Drying fresh-keeping cabinet controller

Abstract

The utility model discloses a drying fresh-keeping cabinet controller, which belongs to the technical field of safe refrigeration and comprises an MCU (Microprogrammed Control Unit), a driving module, a compressor, a refrigeration fan, a heater, a circulating fan and an in-cabinet temperature sensor, the refrigerating fan is arranged at a refrigerating air port of the fresh-keeping cabinet and communicated with the compressor, and the circulating fan is arranged at a circulating air port of the fresh-keeping cabinet and communicated with the outside; the heater and the in-cabinet temperature sensor are arranged in the fresh-keeping cabinet; the output end of the MCU is electrically connected with the compressor, the refrigeration fan, the heater and the circulating fan through the driving module, and the output end of the in-cabinet temperature sensor is electrically connected with the temperature feedback input end T1 of the MCU. The drying and fresh-keeping cabinet controller solves the problem that an existing fresh-keeping cabinet can only refrigerate and cannot dry food.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh-keeping and refrigeration, in particular to a drying and fresh-keeping cabinet controller. Background Art

[0002] In daily life, people mostly use a single low-temperature refrigeration process to preserve food. However, for some foods that need to be dried, they generally need to be dried before refrigeration. Therefore, for a fresh-keeping cabinet that uses a single low-temperature refrigeration process, it is necessary to use other equipment to dry such foods in advance and then put them into the fresh-keeping cabinet for refrigeration, which makes the operation complicated. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a drying and fresh-keeping cabinet controller to solve the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solution: a drying and fresh-keeping cabinet controller, including an MCU, a drive module, a compressor, a refrigeration fan, a heater, a circulation fan and a temperature sensor in the cabinet;

[0005] The refrigeration fan is arranged at the refrigeration air outlet of the fresh-keeping cabinet and is connected to the compressor, and the circulation fan is arranged at the circulation air outlet of the fresh-keeping cabinet and is connected to the outside; the heater and the cabinet temperature sensor are both arranged in the fresh-keeping cabinet;

[0006] The output end of the MCU is electrically connected to the compressor, the refrigeration fan, the heater and the circulation fan through the driving module, and the output end of the temperature sensor in the cabinet is electrically connected to the temperature feedback input end T1 of the MCU.

[0007] Preferably, the driving module includes a composite transistor array IC3, a relay KJ3, a relay KJ4 and a relay KJ5;

[0008] The input terminal D5 of the composite transistor array IC3 is electrically connected to the compressor drive output terminal OUT3 of the MCU, the input terminal Q5 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ3, the other end of the iron core of the relay KJ3 is electrically connected to the power supply, and the compressor is electrically connected to the live wire through the normally open contact of the relay KJ3;

[0009] The input terminal D4 of the composite transistor array IC3 is electrically connected to the cooling fan drive output terminal OUT4 of the MCU, the input terminal Q4 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ4, the other end of the iron core of the relay KJ4 is electrically connected to the power supply, and the cooling fan is electrically connected to the live wire through the normally open contact of the relay KJ4;

[0010] The input terminal D3 of the composite transistor array IC3 is electrically connected to the circulating fan drive output terminal OUT5 of the MCU, the input terminal Q3 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ5, the other end of the iron core of the relay KJ5 is electrically connected to the power supply, and the circulating fan is electrically connected to the live wire through the normally open contact of the relay KJ5.

[0011] Optionally, the driving module further includes a photocoupler IC11 and a thyristor IC31;

[0012] The input terminal D1 of the composite transistor array IC3 is electrically connected to the heater drive output terminal OUT7 of the MCU, the output terminal Q1 of the composite transistor array IC3 is electrically connected to one end of the input side of the photoelectric coupler IC11, the other end of the input side of the photoelectric coupler IC11 is electrically connected to the power supply, one end of the output side of the photoelectric coupler IC11 is electrically connected to the live wire, the other end of the output side of the photoelectric coupler IC11 is electrically connected to the control end of the thyristor IC31, one end of the thyristor IC31 is electrically connected to the live wire, and the other end of the thyristor IC31 is electrically connected to the heater.

[0013] It is worth noting that one end of the cabinet temperature sensor is grounded, and the other end of the cabinet temperature sensor is electrically connected to the first end of the resistor R41 and the first end of the resistor R71 respectively, the second end of the resistor R41 is electrically connected to the temperature feedback input terminal T1 of the MCU, and the second end of the resistor R71 is electrically connected to the power supply.

[0014] Specifically, it also includes a defrost temperature sensor, which is arranged in the refrigeration pipe of the compressor. One end of the defrost temperature sensor is grounded, and the other end of the defrost temperature sensor is electrically connected to the first end of the resistor R43 and the first end of the resistor R73 respectively. The second end of the resistor R43 is electrically connected to the temperature feedback input terminal T2 of the MCU, and the second end of the resistor R73 is electrically connected to the power supply.

[0015] Optionally, a humidifier is further included, and the humidifier is arranged in the fresh-keeping cabinet;

[0016] The driving module also includes a relay KJ2, the input end D6 of the composite transistor array IC3 is electrically connected to the humidifier drive output end OUT2 of the MCU, the output end Q6 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ2, the other end of the iron core of the relay KJ2 is electrically connected to the power supply, and the humidifier is electrically connected to the live wire through the normally open contact of the relay KJ2.

[0017] The beneficial effect of the present utility model is that, in the drying and fresh-keeping cabinet controller, a heater and a circulating fan are provided to cooperate with the compressor and the refrigeration fan. The compressor and the refrigeration fan start working first. When the temperature sensor inside the cabinet detects that the temperature inside the cabinet is less than or equal to the refrigeration and drying control temperature, the heater is started and the circulating fan is operated to heat and air dry. When the temperature sensor inside the cabinet detects that the temperature inside the cabinet is greater than or equal to the upper limit value, or when the compressor stops, the heater and the circulating fan are disconnected. This cycle is repeated to achieve the purpose of drying. After drying is completed, the compressor and the refrigeration fan can enter the normal refrigeration mode. In this way, drying and refrigeration can be achieved through a single device, simplifying the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a system block diagram of a drying and fresh-keeping cabinet controller in one embodiment of the present invention;

[0019] Figure 2 This is a peripheral circuit diagram of an MCU in one embodiment of the present utility model;

[0020] Figure 3 This is a circuit diagram of a driving module in one embodiment of the present utility model;

[0021] Figure 4 This is a circuit diagram corresponding to the temperature sensor in the cabinet in one embodiment of the present utility model;

[0022] Figure 5 This is a circuit diagram corresponding to a defrost temperature sensor in one embodiment of the present utility model;

[0023] Figure 6 This is a circuit diagram corresponding to a humidity sensor in one embodiment of the present utility model;

[0024] Figure 7 A circuit diagram of a power supply in one embodiment of the present invention;

[0025] Figure 8 FIG. 1 is a circuit diagram of a touch and display module in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0027] like Figure 1-8As shown, a drying and fresh-keeping cabinet controller includes an MCU, a drive module, a compressor, a cooling fan, a heater, a circulating fan, and a temperature sensor inside the cabinet;

[0028] The refrigeration fan is arranged at the refrigeration air outlet of the fresh-keeping cabinet and is connected to the compressor, and the circulation fan is arranged at the circulation air outlet of the fresh-keeping cabinet and is connected to the outside; the heater and the cabinet temperature sensor are both arranged in the fresh-keeping cabinet;

[0029] The output end of the MCU is electrically connected to the compressor, the refrigeration fan, the heater and the circulation fan through the driving module, and the output end of the temperature sensor in the cabinet is electrically connected to the temperature feedback input end T1 of the MCU.

[0030] In the drying and fresh-keeping cabinet controller, a heater and circulating fan are configured to work in conjunction with the compressor and refrigeration fan. The compressor and refrigeration fan start working first. When the cabinet temperature sensor detects that the cabinet temperature is less than or equal to the refrigeration and drying control temperature (default 10°C), the heater is activated and the circulating fan is operated to heat and air dry. When the cabinet temperature sensor detects that the cabinet temperature is greater than or equal to the upper limit (default refrigeration and drying control temperature + 5°C hysteresis of the cooling mode temperature), or when the compressor stops, the heater and circulating fan are disconnected. This cycle continues to achieve the purpose of drying. After drying is complete, the compressor and refrigeration fan can enter normal refrigeration mode. In this way, drying and refrigeration can be achieved through a single device, simplifying operation.

[0031] This solution also has a defrost mode. When the defrost mode is started, if the temperature sensor inside the cabinet detects that the temperature inside the cabinet is less than or equal to the defrost control temperature (default 15°C), the compressor will be stopped and then the heater will be turned on, and the circulating fan will run at the same time. When the cabinet temperature is greater than or equal to the upper limit value (default defrost control temperature + defrost mode temperature hysteresis 3°C), the heater will be disconnected and the compressor will be started again.

[0032] It is worth noting that if Figure 3 As shown, the driving module includes a composite transistor array IC3, a relay KJ3, a relay KJ4 and a relay KJ5;

[0033] The input terminal D5 of the composite transistor array IC3 is electrically connected to the compressor drive output terminal OUT3 of the MCU. The input terminal Q5 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ3. The other end of the iron core of the relay KJ3 is electrically connected to the power supply. The compressor is electrically connected to the live wire through the normally open contact of the relay KJ3. When the compressor drive output terminal OUT3 of the MCU transmits a high-level signal to the input terminal D5 of the composite transistor array IC3, the input terminal Q5 of the composite transistor array IC3 is grounded, thereby grounding one end of the iron core of the relay KJ3. The iron core of the relay KJ3 is energized and attracted, and its normally open contact is closed, and the compressor is powered and operated.

[0034] The input terminal D4 of the composite transistor array IC3 is electrically connected to the cooling fan drive output terminal OUT4 of the MCU, the input terminal Q4 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ4, the other end of the iron core of the relay KJ4 is electrically connected to the power supply, and the cooling fan is electrically connected to the live wire through the normally open contact of the relay KJ4; when the cooling fan drive output terminal OUT4 of the MCU transmits a high-level signal to the input terminal D4 of the composite transistor array IC3, the input terminal Q4 of the composite transistor array IC3 is grounded, thereby grounding one end of the iron core of the relay KJ4, the iron core of the relay KJ4 is energized and attracted, its normally open contact is closed, and the cooling fan is energized and operated;

[0035] Input terminal D3 of the composite transistor array IC3 is electrically connected to output terminal OUT5 of the MCU for driving the circulating fan. Input terminal Q3 of the composite transistor array IC3 is electrically connected to one end of the core of relay KJ5. The other end of the core of relay KJ5 is electrically connected to a power supply. The circulating fan is electrically connected to the live wire via the normally open contact of relay KJ5. When the circulating fan drive output terminal OUT5 of the MCU transmits a high-level signal to input terminal D3 of the composite transistor array IC3, input terminal Q3 of the composite transistor array IC3 is grounded, thereby grounding one end of the core of relay KJ5. The core of relay KJ5 is energized, closing its normally open contact and energizing the circulating fan.

[0036] Optionally, the driving module also includes a photocoupler IC11 and a thyristor IC31; the input end D1 of the composite transistor array IC3 is electrically connected to the heater drive output end OUT7 of the MCU, the output end Q1 of the composite transistor array IC3 is electrically connected to one end of the input side of the photocoupler IC11, the other end of the input side of the photocoupler IC11 is electrically connected to the power supply, one end of the output side of the photocoupler IC11 is electrically connected to the live wire, the other end of the output side of the photocoupler IC11 is electrically connected to the control end of the thyristor IC31, one end of the thyristor IC31 is electrically connected to the live wire, and the other end of the thyristor IC31 is electrically connected to the heater. When the heater drive output terminal OUT7 of the MCU transmits a high-level signal to the input terminal D1 of the composite transistor array IC3, the output terminal Q1 of the composite transistor array IC3 is grounded, and the input side of the photocoupler IC11 is energized, thereby turning on the output side of the photocoupler IC11, thereby energizing the control terminal of the thyristor IC31, thereby turning on the thyristor IC31 and energizing the heater.

[0037] It also includes a defogger, and the driving module also includes a photocoupler IC12 and a thyristor IC32; the input end D2 of the composite transistor array IC3 is electrically connected to the heater drive output end OUT6 of the MCU, the output end Q2 of the composite transistor array IC3 is electrically connected to one end of the input and output side of the photocoupler IC12, the other end of the input side of the photocoupler IC12 is electrically connected to the power supply, one end of the output side of the photocoupler IC12 is electrically connected to the live wire, the other end of the output side of the photocoupler IC12 is electrically connected to the control end of the thyristor IC32, one end of the thyristor IC32 is electrically connected to the live wire, and the other end of the thyristor IC32 is electrically connected to the defogger. When the heater drive output terminal OUT6 of the MCU transmits a high-level signal to the input terminal D2 of the composite transistor array IC3, the output terminal Q2 of the composite transistor array IC3 is grounded, and the input side of the photocoupler IC12 is energized, thereby turning on the output side of the photocoupler IC12, thereby energizing the control terminal of the thyristor IC32, thereby turning on the thyristor IC32 and energizing the defogger.

[0038] Preferably, Figure 4 As shown, one end of the cabinet temperature sensor is grounded, and the other end is electrically connected to the first end of resistor R41 and the first end of resistor R71, respectively. The second end of resistor R41 is electrically connected to the temperature feedback input terminal T1 of the MCU, and the second end of resistor R71 is electrically connected to the power supply. In this way, when the temperature inside the cabinet changes, the resistance of the cabinet temperature sensor changes, thereby changing the voltage input to the temperature feedback input terminal T1 of the MCU, thereby achieving temperature acquisition.

[0039] Specifically, if Figure 5 As shown, it also includes a defrost temperature sensor, which is arranged in the refrigeration pipe of the compressor, one end of the defrost temperature sensor is grounded, and the other end of the defrost temperature sensor is electrically connected to the first end of the resistor R43 and the first end of the resistor R73 respectively, the second end of the resistor R43 is electrically connected to the temperature feedback input terminal T2 of the MCU, and the second end of the resistor R73 is electrically connected to the power supply. In this way, when the temperature in the refrigeration pipe of the compressor changes, the resistance of the defrost temperature sensor will change, thereby changing the voltage input to the temperature feedback input terminal T2 of the MCU, thereby realizing temperature acquisition. When the defrost temperature sensor detects that the temperature in the refrigeration pipe of the compressor is lower than the set threshold, the compressor stops to defrost, or after the compressor stops, the heater and the circulating fan are started to defrost until the defrost temperature sensor detects that the temperature in the refrigeration pipe of the compressor is higher than the set threshold.

[0040] It is worth noting that it also includes a humidifier and a humidity sensor, both of which are arranged in the fresh-keeping cabinet; the driving module also includes a relay KJ2, the input end D6 of the composite transistor array IC3 is electrically connected to the humidifier drive output end OUT2 of the MCU, the output end Q6 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ2, the other end of the iron core of the relay KJ2 is electrically connected to the power supply, and the humidifier is electrically connected to the live wire through the normally open contact of the relay KJ2.

[0041] like Figure 6 As shown, the humidity sensor is electrically connected to the MCU's humidity SDA and SCK ports via the I2C communication protocol. When the humidity inside the cabinet, as measured by the humidity sensor, falls below a set threshold, the MCU activates a humidifier to increase the humidity inside the cabinet. In this solution, humidity regulation is achieved by intermittently turning the humidifier on and off. By controlling temperature and humidity, this solution effectively preserves the freshness of foods such as meat, vegetables, and fruits.

[0042] like Figure 7As shown, the power supply includes a transformer T, a rectifier bridge and a power regulator IC2. The mains is electrically connected to the primary side of the transformer T. The secondary side of the transformer T has two output terminals, which are respectively connected to the rectifier bridge, thereby forming a 15V voltage output terminal and a 12V voltage output terminal, respectively. The 12V voltage output terminal is also electrically connected to the input terminal of the power regulator IC2, forming a 5V voltage output at the output terminal of the power regulator IC2; wherein the 15V voltage output terminal is electrically connected to the other end of the iron core of each relay, and the 5V voltage output is respectively connected to the power input terminal of the MCU, the input side of each optocoupler, the second end of the resistor R71 and the second end of the resistor R73.

[0043] like Figure 8 As shown, it also includes a touch and display module, which includes touch buttons, a touch driver chip IC30, a digital tube, a digital tube driver chip IC10 and a single-chip microcomputer IC20. The touch driver chip IC30 and the digital tube driver chip IC10 realize serial communication with the MCU through the single-chip microcomputer IC20. The touch buttons are electrically connected to the touch driver chip IC30 to realize key input, and the digital tube is electrically connected to the digital tube driver chip IC10 to realize display.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A drying and fresh-keeping cabinet controller, characterized by: Including MCU, drive module, compressor, cooling fan, heater, circulation fan and cabinet temperature sensor; The refrigeration fan is arranged at the refrigeration air outlet of the fresh-keeping cabinet and is connected to the compressor, and the circulation fan is arranged at the circulation air outlet of the fresh-keeping cabinet and is connected to the outside; the heater and the cabinet temperature sensor are both arranged in the fresh-keeping cabinet; The output end of the MCU is electrically connected to the compressor, the refrigeration fan, the heater and the circulation fan through the driving module, and the output end of the temperature sensor in the cabinet is electrically connected to the temperature feedback input end T1 of the MCU.

2. A drying and fresh-keeping cabinet controller according to claim 1, characterized in that: The driving module includes a composite transistor array IC3, a relay KJ3, a relay KJ4 and a relay KJ5; The input terminal D5 of the composite transistor array IC3 is electrically connected to the compressor drive output terminal OUT3 of the MCU, the input terminal Q5 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ3, the other end of the iron core of the relay KJ3 is electrically connected to the power supply, and the compressor is electrically connected to the live wire through the normally open contact of the relay KJ3; The input terminal D4 of the composite transistor array IC3 is electrically connected to the cooling fan drive output terminal OUT4 of the MCU, the input terminal Q4 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ4, the other end of the iron core of the relay KJ4 is electrically connected to the power supply, and the cooling fan is electrically connected to the live wire through the normally open contact of the relay KJ4; The input terminal D3 of the composite transistor array IC3 is electrically connected to the circulating fan drive output terminal OUT5 of the MCU, the input terminal Q3 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ5, the other end of the iron core of the relay KJ5 is electrically connected to the power supply, and the circulating fan is electrically connected to the live wire through the normally open contact of the relay KJ5.

3. A drying and fresh-keeping cabinet controller according to claim 2, characterized in that: The driving module also includes a photocoupler IC11 and a thyristor IC31; The input terminal D1 of the composite transistor array IC3 is electrically connected to the heater drive output terminal OUT7 of the MCU, the output terminal Q1 of the composite transistor array IC3 is electrically connected to one end of the input side of the photoelectric coupler IC11, the other end of the input side of the photoelectric coupler IC11 is electrically connected to the power supply, one end of the output side of the photoelectric coupler IC11 is electrically connected to the live wire, the other end of the output side of the photoelectric coupler IC11 is electrically connected to the control end of the thyristor IC31, one end of the thyristor IC31 is electrically connected to the live wire, and the other end of the thyristor IC31 is electrically connected to the heater.

4. A drying and fresh-keeping cabinet controller according to claim 1, characterized in that: One end of the cabinet temperature sensor is grounded, and the other end of the cabinet temperature sensor is electrically connected to the first end of the resistor R41 and the first end of the resistor R71 respectively. The second end of the resistor R41 is electrically connected to the temperature feedback input terminal T1 of the MCU, and the second end of the resistor R71 is electrically connected to the power supply.

5. A drying and fresh-keeping cabinet controller according to claim 1, characterized in that: It also includes a defrost temperature sensor, which is arranged in the refrigeration pipe of the compressor. One end of the defrost temperature sensor is grounded, and the other end of the defrost temperature sensor is electrically connected to the first end of the resistor R43 and the first end of the resistor R73 respectively. The second end of the resistor R43 is electrically connected to the temperature feedback input terminal T2 of the MCU, and the second end of the resistor R73 is electrically connected to the power supply.

6. A drying and fresh-keeping cabinet controller according to claim 2, characterized in that: It also includes a humidifier, which is arranged in the fresh-keeping cabinet; The driving module also includes a relay KJ2, the input end D6 of the composite transistor array IC3 is electrically connected to the humidifier drive output end OUT2 of the MCU, the output end Q6 of the composite transistor array IC3 is electrically connected to one end of the iron core of the relay KJ2, the other end of the iron core of the relay KJ2 is electrically connected to the power supply, and the humidifier is electrically connected to the live wire through the normally open contact of the relay KJ2.

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