Parallel unit exhaust working medium heat recovery system based on high-pressure float switch
By using a plate heat exchanger based on a high-pressure float switch in the parallel refrigeration compressor unit, the exhaust working fluid heat is converted into hot water, which solves the problem that the exhaust working fluid heat cannot be effectively recovered and utilized in the prior art, and achieves efficient recovery and utilization of heat energy.
Patent Information
- Application Number
- CN202421467281.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-26
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-06-26
AI Technical Summary
The existing parallel refrigeration compressor units fail to effectively recover and utilize the exhaust working fluid heat, resulting in increased thermal energy dissipation and energy consumption.
The plate heat exchanger based on high-pressure float switch is adopted to convert the exhaust working fluid heat of the parallel refrigeration compressor unit into hot water, and the heat energy recovery and utilization is realized through the hot water recovery box.
The effective recovery and utilization of the heat of the exhaust gas working fluid of the parallel refrigeration compressor unit is realized, the utilization rate of heat energy is improved, and the dissipation of heat energy and energy consumption are reduced.
Smart Images
Figure CN222688497U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of parallel refrigeration units, in particular to the technical field of exhaust gas heat recovery of parallel refrigeration units, and specifically to an exhaust gas heat recovery system of parallel units based on a high-pressure float switch. Background Art
[0002] The parallel refrigeration compressor unit is a refrigeration unit composed of two or more compressors installed in parallel on a rack to jointly provide cooling for the cold storage. It consists of a rack, several compressors, exhaust manifolds, liquid supply manifolds, return air manifolds, oil separators, liquid storage tanks, filters, various stop valves, various control valves and control systems. It can adjust energy according to the final cooling capacity required by the cold storage. It has the characteristics of centralized control, remote control and reliable operation, and is widely used in cold storage or large cold storage.
[0003] At present, the superheated high-pressure circulating working fluid discharged from the parallel refrigeration compressor unit passes through the oil separator, and the lubricating oil is separated into the oil separator, while the refrigerant gas in the superheated high-pressure state directly enters the condenser. As the main heat exchange equipment in the refrigeration system, the condenser can exchange heat between the superheated high-pressure refrigerant gas entering it and the spray water and air outside the evaporative condenser discharge pipe, that is, the gaseous refrigerant enters the discharge pipe from the upper port of the evaporative condenser and gradually condenses into liquid refrigerant from top to bottom, and part of the spray water absorbs the heat of the superheated high-pressure refrigerant and becomes gaseous, and a large amount of heat energy of the spray water is taken away by the matching induced draft fan. However, the heat of the superheated high-pressure refrigerant discharged by the parallel refrigeration compressor directly enters the outside air through the evaporative condenser, and the exhaust working fluid heat of the parallel refrigeration compressor unit is not fully recovered and utilized, resulting in a large amount of heat energy dissipation and energy consumption.
[0004] In view of this, in order to improve the recovery rate of the exhaust working fluid heat of the parallel refrigeration compressor unit and convert the exhaust working fluid heat into a reusable energy form, a system that can recover and reuse the heat energy is urgently needed. Summary of the invention
[0005] The utility model aims at the above-mentioned technical phenomenon and solves the problem of recycling the exhaust working fluid heat of parallel refrigeration compressor units. Its purpose is to provide an exhaust working fluid heat recovery system for parallel units based on a high-pressure float switch. A heat recovery system of a plate heat exchanger based on a high-pressure float switch is adopted to convert the exhaust working fluid heat of the parallel refrigeration compressor units into hot water, so as to achieve the purpose of recycling and reusing the exhaust working fluid heat.
[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows: a parallel unit exhaust medium heat recovery system based on a high-pressure float switch, comprising a refrigeration compressor, an evaporative condenser, a vertical liquid storage device, a hot water recovery tank and a plate heat exchanger, wherein a plurality of refrigeration compressors are installed on a rack in parallel, a return air header is connected to the air inlet of a plurality of refrigeration compressors through a plurality of return air pipes, and the exhaust ports of the plurality of refrigeration compressors are connected to the exhaust header through a plurality of exhaust pipes, and the end of the exhaust header is connected to the condenser through the condenser. The branch pipe is connected to the upper inlet of the evaporative condenser, the lower outlet of the evaporative condenser is connected to the top inlet of the vertical liquid reservoir through the condenser liquid outlet pipe, the lower outlet of the vertical liquid reservoir is connected to the liquid supply pipeline, the upper left inlet of the plate heat exchanger is connected to the exhaust manifold through the plate high temperature inlet pipe, the lower left outlet of the plate heat exchanger is connected to the condenser liquid outlet pipe through the plate liquid outlet pipe, the upper right outlet of the plate heat exchanger is connected to the hot water recovery tank through the plate hot water outlet pipe, and the lower left inlet of the plate heat exchanger is connected to the plate cold water inlet pipe.
[0007] Furthermore, a high-pressure float switch is installed on the plate heat exchanger liquid outlet pipe near the outlet on the lower left side of the plate heat exchanger, a stop valve is installed at the outlet of the high-pressure float switch, and stop valves are respectively installed on the plate heat exchanger high-temperature inlet pipe, the plate heat exchanger cold water inlet pipe and the plate heat exchanger hot water outlet pipe.
[0008] Furthermore, a water supply pump is installed at the open end of the plate heat exchanger cold water inlet pipe, and the inlet of the water supply pump is connected to the water reservoir through a pipeline.
[0009] Compared with the prior art, the utility model proposes a parallel unit exhaust fluid heat recovery system based on a high-pressure float switch. By adding a plate heat exchanger based on a high-pressure float switch, the exhaust fluid heat of the refrigeration compressor can be converted into hot water, thereby realizing the recovery and utilization of the exhaust fluid heat. The system has a simple structure, is easy to operate and easy to control. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is the overall system principle diagram of the utility model.
[0011] The markings in the figure are: 1: refrigeration compressor; 11: return air header; 12: exhaust header; 2: evaporative condenser; 21: condenser inlet branch pipe; 22: condenser liquid outlet pipe; 3: vertical liquid storage tank; 31: liquid supply pipeline; 4: hot water recovery tank; 5: plate heat exchanger; 51: plate heat exchanger high temperature inlet pipe; 52: plate heat exchanger liquid outlet pipe; 53: plate heat exchanger cold water inlet pipe; 54: plate heat exchanger hot water outlet pipe; 55: high-pressure float switch. DETAILED DESCRIPTION
[0012] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. They are for the purpose of making the technical problems, technical solutions and implementation effects to be solved by the present invention clearer.
[0013] Reference Figure 1 The exhaust working medium heat recovery system of the parallel unit based on the high-pressure float switch comprises a refrigeration compressor 1, an evaporative condenser 2, a vertical liquid storage tank 3, a hot water recovery tank 4 and a plate heat exchanger 5, wherein a plurality of refrigeration compressors 1 are installed on the rack in parallel, a return air header 11 is connected to the air inlet of the plurality of refrigeration compressors 1 through a plurality of return air pipes, and the exhaust ports of the plurality of refrigeration compressors 1 are connected to the exhaust header 12 through a plurality of exhaust pipes, and the end of the exhaust header 12 is connected to the upper end of the evaporative condenser 2 through the condenser inlet branch pipe 21. At the inlet, the lower outlet of the evaporative condenser 2 is connected to the top inlet of the vertical liquid reservoir 3 through the condenser liquid outlet pipe 22, the lower outlet of the vertical liquid reservoir 3 is connected to the liquid supply pipe 31, the upper left inlet of the plate heat exchanger 5 is connected to the exhaust manifold 12 through the plate exchange high temperature inlet pipe 51, the lower left outlet of the plate heat exchanger 5 is connected to the condenser liquid outlet pipe 22 through the plate exchange liquid outlet pipe 52, the upper right outlet of the plate heat exchanger 5 is connected to the hot water recovery tank 4 through the plate exchange hot water outlet pipe 54, and the lower left inlet of the plate heat exchanger 5 is connected to the plate exchange cold water inlet pipe 53.
[0014] As a preferred embodiment, a high-pressure float switch 55 is installed on the plate heat exchanger liquid outlet pipe 52 near the outlet on the lower left side of the plate heat exchanger 5, and a stop valve is installed at the outlet of the high-pressure float switch 55. Stop valves are respectively installed on the plate heat exchanger high-temperature inlet pipe 51, the plate heat exchanger cold water inlet pipe 53 and the plate heat exchanger hot water outlet pipe 54. The stop valves can be used to timely control the recovery and utilization of the exhaust working fluid heat, and at the same time, it is convenient to maintain the plate heat exchanger 5 and related components.
[0015] As a preferred embodiment, a water supply pump is installed at the open end of the plate heat exchanger cold water inlet pipe 53, and the inlet of the water supply pump is connected to the water reservoir through a pipeline. The cold water in the water reservoir is provided to the plate heat exchanger 5 by the water supply pump, and heat exchange is performed with the high-temperature exhaust medium provided by the plate heat exchanger high-temperature inlet pipe 51 in the plate heat exchanger 5. After forming hot water of a certain temperature, it flows back to the hot water recovery tank 4 along the plate heat exchanger hot water outlet pipe 54.
[0016] The described parallel unit exhaust working medium heat recovery system based on high-pressure float switch, when the refrigeration compressor 1 is running, if it is not necessary to recover the exhaust working medium heat, the stop valves of the plate exchange high-temperature inlet pipe 51, the plate exchange liquid outlet pipe 52, the plate exchange cold water inlet pipe 53 and the plate exchange hot water outlet pipe 54 are all in a closed state; if it is necessary to recover the exhaust working medium heat or hot water is needed, the stop valves of the plate exchange high-temperature inlet pipe 51, the plate exchange liquid outlet pipe 52, the plate exchange cold water inlet pipe 53 and the plate exchange hot water outlet pipe 54 are opened at the same time, and the water supply pump installed at the open end of the plate exchange cold water inlet pipe 53 is started at the same time, and the high-temperature gaseous working medium discharged from the refrigeration compressor 1 enters along the plate exchange high-temperature inlet pipe 51 In the plate heat exchanger 5, the water supply pump supplies cold water from the water tank to the plate heat exchanger 5. At this time, the high-temperature gaseous working medium and the cold water exchange heat and cold in the plate heat exchanger 5. The high-temperature gaseous working medium is gradually cooled into a liquid working medium, and the cold water is heated to form hot water, which flows back to the hot water recovery tank 4 along the plate heat exchanger hot water outlet pipe 54. When the liquid working medium in the plate heat exchanger 5 accumulates to a certain height, the high-pressure float switch 55 automatically opens, and the liquid working medium in the plate heat exchanger 5 enters the vertical liquid storage tank 3 along the plate heat exchanger liquid outlet pipe 52, thereby realizing the repeated use of the circulating working medium and recovering and utilizing the exhaust working medium heat of the refrigeration compressor 1.
[0017] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A parallel unit exhaust medium heat recovery system based on a high-pressure float switch, comprising a refrigeration compressor (1), an evaporative condenser (2), a vertical liquid storage tank (3), a hot water recovery tank (4) and a plate heat exchanger (5), characterized in that: A plurality of refrigeration compressors (1) are installed on a rack in parallel, a return air header (11) is connected to the air intakes of the plurality of refrigeration compressors (1) through a plurality of return air pipes, exhaust ports of the plurality of refrigeration compressors (1) are connected to an exhaust header (12) through a plurality of exhaust pipes, the end of the exhaust header (12) is connected to the upper inlet of an evaporative condenser (2) through a condenser inlet branch pipe (21), and the lower outlet of the evaporative condenser (2) is connected to the top of a vertical liquid storage tank (3) through a condenser liquid outlet pipe (22). The inlet of the plate heat exchanger (5) is connected to the inlet of the condenser (22), the lower outlet of the vertical liquid storage tank (3) is connected to the liquid supply pipe (31), the upper left inlet of the plate heat exchanger (5) is connected to the exhaust manifold (12) through the plate exchange high temperature inlet pipe (51), the lower left outlet of the plate heat exchanger (5) is connected to the condenser liquid outlet pipe (22) through the plate exchange liquid outlet pipe (52), the upper right outlet of the plate heat exchanger (5) is connected to the hot water recovery tank (4) through the plate exchange hot water outlet pipe (54), and the lower left inlet of the plate heat exchanger (5) is connected to the plate exchange cold water inlet pipe (53).
2. According to claim 1, a parallel unit exhaust working medium heat recovery system based on high-pressure float switch is characterized in that: A high-pressure float switch (55) is installed on the plate heat exchanger liquid outlet pipe (52) near the outlet on the lower left side of the plate heat exchanger (5), a stop valve is installed at the outlet of the high-pressure float switch (55), and stop valves are installed on the plate heat exchanger high-temperature inlet pipe (51), the plate heat exchanger cold water inlet pipe (53) and the plate heat exchanger hot water outlet pipe (54), respectively.
3. According to claim 1, a parallel unit exhaust working medium heat recovery system based on high-pressure float switch is characterized in that: A water supply pump is installed at the open end of the plate exchanger cold water inlet pipe (53), and the inlet of the water supply pump is connected to the water reservoir through a pipeline.