CN111059738A - Heat recovery side control system of heat recovery centrifugal unit - Google Patents
Heat recovery side control system of heat recovery centrifugal unit Download PDFInfo
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- CN111059738A CN111059738A CN201911239021.8A CN201911239021A CN111059738A CN 111059738 A CN111059738 A CN 111059738A CN 201911239021 A CN201911239021 A CN 201911239021A CN 111059738 A CN111059738 A CN 111059738A
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- 238000011084 recovery Methods 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 203
- 238000001816 cooling Methods 0.000 claims description 6
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000003507 refrigerant Substances 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/85—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using variable-flow pumps
-
- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- 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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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]
- Y02B30/56—Heat recovery units
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to a heat recovery centrifugal unit heat recovery side control system, which comprises a heat recovery system and a main controller, wherein the heat recovery system comprises an evaporator, a condenser, a heat recoverer, a compressor and an expansion valve; the evaporator is connected with a first water pipeline, and a first water pump is arranged on the first water pipeline; the condenser is connected with a second water through pipeline, and a second water pump is arranged on the second water through pipeline; the heat recoverer is connected with a third water passing pipeline, and a third water pump and a temperature sensor are arranged on the third water passing pipeline; the main controller is respectively connected with the first water pump and the temperature sensor, and the main controller is suitable for controlling the working frequency of the first water pump according to the temperature of the temperature sensor. The water outlet temperature of the third water passing pipeline is controlled according to the working frequency of the first water pump controlled by the main controller, so that the second water pump can be prevented from being started, and the energy consumption of the system is reduced.
Description
Technical Field
The invention relates to a heat recovery side control system of a heat recovery centrifugal unit.
Background
With the widespread use of central air conditioning systems, energy conservation has become a focus of attention. In a central air-conditioning system of a building, a user with large power consumption is a freezing station, so that the energy conservation of the central air-conditioning system becomes the key for the energy conservation of the central air-conditioning system.
A group control system for a freezing station utilizes computer control, communication and automatic control technologies to provide centralized automatic control and energy consumption optimization for a plurality of refrigerating units, water pumps, cooling towers and valves and meets various control energy-saving requirements of users on a water system.
The heat recovery unit is current ripe product, and its theory of operation is the same with air conditioner refrigeration principle, through the refrigerant circulation realization between evaporimeter, condenser, heat recoverer to the transmission of heat, can specifically refer to for example patent no: 200710040125.7, the patent names: a heat recovery type water chiller;
in a conventional heat recovery centrifugal unit heat recovery side control system, as shown in fig. 1, an evaporator in a heat recovery chiller is connected to a first water passage; the condenser is connected with a second water through pipeline, an adjusting valve is arranged on the second water through pipeline and used for controlling the opening of the pipeline, and the second water through pipeline is connected with the cooling tower; the heat recoverer is connected with a third water passing pipeline, a first water pump 10 is arranged on the first water passing pipeline, a second water pump 20 is arranged on the second water passing pipeline, and a third water pump 30 is arranged on the third water passing pipeline;
the first water pipeline circulates hot water, after heat exchange with the evaporator, the refrigerant in the evaporator is vaporized, under the action of the compressor, the refrigerant after being heated and vaporized is sequentially subjected to heat dissipation through the condenser and the heat recovery device, cold water flows through the second water pipeline connected with the condenser to absorb the heat of a part of refrigerant, and cold water flows through the third water pipeline connected with the heat recovery device to absorb a part of heat;
the operating frequency of the first water pump 10 controls the flux of hot water in the first water pipeline, that is, indirectly controls the amount of the total heat exchange amount of the evaporator, and when the total amount obtained by the evaporator is large, the amount of heat distributed to the condenser and the heat recovery device is large, that is, the amount of heat absorbed by the evaporator = the amount of heat distributed to the condenser + the amount of heat distributed to the heat recovery device.
The heat distributed to the condenser is consumed by the cooling tower, and the consumption speed is determined by the working frequency of the second water pump 20;
the heat distributed to the heat recoverer is digested by cold water circulating in a third water pipeline, warm water after heat exchange in the third water pipeline is recycled, in order to realize the control of the outlet water temperature of the third water pipeline in the using process, the main controller needs to simultaneously control the working frequencies of the first water pump 10, the second water pump 20 and the third water pump 30 and control the opening degree of the regulating valve, for example, when the outlet water of the third water pipeline needs to be heated, the third water pump 30 needs to be controlled to accelerate the working frequency, the working frequency of the second water pump 20 is reduced at the same time, the opening degree of the regulating valve is reduced, and the heat recoverer can distribute more heat to heat the cold water in the third water pipeline.
Through the analysis, the problems of high input cost and high energy consumption of the heat recovery side control system of the traditional heat recovery centrifugal unit can be solved.
Disclosure of Invention
The invention aims to provide a heat recovery side control system of a heat recovery centrifugal unit, which aims to solve the technical problem that the conventional heat recovery side control system is high in energy consumption.
In order to solve the technical problem, the invention provides a heat recovery side control system of a heat recovery centrifugal unit, which comprises a heat recovery system and a main controller, wherein the heat recovery system comprises an evaporator, a condenser, a heat recoverer, a compressor and an expansion valve;
the evaporator is connected with a first water pipeline, a first water pump is arranged on the first water pipeline, and the evaporator is suitable for exchanging heat with hot water in the first water pipeline;
the condenser is connected with a second water through pipeline, a second water pump is arranged on the second water through pipeline, the second water through pipeline is connected with the water cooling tower, and the condenser is suitable for exchanging heat with cold water in the second water through pipeline;
the heat recoverer is connected with a third water pipeline, a third water pump and a temperature sensor are arranged on the third water pipeline, the heat recoverer is suitable for exchanging heat with cold water in the third water pipeline, and the temperature sensor is suitable for detecting the outlet water temperature of the third water pipeline;
the main controller is respectively connected with the first water pump and the temperature sensor, and the main controller is suitable for controlling the working frequency of the first water pump according to the temperature of the temperature sensor.
Further, when the third water outlet pipeline needs water outlet at a preset temperature;
at the moment, the second water pump stops, the main controller detects the water outlet temperature of the third water passing pipeline through the temperature sensor and compares the measured temperature with a set value;
if the measured temperature is lower than the set temperature, the main controller increases the working frequency of the first water pump to increase the heat exchange between the hot water in the first water pipeline and the evaporator so that the evaporator obtains more heat, the heat recovery system transmits the heat to the heat recoverer to exchange heat with cold water in the third water pipeline, and the temperature of outlet water in the third water pipeline is increased to the set value;
if the measured temperature is higher than the set temperature, the main controller reduces the working frequency of the first water pump to reduce heat exchange between hot water in the first water pipeline and the evaporator so that the evaporator obtains less heat, the heat recovery system transmits the heat to the heat recovery device to supply cold water in the third water pipeline to exchange heat, and the temperature of outlet water in the third water pipeline is reduced to a set value.
The heat recovery centrifugal unit heat recovery side control system has the advantages that the outlet water temperature of the third water pipeline is controlled according to the working frequency of the first water pump controlled by the main controller, the second water pump can be prevented from being started, and the energy consumption of the system is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a heat recovery side control system of a conventional heat recovery centrifuge set;
10, a first water pump, 20, a second water pump, 30 and a third water pump;
FIG. 2 is a schematic diagram of a heat recovery side control system of the heat recovery centrifuge unit of the present invention;
the system comprises a water pump, a first water pump, a second water pump, a third water pump and a water pump, wherein the water pump comprises 1, the first water pump, 2, the second water pump, 3 and the third water pump.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2, a heat recovery side control system of a heat recovery centrifugal unit includes a heat recovery system and a main controller (PID), the heat recovery system includes an evaporator, a condenser, a heat recovery device, a compressor and an expansion valve, a heat exchange system is formed among the evaporator, the condenser, the heat recovery device, the compressor and the expansion valve, a refrigerant is heated and vaporized in the evaporator, a gaseous refrigerant is liquefied and dissipated when moving to the condenser and the heat recovery device, and then a liquid refrigerant is moved to the evaporator for vaporization.
The evaporator is connected with a first water pipeline, a first water pump 1 is arranged on the first water pipeline, and the evaporator is suitable for exchanging heat with hot water in the first water pipeline; the condenser is connected with a second water through pipeline, a second water pump 2 is arranged on the second water through pipeline, the second water through pipeline is connected with a water cooling tower, and the condenser is suitable for exchanging heat with cold water in the second water through pipeline; the heat recoverer is connected with a third water pipeline, a third water pump 3 and a temperature sensor are arranged on the third water pipeline, the heat recoverer is suitable for exchanging heat with cold water in the third water pipeline, and the temperature sensor is suitable for detecting the outlet water temperature of the third water pipeline;
the first water pump 1, the second water pump 2 and the third water pump 3 are all variable frequency water pumps.
The main controller is respectively connected with the first water pump 1 and the temperature sensor, and the main controller is suitable for controlling the working frequency of the first water pump 1 according to the temperature of the temperature sensor.
Specifically, when the third water outlet pipeline needs water at a preset temperature;
at the moment, the second water pump 2 is stopped, namely the condenser does not consume the heat of the refrigerant, the heat is completely absorbed by the heat recoverer, the main controller detects the water outlet temperature of the third water pipeline through the temperature sensor, and the detected temperature is compared with a set value;
if the measured temperature is lower than the set temperature, the main controller increases the working frequency of the first water pump 1 to increase the heat exchange between the hot water in the first water pipeline and the evaporator so that the evaporator obtains more heat, and the heat recovery system transmits the heat to the heat recoverer to exchange heat with cold water in the third water pipeline so that the temperature of outlet water in the third water pipeline is increased to a set value;
if the measured temperature is higher than the set temperature, the main controller reduces the working frequency of the first water pump 1 to reduce heat exchange between hot water in the first water pipeline and the evaporator so that the evaporator obtains less heat, the heat recovery system transmits the heat to the heat recovery device to exchange heat with cold water in the third water pipeline, and the temperature of outlet water in the third water pipeline is reduced to a set value.
The heat recovery side control system of the heat recovery centrifugal unit is the most different from the traditional control system in that the control of the outlet water temperature of the third water pipeline does not need to control the first water pump 1, the second water pump 2 and the third water pump 3 to work, and does not need to control the opening of the regulating valve in the second water pipeline, the outlet water temperature of the third water pipeline is completely controlled by the working frequency of the first water pump 1, the control is simpler, the energy consumption of the system is reduced, and the energy and the electricity are saved.
The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (2)
1. A heat recovery side control system of a heat recovery centrifugal unit is characterized by comprising a heat recovery system and a main controller, wherein the heat recovery system comprises an evaporator, a condenser, a heat recoverer, a compressor and an expansion valve;
the evaporator is connected with a first water pipeline, a first water pump is arranged on the first water pipeline, and the evaporator is suitable for exchanging heat with hot water in the first water pipeline;
the condenser is connected with a second water through pipeline, a second water pump is arranged on the second water through pipeline, the second water through pipeline is connected with the water cooling tower, and the condenser is suitable for exchanging heat with cold water in the second water through pipeline;
the heat recoverer is connected with a third water pipeline, a third water pump and a temperature sensor are arranged on the third water pipeline, the heat recoverer is suitable for exchanging heat with cold water in the third water pipeline, and the temperature sensor is suitable for detecting the outlet water temperature of the third water pipeline;
the main controller is respectively connected with the first water pump and the temperature sensor, and the main controller is suitable for controlling the working frequency of the first water pump according to the temperature of the temperature sensor.
2. The heat recovery centrifuge unit heat recovery side control system as set forth in claim 1,
when the third water outlet pipeline needs water at a preset temperature;
at the moment, the second water pump stops, the main controller detects the water outlet temperature of the third water passing pipeline through the temperature sensor and compares the measured temperature with a set value;
if the measured temperature is lower than the set temperature, the main controller increases the working frequency of the first water pump to increase the heat exchange between the hot water in the first water pipeline and the evaporator so that the evaporator obtains more heat, the heat recovery system transmits the heat to the heat recoverer to exchange heat with cold water in the third water pipeline, and the temperature of outlet water in the third water pipeline is increased to the set value;
if the measured temperature is higher than the set temperature, the main controller reduces the working frequency of the first water pump to reduce heat exchange between hot water in the first water pipeline and the evaporator so that the evaporator obtains less heat, the heat recovery system transmits the heat to the heat recovery device to supply cold water in the third water pipeline to exchange heat, and the temperature of outlet water in the third water pipeline is reduced to a set value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239021.8A CN111059738A (en) | 2019-12-06 | 2019-12-06 | Heat recovery side control system of heat recovery centrifugal unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911239021.8A CN111059738A (en) | 2019-12-06 | 2019-12-06 | Heat recovery side control system of heat recovery centrifugal unit |
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| Publication Number | Publication Date |
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| CN111059738A true CN111059738A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911239021.8A Withdrawn CN111059738A (en) | 2019-12-06 | 2019-12-06 | Heat recovery side control system of heat recovery centrifugal unit |
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| CN (1) | CN111059738A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129002A (en) * | 2020-09-28 | 2020-12-25 | 上海清美绿色食品（集团）有限公司 | Heat recovery system of water-cooling screw type water chilling unit |
| CN112944647A (en) * | 2021-02-04 | 2021-06-11 | 广州恒星制冷设备集团有限公司 | Embedded heat recovery unit |
| CN113251576A (en) * | 2021-05-18 | 2021-08-13 | 贵州汇通华城股份有限公司 | Frequency adjusting method and system for refrigerating water pump of heat recovery unit |
| CN113790487A (en) * | 2021-09-09 | 2021-12-14 | 珠海格力电器股份有限公司 | Heat recovery unit and control method thereof |
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| CN2508166Y (en) * | 2001-09-26 | 2002-08-28 | 张力 | Air-conditioning water heating equipment |
| CN1570501A (en) * | 2003-07-22 | 2005-01-26 | 台湾新晃工业股份有限公司 | Combined type heat recuperation unit for air-conditioning refrigeration systems |
| JP2015014379A (en) * | 2013-07-03 | 2015-01-22 | 株式会社日立製作所 | Air conditioning system |
| CN206449767U (en) * | 2017-01-23 | 2017-08-29 | 刘海营 | A kind of central air-conditioning energy-saving system with chilled water low-temperature protection device |
| CN107830649A (en) * | 2017-11-20 | 2018-03-23 | 美意(浙江)空调设备有限公司 | A kind of air conditioning mode intelligent conversion system |
| CN211345737U (en) * | 2019-12-06 | 2020-08-25 | 南京卓恒科技有限公司 | Heat recovery side control system of heat recovery centrifugal unit |
-
2019
- 2019-12-06 CN CN201911239021.8A patent/CN111059738A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2508166Y (en) * | 2001-09-26 | 2002-08-28 | 张力 | Air-conditioning water heating equipment |
| CN1570501A (en) * | 2003-07-22 | 2005-01-26 | 台湾新晃工业股份有限公司 | Combined type heat recuperation unit for air-conditioning refrigeration systems |
| JP2015014379A (en) * | 2013-07-03 | 2015-01-22 | 株式会社日立製作所 | Air conditioning system |
| CN206449767U (en) * | 2017-01-23 | 2017-08-29 | 刘海营 | A kind of central air-conditioning energy-saving system with chilled water low-temperature protection device |
| CN107830649A (en) * | 2017-11-20 | 2018-03-23 | 美意(浙江)空调设备有限公司 | A kind of air conditioning mode intelligent conversion system |
| CN211345737U (en) * | 2019-12-06 | 2020-08-25 | 南京卓恒科技有限公司 | Heat recovery side control system of heat recovery centrifugal unit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112129002A (en) * | 2020-09-28 | 2020-12-25 | 上海清美绿色食品（集团）有限公司 | Heat recovery system of water-cooling screw type water chilling unit |
| CN112944647A (en) * | 2021-02-04 | 2021-06-11 | 广州恒星制冷设备集团有限公司 | Embedded heat recovery unit |
| CN113251576A (en) * | 2021-05-18 | 2021-08-13 | 贵州汇通华城股份有限公司 | Frequency adjusting method and system for refrigerating water pump of heat recovery unit |
| CN113790487A (en) * | 2021-09-09 | 2021-12-14 | 珠海格力电器股份有限公司 | Heat recovery unit and control method thereof |
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Application publication date: 20200424 |