CN211204587U - A local refrigeration system for refrigerated space - Google Patents

Abstract

The utility model relates to the technical field of food cold chain, and discloses a local refrigerating system of a refrigerating space, which comprises a first refrigerating subsystem and a second refrigerating subsystem; the first refrigeration subsystem comprises a compressor, a condenser, a throttling device and a first heat exchange pipeline which are sequentially connected in an annular mode; the second refrigeration subsystem comprises a heat exchanger and a second heat exchange pipeline which are sequentially connected in an annular manner; the first heat exchange pipeline and the second heat exchange pipeline are spliced to form a heat exchange device; the heat exchanger is arranged on the bottom surface of the refrigerating space; the heat exchanger is set in the ventilating duct of the cold storage space. The utility model provides a local refrigerating system regulates and control the interior airflow temperature in cold-stored space through first refrigeration subsystem to utilize the temperature of second refrigeration subsystem regulation and control cold-stored space bottom surface, adopt the combined action that underground cooling and ground cold wind flow, keep low temperature in order to satisfy the control by temperature change requirement of cold-stored food in the messenger ground take the altitude, and cold-stored space still guarantees the operational environment that the staff is fit for, in order to realize local refrigeration.

Description

A local refrigeration system for refrigerated space

technical field

The utility model relates to the technical field of food cold chain, in particular to a local refrigeration system for a refrigerated space.

Background technique

With the rapid development of society, human beings have higher and higher requirements for food quality. Storing food at low temperature will slow down the growth and reproduction speed of microorganisms, and weaken the activity of enzymes, thereby ensuring the quality of food and prolonging the storage period of food. At present, my country's food cold chain logistics is still in a very backward stage compared with foreign countries, and there is a serious "broken chain" problem in the process of cold chain transportation, resulting in a large amount of food waste.

The wholesale market is an important link in the cold chain transportation. Due to the complex environment, food and personnel are co-located in the same area. On the premise of meeting the temperature control requirements of refrigerated food, the normal work of personnel cannot be affected. higher requirement. However, my country's wholesale markets are poorly equipped, and most of the food exported from the cold storage is directly auctioned or kept at low temperature with crushed ice. The temperature management system is very irregular, and the quality of the auctioned food cannot be guaranteed.

Utility model content

(1) Technical problems to be solved

In view of the above technical defects and application requirements, the present application proposes a local refrigeration system for refrigerated spaces to solve the problem of temperature control of refrigerated foods in wholesale markets, while meeting the low temperature requirements of refrigerated foods, while still ensuring a suitable environment for staff.

(2) Technical solutions

In order to solve the above problems, the present invention provides a local refrigeration system for a refrigerated space, comprising: a first refrigeration subsystem and a second refrigeration subsystem; the first refrigeration subsystem includes a compressor, a condenser, a A throttling device and a first heat exchange pipe; the second refrigeration subsystem includes a heat exchanger and a second heat exchange pipe that are annularly connected in sequence; the first heat exchange pipe and the second heat exchange pipe are spliced to form a heat exchange device; the heat exchanger is arranged on the bottom surface of the refrigerated space; the heat exchange device is arranged at the ventilation duct of the refrigerated space.

Further, the number of the first refrigeration subsystems and the number of the second refrigeration subsystems are both multiple, and each of the first refrigeration subsystems is provided with at least one corresponding second refrigeration subsystem. .

Further, the number of the ventilation ducts is multiple, each of the ventilation ducts is provided with a fan for blowing air toward the refrigerated space, and each of the ventilation ducts is provided with the heat exchange device.

Further, the ventilation duct includes: several air inlets and several air outlets; the air inlet and the air outlet are communicated with each other through the ventilation duct; A fan, and each of the air outlets is provided with the heat exchange device; each of the air inlets is provided with a fan for blowing air toward the refrigerated space.

Further, the second refrigeration subsystem is a heat pipe heat exchange structure, further comprising: a steam pipe and a liquid pipe; the inlet end of the second heat exchange pipe is communicated with the outlet end of the heat exchanger through the steam pipe , the outlet end of the second heat exchange pipe is communicated with the inlet end of the heat exchanger through the liquid pipe.

Further, the number of the heat exchangers is multiple, the inlet end of each heat exchanger is communicated with the outlet end of the second heat exchange pipe through the liquid pipe, and each heat exchanger The outlet ends of both are communicated with the inlet end of the second heat exchange pipe through the steam pipe.

Further, the second refrigeration subsystem may add a working medium pump in the steam pipeline to enhance the circulation efficiency of the system, including: a working medium pump; the working medium pump is arranged in the steam pipeline.

Further, the condenser is a combination of one or more of an air-cooled condenser, a water-cooled condenser or an evaporative condenser; the throttling device is one of a thermal expansion valve and an electronic expansion valve or a combination of the two.

Further, the heat exchanger is one or a combination of a plate heat exchanger, a tubular heat exchanger or a microchannel heat exchanger.

Further, the outer ring of the heat exchange device is provided with a plurality of cooling fins.

(3) Beneficial effects

The local refrigeration system of the refrigeration space provided by the utility model is provided with a first refrigeration subsystem and a second refrigeration subsystem, the air temperature in the refrigeration space is regulated by the first refrigeration subsystem, and the bottom surface of the refrigeration space is regulated by the second refrigeration subsystem The combined effect of underground cooling and the flow of cold air on the ground is used to keep the ground at a low temperature at a certain height to meet the temperature control requirements of refrigerated food, while the upper part of the refrigerated space still ensures a suitable working environment for the staff to achieve local cooling.

Description of drawings

In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative work.

1 is a schematic structural diagram of a local refrigeration system in a refrigerated space provided by Embodiment 1 of the present invention;

2 is a schematic structural diagram of a local refrigeration system in a refrigerated space provided by Embodiment 2 of the present invention;

3 is a schematic structural diagram of a local refrigeration system in a refrigerated space provided by Embodiment 3 of the present invention;

4 is a schematic structural diagram of a local refrigeration system in a refrigerated space provided by Embodiment 4 of the present invention;

5 is a schematic structural diagram of a local refrigeration system in a refrigerated space provided by Embodiment 5 of the present invention;

6 is a schematic diagram of the Tsukiji auction area of the wholesale market provided by the utility model;

Among them, 1. compressor; 2. condenser; 3. throttling device; 4. first heat exchange pipe; 5. cooling fin; 6. second heat exchange pipe; 7. working fluid pump; 8. heat exchange 9. Steam pipeline; 10. Liquid pipeline; 11. Ventilation pipeline.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. The embodiments described above are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

An embodiment of the present invention provides a local refrigeration system for a refrigerated space, as shown in Figures 1 and 6 , which is mainly used for local refrigeration in wholesale markets. closed. The height of the refrigerated space is designed according to the needs, and a layer of thermally conductive floor with good thermal conductivity is laid on the surface of the refrigerated space.

The local refrigeration system of the refrigerated space includes: a first refrigeration subsystem and a second refrigeration subsystem. The first refrigeration subsystem is used for regulating the temperature of the airflow in the refrigerated space. The second refrigeration subsystem is used to regulate the temperature of the bottom surface of the refrigerated space.

The first refrigeration subsystem adopts vapor compression refrigeration, and includes a compressor 1 , a condenser 2 , a throttling device 3 and a first heat exchange pipe 4 which are connected in sequence. The second refrigeration subsystem includes a heat exchanger 8 and a second heat exchange pipe 6 which are annularly connected in sequence. The first heat exchange pipe 4 is spliced with the second heat exchange pipe 6 to form a heat exchange device. The heat exchanger 8 is arranged on the bottom surface of the refrigerated space. The heat exchange device formed by the first heat exchange pipe 4 and the second heat exchange pipe 6 is arranged at the ventilation pipe 11 of the refrigerated space.

Wherein, the first heat exchange pipe 4 and the second heat exchange pipe 6 are both sealed with the refrigerant. Generally, the first heat exchange pipe 4 is sleeved outside the second heat exchange pipe 6, and the two exchange heat in countercurrent.

As shown in FIG. 1 , the second refrigeration subsystem is a heat pipe heat exchange structure, and further includes: a steam pipeline 9 and a liquid pipeline 10 . The inlet end of the second heat exchange pipe 6 communicates with the outlet end of the heat exchanger 8 through the steam pipe 9 , and the outlet end of the second heat exchange pipe 6 communicates with the inlet end of the heat exchanger 8 through the liquid pipe 10 . The refrigerating medium of the heat pipe heat exchange structure absorbs the heat in the refrigerated space and evaporates in the heat exchanger 8, flows into the second heat exchange pipe through the steam pipe 9, releases heat and condenses to the first refrigeration subsystem, and the condensed liquid is under the action of gravity. The bottom is returned to the heat exchanger 8 through the liquid pipeline 10, so as to continue to evaporate and absorb heat.

The number of heat exchangers 8 can be one or more according to requirements, and when more than one, it is connected in parallel with the original heat exchanger 8 . The inlet end of each heat exchanger 8 communicates with the outlet end of the second heat exchange pipe 6 through the liquid pipe 10 , and the outlet end of each heat exchanger 8 communicates with the inlet end of the second heat exchange pipe 6 through the steam pipe 9 Connected. The second heat exchange pipe 6 may be one of a gravity loop heat pipe without a capillary core or a loop heat pipe with a capillary core.

In this embodiment, the condenser 2 is a combination of one or more of an air-cooled condenser, a water-cooled condenser or an evaporative condenser. The throttling device 3 is one or a combination of the thermal expansion valve and the electronic expansion valve. The heat exchanger 8 is one or a combination of a plate heat exchanger, a tubular heat exchanger or a microchannel heat exchanger.

In specific implementation, the compressor 1 is first started, the refrigerant is compressed by the compressor 1 and then condensed in the condenser 2 , and then enters the first heat exchange pipeline 4 after being throttled and depressurized by the throttling device 3 . The refrigerant in the first heat exchange pipe 4 evaporates and absorbs the heat of the second heat exchange pipe 6 and the outside air and then flows back to the compressor 1, thus completing the entire vapor compression refrigeration. The refrigerating medium of the heat exchanger 8 absorbs the heat of the refrigerated space and evaporates, flows into the second heat exchange pipe 6, releases heat and condenses to the refrigerating medium of the first heat exchange pipe 4, and the condensed condensate flows back to the exchange under the action of gravity. Heater 8, in order to continue to evaporate and absorb heat. The airflow direction is unilateral air supply on the left side. After cooling the food, the cold air flows out from the air outlet on the right, and partly from the upper opening.

The first refrigeration subsystem absorbs the heat in the air, and the cold air enters the refrigerated space through the ventilation duct 11 to reduce the temperature in the refrigerated space. The heat exchanger 8 in the second refrigeration subsystem vaporizes and absorbs heat, thereby reducing the surface temperature of the refrigerated space. Through a refrigeration system, the combined effect of the underground heat pipe heat exchanger and the flow of cold air on the ground is realized, so that the ground can be kept at a low temperature at a certain height to meet the temperature control requirements of refrigerated food, while the upper part of the refrigerated space still ensures a suitable working environment for the staff.

The local refrigeration system of the refrigeration space provided by the embodiment of the present invention is provided with a first refrigeration subsystem and a second refrigeration subsystem, the air temperature in the refrigeration space is regulated by the first refrigeration subsystem, and the refrigeration is controlled by the second refrigeration subsystem The temperature of the bottom surface of the space adopts the combined action of underground cooling and the flow of cold air on the ground to keep the ground at a low temperature within a certain height to meet the temperature control requirements of refrigerated food, while the upper part of the refrigerated space still ensures a suitable working environment for the staff to achieve local cooling.

Based on the above embodiment, in a preferred embodiment, the number of the first refrigeration subsystem and the number of the second refrigeration subsystem are designed to be one or more according to actual requirements, and each first refrigeration subsystem is provided with at least one A corresponding second refrigeration subsystem.

Based on the above embodiments, in an embodiment, as shown in FIG. 2 , in this embodiment, the local refrigeration system of the refrigerated space is provided with two first refrigeration subsystems and two second refrigeration subsystems. There is a ventilation duct on the left and right sides of the refrigerated space. The two first refrigeration subsystems are simultaneously used to regulate the airflow temperature in the refrigerated space. The two second refrigeration subsystems are simultaneously used to regulate the temperature of the bottom surface of the refrigerated space, thereby improving the efficiency of local refrigeration.

Based on the above embodiments, in an embodiment, as shown in FIG. 3 , in this embodiment, the local refrigeration system of the refrigerated space is provided with a first refrigeration subsystem and two second refrigeration subsystems. The first refrigeration subsystem is provided with two second refrigeration subsystems corresponding thereto. There is a ventilation duct on the left and right sides of the refrigerated space. In this embodiment, there is only one set of first refrigeration subsystem, and two throttling devices 3 and two heat exchange devices are connected in parallel in the first refrigeration subsystem, and the throttling devices 3 and heat exchange devices on the left and right sides A compressor and a condenser are shared, thereby improving the efficiency of local refrigeration and simplifying the structure of the local refrigeration system to a certain extent.

In this embodiment, there are multiple ventilation ducts 11 , each ventilation duct 11 is provided with a fan for blowing air into the refrigerated space, and each ventilation duct 11 is provided with a heat exchange device. In order to enhance heat exchange, the outer ring of the heat exchange device is provided with a number of cooling fins 5 .

Based on the above embodiment, in a preferred embodiment, as shown in FIG. 4 , the ventilation duct 11 includes several air inlets and several air outlets. The air inlet and the air outlet communicate with each other through the ventilation duct 11 . The air outlets are arranged on both sides of the refrigerated space, and the air inlets are arranged on the top of the refrigerated space. Each air outlet is provided with a fan for blowing air in the ventilation duct, and each air outlet is provided with a heat exchange device. Each air inlet is provided with a fan for blowing air into the refrigerated space. The air is sucked out from the air outlet, cooled by the first refrigeration subsystem, and the cold air is blown into the refrigerated space from the air inlet on the ceiling, and the cold air flows out from the air outlets on the left and right sides after cooling the food.

Based on the above embodiment, in a preferred embodiment, as shown in FIG. 5 and FIG. 6 , in this embodiment, the local refrigeration system of the refrigerated space is provided with two first refrigeration subsystems and two second refrigeration subsystems . A working fluid pump is added to the steam pipeline of the second refrigeration subsystem to enhance the circulation efficiency of the system, and the second refrigeration subsystem includes: a working fluid pump 7 . The working fluid pump 7 can be arranged in the steam pipeline.

In this embodiment, a working fluid pump is added to the steam pipeline of the second refrigeration subsystem, which improves the circulation efficiency of the system. The liquid-phase working medium absorbs the heat in the refrigerated space in the heat exchanger 8 in the thick ground, and is sent to the second heat exchange pipe 6 in the heat exchange device through the steam pipe through the working medium pump 7 to release heat and phase change, and then passes through the liquid The pipes return to the heat exchanger 8 laid in the ground thickness under the action of gravity, so as to continue to absorb heat.

To sum up, the local refrigeration system of the refrigeration space provided by the embodiment of the present invention is provided with a first refrigeration subsystem and a second refrigeration subsystem, and the air temperature in the refrigeration space is regulated by the first refrigeration subsystem, and the second refrigeration The refrigeration subsystem regulates the temperature of the bottom surface of the refrigerated space, and adopts the combined action of underground cooling and the flow of cold air on the ground to keep the ground at a low temperature at a certain height to meet the temperature control requirements of refrigerated food, while the upper part of the refrigerated space still ensures a suitable working environment for the staff. for local cooling.

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, but not to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit of the technical solutions of the embodiments of the present invention and range.

Claims (10)

1. A local refrigeration system for a refrigerated space comprising:

a first refrigeration subsystem and a second refrigeration subsystem;

the first refrigeration subsystem comprises a compressor, a condenser, a throttling device and a first heat exchange pipeline which are sequentially connected in an annular mode; the second refrigeration subsystem comprises a heat exchanger and a second heat exchange pipeline which are sequentially connected in an annular mode; the first heat exchange pipeline and the second heat exchange pipeline are spliced to form a heat exchange device; the heat exchanger is arranged on the bottom surface of the refrigerating space; the heat exchange device is arranged at the ventilating pipeline of the refrigerating space.

2. A local refrigeration system for a refrigerated space as claimed in claim 1 wherein the number of first and second refrigeration subsystems is plural and each first refrigeration subsystem is provided with at least one corresponding second refrigeration subsystem.

3. A local refrigerating system of a refrigerating space as recited in claim 2 wherein the number of said ventilating ducts is plural, each of said ventilating ducts is provided with a fan blowing air into the refrigerating space, and each of said ventilating ducts is provided with said heat exchanging means.

4. A local refrigeration system for a refrigerated space as claimed in claim 2 wherein the ventilation duct comprises: a plurality of air inlets and a plurality of air outlets; the air inlet and the air outlet are communicated with each other through a ventilation pipeline; each air outlet is provided with a fan blowing air towards the inside of the ventilation pipeline, and each air outlet is provided with the heat exchange device; each air inlet is provided with a fan blowing air towards the interior of the refrigerating space.

5. A localized refrigeration system for a refrigerated space as recited in claim 1 wherein the second refrigeration subsystem is a heat pipe heat exchange arrangement and further comprising:

a vapor line and a liquid line; the inlet end of the second heat exchange pipeline is communicated with the outlet end of the heat exchanger through the steam pipeline, and the outlet end of the second heat exchange pipeline is communicated with the inlet end of the heat exchanger through the liquid pipeline.

6. A localized refrigeration system as claimed in claim 5, in which the heat exchangers are plural in number, the inlet end of each heat exchanger being in communication with the outlet end of the second heat exchange duct via the liquid duct, and the outlet end of each heat exchanger being in communication with the inlet end of the second heat exchange duct via the vapor duct.

7. A localized refrigeration system of a refrigerated space as recited in claim 5 further comprising: a working medium pump; the working medium pump is arranged in the steam pipeline.

8. A localized refrigeration system for a refrigerated space as claimed in claim 1 wherein the condenser is a combination of one or more of an air-cooled condenser, a water-cooled condenser or an evaporative condensing type; the throttling device is one or the combination of two of a thermostatic expansion valve and an electronic expansion valve.

9. A local refrigeration system for a refrigerated space as claimed in claim 1 wherein the heat exchanger is one or a combination of plate heat exchangers, tube heat exchangers or microchannel heat exchangers.

10. A sectional cooling system for a refrigerated space as claimed at claim 1 wherein the outer ring of the heat exchange means is provided with a plurality of heat sink fins.

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