Local reverse cold circulation cooling system
By using a localized reverse cooling cycle system, a multi-stage refrigeration and heating system, and a high-temperature radiator, the problem of high power and high cost of underground cooling equipment in coal mines has been solved, achieving effective reduction of underground temperature and secondary utilization of heat.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SINOMINE SAILIBITE TECH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-05
AI Technical Summary
Existing coal mine cooling methods require high-power, large-volume refrigeration equipment, which has high operating costs and poor heat dissipation, making it prone to shutdowns.
A localized reverse cooling system is adopted, which includes a low-temperature chamber, a multi-stage refrigeration and heating system, and a high-temperature radiator. By connecting the refrigeration and heating systems in series, a localized reverse cooling cycle is formed, which transports heat step by step to the outside of the mine. The multi-stage system reduces the underground temperature and enables the secondary utilization of heat.
It effectively reduces the temperature in coal mines to below 5°C, while raising the temperature of the heat transfer medium to above 60°C. The heat is then transferred to the outside of the mine, reducing system costs, improving operational reliability, and lowering operating expenses.
Smart Images
Figure CN224200687U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat exchange equipment technology, specifically to a local reverse cold circulation cooling system. Background Technology
[0002] Existing methods for cooling coal mines involve using the entire air volume of the working face for cooling. This process requires a very large amount of cooling capacity, thus necessitating large-capacity, large-volume, and heavy refrigeration equipment, resulting in high power consumption, large investment, and high operating costs.
[0003] In addition, because the airflow itself is hot, the cooling equipment has poor heat dissipation and is prone to high-temperature shutdown. Utility Model Content
[0004] One of the main objectives of this invention is to overcome at least one defect in the prior art and provide a local reverse cooling cycle system.
[0005] To achieve the above technical solution, the present invention adopts the following technical solution:
[0006] According to one aspect of the present invention, a local reverse cooling cycle system is provided, comprising a low-temperature chamber, a multi-stage refrigeration and heating system, and a high-temperature radiator, wherein the low-temperature chamber is located on the upwind side of the multi-stage refrigeration and heating system, and the high-temperature radiator is located on the leeward side of the multi-stage refrigeration and heating system.
[0007] According to one embodiment of the present invention, the multi-stage refrigeration and heating system includes at least one refrigeration system and one heating system, wherein the refrigeration system and the heating system are connected in series.
[0008] According to one embodiment of the present invention, the refrigeration system includes a compressor, a pressure reducing valve, an evaporator, and a condenser, and they are interconnected by pipelines.
[0009] The heating system and the refrigeration system have the same structure; similarly, the heating system includes a compressor, a pressure reducing valve, an evaporator, and a condenser, and they are connected to each other through pipelines.
[0010] According to one embodiment of the present invention, when the refrigeration system and the heating system are connected in series, the condenser of the refrigeration system and the evaporator of the heating system constitute a condenser-evaporator; the condenser-evaporator functions as a condenser in the refrigeration system and as an evaporator in the heating system.
[0011] According to one embodiment of the present invention, the evaporator of the refrigeration system is disposed in a low-temperature chamber, and the condenser of the heating system is disposed in a high-temperature radiator.
[0012] According to one embodiment of the present invention, the high-temperature radiator includes one or more of the following: an air radiator, a liquid radiator, and a steam radiator.
[0013] According to one embodiment of the present invention, the air radiator adopts an air surface cooler. The air surface cooler releases the heat of the heat medium inside the radiator into the outside air through the finned tubes provided on its surface, and the heat is carried away by the airflow.
[0014] According to one embodiment of the present invention, the liquid radiator releases the heat of the heat medium inside the radiator into cold water, and the cold water carries away the heat.
[0015] According to one embodiment of the present invention, the steam radiator includes a steam generator, an inlet pipe disposed at the input end of the steam generator, and a steam outlet disposed at the output end of the steam generator; wherein the steam generator is a shell-and-tube heat exchanger.
[0016] Furthermore, in order to prevent scale buildup in the steam pipes of the steam radiator and improve heat exchange efficiency, a softening device is installed at the water inlet pipe, and turbulent descaling balls are installed inside the steam pipes of the steam generator.
[0017] According to one embodiment of the present invention, the low-temperature chamber includes a bottom plate, a top plate, and a side plate disposed between the bottom plate and the top plate;
[0018] The bottom plate, top plate, and side plates all use evaporator heat exchangers; the top plate is provided with a gas vent to prevent gas accumulation.
[0019] As can be seen from the above technical solution, this utility model possesses at least one of the following advantages and positive effects:
[0020] In this invention, the multi-stage refrigeration and heating system includes at least one refrigeration system and one heating system. By connecting the refrigeration and heating systems in series, heat in the coal mine can be transferred step by step. The heat is transferred to the outside of the mine through a high-temperature radiator, effectively reducing the temperature inside the mine. A local reverse cold circulation mechanism is formed within the refrigeration and heating systems, which can continuously provide low-temperature and low-pressure gas for cooling in the coal mine. Its structure is ingeniously designed, the system has low construction cost, is safe and reliable in operation, and has low subsequent operating costs.
[0021] When the cooling system of this utility model is running, the refrigeration system can reduce the temperature in the low-temperature chamber to below 5°C and raise the temperature of the heat medium to above 60°C; while the heating system can raise the temperature of the heat medium from 60°C to above 100°C; the heat is transferred to the outside of the mine through a step-by-step "transportation", which not only effectively reduces the temperature in the coal mine, but also allows for the secondary utilization of the transferred heat. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the local reverse cooling cycle cooling system described in this utility model.
[0024] The annotations in the attached figures are explained as follows:
[0025] 1-Low-temperature chamber, 2-Condenser / evaporator, 3-High-temperature radiator, 4-Refrigeration system, 41-First compressor,
[0026] 42-First pressure reducing valve, 5-Heating system, 51-Second compressor, 52-Second pressure reducing valve, 6-Water inlet pipe, 7-Softening device, 8-Steam outlet. Detailed Implementation
[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. The terms "inner," "outer," "upper," "lower," etc., indicate the orientation or state relationship based on the orientation or state relationship shown in the drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0029] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein.
[0030] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0031] As attached Figure 1As shown, the local reverse cold circulation cooling system of this utility model includes a low-temperature chamber 1, a condenser-evaporator 2, and a high-temperature radiator 3. The low-temperature chamber 1 and the condenser-evaporator 2 are connected by a refrigeration system 4, and the condenser-evaporator 2 and the high-temperature radiator 3 are connected by a heating system 5. The low-temperature chamber 1 is located on the upwind side of the refrigeration system 4, and the high-temperature radiator 3 is located on the downwind side of the heating system 5.
[0032] In one embodiment of the local reverse cooling cycle system of this utility model, when the system is running, the first compressor 41 of the refrigeration system 4 compresses the heat medium in the low-temperature chamber 1 into a high-temperature, high-pressure liquid, which then enters the condenser-evaporator 2 for heat dissipation and cooling, becoming a low-temperature, high-pressure liquid. After being depressurized by the first pressure reducing valve 42, it becomes a low-temperature, low-pressure gas and enters the low-temperature chamber 1. The low-temperature, low-pressure gas absorbs heat from the low-temperature chamber through the evaporator of the refrigeration system 4, becoming a medium-temperature, low-pressure gas. After being drawn in and compressed by the first compressor 41 of the refrigeration system 4, it is pressurized and circulates. The low-temperature, low-pressure gas absorbs heat in the low-temperature chamber 1, which can reduce the temperature in the low-temperature chamber 1 to below 5°C. The first compressor 41 of the refrigeration system 4 compresses the heat medium into a high-temperature, high-pressure liquid, which then enters the condenser-evaporator 2 for heat dissipation and cooling, avoiding the accumulation of a large amount of high-temperature liquid. The depressurized low-temperature, low-pressure gas is transferred to the low-temperature chamber 1 for circulation and cooling through the first pressure reducing valve 42. At the same time, the heating system 5 further transfers heat.
[0033] The second compressor 51 of the heating system 5 compresses the heat medium into a high-temperature, high-pressure liquid and enters the high-temperature radiator 3. After heat dissipation and cooling, it becomes a low-temperature, high-pressure liquid. After being depressurized by the second pressure reducing valve 52, it becomes a low-temperature, low-pressure gas and enters the condenser evaporator 2. After absorbing the heat transferred from the heat medium of the refrigeration system 4, it becomes a medium-temperature, low-pressure gas and is then drawn into the second compressor 51 of the heating system 5 for compression and cyclic operation.
[0034] When the cooling system of this utility model is running, the refrigeration system 4 can reduce the temperature in the low-temperature chamber 1 to below 5°C and raise the temperature of the heat medium to above 60°C; while the heating system 5 can raise the temperature of the heat medium from 60°C to above 100°C; the heat is transferred to the outside of the mine through a step-by-step "transportation", which not only effectively reduces the temperature in the coal mine, but also allows for the secondary utilization of the transferred heat.
[0035] In another embodiment of the local reverse cooling cycle cooling system of this utility model, when the high-temperature radiator 3 is selected as an air radiator, the high-pressure high-temperature liquid compressed by the second compressor 51 of the heating system 5 enters the finned tube of the high-temperature radiator 3, and the heat is dissipated into the air by the finned tube and carried away by the airflow.
[0036] In another embodiment of the local reverse cooling system of this utility model, when the high-temperature radiator 3 is a steam radiator, the tap water is softened by the softening device 7 and then enters the low-temperature side of the steam generator 31 inside the high-temperature radiator 3 through the water inlet pipe 6. By absorbing the heat from the high-temperature side, the temperature of the steam generator 31 is raised to above 100 degrees Celsius, and steam is generated and discharged from the steam outlet 8.
[0037] It should be understood that this invention is not limited to the detailed structure and arrangement of the components presented herein. This invention can have other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this invention. It should be understood that the invention disclosed and defined herein extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. The embodiments described herein illustrate the best known mode for implementing this invention and will enable those skilled in the art to utilize this invention.
Claims
1. A localized reverse cooling cycle system, characterized in that, It includes a low-temperature chamber, a multi-stage refrigeration and heating system, and a high-temperature radiator. The low-temperature chamber is located on the upwind side of the multi-stage refrigeration and heating system, and the high-temperature radiator is located on the leeward side of the multi-stage refrigeration and heating system.
2. The local reverse cooling cycle cooling system according to claim 1, characterized in that, The multi-stage cooling and heating system includes at least one cooling system and one heating system, which are connected in series.
3. The local reverse cooling cycle cooling system according to claim 2, characterized in that, The refrigeration system includes a compressor, a pressure reducing valve, an evaporator, and a condenser, and they are interconnected by pipelines. The heating system and the refrigeration system have the same structure; similarly, the heating system includes a compressor, a pressure reducing valve, an evaporator, and a condenser, and they are connected to each other through pipelines.
4. The local reverse cooling cycle cooling system according to claim 3, characterized in that, When the refrigeration system and the heating system are connected in series, the condenser of the refrigeration system and the evaporator of the heating system constitute a condenser-evaporator. The condenser-evaporator functions as a condenser in the refrigeration system and as an evaporator in the heating system.
5. The local reverse cooling cycle cooling system according to claim 3, characterized in that, The evaporator of the refrigeration system is located in a low-temperature chamber, and the condenser of the heating system is located in a high-temperature radiator.
6. The local reverse cooling cycle cooling system according to claim 1, characterized in that, The high-temperature radiator includes one or more of the following: air radiator, liquid radiator, and steam radiator.
7. A local reverse cooling cycle system according to claim 6, characterized in that, The air radiator uses an air surface cooler, which releases the heat of the heat medium inside the radiator into the outside air through finned tubes on its surface, and the heat is carried away by the airflow.
8. A local reverse cooling cycle cooling system according to claim 6, characterized in that, The steam radiator includes a steam generator, an inlet pipe at the input end of the steam generator, and a steam outlet at the output end of the steam generator; wherein the steam generator is a shell-and-tube heat exchanger.
9. A local reverse cooling cycle system according to claim 8, characterized in that, To prevent scale buildup in the steam pipes of the steam radiator and improve heat exchange efficiency, a softening device is installed at the water inlet pipe, and turbulent descaling balls are installed inside the steam pipes of the steam generator.
10. A local reverse cooling cycle cooling system according to claim 1, characterized in that, The low-temperature chamber includes a bottom plate, a top plate, and a side plate disposed between the bottom plate and the top plate; The bottom plate, top plate, and side plates all use evaporator heat exchangers; the top plate is provided with a gas vent to prevent gas accumulation.