CN112594952A - Ultra-low temperature frequency conversion cascade air source heat pump unit - Google Patents

Ultra-low temperature frequency conversion cascade air source heat pump unit Download PDF

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Publication number
CN112594952A
CN112594952A CN202011485582.9A CN202011485582A CN112594952A CN 112594952 A CN112594952 A CN 112594952A CN 202011485582 A CN202011485582 A CN 202011485582A CN 112594952 A CN112594952 A CN 112594952A
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CN
China
Prior art keywords
communicated
outlet
inlet
temperature sensor
valve
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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.)
Pending
Application number
CN202011485582.9A
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Chinese (zh)
Inventor
李凯锋
奚伟基
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
A Ol Spain Ningbo Euro Solar Group Co ltd
Original Assignee
A Ol Spain Ningbo Euro Solar Group Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by A Ol Spain Ningbo Euro Solar Group Co ltd filed Critical A Ol Spain Ningbo Euro Solar Group Co ltd
Priority to CN202011485582.9A priority Critical patent/CN112594952A/en
Publication of CN112594952A publication Critical patent/CN112594952A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B7/00Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plants or systems

Abstract

The invention discloses an air source heat pump unit, which adopts an intermediate heat exchanger to overlap two heating systems together and is provided with a heater and a capillary tube, wherein the heater can heat a refrigerant of a first heating system, and the capillary tube can supplement air to a second compressor of a second heating system to increase enthalpy. The invention can be operated in the ultra-low temperature environment.

Description

Ultra-low temperature frequency conversion cascade air source heat pump unit
Technical Field
The invention relates to an ultra-low temperature frequency conversion cascade air source heat pump unit.
Background
The heating operation standard working condition of the air source heat pump specified by national standard GB/T18430.1-2007 Cold Water (Heat Pump) Unit for Industrial or commercial use and similar uses of part 1 of steam compression cycle Cold Water (Heat Pump) Unit, GB/T18430.2-2007 Cold Water (Heat Pump) Unit for household use and similar uses of part 2 of steam compression cycle Cold Water (Heat Pump) Unit is that the ambient temperature is 7 ℃, hot water at 45 ℃ is prepared, and the minimum ambient temperature can be operated at-7 ℃; national standard GB/T25127.1-2010 part 1 of low ambient temperature air source heat pump (chiller) unit: heat pump (chiller) units for industrial or commercial use and similar applications, GB/T25127.2-2010 "low ambient temperature air source heat pump (chiller) unit part 2: the standard working condition of the low-ring-temperature air source heat pump heating operation specified in the heat pump (cold water) unit for household and similar purposes is that the ambient temperature is-12 ℃, hot water at 41 ℃ is prepared, and the air source heat pump can operate when the lowest ambient temperature reaches-20 ℃. However, in northern areas, the ambient temperature in winter is often lower than-20 ℃, and air source heat pumps meeting the above-mentioned standards cannot be operated in these areas.
Disclosure of Invention
The invention aims to solve the technical problem of providing an ultralow-temperature frequency conversion cascade air source heat pump unit which can operate in an ultralow-temperature environment.
In order to solve the technical problem, the ultralow temperature frequency conversion cascade air source heat pump unit provided by the invention comprises an evaporator, a first compressor, a four-way valve, a first gas-liquid separator, an intermediate heat exchanger, a liquid storage device, a first filter, a first electronic expansion valve, a second gas-liquid separator, a second compressor, a condenser, a capillary tube, an electromagnetic valve, a flash evaporator, a second filter, a second electronic expansion valve, a first one-way valve, a second one-way valve and a heater;
the outlet of the evaporator is communicated with a first inlet of the four-way valve, the first outlet of the four-way valve is communicated with the inlet of a first gas-liquid separator, the gas outlet of the first gas-liquid separator is communicated with the inlet of a first compressor, the outlet of the first compressor is communicated with a second inlet of the four-way valve, the second outlet of the four-way valve is communicated with the inlet of a first one-way valve, the outlet of the first one-way valve is communicated with the inlet end of a first heat exchange pipeline of the intermediate heat exchanger, the outlet end of the first heat exchange pipeline of the intermediate heat exchanger is communicated with the inlet of a liquid storage device, the outlet of the liquid storage device is communicated with one end of a first filter, the other end of the first filter is communicated with one end of a first electronic expansion;
the outlet end of a second heat exchange pipeline of the intermediate heat exchanger is communicated with the inlet of a second gas-liquid separator, the gas outlet of the second gas-liquid separator is communicated with the inlet of a second compressor, the outlet of the second compressor is communicated with the inlet of a condenser, the outlet of the condenser is communicated with the inlet of a flash evaporator, the liquid outlet of the flash evaporator is communicated with one end of a second filter, the other end of the second filter is communicated with one end of a second electronic expansion valve, the other end of the second electronic expansion valve is communicated with the inlet end of the second heat exchange pipeline of the intermediate heat exchanger, the gas outlet of the flash evaporator is communicated with one end of an electromagnetic valve, the other end of the electromagnetic valve is communicated with one end of a capillary tube, and the other end of the capillary;
the inlet of the second one-way valve is communicated with the outlet end of the first heat exchange pipeline of the intermediate heat exchanger, the outlet of the second one-way valve is connected with one end of the heater, and the other end of the heater is communicated with the inlet of the first one-way valve.
Preferably, the condenser is connected with a water inlet pipe and a water outlet pipe, a first temperature sensor is arranged in the water inlet pipe, a second temperature sensor is arranged in the water outlet pipe, the first temperature sensor and the second temperature sensor are both electrically connected with the input end of a controller, and the output end of the controller is respectively electrically connected with the heater and the electromagnetic valve.
Preferably, when the difference between the second temperature sensor and the first temperature sensor is less than or equal to X, the heater is operated, and the electromagnetic valve is opened; when the difference value between the second temperature sensor and the first temperature sensor is larger than X and smaller than Y, the heater is closed, but the electromagnetic valve is opened; when the difference between the second temperature sensor and the first temperature sensor is greater than or equal to Y, the heater is closed, and the electromagnetic valve is opened.
After adopting the structure, compared with the prior art, the invention has the following advantages:
according to the air source heat pump unit, the two heating systems are overlapped together by the intermediate heat exchanger, the heater and the capillary tube are arranged, the heater can heat a refrigerant of the first heating system, and the capillary tube can supply air to the second compressor of the second heating system to increase enthalpy, so that the air source heat pump unit can work in an environment of 40 ℃ below zero, and the heating effect is good.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the ultralow temperature frequency conversion overlapping type air source heat pump unit of the invention comprises an evaporator 1, a first compressor 2, a four-way valve 3, a first gas-liquid separator 4, an intermediate heat exchanger 5, a liquid storage 6, a first filter 7, a first electronic expansion valve 8, a second gas-liquid separator 9, a second compressor 10, a condenser 11, a capillary tube 12, an electromagnetic valve 13, a flash evaporator 14, a second filter 15, a second electronic expansion valve 16, a first one-way valve 17, a second one-way valve 18 and a heater 19.
The outlet of the evaporator 1 is communicated with the first inlet of the four-way valve 3, the first outlet of the four-way valve 3 is communicated with the inlet of the first gas-liquid separator 4, when in operation, a channel for communicating the first inlet and the first outlet is arranged in the four-way valve 3, the air outlet of the first gas-liquid separator 4 is communicated with the inlet of the first compressor 2, the outlet of the first compressor 2 is communicated with the second inlet of the four-way valve 3, the second outlet of the four-way valve 3 is communicated with the inlet of the first one-way valve 17, when in operation, a channel for communicating the second inlet and the second outlet is arranged in the four-way valve 3, the outlet of the first one-way valve 17 is communicated with the inlet end of the first heat exchange pipeline of the intermediate heat exchanger 5, the outlet end of the first heat exchange pipeline of the intermediate heat exchanger 5 is communicated with the inlet of the liquid storage 6, the outlet of the liquid storage 6 is communicated with, the other end of the first electronic expansion valve 8 is communicated with the inlet of the evaporator 1.
The outlet end of the second heat exchange pipeline of the intermediate heat exchanger 5 is communicated with the inlet of the second gas-liquid separator 9, the gas outlet of the second gas-liquid separator 9 is communicated with the inlet of the second compressor 10, the outlet of the second compressor 10 is communicated with the inlet of the condenser 11, the outlet of the condenser 11 is communicated with the inlet of the flash evaporator 14, the liquid outlet of the flash evaporator 14 is communicated with one end of the second filter 15, the other end of the second filter 15 is communicated with one end of the second electronic expansion valve 16, the other end of the second electronic expansion valve 16 is communicated with the inlet end of the second heat exchange pipeline of the intermediate heat exchanger 5, the gas outlet of the flash evaporator 14 is communicated with one end of the electromagnetic valve 13, the other end of the electromagnetic valve 13 is communicated with one end of the capillary tube 12, the other end of the capillary tube 12 is communicated with the gas supplementing port of the second, the gas generated by the flash evaporator 14 passes through the solenoid valve 13 and the capillary tube 12 in sequence, and then enters the second compressor 10 to increase the power of the second compressor 10.
An inlet of the second check valve 18 is communicated with an outlet end of the first heat exchange pipeline of the intermediate heat exchanger 5, an outlet of the second check valve 18 is connected with one end of a heater 19, and the other end of the heater 19 is communicated with an inlet of the first check valve 17, so that the heater 19 can heat the refrigerant flowing through.
The condenser 11 is connected with a water inlet pipe 111 and a water outlet pipe 112, a first temperature sensor is arranged in the water inlet pipe 111, a second temperature sensor is arranged in the water outlet pipe 112, the first temperature sensor and the second temperature sensor are both electrically connected with an input end of a controller, and an output end of the controller is respectively electrically connected with the heater 19 and the electromagnetic valve 13.
When the difference between the second temperature sensor and the first temperature sensor is less than or equal to X, the heater 19 operates, and the electromagnetic valve 13 is opened; when the difference between the second temperature sensor and the first temperature sensor is greater than X and less than Y, the heater 19 is closed, but the electromagnetic valve 13 is opened; when the difference between the second temperature sensor and the first temperature sensor is equal to or greater than Y, the heater 19 is closed, and the electromagnetic valve 13 is opened.
The specific values of X and Y can be preset, so that the actions of the heater 19 and the electromagnetic valve 13 can be controlled according to the heating effect of the air source heat pump unit on the inlet water, so as to adjust the working state of the air source heat pump unit.
The above description is only about the preferred embodiment of the present invention, but it should not be understood as limiting the claims, and the present invention may be modified in other structures, not limited to the above structures. In general, all changes which come within the scope of the invention as defined by the independent claims are intended to be embraced therein.

Claims (3)

1. An ultra-low temperature frequency conversion overlapping type air source heat pump unit is characterized by comprising an evaporator (1), a first compressor (2), a four-way valve (3), a first gas-liquid separator (4), an intermediate heat exchanger (5), a liquid storage device (6), a first filter (7), a first electronic expansion valve (8), a second gas-liquid separator (9), a second compressor (10), a condenser (11), a capillary tube (12), an electromagnetic valve (13), a flash evaporator (14), a second filter (15), a second electronic expansion valve (16), a first one-way valve (17), a second one-way valve (18) and a heater (19);
an outlet of the evaporator (1) is communicated with a first inlet of a four-way valve (3), a first outlet of the four-way valve (3) is communicated with an inlet of a first gas-liquid separator (4), an air outlet of the first gas-liquid separator (4) is communicated with an inlet of a first compressor (2), an outlet of the first compressor (2) is communicated with a second inlet of the four-way valve (3), a second outlet of the four-way valve (3) is communicated with an inlet of a first one-way valve (17), an outlet of the first one-way valve (17) is communicated with an inlet end of a first heat exchange pipeline of an intermediate heat exchanger (5), an outlet end of the first heat exchange pipeline of the intermediate heat exchanger (5) is communicated with an inlet of a liquid accumulator (6), an outlet of the liquid accumulator (6) is communicated with one end of a first filter (7), and the other end of the first filter (7) is communicated with one end of a first electronic, the other end of the first electronic expansion valve (8) is communicated with the inlet of the evaporator (1);
the outlet end of a second heat exchange pipeline of the intermediate heat exchanger (5) is communicated with the inlet of a second gas-liquid separator (9), the gas outlet of the second gas-liquid separator (9) is communicated with the inlet of a second compressor (10), the outlet of the second compressor (10) is communicated with the inlet of a condenser (11), the outlet of the condenser (11) is communicated with the inlet of a flash evaporator (14), the liquid outlet of the flash evaporator (14) is communicated with one end of a second filter (15), the other end of the second filter (15) is communicated with one end of a second electronic expansion valve (16), the other end of the second electronic expansion valve (16) is communicated with the inlet end of the second heat exchange pipeline of the intermediate heat exchanger (5), the gas outlet of the flash evaporator (14) is communicated with one end of an electromagnetic valve (13), and the other end of the electromagnetic valve (13) is communicated with one end of a capillary tube (12), the other end of the capillary tube (12) is communicated with an air supplement port of the second compressor (10);
an inlet of the second check valve (18) is communicated with an outlet end of a first heat exchange pipeline of the intermediate heat exchanger (5), an outlet of the second check valve (18) is connected with one end of a heater (19), and the other end of the heater (19) is communicated with an inlet of the first check valve (17).
2. The ultra-low temperature frequency conversion overlapping type air source heat pump unit according to claim 1, characterized in that the condenser (11) is connected with a water inlet pipe (111) and a water outlet pipe (112), a first temperature sensor is arranged in the water inlet pipe (111), a second temperature sensor is arranged in the water outlet pipe (112), the first temperature sensor and the second temperature sensor are both electrically connected with an input end of a controller, and an output end of the controller is respectively electrically connected with the heater (19) and the electromagnetic valve (13).
3. The ultra-low temperature frequency conversion overlapping type air source heat pump unit according to claim 2, characterized in that when the difference between the second temperature sensor and the first temperature sensor is less than or equal to X, the heater (19) works and the electromagnetic valve (13) is opened; when the difference value between the second temperature sensor and the first temperature sensor is larger than X and smaller than Y, the heater (19) is closed, but the electromagnetic valve (13) is opened; when the difference between the second temperature sensor and the first temperature sensor is equal to or greater than Y, the heater (19) is closed and the solenoid valve (13) is opened.
CN202011485582.9A 2020-12-16 2020-12-16 Ultra-low temperature frequency conversion cascade air source heat pump unit Pending CN112594952A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011485582.9A CN112594952A (en) 2020-12-16 2020-12-16 Ultra-low temperature frequency conversion cascade air source heat pump unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011485582.9A CN112594952A (en) 2020-12-16 2020-12-16 Ultra-low temperature frequency conversion cascade air source heat pump unit

Publications (1)

Publication Number Publication Date
CN112594952A true CN112594952A (en) 2021-04-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011485582.9A Pending CN112594952A (en) 2020-12-16 2020-12-16 Ultra-low temperature frequency conversion cascade air source heat pump unit

Country Status (1)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100147006A1 (en) * 2007-06-04 2010-06-17 Taras Michael F Refrigerant system with cascaded circuits and performance enhancement features
CN102230650A (en) * 2011-05-25 2011-11-02 宁波奥克斯空调有限公司 Air conditioning system with multiple heating modes
CN108626118A (en) * 2018-05-25 2018-10-09 珠海格力节能环保制冷技术研究中心有限公司 Compressor and heat-exchange system with it
CN209197193U (en) * 2018-11-13 2019-08-02 科希曼电器有限公司 A kind of Bidirectional cascade heat pump circulating system
CN209371555U (en) * 2019-01-07 2019-09-10 李国伟 Ultra low temperature overlapping heat pump unit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100147006A1 (en) * 2007-06-04 2010-06-17 Taras Michael F Refrigerant system with cascaded circuits and performance enhancement features
CN102230650A (en) * 2011-05-25 2011-11-02 宁波奥克斯空调有限公司 Air conditioning system with multiple heating modes
CN108626118A (en) * 2018-05-25 2018-10-09 珠海格力节能环保制冷技术研究中心有限公司 Compressor and heat-exchange system with it
CN209197193U (en) * 2018-11-13 2019-08-02 科希曼电器有限公司 A kind of Bidirectional cascade heat pump circulating system
CN209371555U (en) * 2019-01-07 2019-09-10 李国伟 Ultra low temperature overlapping heat pump unit

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