Vehicle-mounted semiconductor refrigerator with auxiliary heat dissipation of air conditioner and control method

Abstract

The invention relates to a vehicle-mounted semiconductor refrigerator with auxiliary heat dissipation of an air conditioner and a control method. The technical problem that an existing semiconductor chilling plate is poor in refrigeration effect is solved. Comprising a refrigerator body with a semiconductor chilling plate, a control module connected with the semiconductor chilling plate is arranged in the refrigerator body, the semiconductor chilling plate is provided with a semiconductor hot face, a refrigerator heat dissipation assembly with a refrigerator inner fan is arranged on one side of the semiconductor hot face, and one end of the refrigerator heat dissipation assembly is connected with one end of an air conditioning system through a refrigerator expansion valve. The refrigerator expansion valve is connected with the control module, and the other end of the refrigerator heat dissipation assembly is connected with one end of the air conditioning system. The refrigerator has the advantages that the heat dissipation effect of the refrigerator radiator on the semiconductor chilling plate can be improved through the air conditioner refrigerant, the flow of the refrigerant passing through the refrigerator radiator can be adjusted according to the temperature in the refrigerator body by controlling the opening degree of the refrigerator expansion valve, and the refrigeration effect of the refrigerator body can be improved in various environments; and independent refrigeration or heating of the refrigerator body through the semiconductor refrigeration sheet is not influenced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicle-mounted refrigerator equipment, and particularly relates to a vehicle-mounted semiconductor refrigerator with air conditioner assisted heat dissipation and a control method. BACKGROUND

[0002] With the wide popularity of electric vehicles, the configuration rate of vehicle-mounted cooling and heating boxes on electric vehicles is also increasing. The existing vehicle-mounted cooling and heating boxes mainly include compressor refrigeration type, absorption refrigeration type and thermoelectric semiconductor type. Among them, the thermoelectric semiconductor cooling and heating box is widely used in the vehicle-mounted field due to its compact structure, small volume, light weight, no mechanical moving parts, low failure rate, fast response and bidirectional switching refrigeration and heating. The heat dissipation system of the mainstream vehicle-mounted thermoelectric semiconductor cooling and heating box generally adopts a traditional heat dissipation fan air heat dissipation structure, which drives air flow by a fan to take away the heat generated by the thermoelectric semiconductor element during refrigeration, so as to maintain the normal working temperature of the element. Due to the high requirement of the semiconductor cooling and heating box on refrigeration and heat dissipation, the existing heat dissipation system has too large operation noise, and the heat dissipation effect is greatly affected by the environment temperature, which affects the refrigeration effect and user experience. SUMMARY

[0003] The purpose of the present application is to provide a vehicle-mounted semiconductor refrigerator with air conditioner assisted heat dissipation.

[0004] To achieve the above purpose, the following technical scheme is adopted: the vehicle-mounted semiconductor refrigerator with air conditioner assisted heat dissipation comprises a refrigerator body with a semiconductor refrigerating sheet, a control module connected with the semiconductor refrigerating sheet is arranged in the refrigerator body, the semiconductor refrigerating sheet has a semiconductor hot surface, a refrigerator heat dissipation assembly with a refrigerator fan is arranged on one side of the semiconductor hot surface, one end of the refrigerator heat dissipation assembly is connected with one end of an air conditioning system through a refrigerator expansion valve, the refrigerator expansion valve is connected with the control module, the other end of the refrigerator heat dissipation assembly is connected with one end of the air conditioning system, a temperature detection module is arranged in the refrigerator body, the temperature inside the refrigerator body can be detected through the temperature detection module, the control module can adjust the power of the refrigerator body according to the temperature change inside the refrigerator body, the refrigeration efficiency of the semiconductor refrigerating sheet can be controlled through the control module, and the opening degree of the refrigerator expansion valve can be controlled, the heat dissipation effect of the refrigerator heat dissipation assembly on the semiconductor refrigerating sheet can be improved through the refrigerator expansion valve connected with the air conditioning system through the air conditioning refrigerant, and the refrigeration effect of the semiconductor refrigerating sheet is ensured.

[0005] In the above-mentioned vehicle-mounted semiconductor refrigerator with air conditioner assisted heat dissipation, the refrigerator heat dissipation assembly comprises a refrigerator radiator in contact with the semiconductor hot surface, and the refrigerator fan is arranged on one side of the refrigerator radiator, the heat of the semiconductor hot surface can be conducted out through the refrigerator radiator, and the heat dissipation efficiency and the refrigeration or heating efficiency inside the refrigerator body can be improved through the refrigerator fan.

[0006] In the above-mentioned vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation, the refrigerator radiator is provided with a refrigerant pipeline, one end of the refrigerant pipeline is connected with the refrigerator expansion valve, and the other end of the refrigerant pipeline is connected with the air conditioner system through a one-way valve. The air conditioner system transmits refrigerant through the refrigerant pipeline, the refrigerant flow can be controlled through the refrigerator expansion valve, and the heat exchange between the refrigerant and the heat of the refrigerator radiator can be realized, so as to improve the heat dissipation effect of the refrigerator radiator, and the one-way valve can prevent the refrigerant from flowing back, thereby ensuring the heat exchange effect.

[0007] In the above-mentioned vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation, the air conditioner system comprises a compressor, the compressor is connected with a condenser, the condenser is connected with an air conditioner evaporator through an air conditioner expansion valve, the air conditioner evaporator is connected with the compressor through a pressure regulating valve, the pressure regulating valve and the one-way valve are connected with the compressor in parallel, and the refrigerator expansion valve and the air conditioner expansion valve are connected with the condenser in parallel. The air conditioner expansion valve can convert the high-pressure refrigerant output by the condenser into low-pressure low-temperature refrigerant, and can control the flow opening degree between the refrigerant and the air conditioner evaporator. The pressure regulating valve can control the refrigerant pressure, thereby prolonging the service life of the compressor.

[0008] A control method of a vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation, the method comprising the following steps: S1, in the refrigeration mode, detecting the running state of the air conditioner system, turning on the refrigerator internal fan, starting the semiconductor refrigeration piece refrigeration, and controlling the opening degree of the refrigerator expansion valve; or in the heating mode, turning on the refrigerator internal fan; the semiconductor refrigeration piece heats up; S2, in the heat preservation mode, the semiconductor refrigeration piece is turned off, the power of the refrigerator internal fan is reduced, the temperature in the refrigerator body is detected, and the refrigerator expansion valve is closed in the refrigeration state.

[0009] In the above-mentioned control method, in step S1, after receiving the refrigeration starting instruction, the refrigerator body detects the running state of the air conditioner. If the air conditioner is working, the refrigerator expansion valve is opened at a fixed opening degree, and the semiconductor refrigeration piece starts refrigeration. The power of the semiconductor refrigeration piece is controlled by adjusting the duty cycle of the bottom edge drive input by the proportional-integral-derivative control algorithm, so as to realize accurate temperature control in the refrigerator body. If the air conditioner is in standby state, the refrigerator sends an instruction to the whole vehicle to open the compressor, waits for the compressor to stabilize, and then opens the refrigerator expansion valve for control.

[0010] In the above-mentioned control method, in step S1, the refrigerator body calculates the superheat degree of the refrigerant at the outlet of the refrigerator body through the pressure and temperature sensors collected at the back end. If the superheat degree is too large or too small, the refrigerator expansion valve is controlled by PID control. The final result is to keep the superheat degree of the refrigerant at the outlet of the refrigerator stable at 4℃-10℃.

[0011] In the above control method, in step S1, after the refrigerator body receives the heating instruction, the semiconductor refrigeration piece starts heating, and the output power of the semiconductor refrigeration piece is controlled through the PID algorithm to realize the heating temperature control of the refrigerator body.

[0012] In the above control method, in step S2, when the refrigerator body is in the heat preservation mode, the inner wall temperature of the refrigerator body reaches the set temperature, and whether the air conditioner is still running is checked. If the air conditioner is in the running state, the refrigerator expansion valve is closed, the refrigerator enters the heat preservation mode; if the air conditioner is in standby state, a compressor shutdown instruction is sent to request the whole vehicle to close the compressor, and then the refrigerator expansion valve is closed, the semiconductor refrigeration piece stops working, and the refrigerator internal fan enters the low-power working mode.

[0013] In the above control method, the refrigerator body is in the refrigeration mode before entering the heat preservation mode, and then enters the refrigeration mode again when the refrigerator body temperature reaches the set temperature plus 5℃; if the refrigerator body is in the heating mode before entering the heat preservation mode, then enters the heating mode when the refrigerator body temperature reaches the set temperature minus 5℃.

[0014] Compared with the prior art, the advantages of the present application are that: 1. The air conditioner refrigerant can improve the heat dissipation effect of the refrigerator radiator on the semiconductor refrigeration piece, and ensure the refrigeration effect of the semiconductor refrigeration piece; 2. By controlling the opening degree of the refrigerator expansion valve, the flow of refrigerant through the refrigerator radiator can be adjusted according to the temperature in the refrigerator body, the refrigeration effect of the refrigerator body can be improved in various environments, and the independent refrigeration or heating of the refrigerator body through the semiconductor refrigeration piece is not affected; 3. The air conditioner refrigerant can improve the refrigeration efficiency while reducing the energy consumption of the refrigerator body to the set temperature. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic diagram of the present application; Figure 2 is a flow chart of the refrigeration mode in the present application; Figure 3 is a flow chart of the heating mode in the present application; Figure 4 is a flow chart of the heat preservation mode in the present application.

[0016] In the figure: semiconductor refrigeration piece 1, semiconductor hot surface 11, refrigerator body 2, refrigerator expansion valve 21, refrigerator heat dissipation assembly 3, refrigerator internal fan 31, refrigerator radiator 32, air conditioning system 4, compressor 41, condenser 42, air conditioning expansion valve 43, air conditioning evaporator 44, pressure regulating valve 45, refrigerant pipeline 5, one-way valve 6. DETAILED DESCRIPTION

[0017] The application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] As shown in the drawings, Figure 1 The vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation includes a refrigerator body 2 with a semiconductor refrigerating sheet 1, a control module connected with the semiconductor refrigerating sheet 1 is arranged in the refrigerator body 2, the semiconductor refrigerating sheet 1 has a semiconductor hot surface 11, a refrigerator heat dissipation assembly 3 with a refrigerator fan 31 is arranged on one side of the semiconductor hot surface 11, one end of the refrigerator heat dissipation assembly 3 is connected with one end of an air conditioner system 4 through a refrigerator expansion valve 21, the refrigerator expansion valve 21 is connected with the control module, the control module includes a fan control module, an expansion valve control module and a semiconductor refrigerating sheet control module, the refrigerator fan 31 can be controlled through the fan control module, and the efficiency of temperature rise and fall in the refrigerator body 1 can be controlled, the opening of the refrigerator expansion valve 21 can be controlled through the expansion valve control module, and heat exchange between the inside of the refrigerator body and the refrigerant can be realized through the semiconductor refrigerating sheet control module, the other end of the refrigerator heat dissipation assembly 3 is connected with one end of the air conditioner system 4, a temperature detection module is arranged in the refrigerator body 2, the temperature in the refrigerator body 2 can be detected through the temperature detection module, and the temperature detection module can adjust the power of the refrigerator body 2 according to the temperature change in the refrigerator body 2 in cooperation with the control module, the refrigeration efficiency of the semiconductor refrigerating sheet 1 can be controlled through the control module, and the opening of the refrigerator expansion valve 21 can be controlled, the heat dissipation effect of the refrigerator heat dissipation assembly 3 on the semiconductor refrigerating sheet 1 can be improved through the refrigerant of the air conditioner through the refrigerator expansion valve 21 connected with the air conditioner system 4, and the refrigeration effect of the semiconductor refrigerating sheet 1 is ensured.

[0019] Specifically, the refrigerator heat dissipation assembly 3 includes a refrigerator radiator 32 in contact with the semiconductor hot surface 11, the refrigerator fan 31 is arranged on one side of the refrigerator radiator 32, the heat of the semiconductor hot surface 11 can be conducted out through the refrigerator radiator 32, and the heat dissipation efficiency can be improved through the refrigerator fan 31, and the refrigeration or heating efficiency in the refrigerator body 1 can be improved.

[0020] The refrigerator radiator 32 is provided with a refrigerant pipeline 5, one end of the refrigerant pipeline 5 is connected with the refrigerator expansion valve 21, the other end of the refrigerant pipeline 5 is connected with the air conditioner system 4 through a one-way valve 6, the air conditioner system 4 transmits refrigerant through the refrigerant pipeline 5, the refrigerant flow can be controlled through the refrigerator expansion valve 21, heat exchange between the refrigerant and the heat of the refrigerator radiator 32 can be realized, the heat dissipation effect of the refrigerator radiator 32 is improved, and the refrigerant backflow is prevented through the one-way valve 6, and the heat exchange effect is ensured.

[0021] As shown in the drawings, Figure 1As shown, the air conditioning system 4 includes a compressor 41, the compressor 41 is connected with a condenser 42, the condenser 42 is connected with an air conditioning evaporator 44 through an air conditioning expansion valve 43, and the air conditioning evaporator 44 is connected with the compressor 41 through a pressure regulating valve 45, and the pressure regulating valve 45 and the one-way valve 6 are arranged in parallel with the compressor 41, the refrigerator expansion valve 21 and the air conditioning expansion valve 43 are arranged in parallel with the condenser 42, the high-pressure refrigerant output by the condenser 42 can be converted into low-pressure low-temperature refrigerant through the air conditioning expansion valve 43, and the flow opening degree between the refrigerant and the air conditioning evaporator 44 can be controlled, and the refrigerant pressure can be controlled through the pressure regulating valve 45, thereby improving the service life of the compressor 41.

[0022] As shown in Figure 2 , Figure 3 , Figure 4 A control method of a vehicle-mounted semiconductor refrigerator assisted by air conditioning, the method comprising the following steps: S1, in refrigeration mode, detecting the running state of the air conditioning system 4, turning on the refrigerator internal fan 31, starting the semiconductor refrigeration piece 1 to refrigerate, and controlling the opening degree of the refrigerator expansion valve 21; or in heating mode, turning on the refrigerator internal fan 31; the semiconductor refrigeration piece 1 heats up; S2, in heat preservation mode, the semiconductor refrigeration piece 1 is turned off, the power of the refrigerator internal fan 31 is reduced, the temperature in the refrigerator body 2 is detected, and the refrigerator expansion valve 21 is closed in refrigeration state.

[0023] In step S1, after receiving the refrigeration start instruction, the refrigerator body 2 detects the running state of the air conditioner, if the air conditioner is working, the refrigerator expansion valve 21 is opened with a fixed opening degree, and the semiconductor refrigeration piece 1 starts to refrigerate; the duty cycle of the bottom edge drive input by the semiconductor refrigeration piece 1 is adjusted by a proportional-integral-derivative control algorithm to control the power of the semiconductor refrigeration piece 1, so as to realize accurate temperature control in the refrigerator body; if the air conditioner is in standby state, the refrigerator sends a command to the whole vehicle to open the compressor 41, waits for the compressor 41 to stabilize, and opens the refrigerator expansion valve 21 for control.

[0024] As shown in Figure 2 , Figure 3 , Figure 4 In step S1, the refrigerator body 2 calculates the superheat degree of the refrigerant at the outlet of the refrigerator body 2 through the pressure and temperature sensors collected at the back end, if the superheat degree is too large or too small, the refrigerator expansion valve 21 is controlled by PID, and the final result is to keep the superheat degree of the refrigerant at the outlet of the refrigerator body 2 stable at 4℃~10℃.

[0025] In step S1, after receiving the heating instruction, the semiconductor refrigeration piece 1 starts to heat, and the output power of the semiconductor refrigeration piece 1 is controlled by a PID algorithm to realize the heating temperature control of the refrigerator body 2.

[0026] Specifically, in step S2, when the refrigerator body 2 is in the heat preservation mode, the temperature of the inner wall of the refrigerator body 2 reaches the set temperature, it is checked whether the air conditioner is still running. If the air conditioner is in the running state, the refrigerator expansion valve 21 is closed, and the refrigerator enters the heat preservation mode. If the air conditioner is in the standby state, a compressor 41 shutdown instruction is sent to request the whole vehicle to close the compressor 41, then the refrigerator expansion valve 21 is closed, the semiconductor refrigeration fin 1 stops working, and the refrigerator internal fan enters the low-power working mode.

[0027] In combination Figure 2 , Figure 3 , Figure 4 As shown in the figure, if the refrigerator body 2 is in the refrigeration mode before entering the heat preservation mode, it will enter the refrigeration mode again after the temperature of the refrigerator body 2 reaches the set temperature plus 5℃. If the refrigerator body 2 is in the heating mode before entering the heat preservation mode, it will enter the heating mode after the temperature of the refrigerator body 2 reaches the set temperature minus 5℃.

[0028] The specific embodiments described herein merely exemplify the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

[0029] Although the terms such as semiconductor refrigeration fin 1, semiconductor hot surface 11, refrigerator body 2, refrigerator expansion valve 21, refrigerator heat dissipation assembly 3, refrigerator internal fan 31, refrigerator radiator 32, air conditioning system 4, compressor 41, condenser 42, air conditioning expansion valve 43, air conditioning evaporator 44, pressure regulating valve 45, refrigerant pipeline 5, one-way valve 6, etc. are used more frequently herein, the possibility of using other terms is not excluded. The use of these terms is only to facilitate the description and explanation of the essence of the present application; any interpretation of them as any kind of additional limitation is contrary to the spirit of the present application.

Claims

1. A vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation, comprising a refrigerator body (2) with a semiconductor refrigerating sheet (1), wherein the refrigerator body (2) is provided with a control module connected with the semiconductor refrigerating sheet (1), the semiconductor refrigerating sheet (1) is provided with a semiconductor hot surface (11), and one side of the semiconductor hot surface (11) is provided with a refrigerator heat dissipation assembly (3) with a refrigerator fan (31), characterized in that, The refrigerator heat dissipation assembly (3) is connected with one end of the air conditioning system (4) through a refrigerator expansion valve (21), the refrigerator expansion valve (21) is connected with a control module, and the other end of the refrigerator heat dissipation assembly (3) is connected with one end of the air conditioning system (4).

2. The vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation according to claim 1, characterized in that, The refrigerator heat dissipation assembly (3) comprises a refrigerator radiator (32) in contact with a semiconductor hot surface (11), and the refrigerator internal fan (31) is arranged on one side of the refrigerator radiator (32).

3. The vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation according to claim 2, characterized in that, The refrigerator radiator (32) is provided with a refrigerant pipeline (5), one end of the refrigerant pipeline (5) is connected with the refrigerator expansion valve (21), and the other end of the refrigerant pipeline (5) is connected with the air conditioning system (4) through a one-way valve (6).

4. The vehicle-mounted semiconductor refrigerator with air conditioner auxiliary heat dissipation according to claim 3, characterized in that, The air conditioning system (4) comprises a compressor (41), the compressor (41) is connected with a condenser (42), the condenser (42) is connected with an air conditioning evaporator (44) through an air conditioning expansion valve (43), the air conditioning evaporator (44) is connected with the compressor (41) through a pressure regulating valve (45), the pressure regulating valve (45) and the one-way valve (6) are connected with the compressor (41) in parallel, and the refrigerator expansion valve (21) and the air conditioning expansion valve (43) are connected with the condenser (42) in parallel.

5. A control method of a vehicle-mounted semiconductor refrigerator using the air conditioner auxiliary heat of any one of claims 1 to 4, characterized by, The method comprises the following steps: In step S1, in the refrigeration mode, the running state of the air conditioning system (4) is detected, the refrigerator internal fan (31) is turned on, the semiconductor refrigeration piece (1) is started to refrigerate, and the opening degree of the refrigerator expansion valve (21) is controlled; or in the heating mode, the refrigerator internal fan (31) is turned on; the semiconductor refrigeration piece (1) is heated. In step S2, in the heat preservation mode, the semiconductor refrigeration piece (1) is turned off, the power of the refrigerator internal fan (31) is reduced, the temperature in the refrigerator body (2) is detected, and the refrigerator expansion valve (21) is turned off in the refrigeration state.

6. The control method according to claim 5, characterized by In step S1, after receiving the refrigeration starting instruction, the refrigerator body (2) detects the running state of the air conditioner, if the air conditioner is working, the refrigerator expansion valve (21) is opened at a fixed opening degree, and the semiconductor refrigeration piece (1) starts to refrigerate; the power of the semiconductor refrigeration piece (1) is controlled by adjusting the duty cycle of the bottom edge drive input of the semiconductor refrigeration piece (1) through a proportional-integral-derivative control algorithm, so that the precise temperature control in the refrigerator body is realized. If the air conditioner is in standby state, the refrigerator sends an instruction to the whole vehicle to request the compressor (41) to be turned on, waits for the compressor (41) to be stable, and then turns on the refrigerator expansion valve (21) for control.

7. The control method according to claim 6, characterized by In step S1, the refrigerator body (2) calculates the superheat degree of the refrigerant at the outlet of the refrigerator body (2) through the pressure and temperature sensors collected by the back end, if the superheat degree is too large or too small, the refrigerator expansion valve (21) is controlled through PID, and finally the superheat degree of the refrigerant at the outlet of the refrigerator body (2) is kept stable at 4-10℃.

8. The control method according to claim 5, characterized by In step S1, after receiving the heating instruction, the semiconductor refrigeration piece (1) starts to heat, and the output power of the semiconductor refrigeration piece (1) is controlled through the PID algorithm, so that the heating temperature control of the refrigerator body (2) is realized.

9. The control method according to claim 5, characterized by In step S2, when the refrigerator body (2) is in the heat preservation mode, the inner wall temperature of the refrigerator body (2) reaches the set temperature, and whether the air conditioner is still running is checked. If the air conditioner is in the running state, the refrigerator expansion valve (21) is closed, and the refrigerator enters the heat preservation mode; If the air conditioner is in standby state, send compressor (41) shutdown instruction, request the whole vehicle to close the compressor (41), then close the refrigerator expansion valve (21), the semiconductor refrigeration piece (1) stops working, and the refrigerator internal fan enters the low power working mode.

10. The control method according to claim 9, characterized by If the refrigerator body (2) is in refrigeration mode before entering heat preservation, the refrigerator body (2) enters refrigeration mode again when the temperature of the refrigerator body (2) reaches the set temperature plus 5℃; if the refrigerator body (2) is in heating mode before entering heat preservation, the refrigerator body (2) enters heating mode when the temperature of the refrigerator body (2) reaches the set temperature minus 5℃.

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