阅读说明：本技术 一种家电交流、光伏直流两用便携制冰机 (Dual-purpose portable ice machine of household electrical appliances alternating current, photovoltaic direct current ) 是由 钱欢 白建波 还新新 王苗苗 刘升 李姝瑶 郭苗昕 于 2019-08-23 设计创作，主要内容包括：本发明公开了种家电交流、光伏直流两用便携制冰机,包括太阳能控制器、交流直流转换器、蓄电池、控制单元、温度传感器、压缩制冷系统以及保温蓄冰装置；所述压缩制冷系统包括直流变频压缩机、冷凝器、风扇、膨胀阀、蒸发盘管；所述控制单元分别连接交流直流转换器、太阳能控制器、温度传感器、直流变频压缩机,所述太阳能控制器通过蓄电池供电。所述蒸发盘管设置在保温蓄冰装置的底部；所述温度传感器设置在保温蓄冰装置中。本专利可以实现家电交流和光伏直流以及家电交流、光伏直流同时供电的三种供电方式高效制取冰块,即可在户内使用,也可在户外缺电地区长期使用,本专利具有便携性,因此也可在移动的车辆或者船舶上配合光伏板使用。(The invention discloses a household appliance alternating current and photovoltaic direct current dual-purpose portable ice maker, which comprises a solar controller, an alternating current and direct current converter, a storage battery, a control unit, a temperature sensor, a compression refrigeration system and a heat preservation and ice storage device, wherein the solar controller is connected with the storage battery; the compression refrigeration system comprises a direct-current variable-frequency compressor, a condenser, a fan, an expansion valve and an evaporation coil; the control unit is respectively connected with the alternating current-direct current converter, the solar controller, the temperature sensor and the direct current variable frequency compressor, and the solar controller is powered by the storage battery. The evaporation coil is arranged at the bottom of the heat preservation and ice storage device; the temperature sensor is arranged in the heat preservation and ice storage device. This patent can realize that household electrical appliances exchange and photovoltaic direct current and household electrical appliances exchange, the ice-cube is prepared to three kinds of power supply modes high efficiency that photovoltaic direct current supplied power simultaneously, can use at indoor, also can use for a long time in outdoor power shortage area, and this patent has the portability, consequently also can cooperate the photovoltaic board to use on the vehicle of removal or boats and ships.)

1. a household appliance AC and photovoltaic DC dual-purpose portable ice maker is characterized in that the ice maker comprises a solar controller, an AC-DC converter, a storage battery, a control unit, a temperature sensor, a compression refrigeration system and a heat preservation ice storage device;

The alternating current-direct current converter, the control unit and the compression refrigeration system form a pure commercial power refrigeration mode of alternating current driving of the household appliance;

The solar controller, the storage battery, the alternating current/direct current converter, the control unit and the compression refrigeration system form a household alternating current and photovoltaic direct current simultaneous power supply commercial power/photovoltaic mixed refrigeration mode;

The solar controller, the storage battery, the control unit and the compression refrigeration system form a pure photovoltaic refrigeration mode driven by the photovoltaic module through direct current;

The compression refrigeration system comprises a direct-current variable-frequency compressor, a condenser, a fan, an expansion valve and an evaporation coil;

the control unit is respectively connected with an alternating current-direct current converter, a solar controller, a temperature sensor and a direct current variable frequency compressor, the solar controller supplies power through a storage battery, the direct current variable frequency compressor is connected with a condenser, the condenser is connected with an expansion valve, the expansion valve is connected with an evaporation coil, and the evaporation coil is connected with the direct current variable frequency compressor, so that a closed loop is formed; the compression refrigeration system also comprises a fan, the fan is connected with the direct-current variable-frequency compressor, and the start and stop of the fan are controlled by the direct-current variable-frequency compressor; the evaporation coil is arranged at the bottom of the heat preservation and ice storage device; the temperature sensor is arranged in the heat preservation and ice storage device.

2. The dual-purpose portable ice maker for household appliances alternating current and photovoltaic direct current as claimed in claim 1, wherein: the model of the control unit is ATmega 8.

3. The dual-purpose portable ice maker for household appliances alternating current and photovoltaic direct current as claimed in claim 1, wherein: the condenser is an air-cooled condenser.

4. The dual-purpose portable ice maker for household appliances alternating current and photovoltaic direct current as claimed in claim 1, wherein: the heat-preservation ice-storage device is a heat-preservation ice-storage box and comprises a box body and a box cover.

Technical Field

The invention relates to a household appliance alternating current and photovoltaic direct current dual-purpose portable ice maker, and belongs to the technical field of refrigerators.

background

With the continuous improvement of living standard, people have more and more demand for ice cakes in daily life. At present, a small commercial ice maker on the market adopts 220V alternating current ice making, and the demand of customers for making ice blocks outdoors far away from a power grid is difficult to meet. Especially, the operation and use in remote areas and areas without electricity or electricity, such as mountain areas, etc. are limited. Solar energy is used as a clean renewable energy source, so that a solar refrigeration technology gradually becomes a research hotspot in the refrigeration field. Although the related technical personnel in China develop products such as a photovoltaic refrigerator or a photovoltaic air conditioner which can be used outdoors by using solar energy as clean energy, the products are not commercially produced and used in time due to high price, large volume, low energy utilization rate, single power supply mode and the like.

Disclosure of Invention

the invention discloses a household appliance alternating current and photovoltaic direct current dual-purpose portable ice maker, which can realize the high-efficiency preparation of ice blocks by two power supply modes of household appliance alternating current and photovoltaic direct current, can be used indoors and can also be used for a long time in outdoor power-shortage areas.

the technical scheme of the invention is as follows:

a household appliance alternating current and photovoltaic direct current dual-purpose portable ice maker comprises a solar controller, an alternating current and direct current converter, a storage battery, a control unit, a temperature sensor, a compression refrigeration system and a heat preservation ice storage device;

The alternating current-direct current converter, the control unit and the compression refrigeration system form a pure commercial power refrigeration mode of alternating current driving of the household appliance;

The solar controller, the storage battery, the alternating current/direct current converter, the control unit and the compression refrigeration system form a household alternating current and photovoltaic direct current simultaneous power supply commercial power/photovoltaic mixed refrigeration mode;

The solar controller, the storage battery, the control unit and the compression refrigeration system form a pure photovoltaic refrigeration mode driven by the photovoltaic module through direct current;

The compression refrigeration system comprises a direct-current variable-frequency compressor, a fan, a condenser, an expansion valve and an evaporation coil;

The control unit is respectively connected with an alternating current-direct current converter, a solar controller, a temperature sensor and a direct current variable frequency compressor, the solar controller supplies power through a storage battery, the direct current variable frequency compressor is connected with a condenser, the condenser is connected with an expansion valve, the expansion valve is connected with an evaporation coil, and the evaporation coil is connected with the direct current variable frequency compressor, so that a closed loop is formed; the compression refrigeration system also comprises a fan, the fan is connected with the direct-current variable-frequency compressor, and the start and stop of the fan are controlled by the direct-current variable-frequency compressor; the evaporation coil is arranged at the bottom of the heat preservation and ice storage device; the temperature sensor is arranged in the heat preservation and ice storage device.

preferably, the control unit is of the type ATmega 8.

preferably, the condenser is an air-cooled condenser.

Preferably, the heat preservation and ice storage device is a heat preservation and ice storage box, and comprises a box body and a box cover.

The invention achieves the following beneficial effects:

The invention provides a household appliance alternating current and photovoltaic direct current dual-purpose portable ice maker, which can be powered by 220V alternating current of a household appliance and can also be powered by novel environment-friendly and pollution-free photovoltaic energy. The ice maker overcomes the limitation of single power supply mode and application occasion of the traditional ice maker, realizes coexistence of three power supply modes of pure commercial power, commercial power/photovoltaic mixing and pure photovoltaic, and is suitable for daily ice requirements of indoor and outdoor places and areas without electricity and power shortage. The dual-purpose portable ice maker for alternating current and direct current of household appliances has the advantages of good stability, high safety, low cost, high efficiency, high integration level, simplicity in operation, convenience in cleaning and portability, adopts a photovoltaic direct-drive refrigeration technology, and is more beneficial to environmental protection.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic connection diagram of the control unit.

Detailed Description

the invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, the ice maker for both ac and dc household appliances comprises a solar controller, an ac-dc converter, a storage battery, a control unit, a temperature sensor, a compression refrigeration system and a heat-preservation ice storage device;

the solar controller controls the external photovoltaic module to work at the maximum power point all the time, and simultaneously performs charge and discharge control on the storage battery.

The alternating current-direct current converter converts household 220V alternating current into 12V direct current, and the direct current is directly used for controlling the start and stop of the compressor through the control unit and does not flow through the solar controller and the storage battery any more.

the temperature sensor receives the temperature analog signal in the heat preservation ice storage device, converts the temperature analog signal into a digital signal and transmits the digital signal to the control unit.

The control unit plays a role in coordination control in the whole system, monitors signals such as external temperature and power generation power according to the selected working mode, and controls corresponding components in the system to work. As shown in fig. 2, the control unit is connected to the ac-dc converter, the solar controller, the temperature sensor, and the dc inverter compressor, respectively, and the solar controller is powered by the storage battery.

the alternating current-direct current converter, the control unit and the compression refrigeration system form a pure commercial power refrigeration mode of alternating current driving of the household appliance;

The solar controller, the storage battery, the alternating current/direct current converter, the control unit and the compression refrigeration system form a household alternating current and photovoltaic direct current simultaneous power supply commercial power/photovoltaic mixed refrigeration mode;

The solar controller, the storage battery, the control unit and the compression refrigeration system form a pure photovoltaic refrigeration mode driven by the photovoltaic module through direct current;

the compression refrigeration system comprises a direct-current variable-frequency compressor, a condenser, a fan, an expansion valve and an evaporation coil; the direct current variable frequency compressor is connected with a condenser, the condenser is connected with an expansion valve, the expansion valve is connected with an evaporation coil, and the evaporation coil is connected with the direct current variable frequency compressor, so that a closed loop is formed, and R134a refrigerant is filled in the loop; the compression refrigeration system also comprises a fan, the fan is connected with the direct-current variable-frequency compressor, and the start and stop of the fan are controlled by the direct-current variable-frequency compressor; the evaporation coil is arranged at the bottom of the heat preservation and ice storage device; the temperature sensor is arranged in the heat preservation and ice storage device. The direct-current variable-frequency compressor can adjust the power of the direct-current variable-frequency compressor according to the temperature instruction sent by the control unit, so that the effects of keeping the system stably working with low energy consumption and prolonging the working time of the system are achieved. The direct-current variable-frequency compressor and the fan work under the control of the control unit, so that the temperature of the evaporating coil reaches minus 25 ℃, and after water is added into the heat-preservation and ice-storage device, ice blocks are formed in a static ice-making mode.

Preferably, the control unit is of the type ATmega 8.

Preferably, the condenser is an air-cooled condenser.

preferably, the compression refrigeration system further comprises a fan, the fan is connected with the direct-current variable-frequency compressor, and the start and stop of the fan are controlled by the direct-current variable-frequency compressor.

Preferably, the heat preservation and ice storage device is a heat preservation and ice storage box, and comprises a box body and a box cover. The box body and the box cover are both wrapped by polyurethane hard bubble foam which is a heat-insulating material to form a closed space.

Under the pure commercial power refrigeration mode of the alternating current drive of the household appliance, the control unit is connected with the alternating current-direct current converter, the direct current variable frequency compressor and the temperature sensor, the direct current variable frequency compressor is connected with the condenser, the condenser is connected with the expansion valve, and the expansion valve is connected with the evaporation coil.

In the pure commercial power refrigeration mode of the alternating current drive of the household appliance, the control unit receives a signal generated by the temperature sensor, compares the signal with a set temperature, forms a digital signal according to a comparison result, and sends the digital signal to the alternating current-direct current converter, and the converter switches off or switches on the household alternating current power supply according to an instruction of the control unit. If the control unit detects that the temperature of the temperature sensor is higher than the set temperature, outputting a signal to enable the AC-DC converter to switch on household 220V AC power to convert the household 220V AC power into 12V DC power, inputting the AC power into the DC frequency conversion compressor to control the start of the DC frequency conversion compressor, and controlling the start and the stop of the fan by the DC frequency conversion compressor and matching with the DC frequency conversion compressor; if the control unit detects that the temperature of the temperature sensor is lower than or equal to the set temperature, the output signal enables the current of the alternating current-direct current converter to be cut off, the compressor stops working, and the fan also stops working.

in a commercial power/photovoltaic mixed ice making mode in which household alternating current and photovoltaic direct current are supplied with power simultaneously, an external photovoltaic panel is connected with a control unit, the control unit is connected with a solar controller, a compressor, a temperature sensor and an alternating current-direct current converter, and the solar controller is connected with a storage battery; the refrigerant pipeline connection is that the compressor is connected with the air-cooled condenser, the condenser is connected with the expansion valve, the expansion valve is connected with the evaporation coil, and the evaporation coil is connected with the compressor.

In a commercial power/photovoltaic mixed ice making mode in which household alternating current and photovoltaic direct current are supplied with power simultaneously, Pv is photovoltaic power generation power, and PL is power required by a load (a compressor and a fan); sb is the storage battery capacity, Sbmin is the minimum discharge capacity, and Sbmax is the full charge capacity.

As shown in fig. 2, the solar controller, when not receiving the command of the control unit, defaults to track the maximum photovoltaic power output point at the moment in time with the photovoltaic panel switched on.

Further, under photovoltaic commercial power mixed mode, the temperature that temperature sensor detected is higher than the required ice-making temperature of settlement, and compressor and fan need during operation:

a. When the control unit detects that Pv is greater than PL and Sb is less than Sbmax, the solar controller always tracks the maximum power point of the photovoltaic module, controls and outputs the maximum power, simultaneously directly supplies part of electric quantity to a load to meet the working rated power of the load, and the rest part of electric quantity flows into a storage battery for storage after voltage stabilization; the control unit detects the photovoltaic power generation and load power generation conditions every five minutes, and adjusts the charging voltage and current in real time according to the detection feedback result;

b. When the control unit detects that Pv is greater than PL and Sb = Sbmax, the illumination is sufficient and the storage battery is in a full-charge state, the control unit adjusts a maximum power tracker part in the solar controller, reduces the photovoltaic power generation amount and forces the power generation power Pv = PL of a power point;

c. When the control unit detects that Pv is less than PL and Sb is less than Sbmin, the power generation power of the photovoltaic module and the discharge power of the storage battery can not meet the power required by the load, the control unit is automatically connected to a household 220V alternating current commercial power, the 220V alternating current is converted into 12V stable direct current through the alternating current-direct current converter, and the stable direct current is transmitted to the load to enable the load to work; meanwhile, the solar controller still tracks the maximum power point of the photovoltaic module, and all generated electric quantity is input into the storage battery for storage;

d. The control unit detects that Pv < PL, Sb > Sbmin, the generated power of the photovoltaic module can not meet the working requirement of the load, and the solar controller controls the storage battery to discharge, so that the sum of the generated power of the photovoltaic module and the discharged power of the storage battery is only equal to the power required by the load.

Further, the temperature sensor detects that the temperature is lower than or equal to the set temperature, the compressor and the fan stop working, and the control unit controls the solar controller, so that the generated energy of the photovoltaic module is completely transmitted to the storage battery to be charged, and the solar energy is converted into chemical energy in the storage battery to be temporarily stored.

under the pure photovoltaic refrigeration mode of photovoltaic direct current drive, the external photovoltaic board is connected with the control unit, the control unit is connected with the solar controller, the direct current variable frequency compressor and the temperature sensor, the solar controller is connected with the storage battery, the direct current variable frequency compressor is connected with the condenser, the condenser is connected with the expansion valve, and the expansion valve is connected with the evaporation coil.

in a refrigeration mode of photovoltaic direct drive, if the control unit detects that the temperature of the temperature sensor is higher than a set temperature, a signal is output to enable the solar controller to output direct current from the storage battery and input the direct current into the direct current variable frequency compressor to control the start of the direct current variable frequency compressor, and the start and stop of the fan are controlled by the direct current variable frequency compressor and are matched with the direct current variable frequency compressor; if the control unit detects that the temperature of the temperature sensor is lower than or equal to the set temperature, the output signal enables the solar controller to continuously store the direct current input by the photovoltaic panel in the storage battery, and the direct current variable frequency compressor and the fan are not started.

as shown in fig. 1, after the dc inverter compressor is powered on by dc power, the gaseous low-pressure refrigerant R134a is compressed into high-temperature high-pressure gas, the high-temperature high-pressure gas flows into the condenser along a closed pipeline, under the condition of forced convection heat transfer caused by the operation of the fan, the high-temperature high-pressure gas exchanges heat with the outside normal-temperature air through the wall of the condenser to be condensed into liquid refrigerant, the liquid refrigerant flows into the expansion valve, further flows into the evaporation coil after being cooled and depressurized, and then continues to absorb the heat of the water in the tank through the wall of the evaporation coil to be evaporated, the evaporated refrigerant is low-pressure gas and returns to the compressor along the closed refrigerant pipeline, and the above steps are continued to form a compression refrigeration cycle. After a period of compression refrigeration cycle, the thermal insulation ice storage device condenses the water into ice in a static ice making manner and stores the ice.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.