CN113587280A - Evaporation condensation type water chilling unit with partial heat recoverer and control technology - Google Patents
Evaporation condensation type water chilling unit with partial heat recoverer and control technology Download PDFInfo
- Publication number
- CN113587280A CN113587280A CN202110721881.6A CN202110721881A CN113587280A CN 113587280 A CN113587280 A CN 113587280A CN 202110721881 A CN202110721881 A CN 202110721881A CN 113587280 A CN113587280 A CN 113587280A
- Authority
- CN
- China
- Prior art keywords
- hot water
- heat recovery
- water flow
- partial heat
- compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- 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
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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
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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an evaporation condensing water chilling unit with a partial heat recoverer and a control technology, wherein the unit has refrigeration and partial heat recovery functions, the opening degree between related interfaces of a hot water flow regulating valve arranged between a water inlet pipe and a water outlet pipe of the partial heat recoverer is controlled by acquiring the temperature of inlet and outlet water of hot water, the outdoor air temperature and the exhaust pressure of a compressor through a microcomputer controller so as to regulate the hot water flow entering the partial heat recoverer, and the operating parameters such as the exhaust pressure of the compressor, the exhaust temperature, the liquid phase proportion in refrigerant at the outlet of the partial heat recoverer and the heat recovery quantity of the partial heat recoverer are controlled within a reasonable range, so that the stability and the reliability of the unit are improved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to an evaporative condensing water chilling unit with a partial heat recoverer and a control technology thereof.
Background
With the increasing development of economy and the continuous improvement of the living standard of human beings, a large-scale water chilling unit is used as a cold source for cooling a centralized air conditioner or a technological process, and is more and more widely applied. The evaporating cooling unit has obvious energy saving effect compared with the conventional air cooling and water cooling unit because the refrigerant of the condenser directly exchanges heat with the air and cooling water outside the pipe. In recent years, evaporative condensing screw water chilling units using evaporative condensers are gradually known and popular in the market, and are increasingly widely applied to comfortable central air conditioners and industrial production processes. In public building projects such as hospitals, schools, hotels and the like and industrial production departments such as chemical engineering electronics, biological medicine and the like, not only is chilled water required to cool and dehumidify air in an air conditioning area, but also process hot water is required to heat or dehumidify the air and then reheat the air, or sanitary hot water is required to meet the requirement of living comfort. A boiler or an electric water heater is usually adopted to meet the requirement of hot water, the energy efficiency is low, and the environmental pollution is serious.
The evaporative condensation type water chilling unit can realize the recovery of partial or all condensation waste heat by additionally arranging the heat recoverer, realizes one-way energy consumption and two-way output, and can prepare process or sanitary hot water freely while refrigerating so as to realize the maximum utilization of energy. However, in practical application, the conditions of too low discharge pressure and discharge temperature of the compressor, oil leakage of the compressor, slow loading speed, too low suction pressure of the unit, and the like are easy to occur. Meanwhile, the problem that the refrigerant quantity in an evaporative condenser and a high-pressure pipeline is insufficient due to the high liquid phase proportion of the refrigerant at the outlet of the heat recovery device can also occur, so that the refrigerant at the inlet of the throttling device generates gas, the reduction of suction pressure is aggravated, and even the low-pressure switch is tripped is caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention is additionally provided with a microcomputer controller for collecting the temperature of inlet and outlet water of hot water, the outdoor air temperature and the exhaust pressure to control the opening of a hot water flow regulating valve arranged between the inlet pipe and the outlet pipe of a part of heat recoverer of the unit, and controls the operation parameters such as the suction pressure, the exhaust temperature, the liquid phase proportion in refrigerant at the outlet of the part of heat recoverer and the like and the heat recovery quantity within a reasonable range by regulating the hot water flow entering the part of heat recoverer, thereby improving the stability and the reliability of the unit.
In a first aspect of the invention, the invention provides an evaporation condensation type water chilling unit with a partial heat recoverer, which comprises an evaporator, a compressor, an evaporation type condenser and a throttling device, wherein all the parts are sequentially connected through a pipeline to form a refrigerant circulation loop; the unit also comprises a microcomputer controller, wherein the microcomputer controller collects the temperature of inlet and outlet water of a hot water pipe, the outdoor air temperature and the exhaust pressure of the compressor, and regulates the flow of hot water entering part of the heat recoverers by controlling a hot water flow regulating valve, so that the operation parameters including the exhaust pressure and the exhaust temperature of the compressor, the liquid phase proportion of refrigerant at the outlet of part of the heat recoverers and the heat recovery amount of part of the heat recoverers are controlled within a reasonable range; the unit has refrigeration and heat recovery functions, and can generate process or sanitary hot water by recovering part of condensed waste heat while providing chilled water for air conditioning or process cooling.
In addition, according to the above embodiment of the present invention, the following additional technical features may be provided:
in some embodiments of the present invention, specifically, the hot water flow regulating valve disposed between the hot water inlet pipe and the hot water outlet pipe is a first hot water flow regulating valve, a port a of the first hot water flow regulating valve is connected to the hot water inlet pipe, a port b of the first hot water flow regulating valve is connected to a portion of the heat recovery device, and a port c of the first hot water flow regulating valve is connected to the hot water outlet pipe.
Specifically, the hot water flow control valve that is equipped with between hot water inlet tube and the outlet pipe comprises two valves of second hot water flow control valve, third hot water flow control valve, and second hot water flow control valve installs on the hot water inlet tube, and third hot water flow control valve one end is connected with hot water inlet tube and second hot water flow control valve entry, and the other end is connected with the hot water outlet pipe.
Specifically, a liquid storage device and a filter are additionally arranged between the evaporative condenser and the throttling device.
Specifically, the heat exchange area of the part of the heat recoverers is determined according to the required heat recovery amount, the structure form of the part of the heat recoverers can be a shell-and-tube type or a plate-and-tube type or other forms, and when the part of the heat recoverers adopt shell-and-tube type heat exchangers, the part of the heat recoverers can adopt an in-tube condensation form or an out-of-tube condensation form.
Specifically, the first hot water flow regulating valve is an electric three-way valve and can also be other types of valves, and the compressor, the evaporative condenser, the throttling device, the evaporator, the partial heat recoverer, the first hot water flow regulating valve and the microcomputer controller can be arranged in the same frame structure to form an integral unit or can be arranged in different frame structures to form a split unit.
Specifically, the compressor, the evaporative condenser, the throttling device, the evaporator, the partial heat recoverer, the microcomputer controller, the second hot water flow regulating valve and the third hot water flow regulating valve can be arranged in the same frame structure to form an integral unit, and can also be arranged in different frame structures to form a split unit.
Specifically, the control technology for operating the heat recovery evaporation condensation type water chilling unit detects the temperature of inlet and outlet water of hot water, the outdoor air temperature and the exhaust pressure of a compressor through a microcomputer controller, when the temperature of the outlet water of the hot water and the exhaust pressure of the compressor are lower, the microcomputer controller controls to reduce the opening degree between a connector a and a connector b of a first hot water flow regulating valve and increase the opening degree between a connector a and a connector c of a first flow regulating valve 8, thereby reducing the hot water flow entering a part of heat recoverers, directly bypassing most of the hot water flow to a water outlet pipe, further reducing the heat exchange quantity and the cooling effect of the part of heat recoverers, improving the exhaust pressure of the compressor, simultaneously reducing the liquid phase proportion of refrigerant at the outlets of the part of the heat recoverers, and controlling the exhaust pressure, the exhaust temperature of the compressor, the liquid phase proportion of refrigerant at the outlets of the part of the heat recoverers and the heat recovery quantity of the part of the heat recoverers within a reasonable range, thereby improving the stability and reliability of the unit.
Specifically, the control technology of the heat recovery evaporation condensation type water chilling unit is operated, the temperature of inlet and outlet water of hot water, the outdoor air temperature and the exhaust pressure of a compressor are detected by a microcomputer controller, when the temperature of the outlet water of the hot water and the exhaust pressure of the compressor are lower, the microcomputer controller controls to reduce the opening degree of a second hot water flow regulating valve and increase the opening degree of a third hot water flow regulating valve so as to reduce the hot water flow entering a part of heat recoverers, directly bypass most of the hot water flow to a water outlet pipe, further reduce the heat exchange quantity and the cooling effect of the part of the heat recoverers, improve the exhaust pressure of the compressor, and simultaneously reduce the liquid phase proportion of refrigerant at the outlet of the part of the heat recoverers, so that the exhaust pressure and the exhaust temperature of the compressor, the liquid phase proportion of refrigerant at the outlet of the part of the heat recoverers and the partial heat recovery quantity of the heat are controlled within a reasonable range, thereby improving the stability and reliability of the unit.
The evaporative condensation type water chilling unit with the partial heat recoverer has the refrigeration and heat recovery functions, and can generate process or sanitary hot water by recovering condensation waste heat while providing chilled water for air conditioning or process cooling. Most importantly, a microcomputer controller is additionally arranged to collect the temperature of inlet and outlet water of hot water, the outdoor air temperature and the exhaust pressure to control the opening of a hot water flow regulating valve arranged between a water inlet pipe and a water outlet pipe of a heat recovery device of a unit part, so that the flow of the hot water entering the heat recovery device of the unit part is regulated. Especially when the hot water temperature is low, especially when the compressor is not fully loaded, the conditions that the heat exchange temperature difference between the high-temperature high-pressure gas refrigerant discharged by the compressor and the hot water is too large and the cooling effect is too good can be avoided, so that the condensation load, the condensation temperature, the compressor discharge pressure and the exhaust temperature of the evaporative condenser can be controlled in a proper range, and the oil leakage of the compressor, the slow loading speed and the too low suction pressure of a unit are avoided. Meanwhile, the liquid phase proportion of the refrigerant at the outlet of the heat recovery device can be moderate, the shortage of the refrigerant quantity in an evaporative condenser and a high-pressure pipeline can be prevented, the refrigerant at the inlet of the throttling device can be prevented from generating gas, the reduction of suction pressure and even the tripping of a low-pressure switch can be avoided, and finally the unit has higher stability and reliability.
Drawings
Fig. 1 is a schematic flow chart of a first embodiment of an evaporative condensing water chiller with a partial heat recoverer according to the present invention.
Fig. 2 is a schematic flow chart of a second embodiment of an evaporative condensing water chiller with a partial heat recovery unit according to the present invention.
Wherein, 1-compressor; 2-partial heat recovery; 3-an evaporative condenser; 4-a liquid reservoir; 5-a filter; 6-a throttling device; 7-an evaporator; 8-a first hot water flow regulating valve; 9-a microcomputer controller; 10-a second hot water flow regulating valve; 11-a third hot water flow regulating valve; 21-hot water inlet pipe; 22-water outlet pipe.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "connected," "communicating," and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanical connection and electrical connection; may be directly connected, or indirectly connected through an intermediate; there may be communication within two elements or an interaction of two elements unless otherwise expressly limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, it is understood that the description of the terms "one embodiment" or "a particular embodiment," etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
As shown in fig. 1-2, the evaporative condensing water chilling unit with a partial heat recoverer and the control technology thereof of the present invention comprises an evaporator 7, a compressor 1, a partial heat recoverer 2, an evaporative condenser 3 and a throttling device 6, wherein the parts are sequentially connected through a pipeline to form a loop, the throttling device 6 is arranged between the evaporative condenser 3 and the evaporator 7, and the partial heat recoverer 2 is arranged between the compressor 1 and the evaporative condenser 3. The partial heat recoverer 2 is provided with a hot water inlet pipe 21 and a water outlet pipe 22, a first hot water flow regulating valve 8 is arranged between the hot water inlet pipe 21 and the water outlet pipe 22, an interface a of the first hot water flow regulating valve 8 is connected with the hot water inlet pipe, an interface b is connected with the partial heat recoverer 2, and an interface c is connected with the hot water outlet pipe. The unit also comprises a microcomputer controller 9, and the microcomputer controller 9 controls the first hot water flow regulating valve 8 to regulate the water flow in and out of part of the heat recoverer 2. The refrigerant passage and the hot water inlet and outlet passage of the partial heat recoverer 2 can exchange heat with each other, and heat exchange is performed when hot water and refrigerant simultaneously flow through the partial heat recoverer 2.
In an embodiment of the present invention, a liquid reservoir 4 and a filter 5 may be sequentially added between the evaporative condenser 3 and the throttling device 6. The heat exchange area of the partial heat recoverer 2 can be determined according to the required heat recovery amount. The structural form of the partial heat recovery unit 2 can be a shell-and-tube type, a plate-and-tube type, a sleeve type or other forms. When the shell-and-tube heat exchanger is adopted as part of the heat recoverer 2, the condensation mode in the tube can be adopted, and the condensation mode outside the tube can also be adopted. The first hot water flow regulating valve 8 can adopt an electric three-way valve and also can adopt other valves.
In a specific embodiment of the present invention, the compressor 1, the evaporative condenser 3, the liquid reservoir 4, the filter 5, the throttling device 6, the evaporator 7, the partial heat recovery device 2, the first hot water flow regulating valve 8, and the microcomputer controller 9 may be installed in the same frame structure to form an integral unit, or may be installed in different frame structures to form a separate unit.
The invention relates to an evaporation-condensation type water chilling unit with a partial heat recoverer, which has the following working control principle in detail: the low-temperature low-pressure gas refrigerant flowing from the evaporator 7 is sucked by the compressor 1, and the low-pressure gas is compressed to work and then changed into high-temperature high-pressure gas refrigerant, and then enters the partial heat recoverer 2 through the exhaust pipe. The opening degree between the related interfaces of the first hot water flow regulating valve 8 is controlled according to the temperature of the inlet and outlet water of the hot water, the outdoor air temperature and the exhaust pressure of the compressor, which are collected by the microcomputer controller 9, so as to control the flowing state of the hot water, the high-temperature high-pressure gas refrigerant and the hot water with relatively low temperature exchange heat in the partial heat recoverer 2, and partial condensation heat is discharged to the hot water to be heated and then enters the evaporative condenser 3. The high-pressure gas-liquid mixed refrigerant is further condensed in the evaporative condenser 3, circulating water in the evaporative condenser 3 is uniformly covered on the surface of the heat exchanger, and latent heat evaporated by a water film is utilized to directly condense refrigerant vapor and condense the refrigerant vapor into high-pressure liquid. The high-pressure liquid refrigerant enters the throttling device 6 again, is throttled and depressurized into a low-temperature low-pressure gas-liquid mixture, then enters the evaporator 7 to exchange heat with the relatively high-temperature chilled water, is cooled to absorb the heat, is evaporated into low-temperature low-pressure gas, and is finally sucked into the compressor 1, so that the cycle is repeated.
Specifically, the unit of the invention can operate the microcomputer controller 9 to detect the temperature of the inlet and outlet water of the hot water, the outdoor air temperature and the exhaust pressure of the compressor, when the temperature of the outlet and the exhaust pressure of the compressor are lower, the microcomputer controller 9 automatically reduces the opening degree between the interface a and the interface b of the first hot water flow regulating valve 8, increases the opening degree between the interface a and the interface c to reduce the flow rate of the hot water entering the partial heat recoverer 2, and directly bypasses most of the flow rate of the hot water to the outlet pipe, thereby reducing the heat exchange quantity and the cooling effect of the heat recoverer 2, improving the temperature and the exhaust pressure of the outlet and the liquid phase proportion of the refrigerant at the outlet of the partial heat recoverer 2.
The evaporative condensation type water chilling unit with the partial heat recoverer has refrigeration and heat recovery functions, and can generate process or sanitary hot water by recovering partial condensation waste heat while providing chilled water for air conditioning or process cooling. Meanwhile, through the first hot water flow regulating valve 8 arranged between the water inlet pipe 21 and the water outlet pipe 22 of the unit partial heat recoverer 2, the opening degree between the related interfaces of the first hot water flow regulating valve 8 is controlled according to the inlet and outlet water temperature of hot water, the outdoor air temperature and the compressor exhaust pressure collected by the microcomputer controller 9 during the unit operation so as to regulate the hot water flow entering the partial heat recoverer, thereby controlling the compressor exhaust pressure, the exhaust temperature, the refrigerant liquid phase proportion at the outlet of the partial heat recoverer 2 and other operation parameters and the heat recovery amount within a reasonable range, thereby avoiding that when the hot water inlet temperature is low, the high-temperature high-pressure gas refrigerant is excessively cooled in the partial heat recoverer 2 to cause the compressor exhaust pressure and exhaust temperature to be too low, which results in the compressor oil leakage, slow loading speed, too low unit suction pressure, insufficient refrigerant amount in an evaporative condenser and a high-pressure pipeline, The phenomenon that the suction pressure is too low, the low-voltage switch is tripped off and the like.
The other evaporative condensing water chilling unit with a heat recovery device of the present invention has basically the same components and working procedures as the refrigeration system of the above embodiment, in this embodiment, the first hot water flow regulating valve 8 for regulating the hot water flow is changed to be composed of two valves, namely, a second hot water flow regulating valve 10 and a third hot water flow regulating valve 11, the second hot water flow regulating valve 10 is installed on the hot water inlet pipe 21, one end of the third hot water flow regulating valve 11 is connected with the hot water inlet pipe 21 and the second hot water flow regulating valve 10, and the other end is connected with the hot water outlet pipe 22. The microcomputer controller 9 controls the second hot water flow regulating valve 10 and the third hot water flow regulating valve 11 to regulate the water flow of the inlet and outlet of part of the heat recovery device 2. When the unit is running, the microcomputer controller 9 detects the temperature of hot water inlet and outlet, the outdoor air temperature and the exhaust pressure of the compressor, when the temperature of hot water outlet and the exhaust pressure are lower, the microcomputer controller 9 automatically reduces the opening degree of the second hot water flow regulating valve 10, increases the opening degree of the third hot water flow regulating valve 11 to reduce the hot water flow entering part of the heat recoverer 2, and directly bypasses most of the hot water flow to the water outlet pipe, thereby reducing the heat exchange quantity and the cooling effect of the heat recoverer 2, improving the temperature and the exhaust pressure of the hot water outlet of the heat recoverer 2, simultaneously reducing the liquid phase proportion of the refrigerant at the outlet of part of the heat recoverer 2, and avoiding the oil leakage of the compressor, and the oil leakage of the compressor caused by the over-cooling of the high-temperature high-pressure gas refrigerant in part of the heat recoverer 2 when the temperature of hot water is lower, The loading speed is slow, the suction pressure is too low, the low-voltage switch trips and the like, so that the stability and the reliability of the unit are improved.
While embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be taken as limiting the invention. Various changes and modifications may be made to the invention without departing from the spirit and scope of the invention, and such changes and modifications are intended to be within the scope of the invention as claimed.
Claims (10)
1. The utility model provides an evaporation condensing cooling water set of taking partial heat recovery device, includes evaporimeter, compressor, evaporative condenser, throttling arrangement, and each part connects gradually through the pipeline and forms refrigerant circulation circuit, its characterized in that: a part of heat recoverer is arranged between the compressor and the evaporative condenser, the part of heat recoverer is respectively communicated with a hot water inlet pipe and a water outlet pipe, and a hot water flow regulating valve capable of regulating the flow of hot water is arranged between the hot water inlet pipe and the water outlet pipe; the unit also comprises a microcomputer controller, wherein the microcomputer controller collects the temperature of inlet and outlet water of a hot water pipe, the outdoor air temperature and the exhaust pressure of the compressor, and regulates the flow of hot water entering part of the heat recoverers by controlling a hot water flow regulating valve, so that the operation parameters including the exhaust pressure and the exhaust temperature of the compressor, the liquid phase proportion of refrigerant at the outlet of part of the heat recoverers and the heat recovery amount of part of the heat recoverers are controlled within a reasonable range; the unit has refrigeration and heat recovery functions, and can generate process or sanitary hot water by recovering part of condensed waste heat while providing chilled water for air conditioning or process cooling.
2. The evaporative condensing chiller with partial heat recovery as set forth in claim 1, wherein: the hot water flow regulating valve arranged between the hot water inlet pipe and the water outlet pipe is a first hot water flow regulating valve, the interface a of the first hot water flow regulating valve is connected with the hot water inlet pipe, the interface b is connected with a part of the heat recoverer, and the interface c is connected with the hot water outlet pipe.
3. The evaporative condensing chiller with partial heat recovery as set forth in claim 1, wherein: the hot water flow regulating valve arranged between the hot water inlet pipe and the water outlet pipe is composed of a second hot water flow regulating valve and a third hot water flow regulating valve, the second hot water flow regulating valve is installed on the hot water inlet pipe, one end of the third hot water flow regulating valve is connected with the hot water inlet pipe and the inlet of the second hot water flow regulating valve, and the other end of the third hot water flow regulating valve is connected with the hot water outlet pipe.
4. The evaporative condensing chiller with partial heat recovery as set forth in claim 1, wherein: and a liquid storage device and a filter are additionally arranged between the evaporative condenser and the throttling device.
5. The evaporative condensing chiller with partial heat recovery as set forth in claim 1, wherein: the heat exchange area of part of the heat recoverer is determined according to the required heat recovery amount, and the part of the heat recoverer can be a shell-and-tube type or a plate-and-tube type, and also can be a sleeve type or other types.
6. The evaporative condensing chiller with partial heat recovery as set forth in claim 5, wherein: when part of the heat recoverer adopts a shell-and-tube heat exchanger, an in-tube condensation mode can be adopted, and an out-tube condensation mode can also be adopted.
7. The evaporative condensing chiller with partial heat recovery as set forth in claim 2, wherein: the first hot water flow regulating valve is an electric three-way valve and can also be other types of valves, and the compressor, the evaporative condenser, the throttling device, the evaporator, the partial heat recoverer, the first hot water flow regulating valve and the microcomputer controller can be arranged in the same frame structure to form an integral unit and can also be arranged in different frame structures to form a split unit.
8. The evaporative condensing chiller with partial heat recovery as set forth in claim 1, wherein: the compressor, the evaporative condenser, the throttling device, the evaporator, the partial heat recoverer, the microcomputer controller, the second hot water flow regulating valve and the third hot water flow regulating valve can be arranged in the same frame structure to form an integral unit, and can also be arranged in different frame structures to form a split unit.
9. The control technique for operating the evaporative condensing chiller with a partial heat recovery unit as set forth in claim 2, wherein the temperature of the inlet and outlet water of the hot water, the outdoor temperature and the discharge pressure of the compressor are detected by the microcomputer controller, and when the temperature of the outlet and outlet water of the hot water and the discharge pressure of the compressor are low, the microcomputer controller controls the opening between the interface a and the interface b of the first hot water flow control valve and the opening between the interface a and the interface c of the first flow control valve 8 to decrease the flow rate of the hot water entering the partial heat recovery unit, so that most of the flow rate of the hot water is directly bypassed to the outlet pipe, thereby decreasing the heat exchange amount and cooling effect of the partial heat recovery unit, increasing the discharge pressure of the compressor, and simultaneously decreasing the liquid phase ratio of the refrigerant at the outlet of the partial heat recovery unit, thereby controlling the discharge pressure of the compressor, the discharge temperature of the refrigerant, the liquid phase ratio of the refrigerant at the outlet of the partial heat recovery unit and the heat recovery unit in a reasonable range, thereby improving the stability and reliability of the unit.
10. The control technique for operating the evaporative condensing chiller with a partial heat recovery unit according to claim 3, wherein the microcomputer controller detects the temperature of the inlet and outlet water of the hot water, the outdoor air temperature and the exhaust pressure of the compressor, when the temperature of the outlet and the exhaust pressure of the compressor are lower, the microcomputer controller controls the opening of the second hot water flow control valve to be decreased and the opening of the third hot water flow control valve to be increased, thereby decreasing the hot water flow entering the partial heat recovery unit, bypassing most of the hot water flow directly to the outlet pipe, further decreasing the heat exchange amount and cooling effect of the partial heat recovery unit, increasing the exhaust pressure of the compressor, and simultaneously decreasing the liquid phase ratio of the refrigerant at the outlet of the partial heat recovery unit, thereby controlling the exhaust pressure and temperature of the compressor, the liquid phase ratio of the refrigerant at the outlet of the partial heat recovery unit and the heat recovery amount of the partial heat recovery unit within a reasonable range, thereby improving the stability and reliability of the unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110721881.6A CN113587280A (en) | 2021-06-29 | 2021-06-29 | Evaporation condensation type water chilling unit with partial heat recoverer and control technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110721881.6A CN113587280A (en) | 2021-06-29 | 2021-06-29 | Evaporation condensation type water chilling unit with partial heat recoverer and control technology |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113587280A true CN113587280A (en) | 2021-11-02 |
Family
ID=78244975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110721881.6A Pending CN113587280A (en) | 2021-06-29 | 2021-06-29 | Evaporation condensation type water chilling unit with partial heat recoverer and control technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113587280A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137513A (en) * | 1997-07-15 | 1999-02-12 | Sanyo Electric Co Ltd | Air conditioner |
| US6357245B1 (en) * | 2001-05-01 | 2002-03-19 | Cohand Technology Co., Ltd. | Apparatus for making hot-water by air conditioner/heater |
| WO2009071074A2 (en) * | 2007-12-07 | 2009-06-11 | Hombuecher Heinz-Dieter | Device for increasing the heating and cooling output of a heat pump in heat reclamation in air conditioning units |
| CN102519173A (en) * | 2011-12-31 | 2012-06-27 | 广东欧科空调制冷有限公司 | Air conditioning system capable of partial heat recovering and total heat recovering |
| CN102840714A (en) * | 2012-08-27 | 2012-12-26 | 特灵空调系统(中国)有限公司 | Heat pump system with hot water function and control method |
| CN202675511U (en) * | 2012-07-11 | 2013-01-16 | 山东御嘉富尔达空调设备有限公司 | Heat pump air conditioner with heat recovery function |
| CN104279791A (en) * | 2014-10-16 | 2015-01-14 | 珠海格力电器股份有限公司 | air conditioning system and control method for air conditioning system |
| CN107014015A (en) * | 2017-05-02 | 2017-08-04 | 浙江国祥股份有限公司 | Recovery type heat evaporating condensation type handpiece Water Chilling Units |
| CN110749018A (en) * | 2019-09-12 | 2020-02-04 | 湖南工程学院 | A single-machine two-stage compression intermediate extraction heat recovery fresh air treatment device |
| CN216048446U (en) * | 2021-06-29 | 2022-03-15 | 浙江国祥股份有限公司 | Evaporation condensation type water chilling unit with partial heat recoverer |
-
2021
- 2021-06-29 CN CN202110721881.6A patent/CN113587280A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1137513A (en) * | 1997-07-15 | 1999-02-12 | Sanyo Electric Co Ltd | Air conditioner |
| US6357245B1 (en) * | 2001-05-01 | 2002-03-19 | Cohand Technology Co., Ltd. | Apparatus for making hot-water by air conditioner/heater |
| WO2009071074A2 (en) * | 2007-12-07 | 2009-06-11 | Hombuecher Heinz-Dieter | Device for increasing the heating and cooling output of a heat pump in heat reclamation in air conditioning units |
| CN102519173A (en) * | 2011-12-31 | 2012-06-27 | 广东欧科空调制冷有限公司 | Air conditioning system capable of partial heat recovering and total heat recovering |
| CN202675511U (en) * | 2012-07-11 | 2013-01-16 | 山东御嘉富尔达空调设备有限公司 | Heat pump air conditioner with heat recovery function |
| CN102840714A (en) * | 2012-08-27 | 2012-12-26 | 特灵空调系统(中国)有限公司 | Heat pump system with hot water function and control method |
| CN104279791A (en) * | 2014-10-16 | 2015-01-14 | 珠海格力电器股份有限公司 | air conditioning system and control method for air conditioning system |
| CN107014015A (en) * | 2017-05-02 | 2017-08-04 | 浙江国祥股份有限公司 | Recovery type heat evaporating condensation type handpiece Water Chilling Units |
| CN110749018A (en) * | 2019-09-12 | 2020-02-04 | 湖南工程学院 | A single-machine two-stage compression intermediate extraction heat recovery fresh air treatment device |
| CN216048446U (en) * | 2021-06-29 | 2022-03-15 | 浙江国祥股份有限公司 | Evaporation condensation type water chilling unit with partial heat recoverer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN216048446U (en) | Evaporation condensation type water chilling unit with partial heat recoverer | |
| CN100538208C (en) | A kind of double-temperature refrigerator water/cold wind unit | |
| CN103940145A (en) | Multifunctional combined supply type integrated air conditioner unit for data rooms | |
| CN206683105U (en) | A kind of compound computer-room air conditioning system of multiple | |
| CN103615836B (en) | A kind of screw total heat recovery air-cooled heat-pump air-conditioner group | |
| CN109556215A (en) | A kind of connected radiation central air conditioner water heater group | |
| CN113654132B (en) | Heat pump unit | |
| CN209558605U (en) | A kind of humiture independence control air conditioner system fresh air dehumidifying system | |
| CN209068588U (en) | Data center waste heat recovery system | |
| CN113446756A (en) | Four-pipe air source heat pump unit with variable-speed compressor | |
| CN202066139U (en) | Dual temperature heat pipe constant temperature and humidity air conditioning unit | |
| CN205690623U (en) | A kind of air conditioner condensate water recycling heat exchanger | |
| CN102679484B (en) | Water loop heat pump air conditioning system with geothermal energy as single auxiliary cold and heat source | |
| CN110749018A (en) | A single-machine two-stage compression intermediate extraction heat recovery fresh air treatment device | |
| CN102345920A (en) | Split heat recycling evaporating and condensing fresh air conditioner | |
| CN201748574U (en) | Double-circulating type machine room energy saving air conditioner | |
| CN101799223A (en) | Entire-year three-use air source heat pump unit and method for operating same | |
| CN1210534C (en) | Split heat pump air conditioner system | |
| CN209763409U (en) | Fresh air fan capable of adjusting temperature in winter and summer | |
| CN101109588A (en) | One-master-driving-two air conditioner refrigerating system with constant frequency | |
| CN203595316U (en) | Screw rod type total heat recovery air-cooled heat pump air conditioning unit | |
| CN101949617B (en) | High-efficiency air source heat pump device and method for preparing water and air simultaneously | |
| CN113587280A (en) | Evaporation condensation type water chilling unit with partial heat recoverer and control technology | |
| CN213873001U (en) | Energy-saving humidifier and air conditioning unit | |
| CN211822929U (en) | Heat pump set |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |