Control method of a crisper

Abstract

The application provides a control method of a fresh-keeping box, comprising the following steps: in a refrigeration system running state, obtaining the storage temperature in the storage box, judging whether the storage temperature is in a preset storage temperature range; if yes, ending the first evaporator to provide cold energy to the storage box, and providing cold energy to the energy supply unit through the second evaporator arranged in parallel with the first evaporator; if no, providing cold energy to the storage box through the first evaporator, ending the second evaporator to provide cold energy to the energy supply unit, or providing cold energy to the storage box through the first evaporator and providing cold energy to the energy supply unit through the second evaporator at the same time. The first evaporator is used to provide cold energy to the storage box, and the second evaporator is used to provide cold energy to the condensing assembly, and one or both of the evaporators can be opened according to the cold energy supply condition, so that the running and cold energy supply of the whole system are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration preservation, and in particular to a control method of a preservation box. BACKGROUND

[0002] Traditional cold chain logistics usually provides cold energy through a refrigeration system composed of a compressor, a condenser, a throttling element and an evaporator. However, the temperature varies in different seasons and at different time periods of a day, and the temperature difference between day and night is large in some areas. In a harsh working condition, for example, at noon in summer, the compressor cannot work normally or cannot provide sufficient cold energy.

[0003] Therefore, it is necessary to provide a control method of a preservation box to solve the above problems. SUMMARY

[0004] The present application aims to provide a control method of a preservation box, which can ensure normal operation of a refrigeration system or optimal refrigeration efficiency in any working condition.

[0005] To solve one of the above technical problems, the present application adopts the following technical solution:

[0006] A control method of a preservation box comprises the following steps: obtaining a storage temperature in a storage box in a working state of a refrigeration system, and determining whether the storage temperature is within a preset storage temperature range; if yes, ending the first evaporator from providing cold energy to the storage box, and providing cold energy to an energy supply unit through a second evaporator arranged in parallel with the first evaporator; if no, providing cold energy to the storage box through the first evaporator, ending the second evaporator from providing cold energy to the energy supply unit, or providing cold energy to the storage box through the first evaporator and providing cold energy to the energy supply unit through the second evaporator.

[0007] Further, the first evaporator directly provides cold energy to the storage box, and the method for providing cold energy to the storage box is to control refrigeration working medium to flow through the first evaporator; and the method for ending the provision of cold energy to the storage box is to cut off the refrigeration working medium flowing through the first evaporator.

[0008] Alternatively, the first evaporator provides cold energy to the storage box through a first cold supply unit, and the method for providing cold energy to the storage box is to control refrigeration working medium to flow through the first evaporator and to open the first cold supply unit; and the method for ending the provision of cold energy to the storage box is to cut off the refrigeration working medium flowing through the first evaporator and / or to close the first cold supply unit.

[0009] Further, the second evaporator directly provides cold energy to the energy supply unit, and the method for providing cold energy to the energy supply unit is to control refrigeration working medium to flow through the second evaporator; and the method for ending the provision of cold energy to the energy supply unit is to cut off the refrigeration working medium flowing through the second evaporator.

[0010] Or, when the second evaporator provides the energy supply unit with cold energy through the second cooling unit, the method for providing the energy supply unit with cold energy is to control the refrigerant to flow through the second evaporator while the second cooling unit is turned on; and the method for ending the provision of cold energy to the energy supply unit is to cut off the refrigerant flow through the second evaporator and / or turn off the second cooling unit.

[0011] Further, the method further comprises the steps of: judging whether the energy supply unit reaches a preset energy storage range, if not, providing the energy supply unit with cold energy through the second evaporator directly or indirectly; and if yes, ending the provision of cold energy to the energy supply unit by the second evaporator.

[0012] Further, the method further comprises the steps of: judging whether the energy supply unit reaches a preset energy storage range, judging whether the storage temperature reaches a preset storage temperature range, if at least one of the above judgments is no, turning on the refrigeration system; and if both of the above judgments are yes, turning off the refrigeration system.

[0013] Further, when the ambient temperature is lower than a preset ambient temperature range, the energy supply unit is provided with heat through a solar water heater or a waste heat source.

[0014] Further, judging whether the condensing temperature of the refrigeration system exceeds a preset condensing temperature range, if yes, starting the energy supply unit to provide the condensing component with cold energy or heat; and if no, ending the provision of cold energy or heat to the condensing component.

[0015] Further, according to the condensing temperature, at least one of the following is selectively controlled: the air supply amount of the first condenser by the fan, the cold energy supply amount of the second condenser by the energy supply unit, and the heat energy supply amount of the second condenser by the energy supply unit, so as to adjust the condensing temperature to 10℃-80℃, or 30℃-60℃, or 35℃-45℃.

[0016] A control method of a fresh-keeping box, comprising the steps of: obtaining a storage temperature in a storage box, judging whether the storage temperature is within a preset storage temperature range; if yes, turning on a refrigeration system and providing the storage box with cold energy through a first evaporator; and if no, turning off the refrigeration system.

[0017] And when the refrigeration system is running, judging whether the condensing temperature of the refrigeration system is higher than a preset condensing temperature range, if yes, providing the condensing component with cold energy through a second evaporator arranged in parallel with the first evaporator; and if no, cutting off the refrigerant flow through the second evaporator.

[0018] Further, the second evaporator comprises a refrigerant channel and a carrier fluid channel, the refrigerant channel is connected between the throttling element and the compressor; the condensing assembly comprises a first fluid channel and a second fluid channel, the first fluid channel is connected between the compressor and the throttling element; the second evaporator provides cold energy for the condensing assembly through the energy supply unit, the energy supply unit comprises a communication pipe which communicates the second fluid channel and the carrier fluid channel, a communication pump connected to the communication pipe, and carrier fluid in the carrier fluid channel and the communication pipe and the second fluid channel; when the condensing temperature is higher than the preset condensing temperature range, the refrigeration supply flowing through the second evaporator is controlled, and the communication pump is started; when the condensing temperature is not higher than the preset condensing temperature range, the refrigeration working fluid flowing through the second evaporator is cut off, and / or the communication pump is closed.

[0019] Further, the energy supply unit further comprises an energy storage unit, whether the condensing temperature of the refrigeration system exceeds the preset condensing temperature range is judged, if yes, the energy supply unit is started to provide cold energy or heat energy for the condensing assembly, and the condensing temperature is adjusted to 10-80℃, or 30-60℃, or 35-45℃; if not, the providing of cold energy or heat energy for the condensing assembly is ended.

[0020] The present application has the following advantages: the first evaporator is used to provide cold energy for the storage tank, the second evaporator is used to provide cold energy for the condensing assembly, the condensing temperature of the refrigeration system is adjusted to the preset condensing temperature range, so that the refrigeration system can normally operate or keep the best operating state under any operating condition; and the first evaporator and the second evaporator are connected in parallel, and can be opened according to the cold energy supply condition, so that the operation and cold energy supply of the whole system are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of a condensing temperature management system of a preferred embodiment of the present application;

[0022] Figure 2 is a schematic diagram of a condensing temperature management system of another preferred embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a condensing temperature management system of another preferred embodiment of the present application;

[0024] Figure 4 is a schematic diagram of a condensing temperature management system of another preferred embodiment of the present application;

[0025] Figure 5 is a schematic diagram of a condensing temperature management system of another preferred embodiment of the present application;

[0026] Figure 6 is a schematic diagram of a condensing temperature management system of another preferred embodiment of the present application;

[0027] Figure 7 This is a schematic diagram of an evaporator in one embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of an evaporator in another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram showing the cooperation of the evaporator, energy supply unit, and storage box in one embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram showing the cooperation of the evaporator, energy supply unit, and storage box in another embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram showing the cooperation of the evaporator, energy supply unit, and storage box in another embodiment of the present invention;

[0032] Figure 12 This is a schematic diagram showing the cooperation of the evaporator, energy supply unit, and storage box in another embodiment of the present invention;

[0033] Figure 13 This is a schematic diagram of the structure of a food storage box according to a specific embodiment of the present invention;

[0034] Figure 14 for Figure 13 A breakdown diagram from another angle;

[0035] Figure 15 for Figure 13 A schematic diagram showing the coordination between the refrigeration system, the condensing temperature management system, and the storage box.

[0036] Figure 16 for Figure 15 A schematic diagram showing the coordination between the refrigeration system and the condensing temperature management system;

[0037] Figure 17 for Figure 16 A magnified view of a portion of the image. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0039] Please refer to Figures 1-17 As shown, the food storage box of the present invention includes a storage box 100 and a refrigeration system 1.

[0040] The refrigeration system 1 comprises a refrigeration circuit 11 and refrigeration working medium located in the refrigeration circuit 11, the refrigeration circuit comprises a compressor 12, a condensing assembly 13, a throttling element 14 and an evaporator 15 connected in sequence through pipes. The refrigeration system 1 can also comprise oil separation and other conventional elements, which are common technical means in the art and will not be listed one by one, and the working principle of refrigeration will not be described again.

[0041] In the present application, as shown in Figure 7 and Figure 8 The evaporator 15 comprises a first evaporator 151 directly or indirectly supplying cold to the storage box 100 and a second evaporator 152 directly or indirectly supplying cold to the condensing assembly 13.

[0042] The first evaporator 151 and the second evaporator 152 are connected in parallel, and the parallel connection includes:

[0043] In an embodiment, as shown in Figure 7 The first evaporator 151 and the second evaporator 152 are connected in parallel between the throttling element 14 and the compressor 45. Preferably, a switch valve is arranged in front of the first evaporator 151 and the second evaporator 152 respectively; or the first evaporator 151 and the second evaporator 152 are connected to an electromagnetic three-way valve to control the refrigeration working medium to pass through the first evaporator 151 or the second evaporator 152 alternatively; or to control the refrigeration working medium to pass through the first evaporator 151 and the second evaporator 152 simultaneously.

[0044] In another embodiment, as shown in Figure 8 The throttling element 14 comprises a first throttling element 141 and a second throttling element 142 connected in parallel, the first evaporator 151 is connected between the first throttling element 141 and the compressor 12, and the second evaporator 152 is connected between the second throttling element 142 and the compressor 12. Preferably, the first throttling element 141 and the second throttling element 142 are electronic expansion valves, and whether the refrigeration working medium passes through the corresponding first evaporator 151 or second evaporator 152 is controlled by the opening or closing of the electronic expansion valves.

[0045] The way in which the first evaporator 151 supplies cold to the storage box 100 includes but is not limited to the following:

[0046] The first evaporator 151 is arranged in the storage box 100, preferably at the top of the storage box 100; further, the air circulation in the storage box 100 is accelerated by a fan to accelerate the heat exchange speed.

[0047] Alternatively, the first evaporator 151 supplies cold to the storage box through a first cold supply unit 3.

[0048] In one embodiment, the first cooling unit 3 comprises an air duct in communication with the storage box 100, a fan driving air to circulate in the storage box 100 and the air duct, and the first evaporator 151 is located in the air duct, and the air after heat exchange with the first evaporator 151 is circulated to the storage box 100 to provide cold energy for the storage box 100.

[0049] In another embodiment, the first cooling unit 3 comprises a cold storage box 30, a heat exchanger 31, a first cooling pipe 32 and a first return cooling pipe 33 connecting the cold storage box 30 and the heat exchanger 31, and a first circulating pump 34 connected to the first cooling pipe 32 or the first return cooling pipe 33, and the cold storage box 30 is provided with a cold storage material, and the first evaporator 151 is located in the cold storage box 30.

[0050] The heat exchanger 31 is located in the storage box 100, preferably at the top of the storage box 100, and air is driven to circulate by a fan to accelerate the heat exchange speed. When the first circulating pump 34 is started, the cold carrier circulates and transfers the cold energy of the refrigerant to the storage box 100 through the heat exchanger 31. Alternatively, the heat exchanger 31 is arranged in an air duct in communication with the storage box 100, and the air after heat exchange with the heat exchanger 31 is circulated to the storage box 100 under the action of the fan to provide cold energy for the storage box 100.

[0051] In another embodiment, the first evaporator 151 comprises a refrigerant passage and a cold carrier passage, and the refrigerant passage is connected between the throttling element and the compressor. The first cooling unit 3 comprises a cold storage box 30 in communication with the cold carrier passage through a circulating pipe, a circulating pump arranged on the circulating pipe, a heat exchanger 31, a first cooling pipe 32 and a first return cooling pipe 33 connecting the cold storage box 30 and the heat exchanger 31, and a first circulating pump 34 connected to the first cooling pipe 32 or the first return cooling pipe 33, and the cold storage box is provided with a cold storage material. As described in the above embodiment, the heat exchanger 31 is located in the storage box 100 or arranged in an air duct in communication with the storage box 100.

[0052] In another embodiment, the first evaporator 151 comprises a refrigerant passage and a cold carrier passage, and the refrigerant passage is connected between the throttling element 14 and the compressor. The first cooling unit 3 comprises a heat exchanger 31, a first cooling pipe 32 and a first return cooling pipe 33 connecting the cold carrier passage and the heat exchanger 31, a first circulating pump 34 connected to the first cooling pipe 32 or the first return cooling pipe 33, and a cold carrier circulating in the cold carrier passage and the first cooling pipe 32 and the first return cooling pipe 33.

[0053] The second evaporator 152 provides cold energy to the condensing assembly 13 in the following ways, but not limited to:

[0054] The fresh-keeping box further comprises a condensing temperature management module 2 for transferring the cold energy of the second evaporator 152 to the condensing assembly 13. The refrigeration system 1 and the condensing temperature management module 2 can be collectively referred to as a condensing temperature management system 200.

[0055] Specifically, the condensing temperature management module 2 comprises a sensor for detecting the condensing temperature of the refrigeration system 1, an energy supply unit for transferring the cold energy of the second evaporator 152 to the condensing assembly 13, and a temperature control unit in communication connection with the sensor and the energy supply unit. According to the detection result of the sensor, the temperature control unit controls the cold energy provided by the energy supply unit to the condensing assembly 13, so as to maintain the condensing temperature of the refrigeration system 1 within a preset condensing temperature range. Wherein, “providing cold energy” means providing a medium with lower temperature to the condensing assembly 13.

[0056] In addition, the condensing temperature management module 2 can also provide heat to the condensing assembly 13 through the energy supply unit, i.e. providing a medium with higher temperature to the condensing assembly 13. Specifically, the condensing temperature management module 2 can provide cold energy, or can provide heat, or can provide both heat and cold energy, but the cold energy and the heat are provided under different conditions, and the cold energy and the heat are not provided at the same time; so as to maintain the condensing temperature within the preset condensing temperature range, and ensure the normal operation of the entire system and the high-efficiency refrigeration performance.

[0057] When the sensor detects that the condensing temperature of the refrigeration system 1 is higher than the preset condensing temperature range, the energy supply unit provides cold energy to the condensing assembly 13; when the sensor detects that the condensing temperature of the refrigeration system 1 is lower than the preset condensing temperature range, the energy supply unit reduces the supply of cold energy, or stops the supply of cold energy, or provides heat to the condensing assembly 13; the condensing temperature is controlled within the preset temperature range, so as to ensure that the refrigeration system 1 can normally operate or maintain the best operating state under any working condition.

[0058] In the present application, the preset condensing temperature range is between 10℃ and 80℃; preferably between 30℃ and 60℃, and more preferably between 35℃ and 45℃. Within the preferred range, the refrigeration efficiency of the refrigeration system is high. Specifically, the condensing temperatures of different refrigeration working substances are different, as shown in Table 1.

[0059] Table 1 Normal working condensing temperature and optimal working condensing temperature of different refrigeration working substances

[0060]

[0061] The sensor directly or indirectly detects the condensing temperature of the refrigeration system 1, including but not limited to the following:

[0062] In one embodiment, the sensor comprises a pressure sensor for acquiring the pressure of the refrigerant, which is arranged at any position of the refrigeration circuit between the outlet of the compressor 12 and the inlet of the throttling element 14, specifically including being arranged at the outlet of the compressor 12, or at the inlet of the throttling element 14, or on the pipeline connecting the outlet of the compressor 12 and the inlet of the throttling element 14. The pressure on this section of the refrigeration circuit 11 is almost the same, so the result measured by the pressure sensor arranged at any position is basically the same; then the condensing temperature is converted according to the detected pressure.

[0063] In another embodiment, the sensor comprises a temperature sensor for acquiring the temperature of the refrigerant, which is arranged at the rear half of the condensing assembly 13 or between the outlet of the condensing assembly 13 and the inlet of the throttling element 14, and the temperature of the liquid refrigerant collected thereby is basically the same as or slightly different from the condensing temperature, which can be approximately taken as the condensing temperature, or is calibrated as the condensing temperature according to experience. The arrangement "between the outlet of the condensing assembly 13 and the inlet of the throttling element 14" includes arranging the temperature sensor at the outlet of the condensing assembly 13, or at the inlet of the throttling element 14, or at any position of the refrigeration circuit connecting the outlet of the condensing assembly 13 and the inlet of the throttling element 14. Generally, the condensing process of the refrigerant is completed in the condensing assembly 13, so it is preferred to arrange the temperature sensor at the rear half of the condensing assembly 13 or at the outlet of the condensing assembly 13.

[0064] In another embodiment, the sensor comprises an ambient temperature sensor for acquiring the ambient temperature, and the condensing temperature is converted according to the detected ambient temperature. The ambient temperature is arranged at any position of the condensing assembly 13 or the refrigeration system, and can also be arranged on the product using the condensing temperature management system 100. The ambient temperature refers to the temperature of the environment in which the condensing assembly 13 works, for example, the ambient temperature sensor is placed at the air inlet of the air-cooled condenser. At this time, if the detected temperature is high, the ambient temperature is high, and the air passing through the condenser cannot effectively cool the condenser, resulting in a high condensing temperature.

[0065] Alternatively, in other embodiments, the sensor comprises at least two of the pressure sensor, the temperature sensor and the ambient temperature sensor, and the detection is performed by at least two sensors. On the one hand, the sensors can calibrate each other to improve the accuracy of the detection data; on the other hand, when one sensor fails, the other sensor can ensure the normal operation of the condensing temperature management module 2.

[0066] In the present application, the cold energy provided by the energy supply unit to the condensing assembly 13 comes from the second evaporator 152, and the condensing temperature management can be realized without the help of external refrigeration or cooling system.

[0067] The following will describe how the energy supply unit supplies the cold energy of the second evaporator 152 to the condensing assembly 13 in combination with the structure of the condensing assembly 13.

[0068] In the first embodiment, as shown in the figure, the condensing assembly 13 includes a first air-cooled condenser 131, which includes a condensing pipe and preferably also includes heat dissipation fins to increase the heat exchange area and improve the heat exchange performance. Figures 1-3

[0069] Correspondingly, the energy supply unit includes at least one fan 21 arranged on one side of the first condenser 131 and a first energy storage unit 22 for providing the air passing through the first condenser 131 with cold energy. The fan 21 and the first energy storage unit 22 are both in communication connection with the temperature control unit.

[0070] When the number of fans 21 is at least two, all the fans 21 are located on the same side of the first condenser 131 to avoid the formation of vortex at the first condenser 131, which is not conducive to heat dissipation. Preferably, the first condenser 131 is located on the air suction side of the fan 21, and the air uniformly passes through the first condenser 131, so that the heat exchange performance is good.

[0071] The temperature control unit controls the speed of the fan 21 to be adjusted between 0 and 100% according to the detected condensing temperature, and controls the cooling capacity by the amount of air supply per unit time. When the speed is 0, the fan 21 is in the closed state; when the speed is 100%, the fan 21 is in the full load state. Specifically, taking cooling as an example, when the condensing temperature is too high, the speed of the fan 21 is increased to increase the air supply per unit time; when the condensing temperature decreases, the speed of the fan 21 is reduced or the fan 21 stops working.

[0072] The first energy storage unit 22 includes a first energy storage container 221, a first energy storage material located in the first energy storage container 221, a heat sink 222, a first output pipe 223 connecting the inlet of the first energy storage container 221 and the inlet of the heat sink 222, a first return pipe 224 connecting the outlet of the heat sink 222 and the first energy storage container 221, and a first transmission pump 225 connected to the first output pipe 223 or the first return pipe 224, wherein the first transmission pump 225 is in communication connection with the temperature control unit; the second evaporator 152 directly or indirectly supplies cold energy to the first energy storage material through the second cooling unit 4.

[0073] ​According to the working environment of the refrigeration system 1, the energy storage material is matched. If the working environment is generally a high-temperature environment, a first energy storage material with a lower temperature or a lower phase change temperature is matched; if the working environment is generally a low-temperature environment, a first energy storage material with a higher temperature or a higher phase change temperature is matched.

[0074] Preferably, the phase change temperature of the first energy storage material is -80℃ to 45℃, preferably -40℃ to 30℃. The first energy storage material can provide cold energy for the first condenser 131 at high temperature and can provide heat for the first condenser 131 at low temperature; at this time, the first energy storage unit for cooling and heating is the same. Of course, the first energy storage unit for cooling and heating can also be two units with the same or different structures, each of which operates independently.

[0075] Reference Figures 1-3 , Figures 5-6 As shown by the arrow in the middle, along the direction of the air flow passing through the first condenser 131, the heat sink 222 is located on the air inlet side of the first condenser 131. Specifically, when the first condenser 131 is located on the air suction side of the fan 21, the heat sink 222 is located on the side of the first condenser 131 away from the fan 21; when the first condenser 131 is located on the air outlet side of the fan 21, the heat sink 222 is located between the first condenser 131 and the fan 21, or on the air suction side of the fan 21.

[0076] The first transmission pump 225 is started, the first energy storage material flows between the first energy storage container 221 and the heat sink 222, and releases cold energy or heat energy to the outside through the heat sink 222. Under the driving of the fan 21, the air after heat exchange with the heat sink 222 flows to the first condenser 131 to provide cold energy or heat energy for the first condenser 131.

[0077] In the second type of embodiment, as shown in Figure 4 The condensing assembly 13 includes a water-cooled second condenser 132, the second condenser 132 includes a first fluid passage and a second fluid passage, the first fluid passage is connected between the outlet of the compressor 12 and the inlet of the throttling element 14, and the second fluid passage is used to communicate with the energy supply unit.

[0078] The second condenser 132 includes but is not limited to: a plate heat exchanger, a shell-and-tube condenser, and a double-pipe condenser. As long as a heat exchanger capable of providing two fluid passages for heat exchange can be used as the second condenser 132.

[0079] Correspondingly, the energy supply unit comprises a second energy storage unit 23 in communication with the second fluid channel, the second energy storage unit 23 comprising a second energy storage container 231, a second energy storage material in the second energy storage container 231, a second output pipe 232 in communication between the second energy storage container 231 and the inlet of the second fluid channel, a second return pipe 233 in communication between the outlet of the second fluid channel and the second energy storage container 231, and a second transfer pump 234 connected to the second output pipe 232 or the second return pipe 233, the second transfer pump 234 being in communication connection with the temperature control unit. The second energy storage unit for cooling and heating can be one or two. The second evaporator 152 directly or indirectly through the second cooling unit 4 supplies cold energy to the second energy storage material for cooling.

[0080] When the second transfer pump 234 is started, the second energy storage material flows between the second energy storage container 231 and the second fluid channel, and exchanges heat with the refrigerant in the first fluid channel to provide cold energy or heat.

[0081] The second energy storage material is selected in the same matching manner as the first energy storage material, which will not be repeated here.

[0082] The third type of embodiment, as shown in Figures 5-6 The condensing assembly 13 comprises the above-mentioned air-cooled first condenser 131 and water-cooled second condenser 132, and the first condenser 131 is in series with the first fluid channel. The condensing temperature management module 2 is configured to provide cold energy to the first condenser 131 as described in the first type of embodiment, and to provide cold energy to the second condenser 132 as described in the second type of embodiment. The third type of embodiment is essentially a superposition of the first type of embodiment and the second type of embodiment.

[0083] The inventor found in further research that the medium for providing cold energy to the first condenser 131 by the fan 21 is air without pollution and without the need for post-processing; the medium for providing cold energy or heat to the second condenser 132 by the second energy storage unit 23 is liquid energy storage material; the air-cooled first condenser 131 has low cost, environmental friendliness and high control flexibility in temperature control, but its cooling effect is not as good as that of the water-cooled second condenser 132.

[0084] In one embodiment, the outlet of the first condenser 131 is in communication with the inlet of the first fluid passage. In a relatively mild working environment suitable for the refrigeration system 1, the air-cooled first condenser 131 can control the condensing temperature within the preset condensing temperature range in most cases. For example, the refrigeration working medium at high temperature and high pressure from the compressor 12 first passes through the first condenser 131 and then passes through the second condenser 132. If the preset condensing temperature range is reached after passing through the air-cooled first condenser 131, the second energy storage unit 23 does not need to be started to provide cold energy to the second condenser 132. If the preset condensing temperature range is not reached, the second transmission pump 234 is started to supplement a part of cold energy to the second condenser 132, thereby saving energy as a whole.

[0085] At this time, when the sensor includes the temperature sensor, the temperature sensor is preferably located in the second half of the first condenser 131 or between the outlet of the first condenser 131 and the inlet of the first fluid passage, so as to determine the temperature of the refrigeration working medium after passing through the first condenser 131 located upstream in time, and then determine whether the second energy storage unit 23 needs to be started. Of course, the temperature sensor can also be arranged in the second half of the second condenser 132 or at the outlet thereof.

[0086] In another embodiment, the inlet of the first condenser 131 is in communication with the outlet of the first fluid passage. In a relatively harsh working environment suitable for the refrigeration system 1, for example, in a high-temperature environment all year round or in an area near the equator. The refrigeration working medium at high temperature and high pressure from the compressor 12 first passes through the second condenser 132 and then passes through the first condenser 131. If the preset condensing temperature range is reached after passing through the second condenser 132, the fan 21 does not need to be started to provide cold energy to the first condenser 131. If the preset condensing temperature range is not reached, the fan 21 is started to provide cold energy to the first condenser 131.

[0087] At this time, when the sensor includes the temperature sensor, the temperature sensor is located in the second half of the second condenser 132 or between the outlet of the first fluid passage and the inlet of the first condenser 131. The temperature of the refrigeration working medium after passing through the second condenser 132 located upstream is determined in time to determine whether the fan 21 needs to be started. Of course, the temperature sensor can also be arranged in the second half of the first condenser 131 or at the outlet thereof.

[0088] In a fourth type of embodiment, the difference from the third type of embodiment is only that the first condenser 131 is connected in parallel with the first fluid passage, and other details are not repeated. In this paper, if the flow of the branch needs to be adjusted, the electromagnetic three-way valve is connected, and the following details are not repeated.

[0089] For convenience of description, the first energy storage unit 22 and the second energy storage unit 23 are collectively referred to as energy storage units 22, 23, and the rest of the structures of the two are basically the same except that the first energy storage unit 22 has the heat sink 222; the first energy storage container 221 and the second energy storage container 231 are collectively referred to as energy storage containers 221, 231; and the first energy storage material and the second energy storage material are collectively referred to as energy storage materials.

[0090] In the present application, the second evaporator 152 is used to supply cold to the energy storage material in the above four types of embodiments, and when the condensing temperature needs to be adjusted, the energy storage material is used to supply the condensing assembly 13. The ways in which the second evaporator 152 supplies cold to the energy storage material include but are not limited to:

[0091] The first embodiment, as shown in Figure 9 , the second evaporator 152 is located in the energy storage container 221, 231 and directly supplies cold to the energy storage material.

[0092] Alternatively, the second evaporator 152 supplies cold to the energy storage material through the second cold supply unit 4, including but not limited to the following:

[0093] The second embodiment, as shown in Figure 10 , the second evaporator 152 includes a refrigerant channel and a coolant channel, and the refrigerant channel is connected between the throttling element 14 and the compressor 12.

[0094] The second cold supply unit 4 includes a second cold supply pipe 41 and a second return pipe 42 that communicate the coolant channel and the energy storage container 221, 231, a first cold charging pump 43 connected to the second cold supply pipe 41 or the second return pipe, and energy storage material circulating in the coolant channel and the second cold supply pipe 41 and the second return pipe, and the first cold charging pump 43 is in communication connection with the temperature control unit. When the first cold charging pump 43 works, the energy storage material exchanges heat with the refrigerant in the coolant channel, the temperature is reduced, and the cold is stored.

[0095] The third embodiment, as shown in Figure 11 , the difference from the second embodiment shown in Figure 10 is only that:

[0096] The second cooling supply unit 4 comprises a pair of cold charging interfaces arranged on the energy storage container, a cold charging pipe 44 connected between the pair of cold charging interfaces, a third cooling supply pipe 45 and a third return pipe 46 respectively connected with the two ends of the cold charging pipe 44 and the coolant channel, a second cold charging pump 47 connected to the third cooling supply pipe 45 or the third return pipe 46, and coolant circulating in the coolant channel, the third circulating pipe and the cold charging pipe 44, wherein the second cold charging pump 47 is in communication connection with the temperature control unit. When the second cold charging pump 47 is working, the coolant flows through the cold charging pipe 44 to provide cold energy to the energy storage material.

[0097] Please refer to Figures 13-17 As shown in the figure, it is a specific fresh-keeping box, and the first evaporator 151 of the refrigeration system is arranged in the storage box 100 to provide cold energy for the storage box 100, and the remaining structures are arranged outside the storage box, for example, the front side. In the refrigeration system, the first condenser 131 and the second condenser 132 are connected in series, and the condensation temperature pipe system adjusts the cold energy provided to the two condensers to adjust the condensation temperature of the entire refrigeration system.

[0098] In this embodiment, only one energy storage container 221 (223) is arranged, and the second evaporator 152 is arranged in the energy storage container 221 (223). The energy storage container 221 (223) outputs the energy storage material to the outside through a transmission pump 225 (234), and the first output pipe 223 and the second output pipe 232 are connected to the transmission pump 225 (234) through an electronic three-way valve in parallel, and the first return pipe 224 and the second return pipe 233 are connected to the energy storage container 221 (223) in parallel. Specifically, the transmission pump 225 (234) is used in cooperation with the electronic three-way valve to adjust the cooling energy supplied to the first condenser 131 and the second condenser 132, respectively.

[0099] In addition, as shown in the figure, Figure 17 The heat sink 222 is integrated with the first condenser 131. Specifically, the heat dissipation pipe of the heat sink 222 is fixed together with the condensation pipe, and the heat dissipation pipe is located on the air inlet side of the condensation pipe.

[0100] The application also provides a control method of the fresh-keeping box, mainly including operation control of the refrigeration system 1 and cooling supply control of the evaporator 15.

[0101] Based on the first to third embodiments, the application provides a control method for the fresh-keeping box. The method comprises the following steps: obtaining the storage temperature in the storage box 100 in the running state of the refrigeration system 1, judging whether the storage temperature is in the preset storage temperature range, if yes, ending the first evaporator 151 to provide cold energy to the storage box 100, and directly or indirectly providing cold energy to the energy supply unit by the second evaporator 152; if no, directly or indirectly providing cold energy to the storage box 100 by the first evaporator 151, and ending the second evaporator 152 to provide cold energy to the energy supply unit.

[0102] The method provides cold energy to the energy supply unit by the second evaporator 152 and stores the cold energy when the storage box 100 does not need to be provided with cold energy, and then provides the condensing assembly 13 with the cold energy to adjust the condensing temperature when needed.

[0103] When the first evaporator 151 directly provides cold energy to the storage box 100, the refrigeration working medium flowing through the first evaporator 151 can provide cold energy to the storage box 100, and the refrigeration working medium flowing through the first evaporator 151 is cut off to end the cold energy supply to the storage box 100.

[0104] When the first evaporator 151 indirectly provides cold energy to the storage box 100, the refrigeration working medium flowing through the first evaporator 151 is controlled, and the first cold supply unit 3 is opened to provide cold energy to the storage box 100. The method for ending the first evaporator 151 to provide cold energy to the storage box 100 is to cut off the refrigeration working medium flowing through the first evaporator 151 and / or close the first cold supply unit 3 that transmits the cold energy of the first evaporator 151 to the storage box 100.

[0105] When the second evaporator 152 directly provides cold energy to the energy supply unit, the refrigeration working medium flowing through the second evaporator 152 can provide cold energy to the energy supply unit, and the refrigeration working medium flowing through the second evaporator 152 is cut off to end the cold energy supply to the energy supply unit.

[0106] When the second evaporator 152 indirectly provides cold energy to the energy supply unit, the refrigeration working medium flowing through the second evaporator 152 is controlled, and the second cold supply unit 4 is opened to provide cold energy to the energy supply unit. The method for ending the second evaporator 152 to provide cold energy to the energy supply unit is to cut off the refrigeration working medium flowing through the second evaporator 152 and / or close the second cold supply unit 4 that transmits the cold energy of the second evaporator 152 to the energy supply unit.

[0107] Preferably, the control method for the fresh-keeping box further comprises the following steps: judging whether the energy supply unit reaches the preset energy storage range, if yes, ending the second evaporator 152 to provide cold energy to the energy supply unit; if no, providing cold energy to the energy supply unit by the second evaporator 152.

[0108] The control method of the fresh-keeping box further comprises the steps of judging whether the storage temperature reaches a preset storage temperature range, judging whether the energy supply unit reaches a preset energy storage range, and turning on the refrigeration system 1 if at least one of the above judgments is no; and turning off the refrigeration system 1 if both of the above judgments are yes.

[0109] The application further provides a second control method of the fresh-keeping box, which is different from the first control method of the fresh-keeping box only in that cold energy is directly or indirectly provided to the storage box 100 by the first evaporator 151, and cold energy is directly or indirectly provided to the energy supply unit by the second evaporator 152, and the second control method is generally applicable to a scene in which cold energy needs to be provided to the energy supply unit urgently.

[0110] In the application, the method for providing heat to the energy supply unit includes but is not limited to the following cases:

[0111] A solar water heater is arranged outside the fresh-keeping box, the solar water heater is provided with energy storage materials, and is communicated with the energy storage containers 221 and 231 through a heat supply circulation pipe, a heat supply pump is arranged on the heat supply circulation pipe, the heat supply pump is in communication connection with the temperature control unit, and the energy storage materials are driven to circulate in the solar water heater and the energy storage containers when heat charging is needed.

[0112] Alternatively, the energy storage container is provided with a pair of heat charging interfaces, a heat charging pipe connected between the pair of heat charging interfaces, the solar water heater is provided with a cold carrier, and is communicated with the pair of heat charging interfaces through a heat supply circulation pipe, a heat supply pump is arranged on the heat supply circulation pipe, the heat supply pump is in communication connection with the temperature control unit, and the cold carrier is driven to circulate in the solar water heater and the heat charging pipe to provide heat for the energy storage materials when heat charging is needed.

[0113] Alternatively, the fresh-keeping box is arranged on a vehicle, a ship, an airplane or the like, and heat is provided for the energy storage materials by waste heat generated in the transportation process of the vehicle. Taking the fresh-keeping box transported by a vehicle as an example, the heat supply circulation pipe communicated with the energy storage containers 221 and 231 or the pair of heat charging interfaces can be extended to a waste heat source such as an engine, an exhaust pipe or a generator, and heat is obtained from the waste heat source by an external heat exchanger or the heat supply circulation pipe is arranged around the waste heat source.

[0114] The pair of heat charging interfaces and the pair of heat cooling interfaces can be the same or different, and the heat charging pipe and the heat cooling pipe can be the same or different.

[0115] The application further provides a third control method of the fresh-keeping box, in which heat is obtained from a solar water heater or a waste heat source and stored in an energy storage unit when the ambient temperature is relatively low, for example, lower than a preset ambient temperature range.

[0116] Based on the above all the preservation box control method, in the refrigeration system operating state, judge the condensing temperature of the refrigeration system whether exceeds the preset condensing temperature range, if yes, start the energy supply unit to provide cold or heat to the condensing assembly; if not, no need to supply cold or heat.

[0117] Preferably, after each time the energy supply unit provides cold to the condensing assembly ends, the second evaporator 152 provides cold to the energy supply unit, when the working condition suddenly becomes worse, the condensing assembly is provided with cold in time.

[0118] The following focuses on the description: how the energy supply unit stored with cold and / or heat adjusts the condensing temperature.

[0119] Based on or for the first type of embodiment with only air-cooled first condenser, the condensing temperature is mainly adjusted by controlling the air supply amount of the fan 21, the cold supply amount or the heat supply amount of the first energy storage unit 22.

[0120] The control method of the preservation box further comprises the following steps: obtaining the condensing temperature of the refrigeration system 1; according to the condensing temperature, selectively controlling at least one of the air supply amount of the fan 21 to the first condenser 131, the cold supply amount of the first energy storage unit 22, or the heat supply amount of the first energy storage unit 22, to control the condensing temperature within the preset condensing temperature range, for example, between 10℃~80℃, or between 30℃~60℃, or between 35℃~45℃.

[0121] Specifically, the obtaining of the condensing temperature of the refrigeration system 1 includes but is not limited to the following methods: obtaining the pressure of the refrigerant between the outlet of the compressor 12 and the inlet of the throttling element 14, and converting the condensing temperature according to the pressure. Or, obtaining the temperature of the refrigerant at the latter half of the first condenser 131, or at the outlet of the first condenser 131, or on the pipeline connected with the outlet of the first condenser 131, and converting the condensing temperature through the temperature of the refrigerant; specifically, the temperature sensor probe can be directly placed in the refrigerant to directly obtain the temperature of the refrigerant, or the temperature can be obtained outside the refrigerant circuit, and then the temperature of the refrigerant is obtained through correction. Or, obtaining the ambient temperature and converting the condensing temperature according to the ambient temperature; usually, the temperature of the air inlet side of the air-cooled condenser is obtained to roughly estimate the condensing temperature.

[0122] Specifically, if the obtained condensing temperature is higher than the preset condensing temperature range, and the condensing temperature is still higher than the preset condensing temperature range after a predetermined time, it is determined that the condensing temperature is higher than the preset condensing temperature range; if the obtained condensing temperature is lower than the preset condensing temperature range, and the condensing temperature is still lower than the preset condensing temperature range after a predetermined time, it is determined that the condensing temperature is lower than the preset condensing temperature range.

[0123] When the condensing temperature is lower than the set condensing temperature range, the air supply amount is reduced, or the cooling amount of the first energy storage unit is reduced, or the heating amount of the first energy storage unit is increased; when the condensing temperature is higher than the set condensing temperature range, the air supply amount is increased, or the cooling amount of the first energy storage unit is increased; and the condensing temperature is adjusted to the preset condensing temperature range.

[0124] Specifically, when the condensing temperature is higher than the preset condensing temperature range, the adjustment of the air supply amount is superior to the adjustment of the cooling amount of the first energy storage unit, that is, the air supply amount supplied to the first condenser 131 is first increased, and if the demand cannot still be met, the first energy storage unit is started to provide cooling.

[0125] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, it is indicated that the cooling is excessive, and at this time, the adjustment of the cooling amount of the first energy storage unit is prior to the adjustment of the air supply amount, so that the condensing temperature can be quickly responded and adjusted to the preset condensing temperature range.

[0126] Specifically, when the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, it is first judged whether the first energy storage unit is cooling, if yes, the cooling amount of the first energy storage unit is reduced; and if no, the air supply amount of the fan is reduced.

[0127] Further, when the air supply amount of the fan is reduced to 0, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the heating amount of the first energy storage unit is provided, and the fan is started at the same time, so that the condensing temperature is maintained in the preset condensing temperature range.

[0128] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is lower than the preset ambient temperature range, the adjustment of the air supply amount of the fan is superior to the adjustment of the heating amount of the first energy storage unit.

[0129] Specifically, it is judged whether the fan is running, if yes, the air supply amount is reduced to 0; and if no, the heating amount of the first energy storage unit is provided, and the fan is started at the same time.

[0130] Further, when the air supply amount is reduced to 0, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the fan is started, and the heating amount of the first energy storage unit is provided.

[0131] In the present application, the air supply amount is adjusted by the number of the fan 21 working and the rotating speed of the fan 21.

[0132] In addition, based on or for the second type of embodiment of the water-cooled second condenser, the condensing temperature is mainly adjusted by controlling the cooling or heating amount of the second energy storage unit 33.

[0133] The control method of the fresh-keeping box further comprises the following steps: obtaining the condensing temperature of the refrigeration system 1; and controlling the cooling capacity or the heating capacity of the second energy storage unit 33 according to the condensing temperature, so as to control the condensing temperature to be between 10°C and 80°C, or between 30°C and 60°C, or between 35°C and 45°C within a preset condensing temperature range.

[0134] Specifically, the method of obtaining the condensing temperature of the refrigeration system 1 is basically the same as the above method, and the difference is only that the temperature of the refrigeration working medium is obtained at the latter half of the second condenser 132, or at the outlet of the second condenser 132, or on the pipeline connected to the outlet of the second condenser 132.

[0135] When the condensing temperature is lower than the set condensing temperature range, the cooling capacity of the second energy storage unit is reduced, or the heating capacity of the second energy storage unit is increased.

[0136] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, it means that the cooling is excessive. First, it is judged whether the second energy storage unit is cooling, if yes, the cooling capacity of the second energy storage unit is reduced to 0; if no, heat is provided by the second energy storage unit.

[0137] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is lower than the preset ambient temperature range, heat is provided to the second condenser by the second energy storage unit.

[0138] When the condensing temperature is higher than the set condensing temperature range, the cooling capacity is increased; and the condensing temperature is adjusted to be within the preset condensing temperature range.

[0139] Based on or for the third type of embodiment or the fourth type of embodiment, when the first condenser 131 and the second condenser 132 are connected in series or in parallel, the control method of the fresh-keeping box further comprises the following steps: obtaining the condensing temperature of the refrigeration system 1; and selectively controlling at least one of the air supply amount of the fan 21 to the first condenser 131, the cooling capacity of the second energy storage unit to the second condenser 132, or the heating capacity of the second energy storage unit to the second condenser 132 according to the condensing temperature, so as to control the condensing temperature to be within the preset condensing temperature range.

[0140] Specifically, the method of obtaining the condensing temperature of the refrigeration system 1 is the same as the above embodiment, and the difference is only that the temperature of the refrigeration working medium can be obtained at the latter half of the first condenser 131, or at the outlet of the first condenser 131, or on the pipeline connected to the outlet of the first condenser 131, or at the latter half of the second condenser 132, or at the outlet of the second condenser 132, or on the pipeline connected to the outlet of the second condenser 132, and the condensing temperature is converted by the temperature of the refrigeration working medium.

[0141] The method adjusts the supply of cold and / or heat per unit of time by adjusting at least one of the supply of air, the supply of cold or the supply of heat, so as to control the condensing temperature of the refrigeration system 1 to be between 10°C and 80°C, or between 30°C and 60°C, or between 35°C and 45°C.

[0142] When the condensing temperature is lower than the set condensing temperature range, the supply of air is reduced, or the supply of cold is reduced, or the supply of heat is increased; when the condensing temperature is higher than the set condensing temperature range, the supply of air is increased, or the supply of cold is increased; the condensing temperature is adjusted to be within the preset condensing temperature range.

[0143] Specifically, when the condensing temperature is higher than the preset condensing temperature range, the adjustment of the supply of air is superior to the adjustment of the supply of cold of the second energy storage unit, that is, the supply of air is adjusted first, and if the expected result cannot be achieved, the supply of cold of the second energy storage unit is adjusted.

[0144] Preferably, when the condensing temperature is higher than the preset condensing temperature range, the adjustment of the supply of air is superior to the adjustment of the supply of cold of the second energy storage unit, that is, the supply of air to the first condenser 131 is first increased, and if the demand still cannot be met, the second transmission pump 234 is started to provide cold to the second condenser 132.

[0145] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, it means that the cooling is excessive, and at this time, the adjustment of the supply of cold of the second energy storage unit is prior to the adjustment of the supply of air, so that the condensing temperature can quickly respond to changes to be within the preset condensing temperature range.

[0146] Specifically, when the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, it is first determined whether the second energy storage unit is cooling, if yes, the supply of cold of the second energy storage unit is reduced; if no, the supply of air of the fan is reduced.

[0147] Further, when the supply of air of the fan is reduced to 0, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the second energy storage unit is started to provide heat to the second condenser, so as to maintain the condensing temperature within the preset condensing temperature range.

[0148] When the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is lower than the preset ambient temperature range, the adjustment of the supply of air of the fan is superior to the adjustment of the supply of heat of the second energy storage unit.

[0149] Specifically, it is determined whether the fan is running, if yes, the supply of air is reduced to zero; if no, the second energy storage unit is started to provide heat.

[0150] Further, when the supply of air is reduced to 0, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the second energy storage unit is started to provide heat to the second condenser.

[0151] Furthermore, in an embodiment with a first energy storage unit 22, the first energy storage unit 22 can also be turned on to provide cooling to the air flowing to the first condenser 131.

[0152] The air supply volume is adjusted by the number of operating fans 21 and the rotational speed of the fans 21. Furthermore, the first energy storage unit 22 can be activated to provide cooling to the air flowing to the first condenser 131.

[0153] Furthermore, it is preferable to place the condenser assembly 13 on the outside of the food storage box. During transportation, natural airflow over the condenser assembly 13 can cool it down. Even without a fan, this is equivalent to the function of turning on the fan 21 in the first embodiment. However, when the food storage box is stationary, the temperature management module 2 needs to be activated. Preferably, the fan 21 is located in front of the condenser fan 21, and the fan 21 can be turned on simultaneously during operation.

[0154] In addition, in the second, third and fourth embodiments with water-cooled second condenser 132 described above, the energy supply unit may also directly transfer the cooling capacity of the second evaporator 152 to the condensing assembly 13 without storing it.

[0155] like Figure 12 As shown, in the fourth embodiment, the energy supply unit includes a connecting pipe 24 connecting the second fluid channel and the refrigerant channel, a connecting pump 25 connected to the connecting pipe 24, and refrigerant located in the refrigerant channel, the connecting pipe 24, and the second fluid channel. The connecting pump 25 is communicatively connected to the temperature control unit, driving the refrigerant to circulate and transfer the cooling capacity of the second evaporator 152 to the second condenser 132.

[0156] Correspondingly, the present invention also provides a fourth control method for a food storage box, based on or used in the fourth embodiment. The difference between this method and the first and second control methods for the food storage box described above lies only in the switching control of the refrigeration system and the cooling method for supplying cooling to the condenser assembly 13; all other aspects are the same and will not be described in detail here.

[0157] The fourth method for controlling the food storage box includes: obtaining the storage temperature inside the storage box 100, determining whether the storage temperature is within the preset storage temperature range; if yes, turning on the refrigeration system 1 and providing cooling capacity to the storage box 100 through the first evaporator 151; if no, turning off the refrigeration system 1.

[0158] When the refrigeration system 1 is running, it is determined whether the condensing temperature of the refrigeration system 1 is higher than the preset condensing temperature range, if yes, the second evaporator 152 connected in parallel with the first evaporator 151 is used to provide cold energy to the condensing assembly 13; if no, the refrigeration working medium is cut off from flowing through the second evaporator 152.

[0159] When the condensing temperature is higher than the preset condensing temperature range, the second condenser 132 needs to be provided with cold energy, the refrigeration working medium is controlled to flow through the second evaporator 152, and the communication pump 24 is turned on; when the condensing temperature is not higher than the preset condensing temperature range, the second condenser 132 does not need to be provided with cold energy, the refrigeration working medium is cut off from flowing through the second evaporator 152, and / or the communication pump 24 is turned off.

[0160] In the method, the condensing assembly is heated by the energy supply unit, and specific reference can be made to the above description.

[0161] In summary, when the condensing temperature of the refrigeration system 1 is detected to be out of the preset condensing temperature range, the condenser is provided with cold energy or heat by the energy supply unit, the condensing temperature is adjusted to be within the preset temperature range, and the refrigeration system 1 can be ensured to run normally or to be in the best running state under any working condition.

[0162] The above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application.

Claims

1. A control method of a fresh-keeping box, characterized by, The method comprises the following steps: obtaining the storage temperature in the storage tank in the running state of the refrigeration system, judging whether the storage temperature is in the preset storage temperature range; if yes, ending the first evaporator providing cold energy to the storage tank, and providing cold energy to the energy supply unit through the second evaporator connected in parallel with the first evaporator; if no, providing cold energy to the storage tank through the first evaporator, ending the second evaporator providing cold energy to the energy supply unit, or providing cold energy to the storage tank through the first evaporator and providing cold energy to the energy supply unit through the second evaporator; When the ambient temperature is lower than the preset ambient temperature range, the energy supply unit is heated by a solar water heater or a waste heat source; whether the condensing temperature of the refrigeration system exceeds the preset condensing temperature range is judged, if yes, the energy supply unit is started to provide cold energy or heat to the condensing assembly; if no, the provision of cold energy or heat to the condensing assembly is ended; According to the condensing temperature, at least one of the air supply amount of the first condenser by the fan, the cold energy supply amount of the second condenser by the energy supply unit, and the heat energy supply amount of the second condenser by the energy supply unit is selectively controlled, and the condensing temperature is adjusted to 10-80℃.

2. The control method of the fresh food box according to claim 1, characterized in that: The refrigeration system comprises a refrigeration circuit and a refrigeration working medium located in the refrigeration circuit, the refrigeration circuit comprises a compressor, a condensing assembly, a throttling element and an evaporator connected in sequence through pipelines, and the evaporator comprises the first evaporator and the second evaporator; The first evaporator directly provides cold energy to the storage tank, and the method for providing cold energy to the storage tank is to control the refrigeration working medium to flow through the first evaporator; the method for ending the provision of cold energy to the storage tank is to cut off the refrigeration working medium flowing through the first evaporator; Or, the first evaporator provides cold energy to the storage tank through the first cold energy supply unit, the method for providing cold energy to the storage tank is to control the refrigeration working medium to flow through the first evaporator, and the first cold energy supply unit is turned on; the method for ending the provision of cold energy to the storage tank is to cut off the refrigeration working medium flowing through the first evaporator and / or turn off the first cold energy supply unit.

3. The control method of the fresh food box according to claim 1, characterized in that: The refrigeration system comprises a refrigeration circuit and a refrigeration working medium located in the refrigeration circuit, the refrigeration circuit comprises a compressor, a condensing assembly, a throttling element and an evaporator connected in sequence through pipelines, and the evaporator comprises the first evaporator and the second evaporator; The second evaporator directly provides cold energy to the energy supply unit, and the method for providing cold energy to the energy supply unit is to control the refrigeration working medium to flow through the second evaporator; the method for ending the provision of cold energy to the energy supply unit is to cut off the refrigeration working medium flowing through the second evaporator; Or, when the second evaporator provides cold energy to the energy supply unit through the second cold energy supply unit, the method for providing cold energy to the energy supply unit is to control the refrigeration working medium to flow through the second evaporator, and the second cold energy supply unit is turned on; the method for ending the provision of cold energy to the energy supply unit is to cut off the refrigeration working medium flowing through the second evaporator and / or turn off the second cold energy supply unit.

4. The control method of the fresh food box according to claim 1, characterized in that: Further comprising the steps of: judging whether the energy supply unit reaches the preset energy storage range, if not, providing cold energy to the energy supply unit directly or indirectly through the second evaporator; if yes, ending the second evaporator providing cold energy to the energy supply unit.

5. The control method of the fresh food box according to claim 1, characterized in that: Further comprising the steps of: judging whether the energy supply unit reaches the preset energy storage range, judging whether the storage temperature reaches the preset storage temperature range, if at least one of the aforementioned judgments is no, starting the refrigeration system; If both of the aforementioned judgments are yes, closing the refrigeration system.

6. The control method of the fresh-keeping box according to any one of claims 1 to 5, characterized in that: The condensing temperature is adjusted to 30-60℃.

7. The control method of the fresh-keeping box according to any one of claims 1 to 5, characterized by: The condensing temperature is adjusted to 35-45℃.

8. A control method of a fresh-keeping box, characterized by, Further comprising the steps of: obtaining the storage temperature in the storage box, judging whether the storage temperature is in the preset storage temperature range; if yes, starting the refrigeration system, providing cold energy to the storage box through the first evaporator, if no, closing the refrigeration system; And, when the refrigeration system is running, judging whether the condensing temperature of the refrigeration system is higher than the preset condensing temperature range, if yes, providing cold energy to the condensing assembly through the second evaporator arranged in parallel with the first evaporator; if no, cutting off the refrigeration working medium flowing through the second evaporator; The second evaporator comprises a refrigerant channel and a carrier fluid channel, the refrigerant channel is connected between the throttling element and the compressor; the condensing assembly comprises a first fluid channel and a second fluid channel, the first fluid channel is connected between the compressor and the throttling element; The second evaporator provides cold energy to the condensing assembly through the energy supply unit, the energy supply unit comprises a communication pipe communicating the second fluid channel and the carrier fluid channel, a communication pump connected to the communication pipe, carrier fluid in the carrier fluid channel and the communication pipe and the second fluid channel; when the condensing temperature is higher than the preset condensing temperature range, the refrigeration supply is controlled to flow through the second evaporator, and the communication pump is started; when the condensing temperature is not higher than the preset condensing temperature range, the refrigeration working medium is cut off to flow through the second evaporator, and / or the communication pump is closed.

9. The control method of the fresh food box according to claim 8, characterized in that: The energy supply unit further comprises an energy storage unit, judging whether the condensing temperature of the refrigeration system exceeds the preset condensing temperature range, if yes, starting the energy supply unit to provide cold energy or heat to the condensing assembly, adjusting the condensing temperature to 10-80℃; if no, ending the provision of cold energy or heat to the condensing assembly.

10. The control method of the fresh food box according to claim 9, characterized in that: The condensing temperature is adjusted to 30-60℃.

11. The control method of the fresh food box according to claim 9, characterized in that: The condensing temperature is adjusted to 35-45℃.

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