A control method and system for a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling

Abstract

The present invention relates to a control method and system for a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling. It solves the problem in the prior art that the heat dissipation method of the refrigerator heat sink is difficult to dissipate a large amount of heat in a timely and effective manner, affecting the refrigeration effect and even damaging the thermoelectric semiconductor. It includes S1, operation mode judgment; S2, temperature acquisition; S3, temperature difference interval judgment; S4, selection of different control methods according to the temperature difference interval. The advantages of the present invention are: it can significantly improve the refrigeration and heating performance of the vehicle-mounted semiconductor cold and warm box, but does not affect the vehicle-mounted semiconductor cold and warm box to independently realize the refrigeration or heating function, and the use effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted refrigerators and heaters, and in particular to a control method and system for a vehicle-mounted semiconductor refrigerator with air-cooling and heat dissipation assisted by an air conditioner. Background Art

[0002] With the widespread popularity of electric vehicles, the configuration rate of on-board cooling and heating boxes in electric vehicles is getting higher and higher, and among them, thermoelectric semiconductor cooling and heating boxes based on traditional cooling fan air heat dissipation are also widely used in various on-board cooling and heating boxes. However, the thermoelectric semiconductor cooling and heating boxes based on cooling fan air heat dissipation have an obvious disadvantage that they have high requirements for cooling and heat dissipation, and the cooling performance is greatly affected by the ambient temperature; the traditional refrigerator semiconductor cooling chip heat dissipation adopts the heat sink heat dissipation method, that is, the heat sink is directly fixed and fitted with the hot end of the cooling chip. Due to the uneven surface temperature and heat distribution of the radiator, this will reduce the cooling efficiency of the refrigerator semiconductor cooling chip, and at the same time greatly reduce the service life of the automobile refrigerator semiconductor cooling chip; in addition, during the cooling process, the hot end of the thermoelectric semiconductor will generate a lot of heat, and the existing heat dissipation method is difficult to dissipate this heat in a timely and effective manner, affecting the cooling effect and even damaging the thermoelectric semiconductor.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a new heat dissipation component of a semiconductor refrigeration chip for a car refrigerator [CN201110366229.3], which includes a container, a semiconductor refrigeration chip, a first temperature equalizing plate, a second temperature equalizing plate and a heat sink. The new heat dissipation component of the semiconductor refrigeration chip for a car refrigerator of the present invention uses temperature equalizing plates at the hot end and the cold end of the semiconductor refrigeration chip respectively. The temperature equalizing plate at the hot end can quickly diffuse the heat transmitted from the semiconductor refrigeration chip of the refrigerator, so that the heat is evenly diffused and transferred to the surface of the heat sink; the temperature equalizing plate at the cold end increases the contact area between the refrigeration chip and the container to be cooled, so that the temperature distribution on the inner surface of the refrigerator container is more uniform, so that the temperature control is more accurate, and at the same time, the heat exchange amount at the cold end can be increased, which can effectively save energy.

[0004] The above solution has solved to a certain extent the problem in the prior art that the surface temperature and heat distribution of the radiator are uneven, which easily reduces the cooling efficiency of the semiconductor refrigeration chip. However, the solution still has many shortcomings. For example, during the refrigeration process, a large amount of heat is generated at the hot end of the thermoelectric semiconductor. The existing heat dissipation method is difficult to dissipate the heat in a timely and effective manner, affecting the refrigeration effect and even damaging the thermoelectric semiconductor. Summary of the invention

[0005] The object of the present invention is to provide a control method for a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation in order to solve the above problems.

[0006] The purpose of the present invention is to provide a vehicle-mounted semiconductor refrigerator control system with air-conditioning assisted air cooling and heat dissipation in order to solve the above problems.

[0007] To achieve the above object, the present invention adopts the following technical solution: a control method for a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation, the method comprising the following steps:

[0008] S1, operation mode determination;

[0009] S2, temperature collection;

[0010] S3, temperature difference interval judgment;

[0011] S4. Select different control methods according to the temperature difference range.

[0012] In step S1, the operation mode includes:

[0013] ① Refrigeration state is closed;

[0014] ② Refrigeration state is turned on;

[0015] ③Heating state is off;

[0016] ④Heating state is on;

[0017] In step S2, the set target temperature Ts is read in advance, and then the vehicle interior ambient temperature Ta is collected.

[0018] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, the temperature difference interval judgment mainly judges the interval where the difference △T between the target temperature Ts and the vehicle interior ambient temperature Ta is located; that is:

[0019] ①When △T is greater than T1, the operation control mode is 1;

[0020] ②When △T is greater than or equal to T2 and less than or equal to T1, the operation control mode 2 is executed;

[0021] ③When △T is less than T2, the control mode 3 is operated;

[0022] ④When running in heating mode, it runs in control mode 4;

[0023] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, control mode 1 includes the following steps:

[0024] S1-1, the air conditioning auxiliary heat dissipation request is turned on, and the air conditioning cooling state is judged;

[0025] S1-2, if it is in the off state, the refrigerator stops refrigeration and issues a high temperature operation warning;

[0026] S1-3, if it is in the open state, the heat dissipation solenoid valve is opened;

[0027] S1-4, hot end temperature Th determination;

[0028] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, the hot end temperature Th is determined by:

[0029] S1-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the refrigerator stops refrigeration and issues a high temperature operation warning;

[0030] S1-42, if the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

[0031] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, control mode 2 includes the following steps:

[0032] S2-1, judging the cooling status of the air conditioner;

[0033] S2-2, if the air conditioning refrigeration is off, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started and the refrigeration is turned on;

[0034] S2-3, if the air conditioning is in the on state, the heat dissipation solenoid valve is opened;

[0035] S2-4, hot end temperature Th determination;

[0036] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, the hot end temperature Th is determined by:

[0037] S2-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started, and the cooling is turned on;

[0038] S2-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

[0039] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation control method for a vehicle-mounted semiconductor refrigerator, in control mode three, when △T is less than T2, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started, and refrigeration is started.

[0040] In the above-mentioned air-conditioning-assisted air-cooling and heat dissipation vehicle-mounted semiconductor refrigerator control method, control mode 4 includes the following steps:

[0041] S4-1, judging the heating status of the air conditioner;

[0042] S4-2, if it is in the closed state, the heat dissipation solenoid valve is closed, and the hot end heat dissipation fan is turned off, and the heating is turned on;

[0043] S4-3, if it is in the open state, the heat dissipation solenoid valve is opened;

[0044] S4-4, hot end temperature Th determination;

[0045] S4-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, the hot end heat dissipation fan is turned off, and heating is turned on;

[0046] S4-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and heating is started.

[0047] A vehicle-mounted semiconductor refrigerator control system with air-conditioning assisted air cooling and heat dissipation.

[0048] Compared with the prior art, the advantages of the present invention are:

[0049] 1. The air-cooling heat dissipation device that controls the cold air of the air conditioner to be introduced into the vehicle-mounted semiconductor cooling and heating box through the heat dissipation solenoid valve can effectively solve the problem of poor refrigeration performance of the semiconductor cooling and heating box due to insufficient heat dissipation in high temperature environment. In addition, it can also significantly improve the refrigeration performance of the cooling box that relies solely on air heat dissipation at normal ambient temperature.

[0050] 2. The hot air from the air conditioner can also be introduced into the air-cooling heat dissipation device of the vehicle-mounted semiconductor cooling and heating box to improve the heating performance of the semiconductor cooling and heating box.

[0051] 3. By judging the user's air conditioning cooling status and controlling the heat dissipation solenoid valve switch to control the cold air or hot air on the air conditioning ventilation duct to enter the air-cooling heat dissipation device of the vehicle-mounted semiconductor cooling and heating box, the cooling and heating performance of the vehicle-mounted semiconductor cooling and heating box can be significantly improved regardless of the high ambient temperature or normal ambient temperature or low temperature environment, but it does not affect the vehicle-mounted semiconductor cooling and heating box to independently realize the cooling or heating function.

[0052] 4. By introducing cold or hot air from the air conditioner, while improving the cooling or heating performance, the energy consumption of the heating and cooling box in the process of reaching the set temperature can also be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is the overall control flow chart of the present invention;

[0054] Figure 2 It is a control mode 1 flow chart of the present invention;

[0055] Figure 3 It is a flow chart of control mode 2 in the present invention;

[0056] Figure 4 It is the control mode three flow chart of the present invention;

[0057] Figure 5 It is a flow chart of control mode 4 in the present invention;

[0058] In the figure: the sand settling tray body 1, the connecting hole 11, the suction hole 12, the sand guide pipe 2, the annular slurry discharge outer cavity 21, the slag guide pipe 211, the slag guide inner cavity 22, the water receiving hole 23, the water receiving inner hole 231, the water receiving outer hole 232, the sand guide inner tube 24, the slag discharge outer tube 25, the upper switch valve 26, the lower switch valve 27, the layered slag guide structure 3, the sand guide frame 31, the sand filter cavity 32, the partition 33, the filter material net 34, the slag inlet 35, the spiral sand guide assembly 4, the spiral conveying rod 41, the leakage mesh 42, and the one-way permeability filter 43. DETAILED DESCRIPTION

[0059] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0060] like Figure 1-5 As shown, a method for controlling a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation comprises the following steps:

[0061] S1, operation mode determination;

[0062] S2, temperature collection;

[0063] S3, temperature difference interval judgment;

[0064] S4. Select different control methods according to the temperature difference range.

[0065] Initially the refrigerator is in standby mode.

[0066] In step S1, the operation mode includes:

[0067] ① Refrigeration state is closed;

[0068] ② Refrigeration state is turned on;

[0069] ③Heating state is off;

[0070] ④Heating state is on;

[0071] In step S2, the set target temperature Ts is read in advance, and then the vehicle interior ambient temperature Ta is collected.

[0072] Among them, the temperature difference interval judgment mainly judges the interval where the difference △T between the target temperature Ts and the vehicle interior ambient temperature Ta is located; that is:

[0073] ①When △T is greater than T1, the operation control mode is 1;

[0074] ②When △T is greater than or equal to T2 and less than or equal to T1, the operation control mode 2 is executed;

[0075] ③When △T is less than T2, the control mode 3 is operated;

[0076] ④When running in heating mode, it runs in control mode 4;

[0077] Control mode 1 includes the following steps:

[0078] S1-1, the air conditioning auxiliary heat dissipation request is turned on, and the air conditioning cooling state is judged;

[0079] S1-2, if it is in the off state, the refrigerator stops refrigeration and issues a high temperature operation warning;

[0080] S1-3, if it is in the open state, the heat dissipation solenoid valve is opened;

[0081] S1-4, hot end temperature Th determination;

[0082] The heat dissipation solenoid valve here is used to control the on-off of the gas pipeline. As an alternative, valves including but not limited to ball valves, gate valves and solenoid valves can also be used to control the on-off of the air-conditioning ventilation duct; such changes are regarded as alternatives to the heat dissipation electronic valve assembly solution and are all within the scope of protection of this application.

[0083] The hot end temperature Th judgment includes:

[0084] S1-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the refrigerator stops refrigeration and issues a high temperature operation warning;

[0085] S1-42, if the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

[0086] By monitoring the effectiveness of the air conditioner blowing cold or hot air through the hot end temperature, it is possible to avoid the high temperature of the heat dissipation surface in the cooling or heating mode, which may cause the thermoelectric semiconductor refrigeration plate to dry out and damage the thermoelectric semiconductor module. Such changes are within the scope of protection of this application.

[0087] Control mode 2 includes the following steps:

[0088] S2-1, judging the cooling status of the air conditioner;

[0089] S2-2, if the air conditioning refrigeration is off, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started and the refrigeration is turned on;

[0090] S2-3, if the air conditioning is in the on state, the heat dissipation solenoid valve is opened;

[0091] S2-4, hot end temperature Th determination;

[0092] The hot end temperature Th judgment includes:

[0093] S2-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started, and the cooling is turned on;

[0094] S2-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

[0095] In control mode three, when △T is less than T2, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started and cooling is started.

[0096] Control mode 4 includes the following steps:

[0097] S4-1, judging the heating status of the air conditioner;

[0098] S4-2, if it is in the closed state, the heat dissipation solenoid valve is closed, and the hot end heat dissipation fan is turned off, and the heating is turned on;

[0099] S4-3, if it is in the open state, the heat dissipation solenoid valve is opened;

[0100] S4-4, hot end temperature Th determination;

[0101] S4-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, the hot end heat dissipation fan is turned off, and heating is turned on;

[0102] S4-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and heating is started.

[0103] A vehicle-mounted semiconductor refrigerator control system with air-conditioning assisted air cooling and heat dissipation.

[0104] To sum up, the principle of this embodiment is that the refrigerator is initially in standby mode. When the cooling mode is running, the set target temperature Ts is first read, and the vehicle interior ambient temperature Ta is collected to determine the interval where the difference △T between the target temperature Ts and the vehicle interior ambient temperature Ta is located. When △T is greater than T1, control mode one is run; when △T is greater than or equal to T2 and less than or equal to T1, control mode two is run; when △T is less than T2, control mode three is run, and when the heating mode is run, control mode four is run; thereby realizing different control modes according to the refrigerator operation mode and the interval where the difference △T between the target temperature Ts and the vehicle interior ambient temperature Ta is located, that is, by judging the user's air-conditioning status and controlling the heat dissipation solenoid valve switch to control the cold air or hot air on the air-conditioning ventilation duct to enter the air-cooling heat dissipation device of the vehicle-mounted semiconductor cold and heating box, whether it is under high temperature ambient temperature or normal ambient temperature or low temperature environment, the cooling and heating performance of the vehicle-mounted semiconductor cold and heating box can be significantly improved, but it does not affect the independent cooling or heating function of the vehicle-mounted semiconductor cold and heating box.

[0105] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A control method for a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling, characterized in that: The method comprises the following steps: S1, operation mode determination; S2, temperature collection; S3, temperature difference interval judgment; S4. Select different control methods according to the temperature difference range.

2. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling according to claim 1 is characterized in that: In step S1, the operation mode includes: ① Refrigeration state is closed; ② Refrigeration state is turned on; ③Heating state is off; ④Heating state is on; In step S2, the set target temperature Ts is read in advance, and then the vehicle interior ambient temperature Ta is collected.

3. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation according to claim 2 is characterized in that: The temperature difference interval judgment mainly judges the interval where the difference △T between the target temperature Ts and the vehicle interior ambient temperature Ta is located; Right now: ①When △T is greater than T1, the operation control mode is 1; ②When △T is greater than or equal to T2 and less than or equal to T1, the operation control mode 2 is executed; ③When △T is less than T2, the control mode 3 is operated; ④When running in heating mode, it runs in control mode 4.

4. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation according to claim 3 is characterized in that: The control mode 1 comprises the following steps: S1-1, the air conditioning auxiliary heat dissipation request is turned on, and the air conditioning cooling state is judged; S1-2, if it is in the off state, the refrigerator stops refrigeration and issues a high temperature operation warning; S1-3, if it is in the open state, the heat dissipation solenoid valve is opened; S1-4, hot end temperature Th determination.

5. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation according to claim 4 is characterized in that: The hot end temperature Th determination includes: S1-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the refrigerator stops refrigeration and issues a high temperature operation warning; S1-42, if the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

6. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation according to claim 5 is characterized in that: The control mode 2 includes the following steps: S2-1, judging the cooling status of the air conditioner; S2-2, if the air conditioning refrigeration is off, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started and the refrigeration is turned on; S2-3, if the air conditioning is in the on state, the heat dissipation solenoid valve is opened; S2-4, hot end temperature Th determination.

7. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling according to claim 6, characterized in that: The hot end temperature Th determination includes: S2-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started, and the cooling is turned on; S2-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and cooling is started.

8. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling and heat dissipation according to claim 3 is characterized in that: In control mode three, when △T is less than T2, the heat dissipation solenoid valve is closed, but the hot end heat dissipation fan is started and cooling is started.

9. The control method of a vehicle-mounted semiconductor refrigerator with air-conditioning assisted air cooling according to claim 3, characterized in that: The control mode 4 includes the following steps: S4-1, judging the heating status of the air conditioner; S4-2, if it is in the closed state, the heat dissipation solenoid valve is closed, and the hot end heat dissipation fan is turned off, and the heating is turned on; S4-3, if it is in the open state, the heat dissipation solenoid valve is opened; S4-4, hot end temperature Th determination; S4-41, if the hot end temperature Th is higher than the temperature protection value Tprot, the heat dissipation solenoid valve is closed, the hot end heat dissipation fan is turned off, and heating is turned on; S4-42: If the hot end temperature Th is lower than the difference between the temperature protection value Tprot and the hysteresis temperature Thy, the hot end cooling fan is turned off and heating is started.

10. A control system for a vehicle-mounted semiconductor refrigerator control method with air conditioning assisted air cooling and heat dissipation according to any one of claims 1-9.

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