliary air supply duct, 70% of the air supply opening of the main air supply duct to the auxiliary air supply duct can still supply air, that is, the air volume of the main air supply duct to the auxiliary air supply duct is 70% of that when it is fully opened;

[0084] Based on the setting of the shielding part of the air supply port by the above-mentioned wind shield plate, the air supply volume of the main air supply duct to the auxiliary air supply duct can be adjusted to achieve the adjustment of the specific air supply volume.

[0085] For example, in a certain embodiment, a first temperature sensor 6, a second temperature sensor 7, and a third temperature sensor 8 are provided. At this time, the temperature detected at the first temperature sensor 6 is 12 degrees Celsius, the temperature detected at the second temperature sensor 7 is 12 degrees Celsius, and the temperature detected at the third temperature sensor 8 is 14 degrees Celsius;

[0086] In the above embodiment, although the temperature at the third temperature sensor 8 is higher than the temperature at the first temperature sensor 6 and the second temperature sensor 7, the temperature difference is not large. If the previous scheme is continued to be adopted, the first wind shield 1 and the second wind shield 2 are opened, and the third wind shield 3 and the fourth wind shield 4 are closed, then the air volume supplied by the main air supply duct will be completely cooled by the first auxiliary air supply duct and the second auxiliary air supply duct for the third temperature sensor 8, which will cause the temperature at the third temperature sensor 8 to drop extremely fast. However, the temperature at the first temperature sensor 6 and the second temperature sensor 7 themselves is not much different from the temperature at the third temperature sensor 8. After adjustment according to the above scheme, the temperature at the third temperature sensor 8 may be much lower than the temperature at the first temperature sensor 6 and the second temperature sensor 7, and the problem of uneven cooling still occurs.

[0087] In this case, the above-mentioned problem can be well solved by adjusting the shielding amount of the four wind shields on the auxiliary air supply duct through the above-mentioned scheme. For example, when the temperature detected at the first temperature sensor 6 is 12 degrees Celsius, the temperature detected at the second temperature sensor 7 is 12 degrees Celsius, and the temperature detected at the third temperature sensor 8 is 14 degrees Celsius, the first wind shield 1 can be fully opened to the air supply port of the first auxiliary air supply duct, the second wind shield 2 can be fully opened to the air supply port of the second auxiliary air supply duct, the third wind shield 3 can be shielded by 20% to the air supply port of the third auxiliary air supply duct, and the fourth wind shield 4 can be shielded by 20% to the air supply port of the fourth auxiliary air supply duct;

[0088] After the above design, the air volume obtained by the first auxiliary air supply duct and the second auxiliary air supply duct from the main air supply duct is 100% of the air supply under normal circumstances, and the air volume obtained by the third auxiliary air supply duct and the fourth auxiliary air supply duct from the main air supply duct is 80% of the air supply under normal circumstances. In this case, the cooling effect at the third temperature sensor 8 is the best, and at the same time, the cooling effect at the first temperature sensor 6 and the second temperature sensor 7 will not be completely shut down. After the above control, it can be well ensured that the temperatures at the first temperature sensor 6, the second temperature sensor 7, and the third temperature sensor 8 are the same, that is, the temperature uniformity at various places in the variable temperature chamber is ensured.

[0089] Furthermore, in the above control method, there is a judgment condition: the temperature parameters detected by all temperature sensors reach the threshold temperature, that is, the above air cooling control method is a default situation where there is no abnormal temperature. In this regard, in the case of abnormal temperature, the air cooling control method of the present invention further includes:

[0090] When a temperature parameter detected by a temperature sensor is higher than a threshold temperature, the wind shield corresponding to the auxiliary air supply duct close to the temperature sensor higher than the threshold temperature is controlled to open.

[0091] The threshold temperature here can be set according to actual needs. For example, if the normal required cooling temperature is 10 degrees Celsius, the threshold temperature can be set at 16 degrees Celsius. If the threshold temperature is higher than 16 degrees Celsius, it indicates that there is an abnormality in the cooling at this time;

[0092] In this case, cooling is performed preferentially here, that is, in the above solution, the wind shield corresponding to the auxiliary air supply duct close to the temperature sensor with a temperature higher than the threshold temperature is controlled to be opened;

[0093] If the temperature detected at the first temperature sensor 6 is abnormal and is higher than the threshold temperature, the first temperature sensor 6 is cooled first, and the first auxiliary air supply duct and the third auxiliary air supply duct near the first temperature sensor 6 are opened, that is, the first wind shield 1 and the third wind shield 3 are opened, and the first temperature sensor 6 is cooled first;

[0094] In addition, if after the above scheme is executed, the temperature at the first temperature sensor 6 is still higher than the threshold temperature, it may indicate that there is an abnormality in the first auxiliary air supply duct or the third auxiliary air supply duct and the air supply effect cannot be achieved. At this time, an alarm is needed to remind the user to repair the first auxiliary air supply duct and the third auxiliary air supply duct, so as to solve the above-mentioned problem of no cooling effect.

[0095] See also Figure 2 , which is an overall flow chart of the air cooling control method proposed in the present invention, taking a refrigerator as an example, comprising the following steps:

[0096] "The refrigerator is powered on and starts to deliver air cooling";

[0097] "Open all wind shields and supply air evenly", in this case, it is assumed that the variable temperature room can be cooled evenly, and all wind shields are opened for even air supply and cooling;

[0098] "Compartment temperature is stable", here it is achieved by opening the wind shield and cooling for a preset time. The reason for setting this step is that when cooling the variable temperature room, the cooling process takes a certain amount of time. If the temperature parameters are detected directly by the temperature sensor, misjudgment may occur due to the failure to achieve the cooling effect;

[0099] "The sensor determines whether the temperature is abnormal." The sensor here is the temperature sensor, which includes three situations:

[0100] “High temperature of the left temperature sensor”, where the left temperature sensor is the first temperature sensor 6, and its high temperature means that the temperature of the first temperature sensor 6 is higher than the temperatures detected by the second temperature sensor 7 and the third temperature sensor 8;

[0101] At this time, the action "open wind shields No. 1 and No. 3, and close wind shields No. 2 and No. 4" is executed. Here, wind shield No. 1 is the first wind shield 1, wind shield No. 2 is the second wind shield 2, wind shield No. 3 is the third wind shield 3, and wind shield No. 4 is the fourth wind shield 4. After opening the first wind shield 1 and the third wind shield 3, additional cooling can be performed at the first temperature sensor 6;

[0102] “High temperature of the right temperature sensor”, where the left temperature sensor is the second temperature sensor 7, and its high temperature means that the temperature of the second temperature sensor 7 is higher than the temperatures detected by the first temperature sensor 6 and the third temperature sensor 8;

[0103] At this time, the action "open wind shields No. 2 and No. 4, close wind shields No. 1 and No. 3" is executed, that is, the second wind shield 2 and the fourth wind shield 4 are opened, and the first wind shield 1 and the third wind shield 3 are closed. Under this setting, additional cooling can be performed at the second temperature sensor 7;

[0104] “High temperature of the rear intermediate temperature sensor”, where the rear intermediate temperature sensor is the third temperature sensor 8, and its high temperature means that the temperature of the third temperature sensor 8 is higher than the temperatures detected by the first temperature sensor 6 and the second temperature sensor 7;

[0105] At this time, the action "open wind shields 1 and 2, and close wind shields 3 and 4" is executed, that is, the first wind shield 1 and the second wind shield 2 are opened, and the third wind shield 3 and the fourth wind shield 4 are closed. Under this setting, additional cooling can be performed at the third temperature sensor 8;

[0106] "When the temperature is detected to be stable, open the remaining wind shields." This means that after the above-mentioned additional cooling action is completed, since the temperature at various locations has become uniform again, all wind shields can continue to be opened to ensure uniform air supply to the entire variable temperature room;

[0107] "Refrigerator operation has ended."

[0108] The above is a schematic diagram of the overall flow of the air cooling control method proposed in the present invention. Based on the above control process and the temperature uniform air duct system proposed above, the present invention has at least the following beneficial effects compared with the design of the prior art:

[0109] 1. The diameter of the main air supply duct is gradually reduced along the air path direction, which can ensure the same wind speed at each location in the main air supply duct, provide the same air supply volume for the auxiliary air supply duct, and ensure uniform air supply effect;

[0110] 2. The present invention is provided with a plurality of temperature sensors and wind shields, which can adjust the opening and closing states of the auxiliary air supply ducts according to the temperature parameters detected by the temperature sensors, thereby realizing precise air supply control, ensuring the uniformity of temperature distribution in the variable temperature room, and saving energy consumption.

[0111] Furthermore, the present invention also proposes a refrigeration system having an air duct system with uniform temperature as described in the full text.

[0112] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A duct system with uniform temperature, characterized in that: It includes a main air supply duct arranged at the upper part of the temperature-changing room, a return air duct arranged at the lower part of the temperature-changing room, and at least one auxiliary air supply duct for supplying air from the main air supply duct to the return air duct; The diameter of the main air supply duct decreases along the air path direction.

2. The air duct system with uniform temperature according to claim 1, characterized in that: It also includes a windshield plate matched with the auxiliary air supply duct, and the windshield plate is arranged at the connection between the auxiliary air supply duct and the main air supply duct; At least one temperature sensor is arranged on the peripheral side of the temperature changing room, and the opening and closing state of the wind shield is set according to the detection result of the temperature sensor.

3. The temperature uniform air duct system according to claim 2, characterized in that: The auxiliary air supply duct includes: a first auxiliary air supply duct, a second auxiliary air supply duct, a third auxiliary air supply duct, and a fourth auxiliary air supply duct; The first auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the front end of the air path of the main air supply duct, and a first wind shield is arranged at the connection between the first auxiliary air supply duct and the main air supply duct; The second auxiliary air supply duct is arranged at the right part of the temperature-changing room and is located at the front end of the air path of the main air supply duct, and a second wind shield is arranged at the connection between the second auxiliary air supply duct and the main air supply duct; The third auxiliary air supply duct is arranged at the left part of the temperature-changing room and is located at the rear end of the air path of the main air supply duct, and a third wind shield is arranged at the connection between the third auxiliary air supply duct and the main air supply duct; The fourth auxiliary air supply duct is arranged at the right part of the temperature changing room and is located at the rear end of the air path of the main air supply duct. A fourth wind shield is arranged at the connection between the fourth auxiliary air supply duct and the main air supply duct.

4. The temperature uniform air duct system according to claim 3, characterized in that: The temperature sensors include: a first temperature sensor disposed on the left side of the temperature changing room, a second temperature sensor disposed on the right side of the temperature changing room, and a third temperature sensor disposed in the middle of the temperature changing room and close to the front end of the air path of the main air supply duct.

5. A method for controlling air cooling using the air duct system with uniform temperature as claimed in any one of claims 1 to 4, characterized in that: include: Get the temperature parameters detected by all temperature sensors; When the temperature parameters detected by all the temperature sensors reach a threshold temperature, comparing the temperature parameters detected by the temperature sensors; The opening and closing states of all wind deflectors are adjusted according to the comparison results.

6. The air cooling control method according to claim 5, characterized in that: The step of adjusting the opening and closing states of all windshields according to the comparison result includes: When the temperature parameter detected by the first temperature sensor is the highest, the first wind deflector and the third wind deflector are controlled to be opened, and the second wind deflector and the fourth wind deflector are controlled to be closed.

7. The air cooling control method according to claim 5, characterized in that: The step of adjusting the opening and closing states of all windshields according to the comparison result includes: When the temperature parameter detected by the second temperature sensor is the highest, the second wind deflector and the fourth wind deflector are controlled to be opened, and the first wind deflector and the third wind deflector are controlled to be closed.

8. The air cooling control method according to claim 5, characterized in that: The step of adjusting the opening and closing states of all windshields according to the comparison result includes: When the temperature parameter detected by the third temperature sensor is the highest, the first wind deflector and the second wind deflector are controlled to be opened, and the third wind deflector and the fourth wind deflector are controlled to be closed.

9. The air cooling control method according to claim 5, characterized in that: Also includes: When a temperature parameter detected by a temperature sensor is higher than the threshold temperature, the wind shield corresponding to the auxiliary air supply duct close to the temperature sensor higher than the threshold temperature is controlled to open.

10. A refrigeration system, characterized in that: The refrigeration system has an air duct system with uniform temperature as described in any one of claims 1 to 4.

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