CN212299530U - Refrigerating system with pressure control device - Google Patents
Refrigerating system with pressure control device Download PDFInfo
- Publication number
- CN212299530U CN212299530U CN202020974320.8U CN202020974320U CN212299530U CN 212299530 U CN212299530 U CN 212299530U CN 202020974320 U CN202020974320 U CN 202020974320U CN 212299530 U CN212299530 U CN 212299530U
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- control device
- overflow valve
- compressor
- pressure control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a take pressure control device's refrigerating system, including compressor, condenser, first overflow valve, reservoir and evaporimeter, refrigerating system includes pressure control device, and pressure control device includes second overflow valve and subcooling heat exchanger, and the entry and the reservoir upper portion of second overflow valve are connected, and the export and the subcooling heat exchanger of second overflow valve are connected, and the other end of subcooling heat exchanger is connected to the entry end of compressor. The beneficial effects are as follows: set up the second overflow valve through the top at the reservoir and be connected to the compressor inlet end and reduce the pressure in the reservoir, can overflow a part of liquid through the overflow valve step-down, if this part of liquid is inhaled by the compressor and can damage the compressor, consequently, set up the liquid gasification that the subcooling heat exchanger produced the overflow step-down between second overflow valve and compressor inlet, when reducing reservoir internal pressure, can also be with the liquid subcooling that supplies with the evaporimeter, refrigerating system's refrigeration efficiency and refrigerating output have been increased.
Description
Technical Field
The utility model relates to a refrigeration field, in particular to take pressure control device's refrigerating system.
Background
Currently, in the field of refrigeration systems, both regulatory agencies and users have two vital indicators, one being safety and the other being environmental protection. The natural working media such as carbon dioxide are selected to solve the environmental protection problem, so that the natural working media are widely recognized and become a new trend for the development of the refrigeration industry. The refrigerating system needs to use a compressor to compress a refrigerating medium into a high-pressure state for condensation and then circulation, the higher the condensation pressure of the system is, the higher the exhaust temperature of a compression device becomes, and even exceeds the rated exhaust pressure and exhaust temperature of the compression device, so that the system is often shut down due to high-pressure protection and is inconvenient to use, and in addition, the energy consumption is increased due to frequent shutdown and startup.
Therefore, the utility model provides a simple structure, maintain convenient, can make the liquid medium cooling subcooling that supplies the evaporimeter, safe in utilization's refrigerating system who takes pressure control device when can reducing system's operating pressure, be the utility model discloses a create the engine.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a simple structure, maintain convenient, can make the liquid medium cooling subcooling, the safe in utilization's of supplying with the evaporimeter take pressure control device's refrigerating system when can lowering system operating pressure.
The utility model provides a take pressure control device's refrigerating system, its technical scheme is:
the utility model provides a take pressure control device's refrigerating system, which comprises a compressor, the condenser, first overflow valve, reservoir and evaporimeter, the export of compressor and the access connection of condenser, the export of condenser and the access connection of first overflow valve, the export of overflow valve and the access connection of reservoir, the export of reservoir and the access connection of evaporimeter, the export of evaporimeter and the access connection of compressor, refrigerating system includes pressure control device, pressure control device includes second overflow valve and subcooling heat exchanger, the entry and the reservoir upper portion of second overflow valve are connected, the export and the subcooling heat exchanger of second overflow valve are connected, the other end of subcooling heat exchanger is connected to the entry end of compressor.
Preferably, the refrigeration system comprises two cycles, wherein the first cycle is a cycle formed by a compressor, a condenser, a first overflow valve, a liquid storage device, a second overflow valve and a supercooling heat exchanger which are sequentially communicated, so that pressure reduction and supercooling are realized; the second circulation is another circulation formed by a compressor, a condenser, a first overflow valve, a liquid storage device and an evaporator which are communicated in sequence, and low-pressure supercooled liquid is provided for the evaporator.
Preferably, an expansion valve is provided between the evaporator and the reservoir.
Preferably, the subcooling heat exchanger is disposed within the accumulator.
Preferably, the subcooling heat exchanger is disposed at the bottom of the reservoir and immersed in the refrigerant liquid.
Preferably, the supercooling heat exchanger is of a capillary tube structure, a coil tube structure or a finned tube structure.
Preferably, the subcooling heat exchanger is disposed outside the accumulator.
Preferably, the supercooling heat exchanger is of a plate heat exchanger structure, a double pipe structure or a shell and tube structure.
Preferably, the first relief valve and the second relief valve are differential pressure valves.
Preferably, the refrigeration system is a carbon dioxide refrigeration system, the cooling medium is carbon dioxide and the compressor is a carbon dioxide compressor.
The utility model discloses an implement including following technological effect:
the utility model discloses a refrigerating system with pressure control device, be connected to the compressor entry end through the top at the reservoir and reduce the pressure in the reservoir through setting up the second overflow valve, it is experimental to show, can overflow out a part of liquid through the overflow valve step-down, if this part of liquid is inhaled by the compressor and can be damaged the compressor, therefore, set up the liquid gasification that the supercooling heat exchanger produced the overflow step-down between second overflow valve and compressor entry, absorb away partial heat, this kind of setting mode, in reducing reservoir internal pressure, need not set up the liquid cooling subcooling that other parts just can supply with the evaporimeter, moreover, the steam generator is simple in structure, and the steam generator is convenient to maintain, thereby the steam generator is safe in utilization, refrigerating system's refrigeration efficiency and refrigeration.
Drawings
Fig. 1 is a refrigerant system with a pressure control device with a subcooling heat exchanger built into the accumulator.
Fig. 2 is a refrigeration system with a pressure control device with a supercooling heat exchanger externally arranged on a liquid storage device.
In the figure: 1. a compressor; 2. a condenser; 3. a first overflow valve; 4. a reservoir; 5. an evaporator; 6. a second overflow valve; 7. a subcooling heat exchanger; 8. an expansion valve.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and the accompanying drawings, wherein the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit the present invention in any way.
As the refrigeration system operates, the pressure of the liquid accumulator 4 will increase, and if the pressure in the liquid accumulator 4 is higher than a critical value, the liquid accumulator 4 is a non-liquid high-density gas, the refrigeration capacity is greatly reduced, and the pressure increase will also reduce the safety of the system; on the other hand, it is also necessary to provide more pressure-resistant parts, which also increases the manufacturing cost. In addition, if liquid refrigerant is present in the compressor 1 rotating at high speed, the compressor 1 may be seriously damaged. Based on the above problems, the technical scheme of the utility model is proposed.
Referring to fig. 1 and 2, a refrigeration system with a pressure control device includes a compressor 1, a condenser 2, a first overflow valve 3, a liquid reservoir 4 and an evaporator 5, an outlet of the compressor 1 is connected to an inlet of the condenser 2, an outlet of the condenser 2 is connected to an inlet of the first overflow valve 3, an outlet of the overflow valve is connected to an inlet of the liquid reservoir 4, an outlet of the liquid reservoir 4 is connected to an inlet of the evaporator 5, an outlet of the evaporator 5 is connected to an inlet of the compressor 1, the refrigeration system includes a pressure control device, the pressure control device includes a second overflow valve 6 and a supercooling heat exchanger 7, an inlet of the second overflow valve 6 is connected to an upper portion of the liquid reservoir 4, an outlet of the second overflow valve 6 is connected to the supercooling heat exchanger 7, and the other end of the supercooling heat exchanger 7 is connected to. The supercooling heat exchanger 7 can exchange heat between the liquid overflowed from the second overflow valve 6 and the liquid supplied to the evaporator, and the overflowed liquid absorbs heat and is evaporated into gas. The refrigeration system comprises two cycles, wherein the first cycle is a cycle formed by a compressor 1, a condenser 2, a first overflow valve 3, a liquid storage device 4, a second overflow valve 6 and a supercooling heat exchanger 7 which are sequentially communicated, so that pressure reduction and supercooling are realized; the second circulation is another circulation formed by the compressor 1, the condenser 2, the first overflow valve 3, the liquid storage device 4 and the evaporator 5 which are communicated in sequence, and provides low-pressure supercooled liquid for the evaporator 5. Each circulation can be independently circulated, when the evaporator 5 goes wrong, the system can be ensured to operate under the condition of no shutdown, and repeated startup and shutdown is avoided.
The utility model discloses a refrigerating system with pressure control device, be connected to the 1 entry end of compressor through the top that sets up second overflow valve 6 at reservoir 4 and reduce the pressure in reservoir 4, experiments show, can overflow a part of liquid through the overflow valve step-down, if this part of liquid is inhaled by compressor 1 and can be damaged compressor 1, therefore, set up the liquid gasification that supercooling heat exchanger 7 produced the overflow step-down between second overflow valve 6 and the 1 entry of compressor, inhale away partial heat, this kind of setting mode, in the time of reducing 4 internal pressure of reservoir, need not set up other parts and just can will supply with the liquid cooling subcooling of evaporimeter 5, moreover, the steam generator is simple in structure, convenient maintenance, high safety in utilization, refrigerating system's refrigeration efficiency and refrigerating output have been increased.
It should also be noted that the utility model discloses set up first overflow valve 3 and second overflow valve 6 in refrigerating system and control refrigerating system's pressure, first overflow valve 3 is used for controlling the pressure in condenser 2, can make the pressure in condenser 2 remain throughout in suitable within range, ensures the high-efficient operation of condenser 2. The second relief valve 6 is used to control the pressure in the accumulator 4, so that the pressure in the accumulator 4 can be always kept in a proper range, a set amount of refrigerant fluid in the accumulator 4 is ensured, and the refrigeration efficiency at the evaporator 5 end is ensured.
Because the refrigerating system is provided with the pressure control device, the throttling pressure difference is reduced, the throttling loss of the system is reduced, gas-liquid separation is carried out, the refrigerant entering the evaporator 5 is saturated liquid, the performance coefficient of the system is improved, and the system performance is improved.
Specifically, an expansion valve 8 is provided between the evaporator 5 and the liquid reservoir 4. The expansion valve 8 can further reduce the pressure of the carbon dioxide refrigerant, so that the carbon dioxide refrigerant after pressure reduction enters the evaporator 5 for gasification and refrigeration. By adjusting the expansion valve 8, the flow of carbon dioxide refrigerant flowing into the evaporator 5 can also be controlled, so that the refrigerant is sufficiently vaporized in the evaporator 5 to avoid liquid medium entering the compressor 1.
Referring to fig. 1, a supercooling heat exchanger 7 is provided in the accumulator 4. Preferably, the supercooling heat exchanger 7 is arranged at the bottom of the liquid reservoir 4 and is soaked in the refrigerant medium liquid; the supercooling heat exchanger 7 has a capillary tube structure, a coil tube structure or a finned tube structure. The supercooling heat exchanger 7 is arranged in the liquid storage device 4 and connected to the air suction inlet end of the compressor 1, when the second overflow valve 6 passes through high-pressure gas, partial liquid is inevitably overflowed, the overflowed liquid can absorb heat of the liquid in the liquid storage device 4 to evaporate into gas, the temperature of the liquid in the liquid storage device 4 is further reduced, and the purpose of supercooling is achieved while pressure is reduced.
Referring to fig. 2, the supercooling heat exchanger 7 is disposed outside the reservoir, and the supercooling heat exchanger 7 has a plate heat exchanger structure, a sleeve type structure, or a shell and tube type structure. As an example, the supercooling heat exchanger 7 is disposed on a pipeline between the liquid reservoir 4 and the evaporator 5, the supercooling heat exchanger 7 further includes a port connected to the lower liquid outlet of the liquid reservoir 4 and a port connected to the evaporator 5, the other two ports are respectively connected to the lower liquid outlet of the liquid reservoir 4 and the evaporator 5, so that the liquid reservoir 4 is communicated with the evaporator 5, and the supercooling heat exchanger 7 is in contact with the liquid flowing to the evaporator 5. The supercooling heat exchanger 7 is arranged outside the liquid storage device 4, overflowed gas is connected to the air suction inlet end of the compressor 1, when high-pressure gas passes through the second overflow valve 6, part of liquid inevitably overflows, the overflowed liquid can absorb heat of the liquid flowing to the evaporator 5 and is evaporated into gas, the temperature of the liquid supplied to the evaporator 5 is reduced, and the purpose of supercooling is achieved while pressure is reduced. Fig. 2 shows four interfaces, and the arrows indicate the flow direction relationship between the interfaces. Optionally, the supercooling heat exchanger 7 is of a plate heat exchanger structure and is externally arranged in the liquid supply pipeline.
Alternatively, the first relief valve 3 and the second relief valve 6 are differential pressure valves. The differential pressure valve also has a certain throttling function, and the throttling function can reduce the pressure of carbon dioxide in a grading manner, so that the safe and efficient operation of the system is ensured.
Preferably, the refrigeration system of the present invention is a carbon dioxide refrigeration system, the cooling medium is carbon dioxide, and the compressor 1 is a carbon dioxide compressor. It needs to be particularly noted that the technical scheme of the utility model is especially suitable for carbon dioxide refrigeration systems, the GWP of carbon dioxide is 1, ODP is 0, and the refrigerant belongs to environment-friendly refrigerants; has good safety and chemical stability: non-toxic, non-flammable, and suitable for various lubricating oils; has good thermal physical properties: the refrigerating capacity per unit volume is large, and the kinematic viscosity is low; has excellent flow and heat transfer characteristics. But because the critical temperature of the carbon dioxide is low (31.1 ℃), the carbon dioxide is easier to be kept in a gaseous state at a lower temperature, the critical pressure is high (7.38MPa), and the pressure in the gaseous state is higher, so that the operation pressure of the system is high, and the throttling loss is large. Based on the characteristic of carbon dioxide, use the technical scheme of the utility model, can guarantee promptly that the condensing pressure in the condenser 2 keeps in a suitable within range, the pressure in the reservoir 4 keeps in a suitable within range for evaporation effect in the evaporimeter 5 is better, guarantees the safe normal operating of system.
It should be finally noted that the above embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit the scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A refrigerating system with a pressure control device comprises a compressor, a condenser, a first overflow valve, a liquid storage device and an evaporator, wherein an outlet of the compressor is connected with an inlet of the condenser, an outlet of the condenser is connected with an inlet of the first overflow valve, an outlet of the overflow valve is connected with an inlet of the liquid storage device, an outlet of the liquid storage device is connected with an inlet of the evaporator, and an outlet of the evaporator is connected with an inlet of the compressor, and the refrigerating system is characterized in that: the refrigerating system comprises a pressure control device, the pressure control device comprises a second overflow valve and a supercooling heat exchanger, an inlet of the second overflow valve is connected with the upper part of the liquid accumulator, an outlet of the second overflow valve is connected with the supercooling heat exchanger, and the other end of the supercooling heat exchanger is connected to an inlet end of the compressor.
2. The refrigeration system with pressure control device of claim 1, wherein: the refrigeration system comprises two cycles, wherein the first cycle is a cycle formed by a compressor, a condenser, a first overflow valve, a liquid storage device, a second overflow valve and a supercooling heat exchanger which are sequentially communicated, so that decompression and supercooling are realized; the second circulation is another circulation formed by a compressor, a condenser, a first overflow valve, a liquid storage device and an evaporator which are communicated in sequence, and provides supercooled liquid for the evaporator.
3. The refrigeration system with pressure control device of claim 1, wherein: an expansion valve is arranged between the evaporator and the liquid storage device.
4. The refrigeration system with pressure control device of claim 1, wherein: the supercooling heat exchanger is arranged in the liquid storage device.
5. The refrigeration system with pressure control device of claim 4, wherein: the supercooling heat exchanger is arranged at the bottom of the liquid storage device and is soaked in the refrigerant medium liquid.
6. The refrigeration system with pressure control device of claim 5, wherein: the supercooling heat exchanger is of a capillary tube structure, a coil tube structure or a finned tube structure.
7. The refrigeration system with pressure control device of claim 1, wherein: the supercooling heat exchanger is arranged outside the liquid storage device.
8. The refrigeration system with pressure control device of claim 7, wherein: the supercooling heat exchanger is of a plate type heat exchanger structure, a sleeve type structure or a shell and tube type structure.
9. The refrigeration system with pressure control device of claim 1, wherein: the first relief valve and the second relief valve are differential pressure valves.
10. A refrigeration system with a pressure control device according to any one of claims 1 to 9, characterized in that: the refrigeration system is a carbon dioxide refrigeration system, the cooling medium is carbon dioxide, and the compressor is a carbon dioxide compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974320.8U CN212299530U (en) | 2020-06-01 | 2020-06-01 | Refrigerating system with pressure control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020974320.8U CN212299530U (en) | 2020-06-01 | 2020-06-01 | Refrigerating system with pressure control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212299530U true CN212299530U (en) | 2021-01-05 |
Family
ID=73939139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020974320.8U Active CN212299530U (en) | 2020-06-01 | 2020-06-01 | Refrigerating system with pressure control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212299530U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279102A (en) * | 2021-12-14 | 2022-04-05 | 南京恒标斯瑞冷冻机械制造有限公司 | Falling film type evaporation refrigeration system and working method |
| CN116033727A (en) * | 2023-03-28 | 2023-04-28 | 常州贺斯特科技股份有限公司 | Phase distribution structure of phase-change cooling system |
-
2020
- 2020-06-01 CN CN202020974320.8U patent/CN212299530U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114279102A (en) * | 2021-12-14 | 2022-04-05 | 南京恒标斯瑞冷冻机械制造有限公司 | Falling film type evaporation refrigeration system and working method |
| CN114279102B (en) * | 2021-12-14 | 2023-12-29 | 南京恒标斯瑞冷冻机械制造有限公司 | Falling film type evaporation cold refrigerating system and working method |
| CN116033727A (en) * | 2023-03-28 | 2023-04-28 | 常州贺斯特科技股份有限公司 | Phase distribution structure of phase-change cooling system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212299530U (en) | Refrigerating system with pressure control device | |
| CN106766316A (en) | A kind of Gas-supplying enthalpy-increasing CO suitable for cold district2Part overlapping heat pump | |
| CN208652782U (en) | A kind of multi-joint computer-room air conditioning system of heat pipe | |
| CN101776358A (en) | Varied concentration mixed working medium auto-cascade refrigerator | |
| CN204202062U (en) | With the water-cooled cooling water air conditioner unit of ice-reserving function | |
| CN201014851Y (en) | Dual-segment dual-purpose condenser of refrigerating machine | |
| CN209910083U (en) | Power heat pipe multi-connected air conditioner all-in-one machine | |
| CN207280002U (en) | Air source heat pump compressor air-discharging protective device | |
| CN202660808U (en) | Novel heat pipe and heat pump combined refrigerating device | |
| WO2022160339A1 (en) | Two-phase flow air conditioning system with free cooling function | |
| CN115031421A (en) | Low-temperature skid-mounted refrigerating unit of hydrogenation machine | |
| CN201983539U (en) | Low-temperature water chilling unit | |
| CN112361677A (en) | Heat exchange assembly, humidifying device and air conditioning system | |
| CN112963979A (en) | Overlapping heat pump system capable of realizing work cycle conversion | |
| CN207831735U (en) | With regenerator with from the CO2 Trans-critical cycle heat pump circulating systems of cooler | |
| CN205505472U (en) | Freon CO2 overlapping sled piece unit formula refrigerating system | |
| CN113932472A (en) | Operation method based on gas engine heat pump and organic Rankine cycle coupling system | |
| CN213931578U (en) | Heat exchange assembly, humidifying device and air conditioning system | |
| CN217785518U (en) | Air source heat pump unit | |
| CN113280529B (en) | Heat pump circulation system of jet compression type deep condensation exhaust steam | |
| CN204494887U (en) | Low form full-liquid type energy tower water source heat pump units | |
| CN2624110Y (en) | Novel safety household hot-water apparatus needing no energy | |
| CN210070274U (en) | Ultra-low temperature air cooler | |
| CN113915800B (en) | High-temperature double-source heat pump device | |
| CN212457493U (en) | Marine energy-saving self-overlapping refrigerating system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |