Multi-point air supply type air duct assembly, phase change refrigeration system and refrigeration equipment

Abstract

The utility model relates to the technical field of refrigeration equipment, and provides a multi-point air supply type air duct assembly which comprises a cold source shell, a heat exchanger and a heat exchanger. A refrigeration chamber and a cold supply chamber are respectively formed on two sides of the partition plate; a communicating hole is formed in the partition plate; the evaporator is arranged in the refrigeration chamber; the centrifugal fan is arranged in the cold supply cavity; the wind arm pipes are uniformly and annularly arranged on the periphery of the cold source shell; an air supply duct and an air return duct which are mutually separated are arranged in the air arm pipe; the air supply duct communicates with the cold supply cavity, and the air return duct communicates with the refrigeration cavity. Therefore, the air arm pipes are evenly and annularly arranged on the periphery of the cold source shell, the distances between the air supply outlets and the cold source and the distances between the air return inlets and the cold source are equal, and the airflow speed and the temperature of the air supply outlets are balanced. The utility model further provides a phase change refrigeration system, refrigeration is achieved in a liquefied gas phase change mode, compression refrigeration is replaced, and the structural composition of the refrigeration system is reduced. The utility model further provides refrigeration equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and in particular relates to a multi-point air supply type air duct component, a phase change refrigeration system and refrigeration equipment. Background Art

[0002] As disclosed in Chinese patent CN219624312U, the air duct components and evaporators of existing refrigerators, freezers and other equipment are usually arranged on the back of the inner tank, and multiple air outlets and air inlets are opened in each compartment to form a circulation. The distance between the cold source and each air outlet of this structure is inconsistent, and the distribution of each air outlet and air inlet is uneven, resulting in uneven air volume, air flow temperature, etc. at each air outlet, which in turn affects the balance of the indoor temperature of the storage room.

[0003] The structure and principle of the refrigeration system of existing refrigeration equipment are roughly as follows: the compressor sends out high-temperature and high-pressure gaseous refrigerant, which is cooled and condensed into liquid by the condenser, then absorbs heat and vaporizes in the evaporator, and finally returns to the compressor. The refrigeration system has many components, which occupy storage space. When the compressor is operating, it is noisy and energy-intensive. The refrigerant is polluting, has low refrigeration efficiency, and a small temperature control range. For industrial production and scientific research units with large-scale or ultra-low temperature refrigeration needs, the capacity and efficiency of the existing refrigeration system are not matched.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the utility model mainly provides a multi-point air supply type air duct assembly to solve the technical problem of uneven air volume and temperature at each air outlet of the existing air duct.

[0006] In order to solve the above problems, the utility model provides a multi-point air supply type air duct assembly, comprising:

[0007] The cold source shell has a partition plate inside; the two sides of the partition plate respectively form a refrigeration chamber and a cold delivery chamber; the partition plate is provided with a connecting hole;

[0008] An evaporator is arranged in the refrigeration chamber and has a heat exchange tube for generating cold energy;

[0009] A centrifugal fan is arranged in the cold delivery chamber and is used to absorb the cold energy generated by the refrigeration chamber and deliver the cold energy out;

[0010] A plurality of wind arm pipes are evenly arranged around the periphery of the cold source shell; the wind arm pipes have a supply air duct and a return air duct separated from each other; the supply air duct is connected to the cold supply chamber, and the return air duct is connected to the refrigeration chamber;

[0011] An air supply port is provided on a side wall of the air supply duct;

[0012] The return air outlet is opened on the side wall of the return air duct.

[0013] According to the multi-point air supply type air duct assembly of the utility model, the centrifugal fan has a blade group and a motor driving the blade group to rotate; the blade group is arranged in the cold supply chamber, and the motor is arranged outside the cold source shell.

[0014] According to the multi-point air supply type air duct assembly of the utility model, the air intake port of the centrifugal fan is directly opposite to the connecting hole.

[0015] According to the multi-point air supply type air duct assembly of the utility model, each air arm pipe is radially distributed around the cold source shell.

[0016] According to the multi-point air supply type air duct assembly of the utility model, the cross-sectional shape of the air supply duct is rectangular; an air supply port is respectively provided on two opposite side walls of the air supply duct.

[0017] According to the multi-point air supply type air duct assembly of the utility model, the length of the return air duct is smaller than the length of the air supply duct.

[0018] A phase change refrigeration system comprises a refrigerant storage tank containing liquefied gas; the refrigerant storage tank is connected to the air inlet of the heat exchange tube of the air duct assembly.

[0019] According to the phase change refrigeration system of the utility model, the refrigerant storage tank is a self-pressurizing storage tank; the refrigerant storage tank is connected to the air inlet of the heat exchange tube through the solenoid valve, and the air outlet of the heat exchange tube is connected to the pressure relief valve.

[0020] A refrigeration device comprises a box body; an air duct component of the phase change refrigeration system is installed in the box body; and the refrigerant storage tank is arranged outside the box body.

[0021] The refrigeration equipment according to the utility model is a refrigerator, a freezer or a cold storage.

[0022] In summary, the multi-point air supply duct assembly of the utility model makes the distance between each air supply port and return air port and the cold source equal by evenly arranging each air arm pipe around the cold source shell; coupled with the uniform air outlet characteristics of the centrifugal fan, the air flow velocity and temperature of each air supply port are balanced, thereby optimizing the temperature control performance in the refrigeration space. The utility model also provides a refrigeration system, which uses liquefied gas phase change to replace compression refrigeration and reduce the structural composition of the refrigeration system. It can achieve ultra-low temperature refrigeration, high refrigeration efficiency and a large temperature control range. The utility model also provides a refrigeration device, which improves the effective utilization of space in the box, and has low energy consumption and low noise during refrigeration operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a structural schematic diagram of the air duct assembly of the utility model;

[0024] Figure 2 yes Figure 1 A side cross-sectional structural schematic diagram of an embodiment of the present invention;

[0025] Figure 3 yes Figure 1 A side cross-sectional structural schematic diagram of an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the phase change refrigeration system of the utility model;

[0027] Figure 5 It is a structural schematic diagram of the refrigeration equipment of the utility model;

[0028] Figure 6 yes Figure 5 The main view;

[0029] In the figure: 1-cold source shell, 11-wind arm pipe, 12-air supply port, 13-return air port, 14-refrigeration chamber, 15-cold supply chamber, 16-partition plate, 17-air supply duct, 18-return air duct, 19-connecting hole; 2-centrifugal fan, 21-blade group, 22-motor; 3-evaporator, 31-heat exchange tube; 4-refrigerant storage tank, 5-box. DETAILED DESCRIPTION

[0030] See also Figure 1 The utility model provides a multi-point air supply type air duct assembly, comprising

[0031] Cold source shell 1, combined Figure 2 , a partition plate 16 is provided inside; the two sides of the partition plate 16 respectively form a refrigeration chamber 14 and a cold delivery chamber 15; and then combined Figure 3 , the partition plate 16 is provided with a communicating hole 19;

[0032] The evaporator 3 is arranged in the refrigeration chamber 14 and has a heat exchange tube 31; a refrigerant can be circulated in the heat exchange tube 31 to generate cold in the refrigeration chamber 14;

[0033] The centrifugal fan 2 is arranged in the cold delivery chamber 15 and is used to absorb the cold energy generated by the refrigeration chamber 14 and deliver the cold energy out;

[0034] A plurality of wind arm pipes 11 are evenly arranged around the cold source shell 1; the wind arm pipes 11 have a supply air duct 17 and a return air duct 18 separated from each other; the supply air duct 17 is connected to the cold supply chamber 15, and the return air duct 18 is connected to the refrigeration chamber 14;

[0035] The air supply port 12 is provided on the side wall of the air supply duct 17;

[0036] The return air port 13 is provided on the side wall of the return air duct 18;

[0037] The air intake of the centrifugal fan 2 sucks in the cold air flow from the connecting hole 19, and sends it to the air supply duct 17 of each wind arm pipe 11, and finally sends it out from the air supply port 12; the air flow with a higher temperature is sucked in from the return air port 13, and sent into the refrigeration chamber 14 through the return air duct 18; after heat exchange and cooling with the evaporator 3 in the refrigeration chamber 14, it becomes a cold air flow; completing a cycle.

[0038] The wind arm pipe 11 of the utility model is evenly arranged around the periphery of the cold source shell 1, so that the distances between each air supply port 12 and the return air port 13 and the cold source shell 1 are equal; coupled with the uniform air outlet characteristics of the centrifugal fan, the air flow velocity and temperature of each air supply port 12 are balanced, thereby optimizing the temperature control performance in the refrigeration space.

[0039] Preferably, the air intake port of the centrifugal fan 2 of the present invention is directly opposite to the connecting hole 19 to ensure air intake efficiency.

[0040] As an embodiment, the centrifugal fan 2 has a blade group 21 and a motor 22 for driving the blade group 21 to rotate; the blade group 21 is arranged in the cold delivery chamber 15, and the motor 22 is arranged outside the cold source shell 1; a flange can be set at the connection position between the motor 22 and the blade group 21 for sealing to avoid loss of cold.

[0041] This embodiment saves the internal space of the cold source shell 1 and improves the air supply efficiency.

[0042] As an embodiment, the air arm tubes 11 are radially distributed around the cold source shell 1, so that the air supply point can be close to the edge of the refrigeration space, which is conducive to temperature balance in the space.

[0043] Preferably, the cross-sectional shape of the air supply duct 17 is rectangular; an air supply port 12 is respectively provided on two opposite side walls of the air supply duct 17 to increase air supply points and make the air flow evenly distributed in the refrigeration space.

[0044] See also Figure 3 As an embodiment, the length of the return air duct 18 is less than that of the supply air duct 17; the distance between the supply air port 12 and the return air port 13 is increased, the flow path of the cold air in the refrigeration space is extended, sufficient heat exchange is achieved, and the utilization efficiency of the cold air is improved.

[0045] Based on the consideration of structural optimization, a partition plate 16 is also arranged inside the wind arm pipe 11 of the utility model to divide the internal space into a supply air duct 17 and a return air duct 18. Furthermore, the wind arm pipe 11 of the utility model can share the partition plate 16 with the cold source shell 1 to avoid forming a step at the docking position to hinder the flow of airflow.

[0046] Preferably, the utility model has four wind arm tubes 11 arranged in a "cross" shape; further, according to the actual application scenario, the number of wind arm tubes 11 can also be adaptively set to four, five or six.

[0047] See also Figure 4 The utility model also provides a phase change refrigeration system, including a refrigerant storage tank 4; the refrigerant storage tank 4 is connected to the air inlet of the heat exchange tube 31; the refrigerant storage tank 4 contains liquefied gas; the liquefied gas is vaporized in the evaporator 3, absorbs heat, releases cold, and finally flows out through the air outlet of the heat exchange tube 31;

[0048] Based on the consideration of structural optimization, the centrifugal fan 2 and the refrigerant storage tank 4 are respectively arranged on both sides of the evaporator 3.

[0049] Preferably, the refrigerant storage tank 4 of the utility model is a self-pressurizing storage tank, which can pressurize liquefied gas into the heat exchange tube 31. Further, the refrigerant storage tank 4 is connected to the air inlet of the heat exchange tube 31 through a solenoid valve, which is convenient for controlling the air intake. The air outlet of the heat exchange tube 31 is connected to a pressure relief valve, which is convenient for controlling the air pressure in the heat exchange tube 31.

[0050] The liquefied gas in the refrigerant storage tank 4 may be liquid nitrogen, which has a low refrigeration temperature and is pollution-free, and can be directly discharged into the atmosphere.

[0051] According to the requirements of the refrigeration temperature and the usage scenario, the liquefied gas of the utility model can also be liquid carbon dioxide, liquid oxygen, etc.

[0052] As an embodiment, the liquefied gas of the utility model can also be a combustible gas, such as liquid hydrogen or liquid natural gas. This embodiment can be applied to a production unit with a certain scale, the gas outlet of the heat exchange tube 31 is connected to the gas equipment, and the liquid hydrogen or liquid natural gas releases cold energy through the utility model, becomes gaseous, and then burns, making full use of its cold energy and saving energy.

[0053] The refrigeration system of the utility model uses liquefied gas phase change to replace compression refrigeration, reducing the structural components of the refrigeration system. It can achieve ultra-low temperature refrigeration, high refrigeration efficiency, and a wide temperature control range. It reduces the energy consumption of refrigeration and the noise of system operation.

[0054] See also Figure 5 and Figure 6 The utility model also provides a refrigeration device, which has a box body 5; the air duct assembly is installed in the box body 5; and the refrigerant storage tank 4 is arranged outside the box body 5.

[0055] The refrigeration device of the utility model improves the effective utilization space in the box body 5, has low energy consumption and low noise during refrigeration operation.

[0056] Preferably, the refrigeration equipment of the present invention can be a refrigerator, a freezer, a cold storage, etc.

[0057] In summary, the utility model provides a multi-point air supply type air duct assembly, which makes the distance between each air supply port and return air port and the cold source equal by evenly arranging each air arm pipe around the cold source shell; coupled with the uniform air outlet characteristics of the centrifugal fan, the air flow velocity and temperature of each air supply port are balanced, thereby optimizing the temperature control performance in the refrigeration space. The utility model also provides a refrigeration system, which replaces compression refrigeration by liquefied gas phase change refrigeration, and reduces the structural composition of the refrigeration system. It can achieve ultra-low temperature refrigeration, high refrigeration efficiency, and a large temperature control range. The utility model also provides a refrigeration device, which improves the effective utilization of space in the box, and has low energy consumption and low noise during refrigeration operation.

[0058] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A multi-point air supply duct assembly, characterized in that: include: The cold source shell has a partition plate inside; the two sides of the partition plate respectively form a refrigeration chamber and a cold delivery chamber; the partition plate is provided with a connecting hole; An evaporator is arranged in the refrigeration chamber and has a heat exchange tube for generating cold energy; A centrifugal fan is arranged in the cold delivery chamber and is used to absorb the cold energy generated by the refrigeration chamber and deliver the cold energy out; A plurality of wind arm pipes are evenly arranged around the periphery of the cold source shell; the wind arm pipes have a supply air duct and a return air duct separated from each other; the supply air duct is connected to the cold supply chamber, and the return air duct is connected to the refrigeration chamber; An air supply port is provided on a side wall of the air supply duct; The return air outlet is opened on the side wall of the return air duct.

2. The multi-point air supply duct assembly according to claim 1, characterized in that: The centrifugal fan comprises a blade group and a motor for driving the blade group to rotate; the blade group is arranged in the cold delivery chamber, and the motor is arranged outside the cold source shell.

3. The multi-point air supply duct assembly according to claim 1, characterized in that: The air intake port of the centrifugal fan is directly opposite to the communicating hole.

4. The multi-point air supply duct assembly according to claim 1, characterized in that: The wind arm pipes are radially distributed around the cold source shell.

5. The multi-point air supply duct assembly according to claim 1, characterized in that: The cross-sectional shape of the air supply duct is rectangular; an air supply port is respectively provided on two opposite side walls of the air supply duct.

6. The multi-point air supply duct assembly according to claim 1, characterized in that: The length of the return air duct is shorter than that of the supply air duct.

7. A phase change refrigeration system, characterized in that: It comprises a refrigerant storage tank containing liquefied gas; the refrigerant storage tank is connected to the air inlet of the heat exchange tube of the air duct assembly as described in any one of claims 1 to 6.

8. The phase change refrigeration system according to claim 7, characterized in that: The refrigerant storage tank is a self-pressurizing storage tank; the refrigerant storage tank is connected to the air inlet of the heat exchange tube through a solenoid valve, and the air outlet of the heat exchange tube is connected to a pressure relief valve.

9. A refrigeration device, characterized in that: It comprises a box body; the air duct assembly of the phase change refrigeration system according to claim 7 is installed in the box body; the refrigerant storage tank is arranged outside the box body.

10. The refrigeration device according to claim 9, characterized in that: The refrigeration equipment is a refrigerator, a freezer or a cold storage.

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