Condensation temperature management method

Abstract

The application provides a condensing temperature management method, comprising the following steps: obtaining a condensing temperature of a refrigeration system, wherein the refrigeration system comprises a first condenser and a second condenser connected in series or in parallel; and selectively controlling at least one of an air supply amount of a fan to the first condenser, a cold supply amount of an energy storage unit to the second condenser, or a heat supply amount of the energy storage unit to the second condenser according to the condensing temperature. The application controls the condensing temperature in a reasonable range by regulating the condensing effects of the first condenser and the second condenser, so that the refrigeration system can still operate normally or maintain an optimal operating state under any working condition.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a condensing temperature management method. BACKGROUND

[0002] The refrigeration system composed of a compressor, a condenser, a throttling element and an evaporator is the most commonly used refrigeration system. However, the temperature varies in different seasons and at different time of a day, and the temperature difference between day and night is large in some areas. In combination with the diversified use scenarios of the refrigeration system, the working condition is more complex and diversified. In addition, the efficiency of the compressor is different under different working conditions, and even in some harsh environments with ultra-high or ultra-low temperature, the compressor is damaged or cannot work.

[0003] Therefore, it is necessary to provide a condensing temperature management method to solve the above problems. SUMMARY

[0004] The purpose of the present application is to provide a condensing temperature management method to ensure that the refrigeration system can still operate normally or maintain the best operating state under any working condition.

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

[0006] A condensing temperature management method, comprising the following steps: obtaining the condensing temperature of a refrigeration system, wherein the refrigeration system comprises a first condenser and a second condenser connected in series or in parallel; and selectively controlling at least one of the air supply amount of a fan to the first condenser, the cooling amount of an energy storage unit to the second condenser, or the heating amount of the energy storage unit to the second condenser according to the condensing temperature.

[0007] Further, the obtaining of the condensing temperature of the refrigeration system comprises:

[0008] obtaining the pressure of the refrigeration working medium between the outlet of the compressor and the inlet of the throttling element, and converting the condensing temperature according to the pressure;

[0009] and / or, obtaining the temperature of the refrigeration working medium at the latter half of the first condenser, or at the outlet of the first condenser, or on the pipeline connected with the outlet of the first condenser, or at the latter half of the second condenser, or at the outlet of the second condenser, or on the pipeline connected with the outlet of the second condenser, and converting the condensing temperature according to the temperature;

[0010] and / or, obtaining the ambient temperature, and converting the condensing temperature according to the ambient temperature.

[0011] Further, by adjusting at least one of the air supply amount, the cooling amount or the heating amount, the condensing temperature of the refrigeration system is controlled to be between 10℃ and 80℃, or between 30℃ and 60℃, or between 35℃ and 45℃.

[0012] Further, when the condensing temperature is higher than the preset condensing temperature range, the adjustment of the air supply quantity is superior to the adjustment of the cooling capacity of the energy storage unit.

[0013] Further, when the condensing temperature is lower than the preset condensing temperature range and the ambient temperature is higher than the preset ambient temperature range, the adjustment of the cooling capacity of the energy storage unit is superior to the adjustment of the air supply quantity.

[0014] Further, when the ambient temperature is higher than the preset ambient temperature range, it is determined whether the energy storage unit is providing cooling, if yes, the cooling capacity of the energy storage unit is reduced, if no, the air supply quantity of the fan is reduced.

[0015] Further, 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 quantity of the fan is superior to the adjustment of the heating capacity of the energy storage unit.

[0016] Further, it is determined whether the fan is running, if yes, the air supply quantity is reduced to zero, if no, the energy storage unit is started to provide heat.

[0017] Further, when the air supply quantity is reduced to zero, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the energy storage unit is started to provide heat for the second condenser.

[0018] Further, the air supply quantity is adjusted by the number of times the fan works and the rotating speed of the fan.

[0019] Further, the method further comprises the following steps: starting the first energy storage unit to provide cooling or heating for the air flowing to the first condenser; the first energy storage unit comprises a first energy storage container, a first energy storage material in the first energy storage container, a heat sink, a first output pipe connecting the first energy storage container and the inlet of the heat sink, a first return pipe connecting the outlet of the heat sink and the first energy storage container, and a first transmission pump connected to the first output pipe or the first return pipe, the heat sink is located on the air inlet side of the first condenser, and the phase change temperature of the first energy storage material is-80℃-45℃ or-40℃-30℃.

[0020] Further, the second condenser comprises a first fluid passage and a second fluid passage, the first fluid passage is connected between the outlet of the compressor and the inlet of the throttling element;

[0021] The energy storage unit comprises an energy storage container, an energy storage material in the energy storage container, an output pipe connecting the energy storage container and the inlet of the second fluid channel, a backflow pipe connecting the outlet of the second fluid channel and the energy storage container, a transmission pump connected to the output pipe or backflow pipe, and the supply of cold or heat is controlled by controlling the supply amount of the energy storage material per unit time by the transmission pump; the phase change temperature of the energy storage material is -80℃-45℃ or -40℃-30℃.

[0022] The present application has the following advantages: by selectively controlling at least one of the air supply amount of the fan to the first condenser, the cold supply amount of the energy storage unit to the second condenser, or the heat supply amount of the energy storage unit to the second condenser, the condensation effect of the first condenser and the second condenser is regulated, the condensation temperature is controlled within a reasonable range, and the refrigeration system can still operate normally or maintain the best operating state under any working condition. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a schematic diagram of a condensation temperature management system of a preferred embodiment of the present application;

[0024] Figure 2 is a schematic diagram of a condensation temperature management system of another preferred embodiment of the present application;

[0025] Figure 3 is a schematic diagram of a condensation temperature management system of another preferred embodiment of the present application;

[0026] Figure 4 is a schematic diagram of a condensation temperature management system of another preferred embodiment of the present application;

[0027] Figure 5 is a schematic diagram of a condensation temperature management system of another preferred embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a condensation temperature management system of another preferred embodiment of the present application;

[0029] Figure 7 is a schematic diagram of the energy storage material being charged by the refrigeration system for charging in a preferred embodiment of the present application;

[0030] Figure 8 is a schematic diagram of the energy storage material being charged by the refrigeration system for charging in another preferred embodiment of the present application;

[0031] Figure 9 is a schematic diagram of a condensation temperature management system of a specific embodiment of the present application;

[0032] Figure 10 is Figure 9 a schematic diagram from another angle;

[0033] Figure 11 This is a schematic diagram of a condensation temperature management system according to another specific embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram of a condensation temperature management method according to an embodiment of the present invention;

[0035] Figure 13 This is a schematic diagram of a food storage box according to a preferred embodiment of the present invention;

[0036] Figure 14 for Figure 13 A diagram from another angle;

[0037] Figure 15 for Figure 13 Exploded view;

[0038] Figure 16 for Figure 15 A schematic diagram showing the coordination between the refrigeration system and the condensing temperature management system in the diagram;

[0039] Figure 17 This is a schematic diagram of a food storage box according to a preferred embodiment of the present invention;

[0040] Figure 18 for Figure 17 Exploded view;

[0041] Figure 19 for Figure 17 A diagram from another angle. Detailed Implementation

[0042] 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.

[0043] Please see Figures 1-11 As shown, the condensing temperature management system 100 of the present invention includes a refrigeration system 1 and a condensing temperature management module 2. The condensing temperature management module 2 is used to provide cooling and / or heating to the refrigeration system 1 to maintain its condensing temperature within a preset condensing temperature range, thereby ensuring the normal operation of the entire system and its efficient refrigeration performance.

[0044] The refrigeration system 1 includes a refrigeration circuit 11 and a refrigerant located within the refrigeration circuit 11. The refrigeration circuit includes a compressor 12, a condenser assembly 13, a throttling element 14, and an evaporator 15 connected in sequence by pipes. The refrigeration system 1 may also include common components such as an oil separator, which will not be listed here; the working principle of refrigeration will also not be described in detail.

[0045] The condensing temperature management module 2 comprises a sensor for detecting the condensing temperature of the refrigeration system 1, an energy supply unit for providing cold and / or heat to the condensing assembly 13, and a temperature control unit in communication connection with the sensor and the energy supply unit. The "providing cold and / or heat" means that cold can be provided, or heat can be provided, or both cold and heat can be provided, but the cold and heat are provided under different conditions, and not at the same time.

[0046] The temperature control unit controls the cold or heat provided by the energy supply unit to the condensing assembly 13 according to the detection result of the sensor. Those skilled in the art can understand that "providing cold" means providing a medium with a lower temperature to the condensing assembly 13, for example, providing cold to the condensing assembly 13 by driving air with a lower temperature than the condensing assembly 13 by a fan; "providing heat" means providing a medium with a higher temperature to the condensing assembly 13, for example, providing heat to the condensing assembly by driving air with a higher temperature than the condensing assembly 13 by a fan.

[0047] 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 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 cold supply, or stops the cold supply, or provides heat to the condensing assembly 13; the condensing temperature is controlled within the preset condensing temperature range, so as to ensure that the refrigeration system 1 can normally operate or maintain the best operating state under any working condition. 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℃.

[0048] Specifically, the condensing temperatures of different refrigeration working media are different, as shown in Table 1.

[0049] Table 1 Normal working condensing temperature and optimal working condensing temperature of different refrigeration working media

[0050]

[0051] The sensor directly or indirectly detects the condensing temperature of the refrigeration system 1, including but not limited to the following:

[0052] 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.

[0053] In another embodiment, the sensor comprises a temperature sensor for acquiring the temperature of the refrigerant, which is arranged at the latter 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 refrigerant collected thereby is basically the same as or slightly different from the condensing temperature, which can be approximately regarded 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 that the temperature sensor is arranged at the latter half of the condensing assembly 13 or at the outlet of the condensing assembly 13.

[0054] 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 where 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 that the condensing temperature is also high.

[0055] 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.

[0056] The energy supply unit is used to provide cold and / or heat to the condensing assembly 13, which is specifically designed according to the specific structure of the condensing assembly 13.

[0057] In the first embodiment, as shown in FIG. 1, the condensing assembly 13 comprises a first condenser 131 of air-cooled type, which comprises a condensing pipe and preferably further comprises heat dissipation fins for increasing the heat exchange area and improving the heat exchange performance. Figures 1-3

[0058] Correspondingly, the energy supply unit comprises at least one fan 21 arranged on one side of the first condenser 131, which is in communication connection with the temperature control unit. Preferably, the first condenser 131 is located on the air suction side of the fan 21, and air uniformly passes through the first condenser 131, so that the heat exchange performance is good.

[0059] When the number of the fans 21 is at least two, all the fans 21 are located on the same side of the first condenser 131, so as to avoid the formation of internal vortex at the first condenser 131, which is not conducive to heat dissipation.

[0060] The temperature control unit controls the rotating speed of the fan 21 to be adjusted between 0 and 100% according to the detected condensing temperature, so as to control the cooling capacity by the amount of air supply per unit time. When the rotating speed is 0, the fan 21 is in the closed state; when the rotating 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 rotating speed of the fan 21 is increased, and the air supply per unit time is increased; when the condensing temperature is reduced, the rotating speed of the fan 21 is reduced or the fan 21 stops working.

[0061] Preferably, the energy supply unit further comprises a first energy storage unit 22, which comprises a first energy storage container 221, a first energy storage material arranged in the first energy storage container 221, a heat sink 222, a first output pipe 223 connected to the inlet of the first energy storage container 221 and the heat sink 222, a first return pipe 224 connected to 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, which is in communication connection with the temperature control unit.

[0062] The energy storage material is matched according to the working environment of the refrigeration system 1. If the working environment is usually 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 usually a low-temperature environment, a first energy storage material with a higher temperature or a higher phase change temperature is matched.

[0063] ​Preferably, the phase change temperature of the first energy storage material is -80°C to 45°C, preferably -40°C to 30°C. The first condenser 131 can be provided with cold energy to cool it down at high temperature, and provided with heat to warm it up at low temperature; at this time, the 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, which operate independently.

[0064] Reference Figures 1-3 、 Figures 5-6 As shown by the arrow, along the direction of the air flow passing through the first condenser 131, the heat sink 222 is located at the air inlet side of the first condenser 131. Specifically, when the first condenser 131 is located at the air suction side of the fan 21, the heat sink 222 is located at the side of the first condenser 131 away from the fan 21; when the first condenser 131 is located at the air outlet side of the fan 21, the heat sink 222 is located between the first condenser 131 and the fan 21, or at the air suction side of the fan 21.

[0065] Generally, the condensation temperature is adjusted only by controlling the rotating speed of the fan 21; and in special working conditions, when the condensation temperature cannot be adjusted to the appropriate condensation temperature range only by the air volume, 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, and the fan 21 blows the air after heat exchange with the heat sink 222 to the first condenser 131 to provide cold energy or heat energy for it.

[0066] 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.

[0067] The second condenser 132 includes but is not limited to: a plate heat exchanger (as shown in Figures 9-11 ), a shell-and-tube condenser, a double-pipe condenser, as long as a heat exchanger that can provide two fluid passages for heat exchange can be used as the second condenser 132.

[0068] 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 the same or two.

[0069] 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 or heat for the refrigerant.

[0070] The second energy storage material is selected in the same matching manner as the first energy storage material, which will not be repeated here.

[0071] 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 or heat for the first condenser 131 as described in the first type of embodiment, and to provide cold or heat for 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.

[0072] The inventor found in further research that the medium for providing cold or heat for the first condenser 131 by the fan 21 is air without pollution and without the need for post-processing; the medium for providing cold or heat for 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.

[0073] In one embodiment, the outlet of the first condenser 131 is in communication with the inlet of the first fluid passage. The working environment of the refrigeration system 1 is relatively mild, and in most cases, the air-cooled first condenser 131 can control the condensing temperature within the preset condensing temperature range. For example, the first condenser 131 provides cold to the condensing assembly 13. The high-temperature and high-pressure refrigerant 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 to the second condenser 132. If the preset condensing temperature range is not reached, the second energy storage unit 23 is started to supplement a portion of the cold to the second condenser 132, thereby saving energy as a whole.

[0074] 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. The temperature of the refrigerant after passing through the first condenser 131 located upstream is determined in time, and it is determined 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.

[0075] In another embodiment, the inlet of the first condenser 131 is in communication with the outlet of the first fluid passage. In the case of a relatively harsh working environment of the refrigeration system 1, such as a high temperature all year round or in the vicinity of the equator. The use process is opposite to the above-mentioned embodiment.

[0076] 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 refrigerant after passing through the second condenser 132 located upstream is determined in time, and it is determined 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.

[0077] In the 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.

[0078] In the above four types of embodiments, the first energy storage unit 22 and the second energy storage unit 23 are collectively referred to as energy storage units, and except that the first energy storage unit 22 has a radiator 222, the rest of the structure is basically the same.

[0079] Further, the energy storage unit is a unit that can continuously add cold or heat. For the convenience of description, the first energy storage container 221 and the second energy storage container 231 are collectively referred to as an energy storage container 221 (231), and the first energy storage material and the second energy storage material are collectively referred to as an energy storage material. The way of continuously adding cold or heat includes but is not limited to the following ways:

[0080] For example, the energy storage container 221 (231) includes a filling port 226, and the energy storage material includes solid and / or liquid energy storage material added into the energy storage container from the filling port 226. The energy storage material can be water, brine, alcohol solution, etc.

[0081] Alternatively, the energy storage container includes a filling port 226, and the energy storage unit further includes a secondary energy storage device added into the energy storage container from the filling port 226. The secondary energy storage device includes a secondary energy storage container and a secondary energy storage material sealed in the secondary energy storage container. The secondary energy storage material releases cold or heat to the energy storage material, and then provides cold or heat to the first condenser 131 or the second condenser 132 through the energy storage material. The secondary energy storage container after releasing energy can be taken out at the filling port 226; or a discharge port for taking out the secondary energy storage container can be provided on the energy storage container.

[0082] Based on the above two embodiments, the energy storage container 221 (231) further includes a discharge port (not shown) for discharging the energy storage material to the outside, facilitating cleaning of the energy storage container or replacing the energy storage material when the working condition changes.

[0083] Please refer to Figures 9-10 The first condenser 131 and the second condenser 132 can be connected in series or parallel, and the connection mode of the two is omitted here. Among them, the first energy storage container 221 and the second energy storage container 231 are combined into the same energy storage container, and the first transmission pump 225 and the second transmission pump 234 are the same transmission pump; the first output pipe 223 and the second output pipe 232 are connected in parallel with the water outlet of the transmission pump, and the first return pipe 223 and the second return pipe 233 are connected after being connected in parallel to the energy storage container.

[0084] Further, the heat sink 222 is formed by connecting a plurality of heat dissipation pipes, and the heat dissipation pipes and the condensing pipes of the first condenser 131 are integrally arranged as one body. Specifically, the heat dissipation pipes are located on the air inlet side of the condensing pipes of the first condenser 131.

[0085] Or, the energy storage container 221 (231) further comprises a charging inlet 227 and a discharging outlet 228 for connecting with a charging or heating machine for providing energy storage material. When cooling is needed, the charging machine charges the low-temperature energy storage material through the charging inlet 227, and then discharges the energy storage material with higher temperature in the energy storage container 221 (231) through the discharging outlet 228, so as to directly replace the energy storage material with higher temperature in the energy storage container 221 (231) with the low-temperature energy storage material, thereby achieving fast cooling. Alternatively, when heating is needed, the charging machine charges the high-temperature energy storage material through the charging inlet 227 and the discharging outlet 228, thereby achieving heating.

[0086] Or, the energy storage unit further comprises a pair of energy supplement interfaces for connecting with a charging or heating machine for providing coolant, and an energy supplement pipe connected between the pair of energy supplement interfaces. The energy supplement interfaces are arranged on the energy storage container 221 (231), and the energy supplement pipe is located in the energy storage container 221 (231). When cooling is needed, the charging machine provides low-temperature coolant through the pair of energy supplement interfaces, and the coolant exchanges heat with the energy storage material when flowing in the energy supplement pipe. When heating is needed, the charging machine charges high-temperature coolant through the pair of energy supplement interfaces, thereby achieving heating.

[0087] In the above two embodiments, the charging machine is a common cooling machine, and the difference lies in that the provided coolant medium is different. One provides cold energy storage material, and the other provides coolant different from the energy storage material. The heating machine is a common heating machine, and the difference lies in that the provided heating medium is different. One provides hot energy storage material, and the other provides coolant different from the energy storage material. The provided coolant and the energy storage material are both common coolant medium. The present application only distinguishes the two structures in name, and the two structures can be the same or different. Moreover, the charging machine and the heating machine both refer to the prior art.

[0088] Please refer to Figure 11 , which is another specific embodiment of the present application, and Figure 9 The difference lies in that the energy storage container 221 (231) is provided with a charging inlet 227 and a discharging outlet 228, and other details are not described herein.

[0089] Or, as shown in Figure 7 and Figure 8 , the energy supply unit further comprises a refrigeration system 24 for providing cold energy to the energy storage material. Specifically, the refrigeration system 24 for charging comprises a compressor 241 for charging, a condenser 242 for charging, a throttling element 243 for charging, and an evaporator 244 for charging.

[0090] The cold-charging evaporator 244 provides cold to the energy storage material in the following ways, but not limited to: the cold-charging evaporator 244 is immersed in the energy storage container; or, the cold-charging evaporator 244 includes a refrigerant channel connected between the cold-charging throttling element 243 and the cold-charging compressor 241, an energy storage material channel in communication with the energy storage container through a cold-charging connection pipe 25, and the energy supply unit further includes a first cold-charging pump 26 connected to the cold-charging connection pipe 25.

[0091] Or, the cold-charging evaporator 244 includes a refrigerant channel and a cold carrier channel, the refrigerant channel is connected between the cold-charging throttling element 243 and the cold-charging compressor 241; the energy supply unit further includes a pair of cold-charging interfaces arranged on the energy storage container, a cold-charging pipe 27 connected between the pair of cold-charging interfaces, a cold-charging circulation pipe 28 connected between the pair of cold-charging interfaces and the two ends of the cold carrier channel, a second cold-charging pump 29 connected to the cold-charging circulation pipe 28, and a cold carrier circulating in the cold carrier channel and the cold-charging circulation pipe 28 and the cold-charging pipe 27. Of course, as in an air conditioner, the flow direction of the refrigeration working fluid can be changed by connecting an electromagnetic four-way valve at the inlet and outlet of the compressor, the original evaporator can be changed to a condenser, and the original condenser can be changed to an evaporator, at this time, heat can be provided to the energy storage material.

[0092] In addition, the first transmission pump 225 and the second transmission pump 234 are preferably variable frequency pumps, which facilitate the adjustment of the supply amount of energy storage material per unit time. The first cold-charging pump 26 and the second cold-charging pump 29 are preferably variable frequency pumps, which facilitate the adjustment of the speed of supplementing cold or heat to the energy storage material.

[0093] The application also provides a condensation temperature management method, which is based on or used for the first type of embodiment with only the air-cooled first condenser, and mainly adjusts the condensation temperature 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.

[0094] The condensation temperature management method includes the following steps: obtaining the condensation 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 cold supply amount of the first energy storage unit 22, or the heat supply amount of the first energy storage unit 22 according to the condensation temperature, so as to control the condensation temperature within a preset condensation temperature range, for example, between 10℃ and 80℃, or between 30℃ and 60℃, or between 35℃ and 45℃.

[0095] Specifically, the condensing temperature of the refrigeration system 1 is obtained by the following methods, including but not limited to: 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 rear half of the first condenser 131, at the outlet of the first condenser 131, or on the pipeline connected to 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; generally, the temperature of the air inlet side of the air-cooled condenser is obtained to roughly estimate the condensing temperature.

[0096] 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.

[0097] 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; the condensing temperature is adjusted to be within the preset condensing temperature range.

[0098] 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 be met, the first energy storage unit is started to provide cooling.

[0099] 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 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 be within the preset condensing temperature range.

[0100] 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 first energy storage unit is cooling, if yes, the cooling amount of the first energy storage unit is reduced; if not, the air supply amount of the fan is reduced.

[0101] 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, heat is provided by the first energy storage unit, and the fan is started at the same time, so that the condensing temperature is maintained within the preset condensing temperature range.

[0102] When the condensing temperature is lower than the preset condensing temperature range, the ambient temperature is lower than the preset ambient temperature range, and the air supply amount of the fan is adjusted to be superior to the heat supply amount of the first energy storage unit.

[0103] Specifically, it is judged whether the fan is running, if yes, the air supply amount is reduced to zero, if not, the first energy storage unit is started to provide heat, and the fan is started.

[0104] Further, the air supply amount is reduced to zero, and if the condensing temperature is still lower than the preset condensing temperature range within the preset time, the fan is started, and the first energy storage unit is started to provide heat.

[0105] 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.

[0106] The present application also provides a condensing temperature management method, which is based on or used for the second type of embodiment of the water-cooled second condenser, and mainly adjusts the condensing temperature by controlling the second energy storage unit 33 to provide cold or heat.

[0107] The condensing temperature management method comprises the following steps: obtaining the condensing temperature of the refrigeration system 1; and controlling the cold or heat supply amount of the second energy storage unit 33 according to the condensing temperature, so as to control the condensing temperature to be between 10℃ and 80℃, or between 30℃ and 60℃, or between 35℃ and 45℃, within the preset condensing temperature range.

[0108] 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 that the temperature of the refrigeration working medium is obtained at the second half of the second condenser 132, or at the outlet of the second condenser 132, or on the pipeline connected with the outlet of the second condenser 132.

[0109] When the condensing temperature is lower than the preset condensing temperature range, the ambient temperature is lower than the preset ambient temperature range, and the air supply amount of the fan is adjusted to be superior to the heat supply amount of the first energy storage unit.

[0110] 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. It is judged whether the second energy storage unit is providing cooling, if yes, the cooling amount of the second energy storage unit is reduced to zero, if not, heat is provided by the second energy storage unit.

[0111] 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.

[0112] When the condensing temperature is higher than the preset condensing temperature range, the cooling amount is increased, and the condensing temperature is adjusted to be within the preset condensing temperature range.

[0113] In addition, please refer to Figure 12 As shown in the above embodiments, the present application also provides a condensing temperature management method, based on or for the condensing temperature management system 100 of the third or fourth embodiment. When the first condenser 131 and the second condenser 132 are connected in series or in parallel, the condensing temperature management method 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 first condenser 131 by the fan 21, the cold supply amount of the second condenser 132 by the second energy storage unit, or the heat supply amount of the second condenser 132 by the second energy storage unit, so as to control the condensing temperature within the preset condensing temperature range.

[0114] Specifically, the obtaining of the condensing temperature of the refrigeration system 1 is the same as the above embodiments, 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.

[0115] The method adjusts the supply amount of cold and / or heat per unit time by adjusting at least one of the air supply amount, the cold supply amount, or the heat supply amount, so as to control the condensing temperature of the refrigeration system 1 to be between 10℃ and 80℃, or between 30℃ and 60℃, or between 35℃ and 45℃.

[0116] When the condensing temperature is lower than the set condensing temperature range, the air supply amount is reduced, or the cold supply amount is reduced, or the heat supply amount is increased; when the condensing temperature is higher than the set condensing temperature range, the air supply amount is increased, or the cold supply amount is increased; the condensing temperature is adjusted to be within the preset condensing temperature range.

[0117] 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 cold supply amount of the second energy storage unit, that is, the air supply amount is adjusted first, and if the expected value cannot be reached, the cold supply amount of the second energy storage unit is adjusted.

[0118] Preferably, 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 cold supply amount of the second 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 second transmission pump 234 is started to provide cold to the second condenser 132.

[0119] 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 cold supply amount of the second energy storage unit is prior to the adjustment of the air supply amount, so that the condensing temperature can quickly respond to changes to be within the preset condensing temperature range.

[0120] 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 providing cooling, and if so, the cooling capacity of the second energy storage unit is reduced; if not, the air supply of the fan is reduced.

[0121] Further, when the air supply 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 used to provide heat to the second condenser to maintain the condensing temperature within the preset condensing temperature range.

[0122] 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 air supply adjustment of the fan is superior to the heat supply adjustment of the second energy storage unit.

[0123] Specifically, it is determined whether the fan is running, and if so, the air supply is reduced to zero; if not, the second energy storage unit is started to provide heat.

[0124] Further, when the air supply 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.

[0125] Further, in the embodiment with the first energy storage unit 22, the first energy storage unit 22 can also be started to provide cold to the air flowing to the first condenser 131.

[0126] The condensing temperature management system 100 or the condensing temperature management method of the present application can be used in a fresh-keeping box with a storage box 200, and the evaporator 15 provides cold to the storage box 200 through a third cooling unit.

[0127] In an embodiment, the evaporator 15 includes a refrigerant channel and a secondary refrigerant channel, the refrigerant channel is connected between the throttling element 14 and the compressor 12; the third cooling unit includes a heat exchanger, a first circulation pipe connecting the secondary refrigerant channel and the heat exchanger, and a first circulation pump connected to the first circulation pipe, and the heat exchanger is located in the storage box 200, preferably at the top of the storage box 200.

[0128] In another embodiment, the evaporator 15 comprises a refrigerant passage and a secondary refrigerant passage, the refrigerant passage is connected between the throttling element 14 and the compressor 12; the third cooling unit comprises a heat exchanger, a first circulation pipe connecting the secondary refrigerant passage and the heat exchanger, a first circulation pump connected to the first circulation pipe, and a first fan driving air to circulate in the heat exchanger and the storage box 200. The heat exchanger is arranged in the storage box 200; or the heat exchanger is arranged outside the storage box 200, and air around the heat exchanger is circulated with the inside of the storage box 200 through air inlets on the storage box 200.

[0129] Of course, the evaporator 15 can also be arranged directly in the storage box 200, preferably at the top of the storage box 200; or cold air around or passing through the evaporator 15 is blown into the storage box 200 by a second fan.

[0130] The condensing assembly 13 is arranged outside the fresh-keeping box, and natural wind blows through the condensing assembly 13 during transportation of the fresh-keeping box, so as to cool the condenser; even if no fan is arranged, the effect of turning on the fan 21 in the first embodiment can be achieved. However, when the fresh-keeping box is stationary, the temperature management module 2 needs to be started.

[0131] Preferably, the fan 21 is arranged at the front side of the condensing fan 21, and the fan 21 can also be turned on simultaneously during operation.

[0132] Specifically, the fresh-keeping box can adopt Figures 9-11 the condensing temperature management system.

[0133] Please also refer to Figures 13-16 , and the difference between Figure 11 lies in that the refrigeration system only comprises the first condenser 131, and the condensing temperature management system supplies cold to the first condenser 131 through the first energy storage unit 22. The evaporator 15 of the refrigeration system is arranged in the storage box 200, and other structures are located outside the box body and are protected by the outer cover 201. The outer cover 201 is provided with an air inlet window 202 corresponding to the first condenser 131, and is also provided with an inlet 203 and an outlet 204 corresponding to the charging inlet 227 and the discharge outlet 228, respectively.

[0134] Please also refer to Figures 17-19 , and the difference between Figures 9-11 lies in that the refrigeration system only comprises the first condenser 131, and the condensing temperature management system supplies cold to the first condenser 131 through the second energy storage unit 23, and the outer cover 201 of the refrigeration system is provided with an opening 205 corresponding to the charging port 226.

[0135] To sum up, the condensing temperature management system 100 and method of the present application, when detecting that the condensing temperature of the refrigeration system 1 exceeds the preset condensing temperature range, the energy supply unit provides cold or heat to the condenser, adjusts the condensing temperature to the preset condensing temperature range, and ensures that the refrigeration system 1 can normally operate or maintain the best operating state under any working condition.

[0136] In the present application, A is located between B and C, only representing the position relationship of A / B / C, B and C can include other elements or be directly connected. For example, the pressure sensor is located between the outlet of the compressor and the inlet of the throttling element, including the pressure sensor located at the two endpoints of the outlet of the compressor and the inlet of the throttling element, and also including the pressure sensor located in the connecting pipe connecting the two; of course, the connecting pipe can also include oil separation, check valve, solenoid valve, condenser, liquid accumulator and the like. Other details are not described here.

[0137] The above examples are only used to illustrate the technical solutions of the present application and not to limit it. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A condensation temperature management method characterized by, The method comprises the following steps: obtaining a condensing temperature of a refrigeration system, the refrigeration system comprising a first condenser and a second condenser connected in series or in parallel; selectively controlling at least one of an air supply amount of a fan to the first condenser, a cooling supply amount of an energy storage unit to the second condenser, or a heating supply amount of the energy storage unit to the second condenser according to the condensing temperature; when the condensing temperature is higher than a preset condensing temperature range, the air supply amount is adjusted in preference to the cooling supply amount of the energy storage unit; when the condensing temperature is lower than the preset condensing temperature range and an ambient temperature is higher than a preset ambient temperature range, the cooling supply amount of the energy storage unit is adjusted in preference to the air supply amount; and when the ambient temperature is higher than the preset ambient temperature range, it is determined whether the energy storage unit is supplying cooling; if yes, the cooling supply amount of the energy storage unit is reduced; and if no, the air supply amount of the fan is reduced; 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 air supply amount of the fan is adjusted in preference to the heating supply amount of the energy storage unit; it is determined whether the fan is operating; if yes, the air supply amount is reduced to zero; and if no, the energy storage unit is started to supply heat; when the air supply amount is reduced to zero, if the condensing temperature is still lower than the preset condensing temperature range within a preset time, the energy storage unit is started to supply heat to the second condenser; the air supply amount is adjusted by the number of times the fan operates and the rotating speed of the fan; the method further comprises the following steps: starting a first energy storage unit to supply cooling or heat to air flowing to the first condenser; the first energy storage unit comprises a first energy storage container, a first energy storage material in the first energy storage container, a heat sink, a first output pipe connecting an inlet of the first energy storage container and the heat sink, a first return pipe connecting an outlet of the heat sink and the first energy storage container, and a first transmission pump connected to the first output pipe or the first return pipe; the heat sink is located at an air inlet side of the first condenser; and the phase change temperature of the first energy storage material is -80℃ to 45℃.

2. The condensing temperature management method of claim 1, wherein: The refrigeration system comprises a refrigeration circuit and a refrigeration working medium in the refrigeration circuit; the refrigeration circuit comprises a compressor, a condensing assembly, a throttling element and an evaporator connected in sequence by pipelines; the method of obtaining the condensing temperature of the refrigeration system comprises: obtaining the pressure of the refrigeration working medium between the outlet of the compressor and the inlet of the throttling element, and converting the condensing temperature according to the pressure; and / or, obtaining the temperature of the refrigeration working medium at the second half of the first condenser, at the outlet of the first condenser, on the pipeline connected to the outlet of the first condenser, at the second half of the second condenser, at the outlet of the second condenser, or on the pipeline connected to the outlet of the second condenser, and converting the condensing temperature according to the temperature; and / or, obtaining the ambient temperature, and converting the condensing temperature according to the ambient temperature.

3. The condensing temperature management method of claim 1, wherein: The condensing temperature of the refrigeration system is controlled to be between 10℃ and 80℃ by adjusting at least one of the air supply amount, the cooling supply amount or the heating supply amount.

4. The condensing temperature management method of claim 3, wherein: The condensing temperature of the refrigeration system is controlled to be between 30℃ and 60℃.

5. The condensing temperature management method of claim 3, wherein: The condensing temperature of the refrigeration system is controlled to be between 35℃ and 45℃.

6. The condensing temperature management method of claim 1, wherein: The phase change temperature of the first energy storage material is -40℃ to 30℃.

7. The condensing temperature management method of claim 1, wherein: The second condenser comprises a first fluid passage and a second fluid passage, the first fluid passage being connected between the outlet of the compressor and the inlet of the throttling element; The energy storage unit comprises an energy storage container, an energy storage material in the energy storage container, an output pipe connecting the energy storage container with the inlet of the second fluid passage, a backflow pipe connecting the outlet of the second fluid passage with the energy storage container, and a transmission pump connected to the output pipe or the backflow pipe, the supply of the energy storage material per unit time being controlled by the transmission pump to control the cooling or heating capacity; the phase change temperature of the energy storage material is -80℃ to 45℃.

8. The condensing temperature management method of claim 7, wherein: The phase change temperature of the energy storage material is -40℃ to 30℃.

Images