Cold chain unit delivery box with independent cold storage space

Abstract

The present invention discloses a cold chain unit delivery box with independent cold storage space, including a machine box body and the cold storage space arranged in the machine box body, a cold storage device is arranged in the cold storage space, and an evaporator with a fan is arranged in the machine box; it also includes a compressor connected to the cold storage device and the outlet ends of the evaporator with a fan, and a condenser connected to the outlet end of the compressor, and the refrigerant outlet end of the condenser is connected to the expansion valve. The present invention can better ensure the temperature management of the cargo space, avoid the risk of no temperature control for cold chain cargo due to failure of the cold air fan system, and very well retain the ability of the cold plate to achieve more precise temperature difference control and temperature maintenance, avoid the problem of large temperature difference in the temperature control process when the cold air fan is always used for refrigeration and temperature maintenance, and can meet the distribution needs with more precise temperature requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of cold chain distribution, and in particular relates to a cold chain unit distribution box with an independent cold storage space. Background Art

[0002] Cold chain transportation requires maintaining a low temperature in all transport links, including medium and long-distance transportation and short-distance distribution. It mainly involves low-temperature transportation tools such as railway refrigerated trucks, refrigerated cars, refrigerated ships, and refrigerated containers. During refrigerated transportation, temperature increases or large temperature fluctuations are one of the main reasons for the deterioration of cargo quality. Therefore, the transportation tool should have good thermal insulation performance. While maintaining the specified low temperature, it is also necessary to maintain a stable temperature. In other words, during the transportation of cold chain goods, the temperature of goods that need to be transported under certain temperature conditions must be precisely controlled.

[0003] The following are the commonly used temperature control methods: (1) The cold chain unit delivery box is equipped with a cold air blower, which blows cold air into the cargo space; (2) The cold chain unit delivery box is equipped with a cold storage plate set in the cargo space, and the cold storage plate is charged with cold air by the cold chain unit delivery box. The cold chain unit delivery box with a cold storage plate can work by the cold storage plate alone, or by the cold air blower blowing cold air into the cargo space alone, or the cold storage plate and the cold air blower can work at the same time; (3) The cold chain unit delivery box is equipped with a cold storage plate set in the cargo space, and the cold storage plate is frozen and charged with cold air by an external refrigeration device, and the box itself does not have any refrigeration equipment.

[0004] In actual use, the above method has the following disadvantages:

[0005] (1) When the cold chain unit delivery box is equipped with a cold air cooler to control the temperature of cold chain goods, once the power supply of the cold air cooler system fails, there will be a risk of no temperature control for the cold chain goods; (2) The cold chain unit delivery box is equipped with both a cold air cooler and a cold storage plate. When there are goods and the cold storage plate needs to be charged with cold, the temperature charged to the cold storage plate is much lower than the temperature that the goods can withstand during transportation, causing freezing damage to the goods; (3) When the cold chain unit delivery box is equipped with a cold storage plate to control the temperature of cold chain goods, the temperature difference between the cold storage plate and the goods will gradually decrease. When there is no condition to cool the cold plate again, the cold chain unit delivery box will lose the ability to control the temperature of the cold chain goods. Summary of the invention

[0006] In order to solve the above-mentioned problems in the prior art, the purpose of the present invention is to provide a cold chain unit delivery box with an independent cold storage space, which better solves the problem that the existing cold chain unit delivery box has both an air cooler and a cold storage plate to control the temperature of the cold chain goods. When the cold storage plate needs to be cooled by the air cooler, the temperature of the cooling cold storage plate is much lower than the control temperature of the cold chain goods, causing freezing damage to the cold chain goods; and the cold chain unit delivery box has the defect that the temperature inside the box cannot be maintained for a long time after a power outage.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is a cold chain unit distribution box with an independent cold storage space, comprising a machine box and a cold storage space arranged in the machine box, a cold storage device is arranged in the cold storage space, an evaporator with a fan is arranged in the machine box, and the evaporator with a fan is used to provide forced convection cold air to the cargo space; it also includes a compressor connected to the cold storage device and the outlet end of the evaporator with a fan, and a condenser connected to the outlet end of the compressor, the refrigerant outlet end of the condenser is connected to an expansion valve, the expansion valve is used to control the pressure and temperature of the refrigerant, and the expansion valve is respectively connected to the inlet end of the evaporator with a fan or the inlet end of the cold storage device through a reversing valve.

[0008] Furthermore, the evaporator with a fan includes a fan and an evaporator, the refrigerant inlet end of the evaporator with a fan is connected to the reversing valve, and the outlet end of the evaporator is connected to the inlet end of the compressor.

[0009] Furthermore, the cold storage device is composed of a plurality of cold storage devices, and the plurality of cold storage devices are arranged at equal intervals or at unequal intervals; they can also be arranged at any angle.

[0010] Furthermore, a fan space is provided in the machine housing, the evaporator with a fan is provided in the fan space, and a circulating air outlet and a circulating air inlet connected to the cargo space are provided in the fan space.

[0011] Furthermore, the fan space and the cold storage space are arranged adjacent to each other, and are separated from each other by a partition. A first rotatable baffle is provided at one end of the partition close to the circulating air inlet, and the communication between the circulating air inlet and the fan space or the cold storage space is achieved by adjusting the angle of the first rotatable baffle.

[0012] Furthermore, a second rotatable baffle is provided at the other end of the partition, and the second rotatable baffle is used to connect or separate the fan space and the cold storage space. When the circulating air inlet is connected with the cold storage space, the cold storage space and the fan space are connected by rotating the second rotatable baffle. The circulating air enters from the circulating air inlet, flows through the cold storage plate and the fan space in turn, and then flows out from the circulating air outlet.

[0013] Furthermore, a heat pump space is also provided in the machine box, and all components constituting the heat pump system except the evaporator are provided in the heat pump space.

[0014] Furthermore, the heat pump space and the cold storage space are arranged adjacent to each other, and the heat pump space and the cold storage space are sealed and insulated and separated from each other.

[0015] Furthermore, the cold storage device is a cold storage plate or any other cold storage container. Furthermore, the evaporator with a fan is arranged at the circulating air outlet position connected to the cargo space.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects: the present invention adopts a combination of an evaporator with a fan and a cold storage device, which can better ensure the temperature management of the cargo space, avoid the risk of no temperature control for cold chain goods due to failure of the cold air fan system, and very well retain the ability of the cold plate to achieve more precise temperature difference control and temperature maintenance, avoiding the problem of large temperature difference in the temperature control process when using cold air fans for refrigeration and temperature maintenance, and can meet the distribution needs with more precise temperature requirements; in addition, by setting a structure for charging the cold storage device, the cold storage device can be effectively supplemented with cold energy. At the same time, because the cold storage device is arranged in an independent cold storage space, the cold storage space and the cold chain cargo space are relatively independent, which not only realizes the cold storage of the cold storage device, but also effectively solves the freezing damage to the cold chain goods when the cold storage device is cooled by the cold air fan.

[0017] Furthermore, in the present invention, the fan space, the cold storage space and the cold chain cargo space are reasonably configured, and the cold storage device is not set in the cold chain cargo space, so as to maximize the occupancy rate of the cold chain cargo space. At the same time, through the reasonable design of the present invention, after the temperature control of the cold chain cargo reaches the predetermined target, the cold storage device is switched to store cold at a lower temperature within a certain period of time. Once the power supply of the heat pump system fails, the cold storage device can continue to blow cold air to the cold chain cargo space, greatly extending the temperature management time of the refrigeration space to the cargo space.

[0018] Furthermore, compared with the prior art, the technical solution proposed by the present invention has a higher pre-cooling efficiency. When the air cooler and the cold storage device simultaneously blow cold air into the space, the pre-cooling time of the cold chain cargo space can be effectively reduced. When the power supply of the heat pump system is docked at the cold chain unit delivery box, the cold storage device is stored with a fixed power supply, which reduces the use of mobile power supplies and can effectively extend the mobile use time of the mobile power supply.

[0019] Furthermore, the present invention not only solves the problem of damage to cold chain goods when cooling the cold storage device in the existing cold chain unit delivery box, but also effectively expands the cargo space; moreover, the air cooler and the cold storage device can be used separately or simultaneously according to the actual usage needs of the user, thereby increasing the temperature control means for the cold chain goods. After flexible application, the solution of the present invention can not only solve the problem of long pre-cooling time for cold chain goods, but also effectively extend the temperature management time of the cold chain goods space, thereby enhancing the refrigeration function of the cold chain delivery box.

[0020] Furthermore, the present invention increases and strengthens the use of fixed power sources, turning mobile power sources into auxiliary means of power supply, which not only reduces the risk of power outages, but also saves fuel used when the mobile power source is powered, and can effectively improve the long-distance transportation capacity of the cold chain unit delivery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the delivery box of the present invention in a state where the evaporator with a fan is working alone.

[0022] Figure 2 It is a schematic diagram of the state of the delivery box of the present invention when the temperature is maintained by the cold storage plate. In the figure, the fan of the evaporator with a fan is working, and the evaporator is not working.

[0023] Figure 3 Schematic diagram of the state where the evaporator with fan and the cold storage plate work simultaneously to control the temperature of the cargo space.

[0024] Figure 4 The figure is a schematic diagram of the connection relationship between components in a certain embodiment of the present invention.

[0025] Figure 5 It is a schematic diagram of the connection relationship between components in another embodiment of the present invention.

[0026] In the attached drawings, 1-evaporator, 2-cold storage device, 3-condenser, 4-compressor, 5-expansion valve, 6-reversing valve, 7-fan, 8-first rotatable baffle, 9-second rotatable baffle, 10-cargo space, 11-machine box. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] like Figure 1-5As shown, a cold chain unit delivery box with an independent cold storage space proposed by the present invention comprises a machine box 11 and a cold storage space arranged in the machine box 11, a cold storage device 2 is arranged in the cold storage space, and the cold storage device 2 is a cold storage plate or any other cold storage container; a fan space is also arranged in the machine box 11, an evaporator 1 with a fan 7 is arranged in the fan space, and a circulating air outlet and a circulating air inlet connected to the cargo space 10 are opened on the fan space. In a certain embodiment of the present invention, the evaporator 1 with the fan 7 is arranged at the circulating air outlet position connected to the cargo space 10; through the arrangement of the independent cold storage space of the present invention, , effectively avoiding damage to the goods in the cargo space 10 caused by the cooling of the cold storage device 2. Because in the current cold chain transportation, when the cold storage plate needs to be cooled by a cold air blower, the temperature of the cooling cold storage plate, such as about -35°C for freezing and about -15°C for refrigeration, is much lower than the control temperature of the cold chain goods, such as -18°C for freezing and about 5°C for refrigeration, causing freezing damage to the cold chain goods; and an independent cold storage space is adopted, and the humidity of the warehouse is slightly affected when storing cold, so that the temperature control of the warehouse can be more precise; when the diesel engine used for power generation breaks down during transportation, the cold storage device can cool the warehouse and provide time for emergency repairs.

[0029] The evaporator 1 with fan 7 includes a fan 7 and an evaporator, wherein the refrigerant inlet end of the evaporator with fan 7 is connected to the reversing valve 6, and the outlet end of the evaporator is connected to the inlet end of the compressor 4, and the evaporator 1 with fan 7 is used to provide forced convection cold air to the cargo space 10; it also includes a compressor 4 connected to the cold storage device 2 and the outlet end of the evaporator with fan 7, and a condenser 3 connected to the outlet end of the compressor 4, the refrigerant outlet end of the condenser 3 is connected to the expansion valve 5, and the expansion valve 5 is used to control the pressure and temperature of the refrigerant, and the expansion valve 5 is respectively connected to the inlet end of the evaporator 1 with fan 7 or the inlet end of the cold storage device 2 through the reversing valve 6. In a certain embodiment of the present invention, the fan space and the cold storage space are arranged adjacent to each other, and the fan space and the cold storage space are separated by a partition, and a first rotatable baffle 8 is provided at one end of the partition close to the circulating air inlet, and the connection between the circulating air inlet and the fan space or the cold storage space is achieved by adjusting the angle of the first rotatable baffle 8; an air flow channel connecting the fan space and the cold storage space is also provided on the partition, and a second rotatable baffle 9 is provided at the other end of the partition, and the second rotatable baffle 9 is used to control the opening and closing of the air flow channel, so as to connect or separate the fan space and the cold storage space; the above-mentioned first rotatable baffle 8 and the second rotatable baffle 9 can be rotated to any angle.

[0030] like Figure 1As shown, the air cooler (i.e., the evaporator (1) with the fan 7) is used to work alone to cool the cargo space 10, which is a conventional normal refrigeration; by adjusting the first rotatable baffle 8, the circulating air inlet is connected to the fan space, and the second rotatable baffle 9 is in a closed air flow channel, and the evaporator with the fan delivers forced convection cold air to the cargo space 10.

[0031] like Figure 2 As shown, it is a schematic diagram of the state when the delivery box is in a state where the temperature is maintained by the cold storage plate. In the figure, the fan in the evaporator with a fan is working, and the evaporator is not working. By adjusting the first rotatable baffle 8, the circulating air inlet is connected to the cold storage space, and the second rotatable baffle 9 is rotated to open the air flow channel, and the circulating air enters from the circulating air inlet, flows through the cold storage plate and the fan space in turn, and is blown by the fan to assist the circulating air to flow out from the circulating air outlet; when the cold storage device in the cold storage space is used to maintain the temperature, it can not only solve the problem of long pre-cooling time for cold chain goods, but also effectively extend the temperature management time of the cold chain goods space, so that the refrigeration function of the cold chain delivery box is enhanced, and the temperature maintenance of the cold storage device has the characteristics of small fluctuation compared with the cold air fan, and the temperature maintenance effect is better.

[0032] like Figure 3 As shown, the evaporator with a fan and the cold storage plate work simultaneously to control the temperature of the cargo space 10. In this state, if the user needs to quickly control the temperature of the cargo space 10 so that the temperature of the cargo space 10 meets the requirement, the cold air fan and the cold storage plate are controlled to work simultaneously to control the temperature of the cargo space 10, which can save time.

[0033] In one embodiment of the present invention, Figure 4 and Figure 5 As shown, the cold storage device 2 is composed of a plurality of cold storage devices, and the plurality of cold storage devices 2 are arranged at equal intervals or unequal intervals; they can also be arranged at any angle, for example, the cold storage device is a cold storage plate, and the cold storage plate is arranged in the cold storage space parallel to the axial direction of the vehicle body; the cold storage device is a cold storage plate, and the cold storage plate is arranged in the cold storage space perpendicular to the axial direction of the vehicle body; a heat pump space is also provided in the machine box 11, and all components constituting the heat pump system except the evaporator are provided in the heat pump space, and the heat pump space is adjacent to the cold storage space, and the heat pump space and the cold storage space are sealed and insulated.

[0034] Through the above-mentioned structural setting, the present invention can not only realize the ability of the cold chain unit delivery box to maintain the temperature in the box for a long time after a power outage, but also can perform a variety of operations according to the specific usage requirements of the user.

Claims

1. A cold chain unit delivery box with independent cold storage space, characterized in that: The invention comprises a machine box (11) and a cold storage space arranged in the machine box (11), wherein a cold storage device (2) is arranged in the cold storage space, wherein an evaporator (1) with a fan (7) is arranged in the machine box (11), wherein the evaporator (1) with a fan (7) is used to provide forced convection cold air to the cargo space (10); and further comprises a compressor (4) connected to the outlet ends of the cold storage device (2) and the evaporator with a fan (7), and a condenser (3) connected to the outlet end of the compressor (4), wherein the refrigerant outlet end of the condenser (3) is connected to an expansion valve (5), wherein the expansion valve (5) is used to control the pressure and temperature of the refrigerant, and wherein the expansion valve (5) is respectively connected to the inlet end of the evaporator (1) with a fan (7) or the inlet end of the cold storage device (2) through a reversing valve (6); wherein the machine box (11) is provided with a fan space, wherein the evaporator (1) with a fan (7) is used to provide forced convection cold air to the cargo space (10); and wherein the compressor (4) is connected to the outlet end of the evaporator with a fan (7), wherein the condenser (3) is connected to the outlet end of the compressor (4), wherein the refrigerant outlet end of the condenser (3) is connected to an expansion valve (5), wherein the expansion valve (5) is used to control the pressure and temperature of the refrigerant, and wherein the expansion valve (5) is respectively connected to the inlet end of the evaporator (1) with a fan (7) or the inlet end of the cold storage device (2) through a reversing valve (6); The evaporator (1) of the fan (7) is arranged in the fan space, and a circulating air outlet and a circulating air inlet connected to the cargo space (10) are provided in the fan space; the fan space and the cold storage space are arranged adjacent to each other, and the fan space and the cold storage space are separated by a partition, and a first rotatable baffle (8) is arranged at one end of the partition close to the circulating air inlet, and the communication between the circulating air inlet and the fan space or the cold storage space is achieved by adjusting the angle of the first rotatable baffle (8); a second rotatable baffle (9) is arranged at the other end of the partition, and the second rotatable baffle (9) is used to connect or separate the fan space and the cold storage space. When the circulating air inlet is connected to the cold storage space, the cold storage space and the fan space are connected by rotating the second rotatable baffle (9), and the circulating air enters from the circulating air inlet, flows through the cold storage plate and the fan space in sequence, and then flows out from the circulating air outlet.

2. The cold chain unit delivery box with independent cold storage space according to claim 1, characterized in that: The evaporator (1) with a fan (7) comprises a fan (7) and an evaporator, wherein the refrigerant inlet end of the evaporator with a fan (7) is connected to a reversing valve (6), and the outlet end of the evaporator is connected to the inlet end of a compressor (4).

3. The cold chain unit delivery box with independent cold storage space according to claim 1 or 2, characterized in that: The cold storage device (2) is composed of a plurality of cold storage devices, and the plurality of cold storage devices (2) are arranged at equal intervals.

4. The cold chain unit delivery box with independent cold storage space according to claim 1 or 2, characterized in that: The cold storage device (2) is composed of a plurality of cold storage devices, and the plurality of cold storage devices (2) are arranged at unequal intervals.

5. The cold chain unit delivery box with independent cold storage space according to claim 1 or 2, characterized in that: The cold storage device (2) is composed of a plurality of cold storage devices, and the plurality of cold storage devices (2) are arranged at arbitrary angles.

6. The cold chain unit delivery box with independent cold storage space according to claim 1, characterized in that: A heat pump space is also provided in the machine box (11), and all components constituting the heat pump system except the evaporator are provided in the heat pump space.

7. The cold chain unit delivery box with independent cold storage space according to claim 6, characterized in that: The heat pump space is adjacent to the cold storage space, and the heat pump space is sealed and insulated from the cold storage space.

8. The cold chain unit delivery box with independent cold storage space according to claim 1, characterized in that: The cold storage device (2) is a cold storage plate.

9. The cold chain unit delivery box with independent cold storage space according to claim 1, characterized in that: The evaporator (1) with a fan (7) is arranged at a circulating air outlet position connected to the cargo space (10).

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