Refrigerating system based on four-way reversing valve
By using a refrigeration system based on a four-way reversing valve, the refrigerant flow direction is automatically adjusted to achieve evaporator heating and defrosting, which solves the problems of decreased heat transfer efficiency and increased energy consumption caused by evaporator frosting, and improves the stability and economy of the system.
Patent Information
- Application Number
- CN202520126485.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Traditional refrigeration systems are prone to frost buildup on evaporators in high humidity environments, which leads to decreased heat transfer efficiency and shortened compressor lifespan. Furthermore, electric defrosting systems increase equipment complexity and energy consumption.
A refrigeration system based on a four-way reversing valve is adopted. The refrigerant flow is automatically controlled by the four-way reversing valve to realize the automatic adjustment of refrigeration and defrosting modes. The evaporator is heated and defrosted by high-temperature and high-pressure refrigerant, which simplifies the defrosting process.
It enables stable operation of the refrigeration system in high humidity environments, reduces energy consumption and operating costs, and improves the installation flexibility and refrigeration efficiency of the unit.
Smart Images
Figure CN223855893U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to refrigeration equipment technical field. Especially, it relates to a refrigeration system based on four-way reversing valve. BACKGROUND
[0002] The evaporator is easy to frost on the fin in the refrigeration process due to high humidity environment, and the frost layer thickens with the increase of running time, the gap between the fins becomes smaller, which leads to the decrease of heat transfer efficiency, the internal wind resistance of the evaporator becomes larger, and even the service life of the refrigeration compressor is affected in serious cases. Therefore, in order to ensure the refrigeration efficiency and the service life of the compressor, the evaporator needs to be defrosted regularly. The traditional electric heating defrosting system needs additional electric heating equipment and control system, which increases the complexity and cost of the equipment. At the same time, due to high energy consumption, the operation cost will also increase accordingly. SUMMARY
[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a refrigeration system based on four-way reversing valve to solve the problems raised in the above background.
[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: a refrigeration system based on four-way reversing valve, comprising: scroll compressor, water-cooled condenser, evaporator, four-way reversing valve, the scroll compressor is connected with the water-cooled condenser and the evaporator through the four-way reversing valve, and the water-cooled condenser is connected with the outlet of the scroll compressor, the refrigeration system further comprises: economizer, liquid accumulator, oil separator, gas-liquid separator, third throttling device, the economizer comprises economizer first port, economizer second port, economizer third port and economizer fourth port, the economizer and the liquid accumulator are arranged in the refrigerant circuit between the water-cooled condenser and the evaporator, and the liquid accumulator is arranged at the liquid outlet of the water-cooled condenser, and the economizer is arranged before the liquid supply port of the evaporator, and the economizer is provided with the first throttling device on the connecting pipeline of the water-cooled condenser.
[0005] The oil separator and the four-way reversing valve are arranged in the refrigerant circuit between the scroll compressor and the water-cooled condenser, and the oil separator is arranged at the outlet of the scroll compressor.
[0006] The gas-liquid separator and the four-way reversing valve are connected between the evaporator and the scroll compressor, and the gas-liquid separator is arranged before the inlet of the scroll compressor.
[0007] Preferably, the four-way reversing valve is provided with four-way reversing valve first port, four-way reversing valve second port, four-way reversing valve third port and four-way reversing valve fourth port.
[0008] Preferably, the throttling side of the economizer is provided with an economizer first port and an economizer second port, the supercooling side is provided with an economizer third port and an economizer fourth port, the throttling side economizer first port is provided with a first throttling device and a first filter, and the supercooling side economizer fourth port is provided with a second throttling device.
[0009] Preferably, the water-cooled condenser is provided with a water-cooled condenser first port, a water-cooled condenser second port, a water-cooled condenser third port and a water-cooled condenser fourth port.
[0010] Preferably, the water-cooled condenser and the economizer are plate heat exchangers.
[0011] Preferably, the liquid level monitoring device is arranged in the liquid storage tank, a first one-way valve is arranged in the liquid outlet pipeline between the liquid storage tank and the water-cooled condenser, a second one-way valve is arranged in the defrosting pipeline between the liquid storage tank and the evaporator, and a second filter is arranged at the outlet of the liquid storage tank.
[0012] Preferably, the third throttling device is arranged in the defrosting pipeline between the economizer fourth port and the water-cooled condenser third port, and is opened only during defrosting.
[0013] Technical effects and advantages of the present application:
[0014] Compared with the prior art, the indoor evaporating and condensing integrated unit with a four-way reversing valve realizes automatic adjustment of the refrigeration and defrosting modes, simplifies the defrosting process, the integrated design enhances the flexibility of the unit installation, reduces the energy consumption and operation cost, ensures stable operation of the unit in various environments, and becomes an optimal solution in the field of refrigeration equipment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 It is a schematic diagram of the principle of the present application.
[0016] Fig. 2 It is a schematic diagram of the four-way reversing valve of the present application.
[0017] Fig. 3 It is a schematic diagram of the economizer of the present application.
[0018] Fig. 4 It is a schematic diagram of the water-cooled condenser of the present application.
[0019] The attached diagram is labeled as follows: 1. Scroll compressor; 2. Water-cooled condenser; 3. Economizer; 4. Evaporator; 5. Four-way reversing valve; 6. Gas-liquid separator; 7. Oil separator; 8. Liquid receiver; 9. First throttling device; 10. Second throttling device; 11. Third throttling device; 12. First check valve; 13. Second check valve; 14. First filter; 15. Second filter; 101. First port of four-way reversing valve; 102. Second port of four-way reversing valve; 103. Third port of four-way reversing valve; 104. Fourth port of four-way reversing valve; 201. First port of economizer; 202. Second port of economizer; 203. Third port of economizer; 204. Fourth port of economizer; 301. First port of water-cooled condenser; 302. Second port of water-cooled condenser; 303. Third port of water-cooled condenser; 304. Fourth port of water-cooled condenser. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] like Figs. 1 to 4 The refrigeration system shown includes a four-way reversing valve, comprising: a scroll compressor 1, a water-cooled condenser 2, an economizer 3, an evaporator 4, a four-way reversing valve 5, a gas-liquid separator 6, an oil separator 7, a liquid receiver 8, a first throttling device 9, a second throttling device 10, a third throttling device 11, a first check valve 12, a second check valve 13, a first filter 14, and a second filter 15. The water-cooled condenser 2 is connected to the outlet of the scroll compressor 1, and the oil separator 7 is connected to the four-way reversing valve 5. In the refrigerant circuit between the scroll compressor 1 and the water-cooled condenser 2, the oil separator 7 is located at the outlet of the scroll compressor 1; the economizer 3 and the liquid receiver 8 are located in the refrigerant circuit between the water-cooled condenser 2 and the evaporator 4, with the liquid receiver 8 located at the liquid outlet of the water-cooled condenser 2 and the economizer 3 located before the liquid supply port of the evaporator 4; the gas-liquid separator 6 and the four-way reversing valve 5 are connected between the evaporator 4 and the scroll compressor 1, with the gas-liquid separator 6 located before the inlet of the scroll compressor 1.
[0022] The four-way reversing valve 5 automatically starts the defrosting program by controlling the flow direction of the refrigerant, the four-way reversing valve 5 is provided with a four-way reversing valve first port 101, a four-way reversing valve second port 102, a four-way reversing valve third port 103 and a four-way reversing valve fourth port 104, the throttling side of the economizer 3 is provided with an economizer first port 201 and an economizer second port 202, the supercooling side is provided with an economizer third port 203 and an economizer fourth port 204, the first port of the throttling side is provided with a first throttling device 9 and a first filter 14, the second throttling device 10 is arranged near the economizer fourth port 204 of the supercooling side, the water-cooled condenser 2 is provided with a water-cooled condenser first port 301, a water-cooled condenser second port 302, a water-cooled condenser third port 303 and a water-cooled condenser fourth port 304, the water-cooled condenser 2 and the economizer 3 are plate heat exchangers, the liquid level monitoring device is arranged on the liquid accumulator 8, the first one-way valve 12 is arranged in the liquid down pipe between the liquid accumulator 8 and the water-cooled condenser 2, the second one-way valve 13 is arranged in the defrosting pipe between the liquid accumulator and the evaporator, the second filter 15 is arranged at the outlet of the liquid accumulator 8, the third throttling device 11 is arranged in the defrosting pipe between the economizer fourth port 204 and the water-cooled condenser third port 303 and is opened only during defrosting, during the operation of the unit, when the frost on the surface of the evaporator 4 reaches a certain degree, the four-way reversing valve 5 automatically enters the defrosting working state, the high-temperature and high-pressure refrigerant discharged from the scroll compressor 1 is punched into the evaporator 4 through the four-way reversing valve 5 to heat and defrost, after the defrosting is completed, the four-way reversing valve 5 is switched back to the normal working state again to restore the refrigeration cycle.
[0023] The working process of the utility model is as follows:
[0024] In the refrigeration mode, the scroll compressor 1 first sucks in the low-temperature and low-pressure gas from the evaporator 4, and then compresses it into high-temperature and high-pressure gas. After the lubricating oil is separated by the oil separator 7, the high-temperature and high-pressure gas enters from the first port 101 of the four-way reversing valve and is discharged from the fourth port 104 of the four-way reversing valve. Then, the high-temperature and high-pressure gas enters the water-cooled condenser 2 from the fourth port 304 of the water-cooled condenser, and exchanges heat with the cooling water entering from the first port 301 of the water-cooled condenser. In this process, the refrigerant is cooled and condensed into liquid, and then flows out from the third port 303 of the water-cooled condenser. After passing through the first check valve 12, the refrigerant liquid flows into the accumulator 8. The cooling water is heated after heat exchange, and then flows out from the second port 302 of the water-cooled condenser. The refrigerant liquid flowing out from the accumulator 8 is filtered by the second filter 15 and then divided into two paths. One path enters the first filter 14 for re-filtering, and then enters the economizer 3 from the first port 201 of the economizer after being expanded and reduced in pressure by the first throttling device 9. The other path of the refrigerant is supercooled. After the evaporation is completed, the part of the refrigerant returns to the scroll compressor 1 from the second port 202 of the economizer. The other path of the refrigerant flows into the evaporator 4 from the third port 203 of the economizer after being supercooled, and then flows out from the fourth port 104 of the four-way reversing valve. After being reduced in pressure and expanded by the second throttling device 10, the refrigerant enters the evaporator 4 to complete the evaporation and refrigeration process. The low-temperature and low-pressure refrigerant vapor produced by the evaporator 4 enters from the second port 102 of the four-way reversing valve, is discharged from the third port 103 of the four-way reversing valve, enters the gas-liquid separator 6, and then returns to the scroll compressor 1 to start a new refrigeration cycle.
[0025] In defrosting condition, the high temperature and high pressure gas discharged from the scroll compressor 1 is separated from the lubricating oil by the oil separator 7, then enters the four-way reversing valve first port 101, and is discharged from the four-way reversing valve second port 102 to the evaporator 4 for defrosting; at this time, the evaporator 4 is changed into the condenser in refrigeration condition. The high temperature and high pressure refrigerant gas exchanges heat with the frost layer of the evaporator 4, and is cooled and condensed into liquid refrigerant. The liquid refrigerant flows into the liquid accumulator 8 through the second one-way valve 13. The refrigerant liquid flowing out of the liquid accumulator 8 is filtered by the second filter 15, and is divided into two paths. One path enters the first filter 14 for re-filtering, and then enters the economizer 3 through the first throttling device 9 to evaporate and absorb heat, so that the other path of refrigerant is supercooled. After the evaporation is completed, the part of refrigerant returns to the scroll compressor 1 from the economizer second port 202, and the other path of refrigerant flows into the economizer 3 from the economizer third port 203, and is supercooled. After the supercooling is completed, the refrigerant flows out from the four-way reversing valve fourth port 104, and then is expanded by the third throttling device 11, and then enters the water-cooled condenser 2 from the water-cooled condenser third port 303 to evaporate; at this time, the water-cooled condenser 2 is changed into the evaporator in refrigeration condition. The low temperature and low pressure refrigerant gas evaporated is discharged from the water-cooled condenser fourth port 304 to the four-way reversing valve fourth port 104, enters the four-way reversing valve 5, and is discharged from the four-way reversing valve third port 103 to the gas-liquid separator 6. The gas-liquid separator 6 ensures that only the gaseous refrigerant returns to the scroll compressor 1, so that the defrosting cycle is completed.
[0026] The utility model discloses a four-way reversing valve is introduced and adopts the integrated design innovation, simplifies the process of defrosting, enhances the flexibility of unit installation, reduces energy consumption and operating cost, and this is the working process of the system.
[0027] The above is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.
Claims
1. A four-way reversing valve based refrigeration system comprising: The vortex compressor, the water-cooled condenser, the evaporator, and the four-way reversing valve, the vortex compressor is connected with the water-cooled condenser and the evaporator through the four-way reversing valve, and the water-cooled condenser is connected with the outlet of the vortex compressor, characterized in that the refrigeration system further comprises an economizer, a liquid accumulator, an oil separator, a gas-liquid separator, and a third throttling device, the economizer comprises an economizer first port, an economizer second port, an economizer third port, and an economizer fourth port, the economizer and the liquid accumulator are arranged in the refrigerant circuit between the water-cooled condenser and the evaporator, the liquid accumulator is arranged at the liquid outlet of the water-cooled condenser, and the economizer is arranged before the liquid supply port of the evaporator, and the economizer is provided with a first throttling device on the connecting pipeline of the water-cooled condenser; the oil separator and the four-way reversing valve are arranged in the refrigerant circuit between the vortex compressor and the water-cooled condenser, and the oil separator is arranged at the outlet of the vortex compressor; the gas-liquid separator and the four-way reversing valve are connected between the evaporator and the vortex compressor, and the gas-liquid separator is arranged before the inlet of the vortex compressor.
2. A four-way valve based refrigeration system as claimed in claim 1, wherein, the four-way reversing valve is provided with a four-way reversing valve first port, a four-way reversing valve second port, a four-way reversing valve third port, and a four-way reversing valve fourth port.
3. A four-way reversing valve based refrigeration system as claimed in claim 1 wherein, the throttling side of the economizer is provided with an economizer first port and an economizer second port, the supercooling side is provided with an economizer third port and an economizer fourth port, the economizer first port of the throttling side is provided with a first throttling device and a first filter, and the economizer fourth port of the supercooling side is provided with a second throttling device.
4. A four-way reversing valve based refrigeration system as claimed in claim 1, wherein, the water-cooled condenser is provided with a water-cooled condenser first port, a water-cooled condenser second port, a water-cooled condenser third port, and a water-cooled condenser fourth port.
5. A four-way reversing valve based refrigeration system as claimed in claim 1 wherein, the water-cooled condenser and the economizer are plate heat exchangers.
6. A four-way reversing valve based refrigeration system as claimed in claim 1 wherein, the liquid accumulator is provided with a liquid level monitoring device, a first one-way valve is arranged in the liquid outlet pipeline between the liquid accumulator and the water-cooled condenser, a second one-way valve is arranged in the defrosting pipeline between the liquid accumulator and the evaporator, and a second filter is arranged at the outlet of the liquid accumulator.
7. A four-way reversing valve based refrigeration system as claimed in claim 1 wherein, the third throttling device is arranged in the defrosting pipeline between the economizer fourth port and the water-cooled condenser third port, and is opened only during defrosting.