A distribution box and a temperature control method thereof

Abstract

The present application relates to vehicle-mounted distribution equipment and energy-saving refrigeration and air conditioning equipment technical field, especially to a distribution box and its temperature control method. The distribution box is provided with a hot box and a cold box which are separated from each other, a condenser pipeline is located in the hot box, an evaporator pipeline is located in the cold box, and a fan group drives air to flow through the corresponding pipeline and then is sent out; an air outlet air deflector is used to close the air outlet or guide cold air or hot air to the driving area or the tail of the vehicle. A controller adjusts the compressor, the fan group and the air deflector according to the vehicle start-stop state, the operation mode and the cold and hot box temperature, switches the fan gear according to the air supply temperature, and detects the air supply anomaly according to the actual air speed. The present application realizes cold and hot storage, driving area temperature control and cold and hot margin release by using the same refrigeration cycle, and improves the cold and hot energy utilization efficiency and operation reliability.

Description

Technical Field

[0001] This invention relates to the field of vehicle-mounted delivery equipment and energy-saving refrigeration and air conditioning equipment, and in particular to a delivery box and its temperature control method. Background Technology

[0002] With the development of the on-demand delivery industry, delivery vehicles with open driving areas, such as electric two-wheelers and electric tricycles, are widely used for the on-demand delivery of food and other goods. During delivery, different goods may have different requirements for keeping them cold or hot. Additionally, in hot summer or cold winter environments, drivers also need to cool or heat the driving area.

[0003] Existing vehicle delivery boxes mostly use passive insulation materials or have active cooling or heating devices only for a single storage space. For example, existing technology discloses a delivery box that is divided into multiple storage spaces and uses an actuator to cool or heat each space separately. This type of delivery box can meet the temperature maintenance requirements of different goods to a certain extent, but its temperature control is mainly concentrated inside the box, making it difficult to simultaneously use the cooling or heating generated by the box to regulate the temperature of the driver's area.

[0004] Furthermore, vehicles have limited installation space and power supply capabilities. Installing separate refrigeration units for the cold box, heating units for the hot box, and air conditioning units for the driver's area would not only increase equipment size, weight, and energy consumption, but also make it difficult to improve the overall utilization of cooling and heating during the refrigeration process. If the cold box and hot box share a refrigeration cycle, the cooling capacity on the evaporator side and the heat release capacity on the condenser side will be interrelated. Without coordinated control, problems such as excessively low cold box temperature, excessively high hot box temperature, or an inability to simultaneously meet cooling and heating demands can easily occur.

[0005] The existing delivery boxes lack an operating mode switching mechanism that coordinates with the vehicle's start-stop status. If the delivery box continues to operate in the driver's area air conditioning mode after the driver leaves, it can easily lead to a waste of vehicle power; if the refrigeration cycle is turned off directly, it may be unable to maintain the required storage temperature for the goods.

[0006] Furthermore, when the delivery box is fully loaded, goods or packaging may come into contact with or obstruct the air supply channel, leading to poor air circulation and affecting the transfer of cold or heat. In severe cases, this may even cause air supply failure or compressor overheating. Existing delivery boxes typically lack protective measures to detect and alarm for abnormal air supply based on fan operating status and actual wind speed.

[0007] Therefore, there is a need to provide a delivery box and its temperature control method, so as to achieve separate storage of cold and hot goods and temperature control of the driver's area using the same refrigeration cycle under limited vehicle installation space and power supply conditions, and to coordinate control according to the vehicle start-stop status, box temperature and air supply temperature, while monitoring the operation status of the air supply channel. Summary of the Invention

[0008] The purpose of this invention is to provide a delivery box and its temperature control method to solve the problems of existing delivery boxes, such as difficulty in simultaneously managing the separate storage of hot and cold goods and temperature control of the driver's area, low comprehensive utilization of hot and cold energy, lack of vehicle status linkage control, and difficulty in timely detection of abnormalities in the air supply channel.

[0009] To achieve the above objectives, the present invention adopts the following technical solution.

[0010] First aspect The present invention provides a delivery box for use in vehicles, including a box body, a refrigeration circulation component, an air supply component, an air guide component, a detection component, and a controller.

[0011] The enclosure contains a hot box and a cold box separated from each other, and the hot box and the cold box are respectively provided with an air inlet and an air outlet.

[0012] The refrigeration cycle assembly includes a compressor and valve body assembly, condenser piping, and evaporator piping. The condenser piping is located inside the hot box, and the evaporator piping is located inside the cold box, and is connected to the compressor and valve body assembly respectively.

[0013] The air supply assembly includes a fan unit, which is disposed in the hot box and the cold box. It is used to drive air to enter through the corresponding air inlet and to be discharged through the corresponding air outlet after flowing through the condenser pipe or the evaporator pipe.

[0014] The air guiding assembly includes air outlet guide plates respectively disposed at each of the air outlets. The air outlet guide plates are used to close the corresponding air outlets or to direct the corresponding hot or cold air to the driving area or rear of the vehicle.

[0015] The detection component includes a temperature sensor group for detecting the internal temperature of the hot box and the cold box.

[0016] The controller is connected to the compressor and valve assembly, the fan unit, the air outlet guide plate, and the temperature sensor group, and is also connected to the vehicle's control device. It is used to control the operating status of the compressor and valve assembly, the operating speed of the fan unit, and the opening and closing status and air guiding direction of the air outlet guide plate according to the vehicle's start-stop status, preset operating mode, and the internal temperature of the hot box and the cold box.

[0017] Preferably, the hot box and the cold box are arranged in a mirror image; the box body is made of thermal insulation material, and the top of the hot box and the cold box are respectively provided with a box cover, and the opening and closing area of ​​the box cover is provided with a sealing strip.

[0018] Preferably, the bottom of the hot box is provided with a heat exchange area, which is opposite to the air outlet of the hot box, and the condenser pipes are arranged in the heat exchange area; the bottom of the cold box is provided with a heat exchange area, which is opposite to the air outlet of the cold box, and the evaporator pipes are arranged in the heat exchange area; the air inlet of the hot box is located outside the heat exchange area, and the air inlet of the cold box is located outside the heat exchange area; fins are provided on both the condenser pipes and the evaporator pipes.

[0019] Preferably, the fan unit includes a hot box fan unit and a cold box fan unit, each including three DC fans; the hot box fan unit is located within the heat exchange area of ​​the hot box, and the cold box fan unit is located within the heat exchange area of ​​the cold box; the hot box fan unit drives air to enter through the air inlet of the hot box, and after flowing through the condenser pipe, it exits through the air outlet of the hot box; the cold box fan unit drives air to enter through the air inlet of the cold box, and after flowing through the evaporator pipe, it exits through the air outlet of the cold box; both the hot box and the cold box are provided with two pairs of air duct baffles, which are respectively located on both sides of the corresponding box body. The air duct baffles define an air supply channel extending from the corresponding air inlet to the corresponding air outlet within the corresponding hot box or cold box, and separate the air supply channel from the goods storage area.

[0020] Preferably, the temperature sensor group includes a cold box temperature sensor, a hot box temperature sensor, a cold box side air supply temperature sensor, and a hot box side air supply temperature sensor; the cold box temperature sensor is disposed inside the cold box, and the hot box temperature sensor is disposed inside the hot box; the cold box side air supply temperature sensor is disposed at the air outlet of the cold box, and the hot box side air supply temperature sensor is disposed at the air outlet of the hot box.

[0021] The detection assembly also includes an anemometer group, which includes a cold box-side anemometer and a hot box-side anemometer. The cold box-side anemometer is installed in the air supply channel of the cold box and near the air outlet of the cold box, and is used to detect the actual wind speed in the air supply channel of the cold box. The hot box-side anemometer is installed in the air supply channel of the hot box and near the air outlet of the hot box, and is used to detect the actual wind speed in the air supply channel of the hot box.

[0022] Preferably, the delivery box further includes a display connected to the controller; the display is used to provide parameter settings for the target temperature range of the cold box, the target temperature range of the hot box, the target temperature range of the cold box side air supply, the target temperature range of the hot box side air supply, and the preset operating mode, and to display the operating status and fault alarm information of the delivery box.

[0023] Preferably, the compressor and valve assembly includes a DC inverter compressor, a solenoid valve, and an electronic expansion valve; the refrigeration cycle assembly further includes a dryer filter; the DC inverter compressor, the condenser piping, the dryer filter, the solenoid valve, the electronic expansion valve, and the evaporator piping are sequentially connected to form a closed refrigerant circulation loop; the condenser piping is used to release heat into the hot box, and the evaporator piping is used to absorb heat from the cold box; the delivery box is powered by a vehicle power supply or an independent DC power supply, and the controller is also used to control the power supply to the delivery box.

[0024] Preferably, the controller is used to control the operation of the compressor and valve body assembly, the hot box fan unit, the cold box fan unit, and the air outlet guide plate according to the preset operating mode; the preset operating mode includes air conditioning cooling mode, air conditioning heating mode, and air conditioning off mode.

[0025] In the air conditioning cooling mode, the controller is used to adjust the operating frequency of the compressor and the compressor in the valve body assembly according to the cold box temperature, adjust the operating level of the cold box fan unit according to the cold box side air supply temperature, control the air outlet guide plate of the cold box to guide the air towards the driving area of ​​the vehicle, and control the air outlet guide plate of the hot box to close or guide the air towards the rear of the vehicle according to the hot box temperature.

[0026] In the air conditioning heating mode, the controller is used to adjust the operating frequency of the compressor according to the temperature of the hot box, adjust the operating level of the hot box fan unit according to the temperature of the hot box side air supply, control the air outlet guide plate of the hot box to guide the air towards the driving area of ​​the vehicle, and control the air outlet guide plate of the cold box to close or guide the air towards the rear of the vehicle according to the temperature of the cold box.

[0027] In the air conditioning off mode, the controller controls the compressor, the hot box fan unit and the cold box fan unit to operate in a preset low load state, and controls the corresponding air outlet guide vanes to close or direct airflow toward the rear of the vehicle according to the hot box temperature and the cold box temperature.

[0028] Second aspect The present invention also provides a temperature control method for a delivery box, implemented based on the delivery box described in the first aspect, comprising: When the delivery box is powered on, the vehicle's start / stop status, preset operating mode, cold box temperature, and hot box temperature are obtained. The preset operating modes include air conditioning cooling mode, air conditioning heating mode, and air conditioning off mode. The current operating mode is determined based on the vehicle's start / stop status and the preset operating mode; When the current operating mode is the air conditioning cooling mode, the fan unit is controlled to operate, the air outlet guide plate of the cold box is controlled to guide the air towards the driving area of ​​the vehicle, the operating frequency of the compressor in the compressor and valve body assembly is adjusted according to the cold box temperature, and the air outlet guide plate of the hot box is controlled to close or guide the air towards the rear of the vehicle according to the hot box temperature. When the current operating mode is the air conditioning heating mode, the fan unit is controlled to operate, the air outlet guide plate of the hot box is controlled to guide the air towards the driving area of ​​the vehicle, the operating frequency of the compressor is adjusted according to the temperature of the hot box, and the air outlet guide plate of the cold box is controlled to close or guide the air towards the rear of the vehicle according to the temperature of the cold box. When the current operating mode is the air conditioning off mode, the compressor and the fan unit are controlled to operate in a preset low load state, and the corresponding air outlet guide vanes are controlled to close or guide air towards the rear of the vehicle according to the cold box temperature and the hot box temperature.

[0029] Preferably, when the vehicle is in a closed state, the air conditioning off mode is determined as the current operating mode; when the vehicle is in a closed state, the preset operating mode is determined as the current operating mode.

[0030] Preferably, when the current operating mode is the air conditioning cooling mode, the compressor target operating frequency is determined according to the cold box temperature and the preset cold box target temperature range, and the compressor is controlled to operate at the compressor target operating frequency.

[0031] When the temperature of the cold box is higher than the upper limit of the target temperature range of the cold box, a first temperature difference between the cold box temperature and the upper limit of the target temperature range of the cold box is determined. A first frequency adjustment amount is determined according to the first temperature difference and a preset frequency adjustment rule. The smaller value among the current operating frequency of the compressor, the sum of the first frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor.

[0032] When the temperature of the cold box is lower than the lower limit of the target temperature range of the cold box, a second temperature difference between the lower limit of the target temperature range of the cold box and the temperature of the cold box is determined. A second frequency adjustment amount is determined according to the second temperature difference and the preset frequency adjustment rule. The larger value between the current operating frequency of the compressor and the difference between the second frequency adjustment amount and the preset minimum operating frequency is determined as the target operating frequency of the compressor.

[0033] When the temperature of the cold box is within the target temperature range of the cold box, the preset reference operating frequency is determined as the target operating frequency of the compressor.

[0034] When the temperature of the heat box is higher than the upper limit of the preset target temperature range of the heat box, the air outlet guide vane of the heat box is controlled to guide the air towards the rear of the vehicle; when the temperature of the heat box is not higher than the upper limit of the target temperature range of the heat box, the air outlet guide vane of the heat box is controlled to close.

[0035] Preferably, the cold box side air supply temperature is obtained; when the current operating mode is the air conditioning cooling mode, the target operating level of the cold box fan unit is determined according to the cold box side air supply temperature and the preset cold box side air supply target temperature range, and the cold box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level.

[0036] When the cold box side air supply temperature is lower than the lower limit of the cold box side air supply target temperature range, the preset low-speed operation level is determined as the target operation level; when the cold box side air supply temperature is higher than the upper limit of the cold box side air supply target temperature range, the preset high-speed operation level is determined as the target operation level; when the cold box side air supply temperature is within the cold box side air supply target temperature range, the preset reference operation level is determined as the target operation level.

[0037] Preferably, when the current operating mode is the air conditioning heating mode, the target operating frequency of the compressor is determined according to the temperature of the heating box and the preset target temperature range of the heating box, and the compressor is controlled to operate at the target operating frequency of the compressor.

[0038] When the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, a third temperature difference between the hot box temperature and the upper limit of the target temperature range of the hot box is determined. A third frequency adjustment amount is determined according to the third temperature difference and the preset frequency adjustment rule. The larger value between the current operating frequency of the compressor and the difference between the third frequency adjustment amount and the preset minimum operating frequency is determined as the target operating frequency of the compressor.

[0039] When the temperature of the hot box is lower than the lower limit of the target temperature range of the hot box, a fourth temperature difference between the lower limit of the target temperature range of the hot box and the temperature of the hot box is determined. A fourth frequency adjustment amount is determined according to the fourth temperature difference and the preset frequency adjustment rule. The smaller value between the current operating frequency of the compressor, the sum of the fourth frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor.

[0040] When the temperature of the hot box is within the target temperature range of the hot box, the preset reference operating frequency is determined as the target operating frequency of the compressor.

[0041] When the temperature of the cold box is lower than the lower limit of the preset target temperature range of the cold box, the air outlet guide vane of the cold box is controlled to guide the air towards the rear of the vehicle; when the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the air outlet guide vane of the cold box is controlled to close.

[0042] Preferably, the supply air temperature on the hot box side is obtained; when the current operating mode is the air conditioning heating mode, the target operating level of the hot box fan unit is determined according to the supply air temperature on the hot box side and the preset target temperature range of the supply air on the hot box side, and the hot box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level.

[0043] When the supply air temperature on the hot box side is lower than the lower limit of the target temperature range for the supply air on the hot box side, the preset high-level operating setting is determined as the target operating setting; when the supply air temperature on the hot box side is higher than the upper limit of the target temperature range for the supply air on the hot box side, the preset low-level operating setting is determined as the target operating setting; when the supply air temperature on the hot box side is within the target temperature range for the supply air on the hot box side, the preset reference operating setting is determined as the target operating setting.

[0044] Preferably, when the current operating mode is the air conditioner off mode, the compressor is controlled to operate at a preset low operating frequency, and the hot box fan unit and the cold box fan unit are controlled to operate according to the PWM duty cycle corresponding to the preset low load operating level.

[0045] When the temperature of the heat box is higher than the upper limit of the preset target temperature range of the heat box, the air outlet guide vane of the heat box is controlled to guide the air towards the rear of the vehicle; when the temperature of the heat box is not higher than the upper limit of the target temperature range of the heat box, the air outlet guide vane of the heat box is controlled to close.

[0046] When the temperature of the cold box is lower than the lower limit of the preset target temperature range of the cold box, the air outlet guide vane of the cold box is controlled to guide the air towards the rear of the vehicle; when the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the air outlet guide vane of the cold box is controlled to close.

[0047] Preferably, the temperature control method further includes: during the operation of the hot box fan unit or the cold box fan unit, obtaining the actual wind speed in the corresponding air supply channel through the corresponding hot box side anemometer or the cold box side anemometer; determining the reference wind speed corresponding to the air supply channel according to the current operating speed of the corresponding fan unit; when the actual wind speed is lower than a preset proportion of the reference wind speed and continues to reach a preset duration, determining that the air supply channel has an air supply abnormality and outputting a fault alarm information; when the actual wind speed recovers to the reference wind speed, canceling the air supply abnormality.

[0048] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, by setting condenser pipes and evaporator pipes in separate hot and cold boxes, utilizes the same refrigeration cycle to simultaneously form the heating end of the hot box and the cooling end of the cold box. The air is selectively guided to the driving area or the rear of the vehicle by the fan unit and the air outlet guide plate. This can take into account the separate storage of hot and cold goods and the temperature control of the driving area, which is conducive to improving the comprehensive utilization of the cold and heat generated by the vehicle refrigeration cycle.

[0049] 2. By arranging the hot box and cold box in a mirror image, this invention simplifies the design and assembly of the dual-temperature zone box and air supply structure; by using insulated boxes, lids and sealing strips to reduce heat exchange between the hot box, cold box and the external environment, it helps to reduce the loss of cold or heat during the storage of goods.

[0050] 3. This invention sets heat exchange areas at the bottom of the hot box and cold box respectively, sets the corresponding heat exchange pipelines in the heat exchange areas, and sets the air inlet outside the heat exchange area and the heat exchange area opposite to the air outlet, which can guide the air to flow through the heat exchange pipelines and then discharge it; by setting fins to increase the heat exchange area, it is beneficial to improve the heat exchange efficiency between the air and the condenser pipelines or evaporator pipelines.

[0051] 4. By configuring fan units including three DC fans in the heat exchange area of ​​the hot box and the heat exchange area of ​​the cold box respectively, the present invention can improve the air supply capacity and heat exchange uniformity of the corresponding heat exchange areas; by setting two pairs of air duct baffles on both sides of the box to limit the air supply channel and separate the goods storage area, the possibility of goods or packaging materials blocking the air supply channel under full load can be reduced.

[0052] 5. By separately detecting the cold box temperature, hot box temperature, cold box side air supply temperature, and hot box side air supply temperature, this invention can simultaneously obtain the temperature status of the air supply in the cargo storage space and the driver's area; by setting up cold box side anemometers and hot box side anemometers near the air outlet, the actual air supply status of the corresponding air supply channels can be obtained, providing a basis for temperature regulation and air supply anomaly detection.

[0053] 6. This invention provides parameter settings for the target temperature range of the cold box, the target temperature range of the hot box, the target temperature range of the side air supply of the cold and hot boxes, and the operating mode through a display, and displays the operating status and fault alarm information, which helps to improve the convenience of setting delivery box parameters, reading status and providing fault prompts.

[0054] 7. This invention forms a closed refrigerant circulation loop through a DC inverter compressor, condenser piping, dryer filter, solenoid valve, electronic expansion valve, and evaporator piping. It can use the heat release effect of the condenser piping to heat the hot box and the heat absorption effect of the evaporator piping to cool the cold box. It is powered by the vehicle power supply or an independent DC power supply and the power supply is controlled by the controller, which is beneficial to adapting to the vehicle's on-board power supply conditions.

[0055] 8. By setting air conditioning cooling mode, air conditioning heating mode and air conditioning off mode, and coordinating the operation of compressor, hot and cold box fan unit and air outlet guide plate in different modes, the present invention can switch the corresponding control strategy according to the temperature control requirements of the driving area and the temperature status of the hot and cold box, which helps to reduce the overheating of the hot box or the overcooling of the cold box and improve the utilization efficiency of cold and heat energy under limited on-board energy conditions.

[0056] 9. The present invention determines the current operating mode based on the vehicle's start-stop status and preset operating mode, and executes different compressor, fan unit and air guide plate control processes in air conditioning cooling mode, air conditioning heating mode and air conditioning off mode, which can link the maintenance of cargo temperature, driver area temperature control and vehicle operating status.

[0057] 10. The present invention automatically determines the air conditioning off mode as the current operating mode when the vehicle is turned off, and operates according to the preset operating mode when the vehicle is turned on. This can reduce the energy waste caused by the continuous supply of air to the driving area after the vehicle is not in use, while maintaining the storage temperature required for hot and cold goods.

[0058] 11. In the air conditioning cooling mode, the present invention determines the compressor frequency adjustment amount according to the degree to which the cold box temperature deviates from the target cold box temperature range, and limits the target operating frequency of the compressor by the maximum operating frequency and the minimum operating frequency, which can adjust the cooling cycle output according to the cold box cooling demand; when the hot box temperature is too high, excess heat is released towards the rear of the vehicle, which is beneficial to coordinating the cooling of the cold box and the maintenance of the hot box temperature.

[0059] 12. In the air conditioning cooling mode, the present invention switches the cold box fan unit between low, high and reference operating levels according to the cold box side air supply temperature and operates according to the corresponding PWM duty cycle. It can adjust the cold box side air supply capacity according to the cold air supply temperature and improve the adaptability of cold air output in the driver's area.

[0060] 13. In the air conditioning heating mode, the present invention determines the compressor frequency adjustment amount according to the degree to which the hot box temperature deviates from the target temperature range of the hot box, and limits the target operating frequency of the compressor by the maximum operating frequency and the minimum operating frequency, which can adjust the cooling cycle output according to the heating demand of the hot box; when the cold box temperature is too low, excess cold energy is released towards the rear of the vehicle, which is beneficial to coordinating the heating of the hot box and the maintenance of the cold box temperature.

[0061] 14. In the air conditioning heating mode, the present invention switches the hot box fan unit between high, low and reference operating levels according to the hot box side air supply temperature and operates according to the corresponding PWM duty cycle. It can adjust the hot box side air supply capacity according to the hot air supply temperature and improve the adaptability of hot air output in the driver's area.

[0062] 15. In the air conditioning off mode, the present invention controls the compressor and the hot and cold box fan unit to operate at a preset low load state, and selectively releases excess heat or cold energy towards the rear of the vehicle according to the temperature of the hot and cold box. It can maintain the storage temperature of goods without actively blowing air into the driver's area, which helps to reduce the on-board energy consumption of the delivery box.

[0063] 16. This invention determines the reference wind speed of the corresponding air supply channel based on the current operating speed of the fan unit, and determines the air supply abnormality and outputs fault alarm information when the actual wind speed is continuously lower than the preset conditions. The abnormality is resolved after the actual wind speed recovers. This invention can promptly detect problems such as goods obstruction, air duct blockage, or reduced air supply capacity, which helps to reduce the risk of air supply failure or compressor overheating. Attached Figure Description

[0064] Figure 1 This is a schematic flowchart of a temperature control method for a delivery box provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of a delivery box provided in an embodiment of the present invention, which shows a hot box 1, a compressor and valve body assembly 2, a cold box 3, an air outlet guide plate 5, a controller 11, and a temperature sensor group 13; Figure 3 This is a schematic diagram of the internal air supply structure of a delivery box according to an embodiment of the present invention, showing the box cover 4, fan unit 7, air duct baffle 9 and anemometer group 10; Figure 4 This is a schematic diagram of the disassembled structure of the heat exchange and air supply components of a delivery box according to an embodiment of the present invention, which shows the box cover 4, condenser pipe 6, fan unit 7, air inlet 8, air duct baffle 9, anemometer group 10 and evaporator pipe 12. Figure 5This is a top view of a delivery box with the lid open, according to an embodiment of the present invention. It shows a hot box 1, a compressor and valve assembly 2, a cold box 3, a lid 4, an air outlet guide plate 5, a condenser pipe 6, a fan unit 7, an air duct baffle 9, a controller 11, an evaporator pipe 12, and a temperature sensor group 13. Figure 6 This is a side view of a delivery box with the lid open, according to an embodiment of the present invention. It shows the box lid 4, the air outlet guide plate 5, the condenser pipe 6, the fan unit 7, the air inlet 8, the air duct baffle 9, and the anemometer group 10. Figure 7 This is a schematic diagram of the air outlet guide plate provided in the embodiment of the present invention under different working states, showing the closed state, the air guiding state towards the rear of the vehicle, and the air guiding state towards the driving area of ​​the air outlet guide plate 5. Figure 8 This is a schematic diagram of the refrigerant circulation loop provided in an embodiment of the present invention, which shows the compressor and valve body assembly 2, the condenser pipeline 6 and the evaporator pipeline 12. The compressor and valve body assembly 2 includes a DC inverter compressor, a solenoid valve and an electronic expansion valve. The refrigeration cycle assembly also includes a dryer filter. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0066] In the description of this invention, it should be noted that the term "cold box" refers to a storage space inside a delivery box used to create a relatively low temperature for storing goods, and the term "hot box" refers to a storage space inside a delivery box used to create a relatively high temperature for storing goods; the term "driving area" refers to the area on the vehicle close to the driver; and the term "rear direction" refers to the direction away from the driving area and towards the rear of the vehicle.

[0067] Unless otherwise expressly defined, the term "connection" in this invention can refer to a direct connection or an indirect connection achieved through intermediate components; "communication connection" can refer to a wired communication connection or a wireless communication connection. The same reference numeral can be used to represent multiple components located in different positions but with the same or corresponding structure and function. For example, the air outlet guide vanes located in both the hot box and the cold box can be represented by reference numeral 5, and the fans located inside both the hot box and the cold box can be represented by reference numeral 7.

[0068] Example 1: Delivery Box Example This embodiment provides a delivery box applied to a vehicle for storing goods requiring refrigeration and goods requiring insulation during delivery. The delivery box can selectively utilize cold air from the refrigerated side or hot air from the heated side to regulate the temperature of the vehicle's driver's area. For example, the vehicle can be an electric two-wheeled vehicle, and the delivery box can be located in the goods carrying area of ​​the electric two-wheeled vehicle.

[0069] like Figure 2 As shown, in this embodiment, the delivery box includes a box body, a refrigeration cycle assembly, an air supply assembly, an air guide assembly, a detection assembly, and a controller 11. The hot box 1 and the cold box 3 are separated from each other. The compressor and valve assembly 2 are located between the hot box 1 and the cold box 3. Air outlet guide plates 5 are provided at the air outlets of both the hot box 1 and the cold box 3. The controller 11 is used to control the operation of the delivery box, and the temperature sensor group 13 is used to detect the temperature of the hot box 1 and the cold box 3.

[0070] The enclosure contains a separate hot box 1 and a cold box 3. The hot box 1 is used to store goods that require insulation or are in a relatively high-temperature environment, while the cold box 3 is used to store goods that require insulation or are in a relatively low-temperature environment. The hot box 1 and the cold box 3 are each equipped with an air inlet 8 and an air outlet, allowing the hot box 1 and the cold box 3 to form their respective airflow paths.

[0071] The refrigeration cycle assembly includes a compressor and valve body assembly 2, a condenser piping 6, and an evaporator piping 12. The condenser piping 6 is located inside the hot box 1, and the evaporator piping 12 is located inside the cold box 3. The condenser piping 6 and the evaporator piping 12 are respectively connected to the compressor and valve body assembly 2.

[0072] When the refrigeration cycle assembly is running, the evaporator pipe 12 absorbs heat from the cold box 3 to lower the temperature inside the cold box 3; the condenser pipe 6 releases heat to the hot box 1 to raise or maintain the temperature inside the hot box 1. Thus, the cold box 3 and the hot box 1 share the same refrigerant circulation loop. The evaporator side of the refrigerant circulation loop is used to cool the cold box 3, and the condenser side of the refrigerant circulation loop is used to heat the hot box 1.

[0073] The air supply assembly includes a fan unit 7, which is installed in both the hot box 1 and the cold box 3. The fan in the hot box 1 drives air to enter through the air inlet 8. After the air flows through the condenser pipes 6 and exchanges heat with them, the resulting hot air is discharged from the air outlet of the hot box 1. The fan in the cold box 3 drives air to enter through the air inlet 8. After the air flows through the evaporator pipes 12 and exchanges heat with them, the resulting cold air is discharged from the air outlet of the cold box 3.

[0074] The air guiding assembly includes air outlet guide vanes 5 respectively disposed at each air outlet. The air outlet guide vanes 5 can switch between a closed position, an air guiding position facing the driver's area, and an air guiding position facing the rear of the vehicle.

[0075] When the air outlet guide vane 5 is in the closed position, the corresponding air outlet is closed, thereby reducing the loss of heat from the hot box 1 or cold box 3. When the air outlet guide vane 5 is in the airflow guiding position towards the driver's area, the corresponding hot or cold air is guided to the driver's area of ​​the vehicle to improve the thermal comfort of the driver's area. When the air outlet guide vane 5 is in the airflow guiding position towards the rear of the vehicle, excess heat or cold air in the corresponding box is guided towards the rear of the vehicle to prevent the hot box 1 from overheating or the cold box 3 from overcooling.

[0076] like Figure 7 As shown, when the air outlet guide vane 5 is switched from the closed position to the open position, the air outlet guide vane 5 can rotate to a guiding position facing the rear of the vehicle or a guiding position facing the driver's area. When the air outlet guide vane 5 faces the rear of the vehicle, excess heat or cold generated by the corresponding box is directed towards the rear of the vehicle; when the air outlet guide vane 5 faces the driver's area, the hot air generated by the heat box 1 or the cold air generated by the cold box 3 is directed towards the driver's area of ​​the vehicle.

[0077] The detection component includes a temperature sensor group 13. The temperature sensor group 13 is used to detect the internal temperature of the hot box 1 and the cold box 3, so that the controller 11 can control the refrigeration cycle component and the air guide component according to the actual temperature of the hot box 1 and the cold box 3.

[0078] The controller 11 is connected to the compressor and valve assembly 2, the fan unit 7, the air outlet guide plate 5, and the temperature sensor group 13, and is also communicatively connected to the vehicle's control device. The controller 11 is used to obtain the vehicle's start-stop status from the vehicle's control device, and based on the vehicle's start-stop status, preset operating mode, and the internal temperatures of the hot box 1 and cold box 3, to control the operating status of the compressor and valve assembly 2, the operating speed of the fan unit 7, and the opening / closing status and airflow direction of the air outlet guide plate 5.

[0079] Preferably, the hot box 1 and the cold box 3 are arranged in a mirror image. The box structure, air inlet structure, air outlet structure, air supply structure and air guide structure of the hot box 1 and the cold box 3 are corresponding. The main difference is that the hot box 1 is equipped with a condenser pipe 6 and the cold box 3 is equipped with an evaporator pipe 12.

[0080] By setting the hot box 1 and cold box 3 as a mirror structure, the regularity of the internal structure of the box can be improved, making it easier to arrange a dual-temperature zone structure within the limited vehicle installation space. When only one side of the internal structure of the hot box 1 or cold box 3 is shown in detail in the attached figure, the side not shown in detail can be equipped with the corresponding air inlet 8, air outlet, fan unit 7, air duct baffle 9, temperature sensor and anemometer according to the mirror relationship.

[0081] like Figure 5 As shown, after the covers 4 of the hot box 1 and the cold box 3 are opened, the internal layout of the hot box 1 and the cold box 3 can be observed from a top-down view. The hot box 1 and the cold box 3 are located on both sides of the compressor and valve body assembly 2. Corresponding heat exchange pipelines, fan units 7, and air duct baffles 9 are respectively installed in the two boxes. The controller 11 is located between the hot box 1 and the cold box 3 and is connected to the corresponding actuators and detection components. Temperature sensor groups 13 are located in the hot box 1, the cold box 3, and at the corresponding air outlets to detect the internal temperature and the supply air temperature.

[0082] Preferably, the enclosure is made of insulating material to reduce heat exchange between the hot box 1 and the external environment, between the cold box 3 and the external environment, and between the hot box 1 and the cold box 3.

[0083] For example, the insulation material may be polyurethane foam, aerogel composite material or other materials with thermal insulation properties.

[0084] Both the hot box 1 and the cold box 3 are equipped with lids 4 on their tops. The lids 4 are used to open or close the corresponding storage spaces for goods. The opening and closing areas of the lids 4 are equipped with sealing strips to improve the sealing performance when the lids 4 are closed.

[0085] Furthermore, in addition to the area where the box cover 4 is located, the top of the hot box 1 and the cold box 3 are respectively provided with corresponding air outlets, and each air outlet is provided with an air outlet guide plate 5.

[0086] like Figure 6 As shown, when viewed from the side of the enclosure, the air inlet 8 is located at the bottom of the enclosure and outside the heat exchange area. The fan unit 7 and the condenser piping 6 or evaporator piping 12 are located in the heat exchange area at the bottom of the enclosure. The air duct baffle 9 extends from the bottom of the enclosure to the top air outlet, and the anemometer group 10 is located near the air outlet. When the air outlet guide plate 5 is in the closed state, the air outlet guide plate 5 closes the corresponding air outlet to reduce the loss of heat from the hot box 1 or cold box 3.

[0087] For example, a silicone sealing strip can be used. By setting a sealing strip, the loss of cold or heat caused by vehicle vibration, gaps in the assembly of the lid 4, or frequent opening of the lid 4 during the delivery of goods can be reduced.

[0088] More preferably, the bottom of the hot box 1 is provided with a heat exchange area, which is positioned opposite to the air outlet of the hot box 1, and the condenser pipe 6 is located in the heat exchange area. The bottom of the cold box 3 is provided with a heat exchange area, which is positioned opposite to the air outlet of the cold box 3, and the evaporator pipe 12 is located in the heat exchange area.

[0089] The air inlet 8 of the hot box 1 is located on the outside of the heat exchange area of ​​the hot box, so that the air entering the hot box 1 first flows into the heat exchange area of ​​the hot box, exchanges heat with the condenser pipe 6, and then flows into the air outlet of the hot box 1. The air inlet 8 of the cold box 3 is located on the outside of the heat exchange area of ​​the cold box, so that the air entering the cold box 3 first flows into the heat exchange area of ​​the cold box, exchanges heat with the evaporator pipe 12, and then flows into the air outlet of the cold box 3.

[0090] Specifically, fins are provided on both the condenser pipe 6 and the evaporator pipe 12. The fins are used to increase the heat exchange area between the condenser pipe 6 or the evaporator pipe 12 and the air, thereby improving the heat exchange efficiency of the hot box heat exchange area and the cold box heat exchange area.

[0091] like Figure 4 As shown, the cover 4, heat exchange pipes, fan unit 7, and the side of the enclosure equipped with duct baffle 9 and anemometer group 10 can be assembled according to the positions shown in the diagram. A condenser pipe 6 is installed in the heat exchange area of ​​the hot box 1, and an evaporator pipe 12 is installed in the heat exchange area of ​​the cold box 3. The air inlet 8 of the enclosure is located on the outside of the heat exchange area. After air enters the enclosure through the air inlet 8, it flows through the condenser pipe 6 or evaporator pipe 12 under the drive of the fan unit 7, and flows towards the air outlet along the air supply channel defined by the duct baffle 9.

[0092] like Figure 3 As shown, Figure 3 The internal air supply structure of either hot box 1 or cold box 3 is illustrated as an example. A cover 4 is installed on the top of the box, a fan unit 7 is installed inside, two pairs of duct baffles 9 are respectively installed on both sides of the box, and an anemometer group 10 is installed in the air supply duct near the air outlet. The internal air supply structures of hot box 1 and cold box 3 can be arranged in a mirror image relationship.

[0093] More preferably, the fan unit 7 includes a hot box fan unit and a cold box fan unit. The hot box fan unit is located within the heat exchange area of ​​the hot box, and the cold box fan unit is located within the heat exchange area of ​​the cold box.

[0094] The hot box fan unit drives air to enter through the air inlet 8 of the hot box 1, and the air is discharged from the air outlet of the hot box 1 after flowing through the condenser pipe 6. The cold box fan unit drives air to enter through the air inlet 8 of the cold box 3, and the air is discharged from the air outlet of the cold box 3 after flowing through the evaporator pipe 12.

[0095] Specifically, both the hot box fan unit and the cold box fan unit include three DC fans. The three DC fans can be arranged along the corresponding heat exchange area to increase the airflow through the condenser line 6 or the evaporator line 12 and reduce the problem of uneven local heat exchange.

[0096] Both the hot box 1 and the cold box 3 are equipped with two pairs of air duct baffles 9, which are respectively located on both sides of the corresponding box body. The air duct baffles 9 are used to define an air supply channel extending from the corresponding air inlet 8 to the corresponding air outlet within the hot box 1 or the cold box 3, and to separate the air supply channel from the goods storage area.

[0097] By separating the air supply channel from the goods storage area by the air duct baffle 9, it is possible to prevent goods or goods packaging from coming into contact with the condenser pipe 6, evaporator pipe 12 or air outlet, reduce the possibility of goods blocking the air supply channel under full load delivery conditions, and allow air to flow along the predetermined air supply channel.

[0098] More preferably, the temperature sensor group 13 includes a cold box temperature sensor, a hot box temperature sensor, a cold box side air supply temperature sensor, and a hot box side air supply temperature sensor.

[0099] A cold box temperature sensor is installed inside the cold box 3 to detect the cold box temperature; a hot box temperature sensor is installed inside the hot box 1 to detect the hot box temperature. A cold box side air supply temperature sensor is installed at the air outlet of the cold box 3 to detect the cold box side air supply temperature; a hot box side air supply temperature sensor is installed at the air outlet of the hot box 1 to detect the hot box side air supply temperature.

[0100] The cold box temperature and hot box temperature are used to reflect the temperature status of the corresponding goods storage space, while the cold box side air supply temperature and hot box side air supply temperature are used to reflect the temperature status of the cold or hot air delivered to the driver's area or the rear of the vehicle.

[0101] More preferably, the detection assembly further includes an anemometer group 10, which includes a cold box side anemometer and a hot box side anemometer.

[0102] A cold box-side anemometer is installed inside the air supply duct of cold box 3, near the air outlet of cold box 3, to detect the actual wind speed inside the air supply duct of cold box 3. A hot box-side anemometer is installed inside the air supply duct of hot box 1, near the air outlet of hot box 1, to detect the actual wind speed inside the air supply duct of hot box 1.

[0103] Anemometers can be propeller-type anemometers or other sensing elements capable of detecting changes in wind speed or volume. By placing the anemometer near the corresponding air outlet, the actual airflow status after passing through the heat exchange area and air supply duct can be detected to determine whether there are problems such as goods obstructing the air supply duct, duct blockage, or reduced airflow capacity.

[0104] More preferably, the delivery box also includes a display connected to the controller 11. The display is used to receive parameter settings for the target temperature range of the cold box, the target temperature range of the hot box, the target temperature range of the cold box side air supply, the target temperature range of the hot box side air supply, and the preset operating mode, and to display the operating status and fault alarm information of the delivery box.

[0105] Users can directly set the target temperature range through the display, or they can set the target temperature and allowable temperature deviation. The controller 11 will determine the corresponding target temperature range based on the target temperature and allowable temperature deviation.

[0106] Specifically, the controller 11 and the display can be integrated into the same embedded device. The controller 11 is used to control the various actuators of the delivery box and communicate with the vehicle's control device. The display is used to provide parameter settings, delivery box status reading, and fault alarm information display.

[0107] Specifically, the compressor and valve body assembly 2 includes a DC inverter compressor, a solenoid valve and an electronic expansion valve, and the refrigeration cycle assembly also includes a dryer filter.

[0108] like Figure 8 As shown, the DC inverter compressor, condenser line 6, dryer filter, solenoid valve, electronic expansion valve, and evaporator line 12 are connected in sequence to form a closed refrigerant circulation loop. After being discharged from the DC inverter compressor, the refrigerant flows sequentially through the condenser line 6, dryer filter, solenoid valve, electronic expansion valve, and evaporator line 12, and returns to the DC inverter compressor via the evaporator line 12. During the refrigerant circulation process, the condenser line 6 releases heat into the hot box 1, while the evaporator line 12 absorbs heat from the cold box 3.

[0109] For example, the DC inverter compressor may be a small DC inverter compressor suitable for vehicle mounting.

[0110] This embodiment uses the same refrigerant circulation loop to simultaneously form the cold end of the cold box 3 and the hot end of the hot box 1. The condenser pipe 6 and the evaporator pipe 12 form the same refrigerant circulation loop. In the air conditioning cooling mode, the controller 11 adjusts the operating frequency of the compressor according to the cold box temperature, and controls the air outlet guide plate 5 of the hot box 1 to guide air towards the rear of the vehicle when the hot box temperature is too high; in the air conditioning heating mode, the controller 11 adjusts the operating frequency of the compressor according to the hot box temperature, and controls the air outlet guide plate 5 of the cold box 3 to guide air towards the rear of the vehicle when the cold box temperature is too low.

[0111] This embodiment does not configure independent compressors for the cold box 3 and the hot box 1 respectively. Instead, it selects the corresponding main temperature control object in different operating modes and releases excess heat or excess cold through the air outlet guide plate 5 of the other box to achieve coordinated temperature control between the cold box 3 and the hot box 1.

[0112] Specifically, the delivery box can be powered by the vehicle's battery or by a separate DC power supply located in the delivery box. The controller 11 is also used to control the power supply to the delivery box.

[0113] In the air conditioning cooling mode, the controller 11 uses the cold box temperature as the main basis for adjusting the operating frequency of the DC inverter compressor to prioritize meeting the cold box 3's cold preservation needs and the cooling needs of the driving area; when the hot box temperature is too high, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to guide the air towards the rear of the vehicle to expel excess heat.

[0114] In the air conditioning heating mode, the controller 11 uses the temperature of the hot box as the main basis for adjusting the operating frequency of the DC inverter compressor to prioritize meeting the heat preservation needs of the hot box 1 and the heating needs of the driving area; when the temperature of the cold box is too low, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the rear of the vehicle to expel excess cold energy.

[0115] In the air conditioning off mode, the controller 11 controls the DC inverter compressor, hot box fan unit and cold box fan unit to operate at a preset low load state, and controls the hot box 1 and cold box 3 to maintain the corresponding cargo storage temperature, without actively sending air to the driver's area.

[0116] Example 2: Temperature Control Method Example like Figure 1 As shown, this embodiment provides a temperature control method for a delivery box, which is implemented based on the delivery box described in Embodiment 1.

[0117] The temperature control method in this embodiment includes the following steps.

[0118] Step 1: When the delivery box is powered on, obtain the vehicle's start / stop status, preset operating mode, cold box temperature, and hot box temperature.

[0119] In this embodiment, the controller 11 is communicatively connected to the vehicle's control device and obtains the vehicle's start / stop status through the vehicle's control device. The cold box temperature is detected by a cold box temperature sensor, and the hot box temperature is detected by a hot box temperature sensor.

[0120] The preset operating modes include air conditioning cooling mode, air conditioning heating mode, and air conditioning off mode. Air conditioning cooling mode is used to prioritize the cold storage needs of cold box 3 and the cooling needs of the driver's area; air conditioning heating mode is used to prioritize the heat storage needs of hot box 1 and the heating needs of the driver's area; air conditioning off mode is used to maintain the storage temperature of goods in cold box 3 and hot box 1 without actively supplying cooling or heating to the driver's area.

[0121] Preferably, before the delivery box is put into operation, the target temperature range of the cold box, the target temperature range of the hot box, the target temperature range of the cold box side air supply, the target temperature range of the hot box side air supply, and the preset operating mode are set via the display.

[0122] Specifically, you can directly set each target temperature range, or you can set the target temperature and allowable temperature deviation separately, and determine the corresponding target temperature range based on the target temperature and allowable temperature deviation.

[0123] For example, the allowable temperature deviation can be ±5°C. When the actual temperature is within 5°C of the target temperature, the actual temperature is determined to be within the corresponding target temperature range.

[0124] For example, the target temperature range of the cold box can be 2℃~10℃, the target temperature range of the hot box can be 45℃~65℃, the target temperature range of the cold box side air supply can be 15℃~25℃, and the target temperature range of the hot box side air supply can be 28℃~38℃.

[0125] More preferably, after the delivery box is powered on, the controller 11 and the display enter the working state, while the delivery box remains powered off. The controller 11 initializes the compressor and valve assembly 2, the hot box fan unit, the cold box fan unit, and the air outlet guide plate 5. After initialization, the delivery box can respond to the power-on command and enter the power-on state.

[0126] When the delivery box responds to the shutdown command, the controller 11 first controls the compressor to stop running; after the compressor stops running, it then controls the hot box fan unit and the cold box fan unit to stop running, and controls the air outlet guide vanes 5 of the hot box 1 and the cold box 3 to close. The controller 11 can remain powered on to display status or wait for subsequent power-on commands, or it can disconnect the power supply to the delivery box.

[0127] Step 2: Determine the current operating mode based on the vehicle's start / stop status and preset operating mode.

[0128] When the vehicle is turned off, the air conditioning off mode is set as the current operating mode.

[0129] When the vehicle is turned on, the user-preset operating mode will be selected as the current operating mode.

[0130] Specifically, when the delivery box is in the powered-on state and the vehicle is in the powered-off state, the controller 11 controls the compressor, the hot box fan unit and the cold box fan unit to start, and causes the delivery box to automatically enter the air conditioning off mode in order to maintain the storage temperature of the goods in the cold box 3 and the hot box 1.

[0131] When the delivery box is powered on and the vehicle is in the open state, the controller 11 controls the compressor, hot box fan unit and cold box fan unit to start, and controls the delivery box to operate according to the air conditioning cooling mode, air conditioning heating mode or air conditioning off mode set by the user.

[0132] Step 3: When the current operating mode is air conditioning cooling mode, execute air conditioning cooling control.

[0133] In this embodiment, the controller 11 controls the operation of the fan unit 7 and controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the driving area of ​​the vehicle, so that the cold air formed in the cold box 3 is delivered to the driving area.

[0134] The controller 11 adjusts the operating frequency of the compressor according to the cold box temperature, and controls the air outlet guide plate 5 of the hot box 1 to close or guide air towards the rear of the vehicle according to the hot box temperature.

[0135] In air conditioning cooling mode, the cold box 3 is the primary temperature control target. The compressor operating frequency is adjusted according to the cold box temperature, while the hot box 1 releases excess heat through the opening and closing of the air outlet guide plate 5 and the airflow direction, thus taking into account the cold box 3's need for cold insulation, the driver's area's need for cooling, and the hot box 1's need for heat preservation.

[0136] Preferably, the target operating frequency of the compressor is determined based on the cold box temperature and a preset target temperature range of the cold box, and the compressor is controlled to operate at the target operating frequency.

[0137] When the cold box temperature is higher than the upper limit of the target temperature range of the cold box, a first temperature difference between the cold box temperature and the upper limit of the target temperature range of the cold box is determined. A first frequency adjustment amount is determined according to the first temperature difference and the preset frequency adjustment rule. The smaller value among the current operating frequency of the compressor, the sum of the first frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor.

[0138] When the cold box temperature is lower than the lower limit of the cold box target temperature range, a second temperature difference between the lower limit of the cold box target temperature range and the cold box temperature is determined. Based on the second temperature difference and the preset frequency adjustment rule, a second frequency adjustment amount is determined. The larger value between the compressor's current operating frequency and the difference between the second frequency adjustment amount and the preset minimum operating frequency is determined as the compressor's target operating frequency.

[0139] When the cold box temperature is within the target temperature range of the cold box, the preset reference operating frequency is set as the target operating frequency of the compressor.

[0140] Specifically, the preset frequency adjustment rule can define the correspondence between temperature difference and frequency adjustment amount.

[0141] For example, the preset frequency adjustment step of the compressor can be 5 Hz, and the operating frequency of the compressor can be adjusted every 1℃ to 2℃ according to the temperature difference between the cold box temperature or the hot box temperature and the corresponding target temperature range. The preset reference operating frequency of the compressor can be 40 Hz, the preset maximum operating frequency can be 60 Hz, and the preset minimum operating frequency can be 10 Hz.

[0142] By limiting the maximum and minimum operating frequencies of the compressor's target operating frequency, it is possible to prevent the compressor's target operating frequency from exceeding its allowable operating range. When the compressor's current operating frequency has reached the preset maximum operating frequency, even if the cold box temperature is still higher than the upper limit of the cold box's target temperature range, the compressor's target operating frequency will not exceed the preset maximum operating frequency; when the compressor's current operating frequency has reached the preset minimum operating frequency, even if the cold box temperature is still lower than the lower limit of the cold box's target temperature range, the compressor's target operating frequency will not be lower than the preset minimum operating frequency.

[0143] More preferably, when the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to open and controls the air outlet guide plate 5 of the hot box 1 to guide the air towards the rear of the vehicle, so as to discharge the excess heat in the hot box 1 towards the rear of the vehicle.

[0144] When the temperature of the hot box is not higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to close, so as to reduce the heat loss inside the hot box 1.

[0145] More preferably, the cold box side air supply temperature is obtained, the target operating level of the cold box fan unit is determined based on the cold box side air supply temperature and the preset target temperature range of the cold box side air supply, and the cold box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level.

[0146] When the supply air temperature on the cold box side is lower than the lower limit of the target temperature range for the cold box side supply air, it indicates that the temperature of the cold air delivered to the driving area is low. The preset low-speed operation setting will be set as the target operation setting to reduce the air supply capacity of the cold box fan unit.

[0147] When the supply air temperature on the cold box side is higher than the upper limit of the target temperature range for the cold box side supply air, it indicates that the temperature of the cold air delivered to the driving area is high. The preset high-speed operation level is then set as the target operation level to improve the air delivery capacity of the cold box fan unit.

[0148] When the supply air temperature on the cold box side is within the target temperature range of the cold box side supply air, the preset reference operating level is set as the target operating level.

[0149] For example, the PWM duty cycle corresponding to the preset high-end operating level can be 90%, and the PWM duty cycle corresponding to the preset base operating level can be 60%. The PWM duty cycle corresponding to the preset low-end operating level is lower than the PWM duty cycle corresponding to the preset base operating level, and the specific PWM duty cycle corresponding to the preset low-end operating level can be preset according to the air supply requirements.

[0150] Specifically, in air conditioning cooling mode, the hot box fan unit can operate at a preset benchmark setting. When the air outlet guide plate 5 of the hot box 1 is directed towards the rear of the vehicle, the hot box fan unit drives the air inside the hot box 1 to exchange heat through the condenser pipe 6 and then discharge it towards the rear of the vehicle, thereby improving the heat dissipation efficiency of the hot box 1.

[0151] Step 4: When the current operating mode is air conditioning heating mode, execute air conditioning heating control.

[0152] In this embodiment, the controller 11 controls the operation of the fan unit 7 and controls the air outlet guide plate 5 of the heat box 1 to guide the air towards the driving area of ​​the vehicle, so that the hot air generated in the heat box 1 is delivered to the driving area.

[0153] The controller 11 adjusts the operating frequency of the compressor according to the temperature of the hot box, and controls the air outlet guide plate 5 of the cold box 3 to close or guide the air towards the rear of the vehicle according to the temperature of the cold box.

[0154] In the air conditioning heating mode, the hot box 1 is the primary temperature control target. The compressor operating frequency is adjusted according to the hot box temperature, while the cold box 3 releases excess cold air through the opening and closing of the air outlet guide plate 5 and the direction of airflow, thus taking into account the heat preservation needs of the hot box 1, the heating needs of the driver's area, and the cold preservation needs of the cold box 3.

[0155] Preferably, the target operating frequency of the compressor is determined based on the temperature of the hot box and the preset target temperature range of the hot box, and the compressor is controlled to operate at the target operating frequency.

[0156] When the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, a third temperature difference between the hot box temperature and the upper limit of the target temperature range of the hot box is determined. The third frequency adjustment amount is determined according to the third temperature difference and the preset frequency adjustment rules. The larger value between the current operating frequency of the compressor and the difference between the third frequency adjustment amount and the preset minimum operating frequency is determined as the target operating frequency of the compressor.

[0157] When the temperature of the hot box is lower than the lower limit of the target temperature range of the hot box, a fourth temperature difference is determined between the lower limit of the target temperature range of the hot box and the hot box temperature. The fourth frequency adjustment amount is determined according to the fourth temperature difference and the preset frequency adjustment rule. The smaller value among the current operating frequency of the compressor, the sum of the fourth frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor.

[0158] When the temperature of the hot box is within the target temperature range of the hot box, the preset reference operating frequency is set as the target operating frequency of the compressor.

[0159] Specifically, the preset frequency adjustment rule can define the correspondence between temperature difference and frequency adjustment amount.

[0160] For example, the preset frequency adjustment step of the compressor can be 5 Hz, and the operating frequency of the compressor can be adjusted every 1℃ to 2℃ according to the temperature difference between the cold box temperature or the hot box temperature and the corresponding target temperature range. The preset reference operating frequency of the compressor can be 40 Hz, the preset maximum operating frequency can be 60 Hz, and the preset minimum operating frequency can be 10 Hz.

[0161] More preferably, when the temperature of the cold box is lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to open and controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the rear of the vehicle, so as to discharge the excess cold energy in the cold box 3 towards the rear of the vehicle.

[0162] When the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to close, so as to reduce the loss of cold energy in the cold box 3.

[0163] More preferably, the supply air temperature on the hot box side is obtained, the target operating level of the hot box fan unit is determined based on the supply air temperature on the hot box side and the preset target temperature range of the supply air on the hot box side, and the hot box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level.

[0164] When the supply air temperature on the hot box side is lower than the lower limit of the target temperature range for the supply air on the hot box side, it indicates that the temperature of the hot air delivered to the driving area is low. The preset high-speed operation level is then set as the target operation level to improve the air supply capacity of the hot box fan unit.

[0165] When the supply air temperature on the hot box side is higher than the upper limit of the target temperature range for the supply air on the hot box side, it indicates that the temperature of the hot air delivered to the driving area is too high. The preset low-speed operation setting will be set as the target operation setting to reduce the air supply capacity of the hot box fan unit.

[0166] When the supply air temperature on the hot box side is within the target temperature range of the supply air on the hot box side, the preset reference operating level is set as the target operating level.

[0167] For example, the PWM duty cycle corresponding to the preset high-end operating level can be 90%, and the PWM duty cycle corresponding to the preset base operating level can be 60%. The PWM duty cycle corresponding to the preset low-end operating level is lower than the PWM duty cycle corresponding to the preset base operating level, and the specific PWM duty cycle corresponding to the preset low-end operating level can be preset according to the air supply requirements.

[0168] Specifically, in the air conditioning heating mode, the cold box fan unit can operate according to the preset benchmark operating level. When the air outlet guide plate 5 of the cold box 3 is directed towards the rear of the vehicle, the cold box fan unit drives the air inside the cold box 3 to exchange heat through the evaporator pipe 12 and then discharge it towards the rear of the vehicle, thereby improving the cooling efficiency of the cold box 3.

[0169] Step 5: When the current operating mode is air conditioner off mode, execute low-load heat preservation and cooling control.

[0170] The air conditioning off mode is mainly applicable to scenarios where delivery personnel leave and turn off the vehicle. It can also be used in scenarios where users actively turn off the air conditioning in the driving area but still need to maintain the storage temperature of goods in hot box 1 and cold box 3.

[0171] In this embodiment, the controller 11 controls the compressor to operate at a preset low operating frequency, and controls the hot box fan unit and the cold box fan unit to operate according to the PWM duty cycle corresponding to the preset low load operating level.

[0172] In air conditioning off mode, the air outlet deflectors 5 of hot box 1 and cold box 3 do not direct airflow towards the driver's area. The air outlet deflectors 5 of hot box 1 and cold box 3 are initially kept closed to reduce heat or cold loss.

[0173] When the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to guide the air towards the rear of the vehicle in order to release the excess heat in the hot box 1.

[0174] When the temperature of the hot box is not higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to close.

[0175] When the temperature of the cold box is lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the rear of the vehicle in order to release the excess cold energy in the cold box 3.

[0176] When the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to close.

[0177] Specifically, the preset low operating frequency is lower than the preset reference operating frequency in the air conditioning cooling mode or air conditioning heating mode, and the PWM duty cycle corresponding to the preset low load operating level is lower than the PWM duty cycle corresponding to the preset low operating level.

[0178] For example, the preset low operating frequency can be 10Hz, and the PWM duty cycle corresponding to the preset low load operating level can be 10%. The preset low load operating level is different from the preset low operating level used in air conditioning cooling mode or air conditioning heating mode.

[0179] Step 6: Perform air supply abnormality detection on the hot box air supply channel and the cold box air supply channel.

[0180] In this embodiment, during the operation of the hot box fan unit or the cold box fan unit, the actual wind speed in the corresponding air supply channel is obtained through the corresponding hot box side anemometer or cold box side anemometer.

[0181] The reference wind speed corresponding to the air supply duct is determined based on the current operating speed of the corresponding fan unit. Different operating speeds correspond to different reference wind speeds, wherein the reference wind speed is the normal wind speed corresponding to the corresponding fan unit operating at the current operating speed and the corresponding air supply duct is not obstructed or blocked. The reference wind speeds corresponding to different operating speeds can be pre-determined through experiments and stored in the controller (11).

[0182] When the actual wind speed is lower than the preset ratio of the benchmark wind speed and continues for a preset duration, it is determined that the corresponding air supply channel has an air supply abnormality and a fault alarm message is output.

[0183] When the actual wind speed returns to the reference wind speed, the corresponding air supply anomaly is resolved.

[0184] Preferably, abnormal air supply can be caused by goods or their packaging obstructing the air supply channel, blockage of the air supply channel, reduced air supply capacity of the fan, or other factors that lead to an abnormal decrease in the actual wind speed.

[0185] For example, if the reference wind speed corresponding to the current operating speed is X m / s, when the actual wind speed is lower than X / 2 m / s for 10 seconds, the controller 11 determines that the corresponding air supply channel has an air supply abnormality.

[0186] Fault alarm information may include audible alarm messages and text prompts on the display. For example, the display may show "Air supply failure, please check if the air duct is blocked".

[0187] In addition to abnormal air supply, when the controller 11 detects compressor failure, fan failure or other operational abnormalities, it can also output corresponding fault alarm information.

[0188] By monitoring the actual wind speed in the air supply channel, alarm information can be output in a timely manner when goods or packaging block the air supply channel, the air supply channel becomes blocked, or the fan's air supply capacity is abnormal, thereby reducing the risk of compressor overheating or air supply failure caused by air supply channel blockage.

[0189] Example 3: Application Case To facilitate the explanation of the execution process of each control branch of the present invention, several exemplary detection values ​​are selected in the following application examples. These exemplary detection values ​​are only used to illustrate the control process and do not constitute a limitation on actual operating conditions. In application examples one and two, the preset temperature difference adjustment unit is set to 2℃, and the preset frequency adjustment step size is set to 5Hz. For every preset temperature difference adjustment unit reached, the frequency adjustment amount increases by one preset frequency adjustment step size.

[0190] Application Example 1: Summer Air Conditioning Cooling Operation Example In this application example, the delivery boxes are installed in the vehicle. Refrigerated box 3 is used to store cold drinks or other goods requiring refrigeration, while hot box 1 is used to store meals requiring insulation. The vehicle is in the open position, and the user sets the preset operating mode to air conditioning cooling mode.

[0191] The target temperature range for the cold box is set to 2℃~10℃, the target temperature range for the hot box is set to 45℃~65℃, and the target temperature range for the cold box side air supply is set to 15℃~25℃. The preset reference operating frequency of the compressor is set to 40Hz, the preset maximum operating frequency is set to 60Hz, and the preset minimum operating frequency is set to 10Hz. The preset temperature difference adjustment unit is set to 2℃, and the preset frequency adjustment step is set to 5Hz.

[0192] During one testing cycle, the cold box temperature is 14℃, the hot box temperature is 68℃, the cold box side air supply temperature is 27℃, and the compressor's current operating frequency is 40Hz.

[0193] The cold box temperature of 14℃ is 10℃ higher than the upper limit of the target temperature range, resulting in a first temperature difference of 4℃. Following the rule of increasing the adjustment step by 5Hz for every 2℃ increase in temperature difference, the first frequency adjustment is 10Hz. The sum of the compressor's current operating frequency and the first frequency adjustment is 50Hz. Since 50Hz is lower than the preset maximum operating frequency of 60Hz, 50Hz is determined as the compressor's target operating frequency.

[0194] The controller 11 controls the compressor to run at 50Hz to increase the cooling capacity of the evaporator pipe 12 and controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the driving area.

[0195] The temperature of the hot box is 68℃, which is higher than the upper limit of the target temperature range of 65℃. The controller 11 controls the air outlet guide plate 5 of the hot box 1 to guide the air towards the rear of the vehicle, so as to exhaust some of the heat released by the condenser pipe 6 towards the rear of the vehicle to avoid overheating of the hot box 1. At the same time, the controller 11 controls the hot box fan unit to operate at 60% PWM duty cycle corresponding to the preset benchmark operating position, so as to drive the air in the hot box 1 to be discharged towards the rear of the vehicle.

[0196] The cold box side air supply temperature of 27℃ is higher than the upper limit of the cold box side air supply target temperature range of 25℃. The controller 11 sets the preset high-speed operation level as the target operation level of the cold box fan unit and controls the cold box fan unit to operate at 90% PWM duty cycle to increase the amount of cold air delivered to the driving area.

[0197] When the cold box temperature is subsequently detected to be within the range of 2℃ to 10℃, the controller 11 sets the preset reference operating frequency of 40Hz as the target operating frequency of the compressor; when the cold box side air supply temperature is subsequently detected to be within the range of 15℃ to 25℃, the controller 11 sets the preset reference operating level as the target operating level of the cold box fan unit and controls the cold box fan unit to operate at a PWM duty cycle of 60%; when the hot box temperature is subsequently detected to be no higher than 65℃, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to close to reduce the heat loss inside the hot box 1.

[0198] Application Example 2: Winter Air Conditioning Heating Operation Example In this application example, the vehicle is turned on, and the user sets the preset operating mode to air conditioning heating mode.

[0199] The target temperature range for the hot chamber is set to 45℃~65℃, the target temperature range for the cold chamber is set to 2℃~10℃, and the target temperature range for the side air supply from the hot chamber is set to 28℃~38℃. The preset reference operating frequency of the compressor is set to 40Hz, the preset maximum operating frequency is set to 60Hz, and the preset minimum operating frequency is set to 10Hz. The preset temperature difference adjustment unit is set to 2℃, and the preset frequency adjustment step size is set to 5Hz.

[0200] During one testing cycle, the hot box temperature is 39℃, the cold box temperature is 0℃, the hot box side air supply temperature is 26℃, and the compressor's current operating frequency is 40Hz.

[0201] The hot box temperature of 39℃ is lower than the lower limit of the target temperature range of 45℃, and the fourth temperature difference is 6℃. Following the rule of increasing the adjustment step by 5Hz for every 2℃ increase in temperature difference, the fourth frequency adjustment is 15Hz. The sum of the compressor's current operating frequency and the fourth frequency adjustment is 55Hz. Since 55Hz is lower than the preset maximum operating frequency of 60Hz, 55Hz is determined as the compressor's target operating frequency.

[0202] The controller 11 controls the compressor to run at 55Hz to increase the heat released from the condenser pipe 6 to the heat box 1, and controls the air outlet guide vane 5 of the heat box 1 to guide the air towards the driving area.

[0203] When the cold box temperature is 0℃, which is 2℃ lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide vane 5 of the cold box 3 to guide the air towards the rear of the vehicle, so as to discharge the excess cold air in the cold box 3 towards the rear of the vehicle and prevent the cold box 3 from becoming too cold. At the same time, the controller 11 controls the cold box fan unit to operate at 60% PWM duty cycle corresponding to the preset benchmark operating level, so as to drive the air in the cold box 3 to be discharged towards the rear of the vehicle.

[0204] The supply air temperature on the hot box side is 26℃, which is lower than the lower limit of the target temperature range of 28℃ for the supply air on the hot box side. The controller 11 sets the preset high-level operation level as the target operation level of the hot box fan unit and controls the hot box fan unit to operate at 90% PWM duty cycle.

[0205] When the temperature of the hot box is detected to be within the range of 45℃ to 65℃, the controller 11 sets the preset reference operating frequency of 40Hz as the target operating frequency of the compressor; when the temperature of the hot box side air supply is detected to be within the range of 28℃ to 38℃, the controller 11 controls the hot box fan unit to operate at a PWM duty cycle of 60%; when the temperature of the cold box is detected to be not lower than 2℃, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to close, so as to reduce the loss of cold energy in the cold box 3.

[0206] Application Example 3: Vehicle Shutdown and Air Supply Abnormality Detection Example In this application example, the delivery box remains powered on, while the vehicle switches from the on to the off state. Controller 11 determines the air conditioning off mode as the current operating mode based on the vehicle's off status.

[0207] Controller 11 controls the compressor to operate at a preset low operating frequency of 10Hz, and controls the hot box fan unit and cold box fan unit to operate at a PWM duty cycle of 10%. The air outlet guide vanes 5 of hot box 1 and cold box 3 are initially kept closed, so that the delivery box no longer sends air to the driver's area, while continuing to maintain the storage temperature of goods in hot box 1 and cold box 3.

[0208] When the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to guide the air towards the rear of the vehicle; when the temperature of the hot box returns to no higher than the upper limit of the target temperature range of the hot box, the controller 11 controls the air outlet guide plate 5 of the hot box 1 to close.

[0209] When the temperature of the cold box is lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to guide the air towards the rear of the vehicle; when the temperature of the cold box recovers to a level not lower than the lower limit of the target temperature range of the cold box, the controller 11 controls the air outlet guide plate 5 of the cold box 3 to close.

[0210] During the operation of the fan unit, the controller 11 determines the reference wind speed X of the corresponding air supply duct based on the current operating speed of the fan unit. If the anemometer on the cold box side or the anemometer on the hot box side detects that the actual wind speed in the corresponding air supply duct is lower than X / 2, and this state lasts for 10 seconds, the controller 11 determines that the corresponding air supply duct has an air supply abnormality, outputs an audible alarm message, and displays "Air supply failure, please check if the air duct is blocked" on the display.

[0211] After the delivery personnel clear the goods or packaging that are blocking the air supply channel, if the actual wind speed returns to the reference wind speed X corresponding to the current operating level, the controller 11 will cancel the corresponding abnormal air supply state and stop outputting fault alarm information.

[0212] Through the aforementioned delivery box structure and temperature control method, a low-temperature storage space for the cold box 3 and a high-temperature storage space for the hot box 1 can be simultaneously formed using the same refrigerant circulation loop. Based on the vehicle's start / stop status and preset operating mode, the cold air generated by the cold box 3 or the hot air generated by the hot box 1 can be selectively delivered to the driver's area. Simultaneously, when the hot box 1 becomes overheated or the cold box 3 becomes overcooled, excess heat or cold energy is discharged towards the rear of the vehicle. Thus, under conditions of limited installation space and limited onboard power, separate storage of hot and cold goods, temperature control of the driver's area, and coordinated regulation of the hot and cold ends can be achieved.

[0213] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A delivery box for use in a vehicle, characterized in that, include: Housing, refrigeration cycle assembly, air supply assembly, air guide assembly, detection assembly and controller (11); The box contains a hot box (1) and a cold box (3) separated from each other. The hot box (1) and the cold box (3) are respectively provided with an air inlet (8) and an air outlet. The refrigeration cycle assembly includes a compressor and valve body assembly (2), a condenser pipeline (6) and an evaporator pipeline (12). The condenser pipeline (6) is located in the hot box (1), and the evaporator pipeline (12) is located in the cold box (3) and is connected to the compressor and valve body assembly (2) respectively. The air supply assembly includes a fan unit (7), which is located in the hot box (1) and the cold box (3) respectively, and is used to drive air to enter through the corresponding air inlet (8) and to be discharged through the corresponding air outlet after flowing through the condenser pipe (6) or the evaporator pipe (12). The air guiding assembly includes an air outlet guide plate (5) respectively disposed at each of the air outlets. The air outlet guide plate (5) is used to close the corresponding air outlet or to guide the corresponding hot or cold air to the driving area or rear direction of the vehicle. The detection component includes a temperature sensor group (13) for detecting the internal temperature of the hot box (1) and the cold box (3); The controller (11) is connected to the compressor and valve body assembly (2), the fan unit (7), the air outlet guide plate (5) and the temperature sensor group (13) respectively, and communicates with the vehicle's control device. It is used to control the operating status of the compressor and valve body assembly (2), the operating speed of the fan unit (7) and the opening and closing status and air guiding direction of the air outlet guide plate (5) according to the vehicle's start-stop status, preset operating mode and the internal temperature of the hot box (1) and the cold box (3).

2. A delivery box according to claim 1, characterized in that: The hot box (1) and the cold box (3) are arranged in a mirror image; The box body is made of thermal insulation material. The top of the hot box (1) and the cold box (3) are respectively provided with a box cover (4), and the opening and closing area of ​​the box cover (4) is provided with a sealing strip.

3. A delivery box according to claim 1, characterized in that: The bottom of the heat box (1) is provided with a heat exchange area, which is arranged opposite to the air outlet of the heat box (1). The condenser pipe (6) is arranged in the heat exchange area. The bottom of the cold box (3) is provided with a cold box heat exchange area, which is arranged opposite to the air outlet of the cold box (3), and the evaporator pipe (12) is arranged in the cold box heat exchange area. The air inlet (8) of the hot box (1) is located on the outside of the heat exchange area of ​​the hot box, and the air inlet (8) of the cold box (3) is located on the outside of the heat exchange area of ​​the cold box. Fins are provided on both the condenser pipe (6) and the evaporator pipe (12).

4. A delivery box according to claim 3, characterized in that: The fan unit (7) includes a hot box fan unit and a cold box fan unit; Both the hot box fan unit and the cold box fan unit include three DC fans; The hot box fan unit is located within the heat exchange area of ​​the hot box, and the cold box fan unit is located within the heat exchange area of ​​the cold box; The hot box fan unit is used to drive air to enter through the air inlet (8) of the hot box (1), and after flowing through the condenser pipe (6), it is discharged through the air outlet of the hot box (1). The cold box fan unit is used to drive air to enter through the air inlet (8) of the cold box (3), and after flowing through the evaporator pipe (12), it is discharged through the air outlet of the cold box (3). Both the hot box (1) and the cold box (3) are provided with two pairs of air duct baffles (9). The two pairs of air duct baffles (9) are respectively provided on both sides of the corresponding box body. The air duct baffles (9) are used to define an air supply channel extending from the corresponding air inlet (8) to the corresponding air outlet in the corresponding hot box (1) or cold box (3), and to separate the air supply channel from the goods storage area.

5. A delivery box according to claim 4, characterized in that: The temperature sensor group (13) includes a cold box temperature sensor, a hot box temperature sensor, a cold box side air supply temperature sensor, and a hot box side air supply temperature sensor. The cold box temperature sensor is installed inside the cold box (3), and the hot box temperature sensor is installed inside the hot box (1); The cold box side air supply temperature sensor is located at the air outlet of the cold box (3), and the hot box side air supply temperature sensor is located at the air outlet of the hot box (1). The detection assembly also includes an anemometer group (10), which includes a cold box side anemometer and a hot box side anemometer; The cold box side anemometer is installed in the air supply channel of the cold box (3) and close to the air outlet of the cold box (3) to detect the actual wind speed in the air supply channel of the cold box (3). The anemometer on the hot box side is installed in the air supply channel of the hot box (1) and is located near the air outlet of the hot box (1) to detect the actual wind speed in the air supply channel of the hot box (1).

6. A delivery box according to claim 1, characterized in that: The delivery box also includes a display connected to the controller (11); The display is used to provide parameter settings for the target temperature range of the cold box, the target temperature range of the hot box, the target temperature range of the cold box side air supply, the target temperature range of the hot box side air supply, and the preset operating mode, and to display the operating status and fault alarm information of the delivery box.

7. A delivery box according to claim 1, characterized in that: The compressor and valve body assembly (2) includes a DC inverter compressor, a solenoid valve and an electronic expansion valve, and the refrigeration cycle assembly also includes a dryer filter; The DC inverter compressor, the condenser pipe (6), the dryer filter, the solenoid valve, the electronic expansion valve and the evaporator pipe (12) are connected in sequence to form a closed refrigerant circulation loop; The condenser pipe (6) is used to release heat into the hot box (1), and the evaporator pipe (12) is used to absorb heat from the cold box (3). The delivery box is powered by a vehicle power supply or an independent DC power supply, and the controller (11) is also used to control the power supply to the delivery box.

8. A delivery box according to claim 5, characterized in that: The controller (11) is used to control the operation of the compressor and valve body assembly (2), the hot box fan unit, the cold box fan unit and the air outlet guide plate (5) according to the preset operation mode; The preset operating modes include air conditioning cooling mode, air conditioning heating mode, and air conditioning off mode; In the air conditioning cooling mode, the controller (11) is used to adjust the operating frequency of the compressor in the compressor and valve body assembly (2) according to the cold box temperature, adjust the operating level of the cold box fan unit according to the cold box side air supply temperature, control the air outlet guide plate (5) of the cold box (3) to guide the air towards the driving area of ​​the vehicle, and control the air outlet guide plate (5) of the hot box (1) to close or guide the air towards the rear of the vehicle according to the hot box temperature. In the air conditioning heating mode, the controller (11) is used to adjust the operating frequency of the compressor according to the temperature of the hot box, adjust the operating level of the hot box fan unit according to the temperature of the hot box side air supply, control the air outlet guide plate (5) of the hot box (1) to guide the air towards the driving area of ​​the vehicle, and control the air outlet guide plate (5) of the cold box (3) to close or guide the air towards the rear of the vehicle according to the temperature of the cold box. In the air conditioning off mode, the controller (11) controls the compressor, the hot box fan unit and the cold box fan unit to operate in a preset low load state, and controls the corresponding air outlet guide plate (5) to close or guide air towards the rear of the vehicle according to the hot box temperature and the cold box temperature.

9. A temperature control method for a delivery box, characterized in that, An implementation of a delivery box according to any one of claims 1-8 includes: When the delivery box is powered on, the vehicle's start / stop status, preset operating mode, cold box temperature, and hot box temperature are obtained. The preset operating modes include air conditioning cooling mode, air conditioning heating mode, and air conditioning off mode. The current operating mode is determined based on the vehicle's start / stop status and the preset operating mode; When the current operating mode is the air conditioning cooling mode, the fan unit (7) is controlled to operate, the air outlet guide plate (5) of the cold box (3) is controlled to guide the air towards the driving area of ​​the vehicle, the operating frequency of the compressor in the compressor and valve body assembly (2) is adjusted according to the temperature of the cold box, and the air outlet guide plate (5) of the hot box (1) is controlled to close or guide the air towards the rear of the vehicle according to the temperature of the hot box. When the current operating mode is the air conditioning heating mode, the fan unit (7) is controlled to operate, the air outlet guide plate (5) of the heat box (1) is controlled to guide the air towards the driving area of ​​the vehicle, the operating frequency of the compressor is adjusted according to the temperature of the heat box, and the air outlet guide plate (5) of the cold box (3) is controlled to close or guide the air towards the rear of the vehicle according to the temperature of the cold box. When the current operating mode is the air conditioning off mode, the compressor and the fan unit (7) are controlled to operate in a preset low load state, and the corresponding air outlet guide plate (5) is controlled to close or guide air towards the rear of the vehicle according to the cold box temperature and the hot box temperature.

10. A temperature control method for a delivery box according to claim 9, characterized in that: Determining the current operating mode based on the vehicle's start / stop status and the preset operating mode includes: When the vehicle is in the off state, the air conditioning off mode is determined as the current operating mode; When the vehicle is in the powered-on state, the preset operating mode is determined as the current operating mode.

11. The temperature control method for a delivery box according to claim 9, characterized in that: When the current operating mode is the air conditioning cooling mode, the target operating frequency of the compressor is determined based on the cold box temperature and the preset target cold box temperature range, and the compressor is controlled to operate at the target operating frequency, wherein: When the temperature of the cold box is higher than the upper limit of the target temperature range of the cold box, a first temperature difference between the cold box temperature and the upper limit of the target temperature range of the cold box is determined. A first frequency adjustment amount is determined according to the first temperature difference and a preset frequency adjustment rule. The smaller value between the current operating frequency of the compressor, the sum of the first frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor. When the temperature of the cold box is lower than the lower limit of the target temperature range of the cold box, a second temperature difference between the lower limit of the target temperature range of the cold box and the temperature of the cold box is determined. A second frequency adjustment amount is determined according to the second temperature difference and the preset frequency adjustment rule. The larger value between the current operating frequency of the compressor and the difference between the second frequency adjustment amount and the preset minimum operating frequency is determined as the target operating frequency of the compressor. When the temperature of the cold box is within the target temperature range of the cold box, the preset reference operating frequency is determined as the target operating frequency of the compressor; When the temperature of the hot box is higher than the upper limit of the preset target temperature range of the hot box, the air outlet guide plate (5) of the hot box (1) is controlled to guide the air towards the rear of the vehicle. When the temperature of the hot box is not higher than the upper limit of the target temperature range of the hot box, the air outlet guide plate (5) of the hot box (1) is closed.

12. The temperature control method for a delivery box according to claim 11, characterized in that: Obtain the side air supply temperature of the cold box; When the current operating mode is the air conditioning cooling mode, the target operating level of the cold box fan unit is determined based on the cold box side supply air temperature and the preset cold box side supply air target temperature range, and the cold box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level, wherein: When the supply air temperature on the cold box side is lower than the lower limit of the target temperature range for the supply air on the cold box side, the preset low-speed operation level is determined as the target operation level. When the supply air temperature on the cold box side is higher than the upper limit of the target temperature range of the supply air on the cold box side, the preset high-level operation setting is determined as the target operation setting. When the supply air temperature on the cold box side is within the target supply air temperature range of the cold box side, the preset benchmark operating level is determined as the target operating level.

13. The temperature control method for a delivery box according to claim 9, characterized in that: When the current operating mode is the air conditioning heating mode, the target operating frequency of the compressor is determined based on the heat box temperature and the preset target heat box temperature range, and the compressor is controlled to operate at the target operating frequency, wherein: When the temperature of the hot box is higher than the upper limit of the target temperature range of the hot box, a third temperature difference between the hot box temperature and the upper limit of the target temperature range of the hot box is determined. A third frequency adjustment amount is determined according to the third temperature difference and the preset frequency adjustment rule. The larger value between the current operating frequency of the compressor and the difference of the third frequency adjustment amount and the preset minimum operating frequency is determined as the target operating frequency of the compressor. When the temperature of the hot box is lower than the lower limit of the target temperature range of the hot box, a fourth temperature difference between the lower limit of the target temperature range of the hot box and the temperature of the hot box is determined. A fourth frequency adjustment amount is determined according to the fourth temperature difference and the preset frequency adjustment rule. The smaller value between the current operating frequency of the compressor, the sum of the fourth frequency adjustment amount, and the preset maximum operating frequency is determined as the target operating frequency of the compressor. When the temperature of the hot box is within the target temperature range of the hot box, the preset reference operating frequency is determined as the target operating frequency of the compressor; When the temperature of the cold box is lower than the lower limit of the preset target temperature range of the cold box, the air outlet guide plate (5) of the cold box (3) is controlled to guide the air towards the rear of the vehicle. When the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the air outlet guide plate (5) of the cold box (3) is closed.

14. The temperature control method for a delivery box according to claim 13, characterized in that: Obtain the side air supply temperature of the hot box; When the current operating mode is the air conditioning heating mode, the target operating level of the hot box fan unit is determined based on the hot box side supply air temperature and the preset hot box side supply air target temperature range, and the hot box fan unit is controlled to operate according to the PWM duty cycle corresponding to the target operating level, wherein: When the supply air temperature on the hot box side is lower than the lower limit of the target temperature range of the supply air on the hot box side, the preset high-level operation setting is determined as the target operation setting. When the supply air temperature on the hot box side is higher than the upper limit of the target temperature range of the supply air on the hot box side, the preset low-speed operation level is determined as the target operation level. When the supply air temperature on the hot box side is within the target temperature range of the supply air on the hot box side, the preset benchmark operating level is determined as the target operating level.

15. A temperature control method for a delivery box according to claim 9, characterized in that: When the current operating mode is the air conditioner off mode, the compressor is controlled to run at a preset low operating frequency, and the hot box fan unit and the cold box fan unit are controlled to run according to the PWM duty cycle corresponding to the preset low load operating level. When the temperature of the hot box is higher than the upper limit of the preset target temperature range of the hot box, the air outlet guide plate (5) of the hot box (1) is controlled to guide the air towards the rear of the vehicle. When the temperature of the hot box is not higher than the upper limit of the target temperature range of the hot box, the air outlet guide plate (5) of the hot box (1) is closed. When the temperature of the cold box is lower than the lower limit of the preset target temperature range of the cold box, the air outlet guide plate (5) of the cold box (3) is controlled to guide the air towards the rear of the vehicle. When the temperature of the cold box is not lower than the lower limit of the target temperature range of the cold box, the air outlet guide plate (5) of the cold box (3) is closed.

16. The temperature control method for a delivery box according to claim 9, characterized in that: The temperature control method also includes: During the operation of the hot box fan unit or the cold box fan unit, the actual wind speed in the corresponding air supply channel is obtained through the corresponding hot box side anemometer or cold box side anemometer. The reference wind speed corresponding to the air supply channel is determined based on the current operating speed of the corresponding fan unit. When the actual wind speed is lower than a preset percentage of the reference wind speed and continues for a preset duration, it is determined that the air supply channel has an air supply abnormality and a fault alarm message is output. When the actual wind speed returns to the reference wind speed, the air supply abnormality is resolved.

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