WO2024002177A1 - Refrigeration system having accurate temperature control - Google Patents

Refrigeration system having accurate temperature control Download PDF

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Publication number
WO2024002177A1
WO2024002177A1 PCT/CN2023/103279 CN2023103279W WO2024002177A1 WO 2024002177 A1 WO2024002177 A1 WO 2024002177A1 CN 2023103279 W CN2023103279 W CN 2023103279W WO 2024002177 A1 WO2024002177 A1 WO 2024002177A1
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WO
WIPO (PCT)
Prior art keywords
evaporator
refrigerant
channel
refrigeration system
hot gas
Prior art date
Application number
PCT/CN2023/103279
Other languages
French (fr)
Chinese (zh)
Inventor
王宜锋
韦世鹏
梁志滔
Original Assignee
莱尔德热系统(深圳)有限公司
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Publication of WO2024002177A1 publication Critical patent/WO2024002177A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the utility model relates to the field of refrigeration technology, in particular to a refrigeration system with accurate temperature control.
  • the system includes a refrigerant loop and a heat source loop; the refrigerant loop includes a compressor, condenser, electronic expansion valve, evaporator, hot gas bypass valve, dry filter, sight glass, temperature sensor, and pressure sensor.
  • the heat source circuit includes: water tank, water pump, user end heat source and temperature sensor; the evaporator is used for heat exchange of refrigerant and secondary refrigerant in the heat source circuit; the hot gas bypass is connected to the evaporator from the compressor exhaust port At the inlet, the hot gas from the exhaust port of the compressor is introduced into the evaporator and mixed with the low-temperature refrigerant from the condenser after throttling by the electronic expansion valve. Part of the cooling capacity is offset by hot and cold mixing to achieve temperature control.
  • the refrigeration system controls the opening of the electronic expansion valve through the superheat of the refrigerant at the evaporator outlet.
  • This utility model is to provide a refrigeration system with accurate temperature control, which has stable operation and more accurate temperature control.
  • a refrigeration system with accurate temperature control including: a compressor, a condenser, an electronic expansion valve, an evaporator, a drying filter, a sight glass, a temperature sensor, a pressure sensor and a pressure switch, characterized in that the evaporator
  • the number of channels in is two or three, two of which are hot gas bypass channels and refrigerant channels.
  • the compressor, the pressure switch, the condenser, the dry filter, the The sight glass, the evaporator, the temperature sensor and the pressure sensor are sequentially connected in series to form a closed refrigerant circuit, and the refrigerant circuit passes through the refrigerant channel of the evaporator, and the refrigerant circuit of the compressor
  • the exhaust port is connected to an end of the electronic expansion valve close to the sight glass through a hot gas bypass, the hot gas bypass passes through the hot gas bypass channel, and the hot gas bypass is provided with a hot gas bypass valve.
  • the refrigerant flow direction in the hot gas bypass channel is opposite to the refrigerant flow direction in the refrigerant channel.
  • the condenser is an air-cooled condenser or a water-cooled condenser.
  • the refrigeration system further includes a condensing fan.
  • the condensation fan is arranged on one side of the condenser.
  • the evaporator is a system evaporator or a cold air evaporator.
  • the number of channels in the evaporator is three.
  • the evaporator also includes a heat source channel, the heat source channel is used to pass the refrigerant in the heat source loop;
  • the refrigeration system also includes a cold air fan, and the cold air fan is arranged on one side of the evaporator.
  • the heat source channel and the hot gas bypass channel pass through the interior of the refrigerant channel respectively.
  • the flow direction of the secondary refrigerant in the heat source channel is opposite to the flow direction of the refrigerant in the refrigerant channel.
  • the accurate temperature-controlled refrigeration system proposed by the utility model separates the high-temperature gaseous refrigerant from the hot gas bypass and the low-temperature refrigerant from the condenser by setting up an independent hot gas bypass channel in the evaporator. , through the heat exchange between the two, the cooling capacity is reduced, thereby achieving temperature control. At the same time, the problem of direct mixing of the two interfering with the expansion valve opening control in conventional designs is avoided, making the system operation more stable and the temperature control more accurate.
  • Figure 1 is a structural principle diagram of a refrigeration system in the prior art.
  • Figure 2 is a schematic structural diagram of a refrigeration system with accurate temperature control according to an embodiment of the present invention.
  • Figure 3 is a schematic structural diagram of the evaporator in the present utility model when it has three channels.
  • Figure 4 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
  • Figure 5 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
  • Figure 6 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
  • connection in the description of the present invention, unless otherwise expressly stipulated and limited, if the term "connection” appears to indicate the connection relationship between components, the term should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Disassembly and connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components.
  • connection can be a fixed connection or a removable connection.
  • Disassembly and connection, or integration it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components.
  • one embodiment of the present utility model proposes a refrigeration system with accurate temperature control, including: compressor 1, condenser 2, electronic expansion valve 3, evaporator 4, drying filter 5, and sight glass 6. Temperature Sensor 7, pressure sensor 8 and pressure switch 9.
  • the number of channels in the evaporator 4 is two or three, two of which are the hot gas bypass channel 401 and the refrigerant channel 402. Compressor 1, pressure switch 9.
  • Condenser 2 filter dryer 5, sight glass 6, evaporator 4, temperature sensor 7 and pressure sensor 8 are connected in series to form a closed refrigerant circuit, and the refrigerant circuit passes through the refrigerant channel 402 of the evaporator 4 , the exhaust port of the compressor 1 is connected to one end of the electronic expansion valve 3 near the sight glass 6 through a hot gas bypass, the hot gas bypass passes through the hot gas bypass channel 401, and a hot gas bypass valve 10 is provided in the hot gas bypass.
  • an independent hot gas bypass channel 401 is provided in the evaporator 4 to separate the high-temperature gaseous refrigerant from the hot gas bypass and the low-temperature refrigerant from the condenser 2, and reduce the cooling capacity through heat exchange between the two. function, thereby achieving temperature control, and at the same time avoiding the problem of direct mixing of the two interfering with the opening control of the electronic expansion valve 3 in conventional designs, making the system operation more stable and the temperature control more accurate.
  • the refrigerant flow direction in the hot gas bypass channel 401 is opposite to the refrigerant flow direction in the refrigerant channel 402 .
  • This structural design enables more complete heat exchange between the refrigerant in the hot gas bypass channel 401 and the refrigerant in the refrigerant channel 402.
  • the condenser 2 is an air-cooled condenser.
  • the condenser 2 is a water-cooled condenser.
  • the refrigeration system also includes a condensing fan 11, and the condensing fan 11 is disposed at the condensation point. side of device 2.
  • the evaporator 4 is a system evaporator, and the number of channels in the evaporator 4 is three.
  • the evaporator 4 also includes a heat source channel 403, and the heat source channel 403 is used to pass the brine in the heat source circuit;
  • the heat source loop includes: water tank 15, water pump 16, temperature sensor 7 and use end heat source 17.
  • Water tank 15, water pump 16, temperature sensor 7, use end heat source 17 and evaporator 4 are connected in series to form a closed heat source loop, and from The heat source channel 403 of the evaporator 4 passes through, and the secondary refrigerant in the heat source circuit is water, which is used for heat exchange with the refrigerant in the refrigerant channel 402 to achieve a cooling effect.
  • the evaporator 4 is a cold air evaporator, and the number of channels in the evaporator 4 is two.
  • the refrigeration system also includes a cold air fan 12.
  • the cold air fan 12 is provided on one side of the evaporator 4.
  • the heat source channel 403 and the hot gas bypass channel 401 pass through the interior of the refrigerant channel 402 .
  • This structural design enables the secondary refrigerant in the heat source channel 403 and the high-temperature gaseous refrigerant in the hot gas bypass channel 401 to fully interact with the low-temperature refrigerant in the refrigerant channel 402 respectively. heat exchange.
  • the flow direction of the brine in the heat source channel 403 is opposite to the flow direction of the refrigerant in the refrigerant channel 402 .
  • This structural design enables more complete heat exchange between the brine in the heat source channel 403 and the refrigerant in the refrigerant channel 402 .
  • the electronic expansion valve 3 can also be replaced by a thermal expansion valve 13, and both the temperature sensor 7 and the pressure sensor 8 are replaced by a temperature sensing bag 14.
  • the temperature sensing bag 14 is located at the evaporator. between the device 4 and the compressor 1, and the temperature sensing bulb 14 is connected to the thermal expansion valve 13.
  • the temperature sensing bulb 14 is used to control the opening of the expansion valve 13, and the position design of the temperature sensing bulb 14 can effectively avoid being affected by the hot gas bypass.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

Disclosed in the present utility model is a refrigeration system having accurate temperature control, comprising: a compressor, a condenser, an electronic expansion valve, an evaporator, a drying filter, a sight glass, a temperature sensor, a pressure sensor and a pressure switch, and being characterized in that the number of channels in the evaporator is two or three, the two channels respectively being a hot air bypass channel and a refrigerant channel; the compressor, the pressure switch, the condenser, the drying filter, the sight glass, the evaporator, the temperature sensor and the pressure sensor are successively connected in series to form a closed refrigerant loop, the refrigerant loop passing through the refrigerant channel of the evaporator; an exhaust port of the compressor is connected by means of the hot air bypass channel to the end of the electronic expansion valve close to the sight glass; a hot air bypass penetrates through the hot air bypass channel; and the hot air bypass is provided with a hot air bypass valve. The refrigeration system having accurate temperature control operates stably, exhibits more accurate temperature control, and is not prone to temperature fluctuation.

Description

准确控温的制冷系统Refrigeration system with accurate temperature control 技术领域Technical field
本实用新型涉及制冷技术领域，具体涉及一种准确控温的制冷系统。The utility model relates to the field of refrigeration technology, in particular to a refrigeration system with accurate temperature control.
背景技术Background technique
目前，在定速压缩式制冷系统中，控温可通过热气旁通实现。如图1所示，系统包括制冷剂回路和热源回路；制冷剂回路包括压缩机、冷凝器、电子膨胀阀、蒸发器、热气旁通阀、干燥过滤器、视液镜、温度传感器、压力传感器和压力开关；热源回路包括：水箱、水泵、使用端热源和温度传感器；其中蒸发器用于制冷剂和热源回路中的载冷剂换热；热气旁通从压缩机排气口接入到蒸发器入口，将压缩机排气口的热气引入到蒸发器，与经过电子膨胀阀节流后的来自冷凝器的低温制冷剂进行混合，通过冷热混合抵消部分制冷量从而实现控温。而制冷系统通过蒸发器出口的制冷剂过热度控制电子膨胀阀的开度。当热气和低温的制冷剂混合后，过热度将变大，不再只是受蒸发器内换热影响，异常的过热度会干扰电子膨胀阀开度的正常控制，使得制冷系统变得不稳定。Currently, in fixed-speed compression refrigeration systems, temperature control can be achieved through hot gas bypass. As shown in Figure 1, the system includes a refrigerant loop and a heat source loop; the refrigerant loop includes a compressor, condenser, electronic expansion valve, evaporator, hot gas bypass valve, dry filter, sight glass, temperature sensor, and pressure sensor. and pressure switch; the heat source circuit includes: water tank, water pump, user end heat source and temperature sensor; the evaporator is used for heat exchange of refrigerant and secondary refrigerant in the heat source circuit; the hot gas bypass is connected to the evaporator from the compressor exhaust port At the inlet, the hot gas from the exhaust port of the compressor is introduced into the evaporator and mixed with the low-temperature refrigerant from the condenser after throttling by the electronic expansion valve. Part of the cooling capacity is offset by hot and cold mixing to achieve temperature control. The refrigeration system controls the opening of the electronic expansion valve through the superheat of the refrigerant at the evaporator outlet. When hot gas and low-temperature refrigerant are mixed, the superheat will become larger and will no longer be affected only by the heat exchange in the evaporator. The abnormal superheat will interfere with the normal control of the opening of the electronic expansion valve, making the refrigeration system unstable.
实用新型内容Utility model content
本实用新型的目的在于提供一种准确控温的制冷系统，其运行稳定，控温更加准确。The purpose of this utility model is to provide a refrigeration system with accurate temperature control, which has stable operation and more accurate temperature control.
为达此目的，本实用新型采用以下技术方案：To achieve this purpose, the utility model adopts the following technical solutions:
提供一种准确控温的制冷系统，包括：压缩机、冷凝器、电子膨胀阀、蒸发器、干燥过滤器、视液镜、温度传感器、压力传感器和压力开关，其特征在于，所述蒸发器中的通道个数为两个或三个，其中有两个通道分别为热气旁通通道和制冷剂通道，所述压缩机、所述压力开关、所述冷凝器、所述干燥过滤器、所述视液镜、所述蒸发器、所述温度传感器和所述压力传感器依次串联成闭合的制冷剂回路，且所述制冷剂回路穿过所述蒸发器的制冷剂通道，所述压缩机的排气口通过热气旁通连接于所述电子膨胀阀靠近所述视液镜的一端，所述热气旁通穿过所述热气旁通通道，所述热气旁通设置有热气旁通阀。 A refrigeration system with accurate temperature control is provided, including: a compressor, a condenser, an electronic expansion valve, an evaporator, a drying filter, a sight glass, a temperature sensor, a pressure sensor and a pressure switch, characterized in that the evaporator The number of channels in is two or three, two of which are hot gas bypass channels and refrigerant channels. The compressor, the pressure switch, the condenser, the dry filter, the The sight glass, the evaporator, the temperature sensor and the pressure sensor are sequentially connected in series to form a closed refrigerant circuit, and the refrigerant circuit passes through the refrigerant channel of the evaporator, and the refrigerant circuit of the compressor The exhaust port is connected to an end of the electronic expansion valve close to the sight glass through a hot gas bypass, the hot gas bypass passes through the hot gas bypass channel, and the hot gas bypass is provided with a hot gas bypass valve.
作为准确控温的制冷系统的一种优选方案，所述热气旁通通道中制冷剂流动方向与所述制冷剂通道中制冷剂流动方向相反。As a preferred solution for an accurately temperature-controlled refrigeration system, the refrigerant flow direction in the hot gas bypass channel is opposite to the refrigerant flow direction in the refrigerant channel.
作为准确控温的制冷系统的一种优选方案，所述冷凝器为风冷式冷凝器或水冷式冷凝器，当所述冷凝器为风冷式冷凝器时，所述制冷系统还包括冷凝风机，所述冷凝风机设置于所述冷凝器的一侧。As a preferred solution for an accurately temperature-controlled refrigeration system, the condenser is an air-cooled condenser or a water-cooled condenser. When the condenser is an air-cooled condenser, the refrigeration system further includes a condensing fan. , the condensation fan is arranged on one side of the condenser.
作为准确控温的制冷系统的一种优选方案，所述蒸发器为系统蒸发器或冷风式蒸发器，当所述蒸发器为系统蒸发器时，所述蒸发器中的通道个数为三个，所述蒸发器中还包括热源通道，所述热源通道用于通过热源回路中的载冷剂；当所述蒸发器为冷风式蒸发器时，所述蒸发器中的通道个数为两个，所述制冷系统还包括冷风风机，所述冷风风机设置于所述蒸发器的一侧。As a preferred solution for an accurately temperature-controlled refrigeration system, the evaporator is a system evaporator or a cold air evaporator. When the evaporator is a system evaporator, the number of channels in the evaporator is three. , the evaporator also includes a heat source channel, the heat source channel is used to pass the refrigerant in the heat source loop; when the evaporator is a cold air evaporator, the number of channels in the evaporator is two , the refrigeration system also includes a cold air fan, and the cold air fan is arranged on one side of the evaporator.
作为准确控温的制冷系统的一种优选方案，所述热源通道和所述热气旁通通道分别穿过所述制冷剂通道的内部。As a preferred solution for an accurately temperature-controlled refrigeration system, the heat source channel and the hot gas bypass channel pass through the interior of the refrigerant channel respectively.
作为准确控温的制冷系统的一种优选方案，所述热源通道中的载冷剂流动方向与所述制冷剂通道中的制冷剂流动方向相反。As a preferred solution for an accurately temperature-controlled refrigeration system, the flow direction of the secondary refrigerant in the heat source channel is opposite to the flow direction of the refrigerant in the refrigerant channel.
本实用新型的有益效果：本实用新型提出的准确控温的制冷系统通过在蒸发器内设置独立的热气旁通通道，将热气旁通来的高温气态制冷剂和冷凝器来的低温制冷剂分开，通过两者的热交换达到降低制冷量，从而实现控温，同时避免常规设计中两者直接混合干扰膨胀阀开度控制的问题，使得系统运行更加稳定，控温更加准确。Beneficial effects of the utility model: The accurate temperature-controlled refrigeration system proposed by the utility model separates the high-temperature gaseous refrigerant from the hot gas bypass and the low-temperature refrigerant from the condenser by setting up an independent hot gas bypass channel in the evaporator. , through the heat exchange between the two, the cooling capacity is reduced, thereby achieving temperature control. At the same time, the problem of direct mixing of the two interfering with the expansion valve opening control in conventional designs is avoided, making the system operation more stable and the temperature control more accurate.
附图说明Description of drawings
为了更清楚地说明本实用新型实施例的技术方案，下面将对本实用新型实施例中所需要使用的附图作简单地介绍。显而易见地，下面所描述的附图仅仅是本实用新型的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the technical solutions of the embodiments of the present utility model more clearly, the drawings required to be used in the embodiments of the present utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.
图1是现有技术中制冷系统的结构原理图。Figure 1 is a structural principle diagram of a refrigeration system in the prior art.
图2是本实用新型一实施例所述的准确控温的制冷系统的结构原理图。Figure 2 is a schematic structural diagram of a refrigeration system with accurate temperature control according to an embodiment of the present invention.
图3是本实用新型中蒸发器为三通道时的结构示意图。Figure 3 is a schematic structural diagram of the evaporator in the present utility model when it has three channels.
图4是本实用新型另一实施例所述的准确控温的制冷系统的结构原理图。 Figure 4 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
图5是本实用新型又一实施例所述的准确控温的制冷系统的结构原理图。Figure 5 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
图6是本实用新型又一实施例所述的准确控温的制冷系统的结构原理图。Figure 6 is a schematic structural diagram of a refrigeration system with accurate temperature control according to another embodiment of the present invention.
图中：
1、压缩机；2、冷凝器；3、电子膨胀阀；4、蒸发器；401、热气旁通通道；
402、制冷剂通道；403、热源通道；5、干燥过滤器；6、视液镜；7、温度传感器；8、压力传感器；9、压力开关；10、热气旁通阀；11、冷凝风机；12、冷风风机；13、热力膨胀阀；14、感温包；15、水箱；16、水泵；17、使用端热源。In the picture:
1. Compressor; 2. Condenser; 3. Electronic expansion valve; 4. Evaporator; 401. Hot gas bypass channel;
402. Refrigerant channel; 403. Heat source channel; 5. Drying filter; 6. Sight glass; 7. Temperature sensor; 8. Pressure sensor; 9. Pressure switch; 10. Hot gas bypass valve; 11. Condensing fan; 12. Cooling fan; 13. Thermal expansion valve; 14. Temperature sensing bag; 15. Water tank; 16. Water pump; 17. Heat source at the end of use.
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本实用新型的技术方案。The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementations.
其中，附图仅用于示例性说明，表示的仅是示意图，而非实物图，不能理解为对本专利的限制；为了更好地说明本实用新型的实施例，附图某些部件会有省略、放大或缩小，并不代表实际产品的尺寸；对本领域技术人员来说，附图中某些公知结构及其说明可能省略是可以理解的。The drawings are only for illustrative purposes and represent only schematic diagrams rather than actual drawings, which cannot be understood as limitations of this patent. In order to better illustrate the embodiments of the present utility model, some components of the drawings are omitted. , enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
本实用新型实施例的附图中相同或相似的标号对应相同或相似的部件；在本实用新型的描述中，需要理解的是，若出现术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本实用新型和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此附图中描述位置关系的用语仅用于示例性说明，不能理解为对本专利的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。In the drawings of the embodiments of the present utility model, the same or similar numbers correspond to the same or similar components; in the description of the present utility model, it should be understood that if the terms "upper", "lower", "left" and "left" appear, The directions or positional relationships indicated by "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the device referred to. Or elements must have specific orientations, be constructed and operated in specific orientations, therefore the terms describing positional relationships in the drawings are only for illustrative purposes and cannot be construed as limitations to this patent. For those of ordinary skill in the art, The specific meanings of the above terms can be understood according to specific circumstances.
在本实用新型的描述中，除非另有明确的规定和限定，若出现术语“连接”等指示部件之间的连接关系，该术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个部件内部的连通或两个部件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本实用新型中的具体含义。In the description of the present invention, unless otherwise expressly stipulated and limited, if the term "connection" appears to indicate the connection relationship between components, the term should be understood in a broad sense. For example, it can be a fixed connection or a removable connection. Disassembly and connection, or integration; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two components or an interaction between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.
参照图2和3,本实用新型一实施例提出了一种准确控温的制冷系统，包括：压缩机1、冷凝器2、电子膨胀阀3、蒸发器4、干燥过滤器5、视液镜6、温度 传感器7、压力传感器8和压力开关9,蒸发器4中的通道个数为两个或三个，其中有两个通道分别为热气旁通通道401和制冷剂通道402,压缩机1、压力开关9、冷凝器2、干燥过滤器5、视液镜6、蒸发器4、温度传感器7和压力传感器8依次串联成闭合的制冷剂回路，且制冷剂回路穿过蒸发器4的制冷剂通道402,压缩机1的排气口通过热气旁通连接于电子膨胀阀3靠近视液镜6的一端，热气旁通穿过热气旁通通道401,热气旁通设置有热气旁通阀10。Referring to Figures 2 and 3, one embodiment of the present utility model proposes a refrigeration system with accurate temperature control, including: compressor 1, condenser 2, electronic expansion valve 3, evaporator 4, drying filter 5, and sight glass 6. Temperature Sensor 7, pressure sensor 8 and pressure switch 9. The number of channels in the evaporator 4 is two or three, two of which are the hot gas bypass channel 401 and the refrigerant channel 402. Compressor 1, pressure switch 9. Condenser 2, filter dryer 5, sight glass 6, evaporator 4, temperature sensor 7 and pressure sensor 8 are connected in series to form a closed refrigerant circuit, and the refrigerant circuit passes through the refrigerant channel 402 of the evaporator 4 , the exhaust port of the compressor 1 is connected to one end of the electronic expansion valve 3 near the sight glass 6 through a hot gas bypass, the hot gas bypass passes through the hot gas bypass channel 401, and a hot gas bypass valve 10 is provided in the hot gas bypass.
上述技术方案中，蒸发器内4设置独立的热气旁通通道401,将热气旁通来的高温气态制冷剂和冷凝器2来的低温制冷剂分开，通过两者的热交换达到降低制冷量的作用，从而实现控温，同时避免常规设计中两者直接混合干扰电子膨胀阀3开度控制的问题，使得系统运行更加稳定，控温更加准确。In the above technical solution, an independent hot gas bypass channel 401 is provided in the evaporator 4 to separate the high-temperature gaseous refrigerant from the hot gas bypass and the low-temperature refrigerant from the condenser 2, and reduce the cooling capacity through heat exchange between the two. function, thereby achieving temperature control, and at the same time avoiding the problem of direct mixing of the two interfering with the opening control of the electronic expansion valve 3 in conventional designs, making the system operation more stable and the temperature control more accurate.
在本实施例中，热气旁通通道401中制冷剂流动方向与制冷剂通道402中制冷剂流动方向相反。此结构方案设计使得热气旁通通道401中的制冷剂与制冷剂通道402中的制冷剂的热交换更加充分。In this embodiment, the refrigerant flow direction in the hot gas bypass channel 401 is opposite to the refrigerant flow direction in the refrigerant channel 402 . This structural design enables more complete heat exchange between the refrigerant in the hot gas bypass channel 401 and the refrigerant in the refrigerant channel 402.
在本实施例中，冷凝器2为风冷式冷凝器。In this embodiment, the condenser 2 is an air-cooled condenser.
在其他一些实施例中，如图5或6所示，冷凝器2为水冷式冷凝器，当冷凝器2为风冷式冷凝器时，制冷系统还包括冷凝风机11,冷凝风机11设置于冷凝器2的一侧。In some other embodiments, as shown in Figure 5 or 6, the condenser 2 is a water-cooled condenser. When the condenser 2 is an air-cooled condenser, the refrigeration system also includes a condensing fan 11, and the condensing fan 11 is disposed at the condensation point. side of device 2.
在本实施例中，蒸发器4为系统蒸发器，蒸发器4中的通道个数为三个，蒸发器4中还包括热源通道403,热源通道403用于通过热源回路中的载冷剂；具体地，热源回路包括：水箱15、水泵16、温度传感器7和使用端热源17,水箱15、水泵16、温度传感器7、使用端热源17和蒸发器4依次串联成闭合的热源回路，且从蒸发器4的热源通道403穿过，而热源回路中的载冷剂为水，用于与制冷剂通道402中的制冷剂进行热交换，达到降温的效果。In this embodiment, the evaporator 4 is a system evaporator, and the number of channels in the evaporator 4 is three. The evaporator 4 also includes a heat source channel 403, and the heat source channel 403 is used to pass the brine in the heat source circuit; Specifically, the heat source loop includes: water tank 15, water pump 16, temperature sensor 7 and use end heat source 17. Water tank 15, water pump 16, temperature sensor 7, use end heat source 17 and evaporator 4 are connected in series to form a closed heat source loop, and from The heat source channel 403 of the evaporator 4 passes through, and the secondary refrigerant in the heat source circuit is water, which is used for heat exchange with the refrigerant in the refrigerant channel 402 to achieve a cooling effect.
在其他一些实施例中，如图4、5或6所示，蒸发器4为冷风式蒸发器，蒸发器4中的通道个数为两个，制冷系统还包括冷风风机12,冷风风机12设置于蒸发器4的一侧。In some other embodiments, as shown in Figure 4, 5 or 6, the evaporator 4 is a cold air evaporator, and the number of channels in the evaporator 4 is two. The refrigeration system also includes a cold air fan 12. The cold air fan 12 is provided on one side of the evaporator 4.
在本实施例中，如图3所示，热源通道403和热气旁通通道401分穿过制冷剂通道402的内部。此结构方案设计使得热源通道403中的载冷剂和热气旁通通道401中的高温气态制冷剂能分别与制冷剂通道402中的低温制冷剂进行充分 热交换。In this embodiment, as shown in FIG. 3 , the heat source channel 403 and the hot gas bypass channel 401 pass through the interior of the refrigerant channel 402 . This structural design enables the secondary refrigerant in the heat source channel 403 and the high-temperature gaseous refrigerant in the hot gas bypass channel 401 to fully interact with the low-temperature refrigerant in the refrigerant channel 402 respectively. heat exchange.
在本实施例中，热源通道403中的载冷剂流动方向与制冷剂通道402中的制冷剂流动方向相反。此结构方案设计使得热源通道403中的载冷剂和制冷剂通道402中的制冷剂热交换更加充分。In this embodiment, the flow direction of the brine in the heat source channel 403 is opposite to the flow direction of the refrigerant in the refrigerant channel 402 . This structural design enables more complete heat exchange between the brine in the heat source channel 403 and the refrigerant in the refrigerant channel 402 .
在其他一些实施例中，如图6所示，电子膨胀阀3还可以替换为热力膨胀阀13,且温度传感器7和压力传感器8两者替换为一个感温包14,感温包14位于蒸发器4和压缩机1之间，且感温包14连接于热力膨胀阀13。感温包14用于控制膨胀阀13的开度，且感温包14的位置设计能有效避免受到热气旁通的影响。In some other embodiments, as shown in Figure 6, the electronic expansion valve 3 can also be replaced by a thermal expansion valve 13, and both the temperature sensor 7 and the pressure sensor 8 are replaced by a temperature sensing bag 14. The temperature sensing bag 14 is located at the evaporator. between the device 4 and the compressor 1, and the temperature sensing bulb 14 is connected to the thermal expansion valve 13. The temperature sensing bulb 14 is used to control the opening of the expansion valve 13, and the position design of the temperature sensing bulb 14 can effectively avoid being affected by the hot gas bypass.
需要声明的是，上述具体实施方式仅仅为本实用新型的较佳实施例及所运用技术原理。本领域技术人员应该明白，还可以对本实用新型做各种修改、等同替换、变化等等。但是，这些变换只要未背离本实用新型的精神，都应在本实用新型的保护范围之内。另外，本申请说明书和权利要求书所使用的一些术语并不是限制，仅仅是为了便于描述。 It should be noted that the above-mentioned specific implementation modes are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can also be made to the present utility model. However, as long as these transformations do not deviate from the spirit of the present utility model, they should be within the protection scope of the present utility model. In addition, some terms used in the description and claims of this application are not limiting, but are merely used to facilitate description.

Claims (6)

  1. 一种准确控温的制冷系统，包括：压缩机(1)、冷凝器(2)、电子膨胀阀(3)、蒸发器(4)、干燥过滤器(5)、视液镜(6)、温度传感器(7)、压力传感器(8)和压力开关(9),其特征在于，所述蒸发器(4)中的通道个数为两个或三个，其中有两个通道分别为热气旁通通道(401)和制冷剂通道(402),所述压缩机(1)、所述压力开关(9)、所述冷凝器(2)、所述干燥过滤器(5)、所述视液镜(6)、所述蒸发器(4)、所述温度传感器(7)和所述压力传感器(8)依次串联成闭合的制冷剂回路，且所述制冷剂回路穿过所述蒸发器(4)的制冷剂通道(402),所述压缩机(1)的排气口通过热气旁通连接于所述电子膨胀阀(3)靠近所述视液镜(6)的一端，所述热气旁通穿过所述热气旁通通道(401),所述热气旁通设置有热气旁通阀(10)。A refrigeration system with accurate temperature control, including: compressor (1), condenser (2), electronic expansion valve (3), evaporator (4), drying filter (5), sight glass (6), Temperature sensor (7), pressure sensor (8) and pressure switch (9) are characterized in that the number of channels in the evaporator (4) is two or three, two of which are adjacent to the hot gas. Passage channel (401) and refrigerant channel (402), the compressor (1), the pressure switch (9), the condenser (2), the dry filter (5), the sight liquid The mirror (6), the evaporator (4), the temperature sensor (7) and the pressure sensor (8) are sequentially connected in series to form a closed refrigerant circuit, and the refrigerant circuit passes through the evaporator ( 4) of the refrigerant channel (402), the exhaust port of the compressor (1) is connected to one end of the electronic expansion valve (3) close to the sight glass (6) through a hot gas bypass, and the hot gas The bypass passes through the hot gas bypass channel (401), and the hot gas bypass is provided with a hot gas bypass valve (10).
  2. 根据权利要求1所述的准确控温的制冷系统，其特征在于，所述热气旁通通道(401)中制冷剂流动方向与所述制冷剂通道(402)中制冷剂流动方向相反。The refrigeration system with accurate temperature control according to claim 1, characterized in that the refrigerant flow direction in the hot gas bypass channel (401) is opposite to the refrigerant flow direction in the refrigerant channel (402).
  3. 根据权利要求1所述的准确控温的制冷系统，其特征在于，所述冷凝器(2)为风冷式冷凝器或水冷式冷凝器，当所述冷凝器(2)为风冷式冷凝器时，所述制冷系统还包括冷凝风机(11),所述冷凝风机(11)设置于所述冷凝器(2)的一侧。The refrigeration system with accurate temperature control according to claim 1, characterized in that the condenser (2) is an air-cooled condenser or a water-cooled condenser. When the condenser (2) is an air-cooled condenser, When used as a condenser, the refrigeration system further includes a condensing fan (11), which is disposed on one side of the condenser (2).
  4. 根据权利要求1所述的准确控温的制冷系统，其特征在于，所述蒸发器(4)为系统蒸发器或冷风式蒸发器，当所述蒸发器(4)为系统蒸发器时，所述蒸发器(4)中的通道个数为三个，所述蒸发器(4)中还包括热源通道(403),所述热源通道(403)用于通过热源回路中的载冷剂；当所述蒸发器(4)为冷风式蒸发器时，所述蒸发器(4)中的通道个数为两个，所述制冷系统还包括冷风风机(12),所述冷风风机(12)设置于所述蒸发器(4)的一侧。The refrigeration system with accurate temperature control according to claim 1, characterized in that the evaporator (4) is a system evaporator or a cold air evaporator. When the evaporator (4) is a system evaporator, the evaporator (4) is a system evaporator. The number of channels in the evaporator (4) is three, and the evaporator (4) also includes a heat source channel (403), and the heat source channel (403) is used to pass the brine in the heat source circuit; when When the evaporator (4) is a cold air evaporator, the number of channels in the evaporator (4) is two, and the refrigeration system also includes a cold air fan (12). The cold air fan (12) is provided with on one side of the evaporator (4).
  5. 根据权利要求4所述的准确控温的制冷系统，其特征在于，所述热源通道(403)和所述热气旁通通道(401)分别穿过所述制冷剂通道(402)的内部。The refrigeration system with accurate temperature control according to claim 4, characterized in that the heat source channel (403) and the hot gas bypass channel (401) respectively pass through the interior of the refrigerant channel (402).
  6. 根据权利要求4所述的准确控温的制冷系统，其特征在于，所述热源通道(403)中的载冷剂流动方向与所述制冷剂通道(402)中的制冷剂流动方向相反。 The refrigeration system with accurate temperature control according to claim 4, characterized in that the flow direction of the secondary refrigerant in the heat source channel (403) is opposite to the flow direction of the refrigerant in the refrigerant channel (402).
PCT/CN2023/103279 2022-06-29 2023-06-28 Refrigeration system having accurate temperature control WO2024002177A1 (en)

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