CN115218309B - Gas heat pump cold and hot water unit, control method and air conditioner - Google Patents
Gas heat pump cold and hot water unit, control method and air conditioner Download PDFInfo
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- CN115218309B CN115218309B CN202210857055.9A CN202210857055A CN115218309B CN 115218309 B CN115218309 B CN 115218309B CN 202210857055 A CN202210857055 A CN 202210857055A CN 115218309 B CN115218309 B CN 115218309B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 76
- 238000011084 recovery Methods 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 17
- 239000011737 fluorine Substances 0.000 claims abstract description 17
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 9
- 239000007789 gas Substances 0.000 description 33
- 239000003507 refrigerant Substances 0.000 description 11
- 238000004378 air conditioning Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
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
- 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
- F24F11/67—Switching between heating and cooling modes
-
- 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
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
-
- 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
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a gas heat pump cold and hot water unit, a control method and an air conditioner in the technical field of gas heat pump equipment, and aims to solve the problem that a cold and hot water unit in the prior art cannot select different heat recovery modes according to different conditions. The system comprises a working system and an engine cooling water system, wherein the working system comprises a compressor, an oil separator, a four-way valve, a water fluorine heat exchanger, a main electronic expansion valve, an air heat exchanger and a gas-liquid separator, and the engine cooling water system comprises an engine, a water pump, a first three-way valve, a second three-way valve, a first heat recoverer, a second heat recoverer and a radiator; the invention is suitable for an air conditioner, the flow direction of cooling water is controlled through the first three-way valve and the second three-way valve, and the cooling water can perform heat exchange work through the first heat recoverer, the second heat recoverer or the radiator, so that different heat recovery modes can be used under different conditions, and the problem of low heat recovery efficiency during low-temperature and high-temperature heating can be solved simultaneously.
Description
Technical Field
The invention relates to a gas heat pump water chiller-heater unit, a control method and an air conditioner, and belongs to the technical field of gas heat pump equipment.
Background
The gas heat pump is an air conditioning system for refrigerating and heating by driving a compressor to operate by using a gas engine, and the heating effect of the gas heat pump is far better than that of a common electric heat pump by recovering the waste heat of the engine, but the design position of a heat recoverer has great influence on the heat recovery effect.
It is common practice in industry to design a heat recoverer on the low pressure side of a refrigerant system to recover the engine waste heat by using the refrigerant, but the design can cause the heat exchange efficiency of the air side to be reduced or even the heat cannot be exchanged in the extremely low temperature environment, so that the gas heat pump becomes a direct-fired boiler to affect the heat dissipation efficiency, and the design of the heat recoverer on an air-conditioning water system to recover the engine waste heat by using the air-conditioning water is also carried out, but when the system load is small, the design can cause the heat recovery efficiency to be reduced due to the too high air-conditioning water temperature. The existing cold and hot water unit cannot select different heat recovery modes according to different conditions, and when the cold and hot water unit heats at low temperature and high temperature, the problem of low heat recovery efficiency is easy to occur, and the working effect of the cold and hot water unit is affected.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a gas heat pump water chiller-heater unit, a control method and an air conditioner unit, which solve the problem that the water chiller-heater unit cannot select different heat recovery modes according to different conditions.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
in a first aspect, the invention provides a gas heat pump water chiller-heater unit, which comprises a working system and an engine cooling water system;
the working system is used for executing heating or refrigerating work;
the engine cooling water system comprises a water pump and an engine for conveying power to the working system, wherein the output end of the water pump is connected with the input end of an internal pipeline of the engine, the output end of the internal pipeline of the engine is connected with the inlet of a first three-way valve, the first outlet of the first three-way valve is connected with the inlet of a second three-way valve, the second outlet of the first three-way valve is connected with a second heat recoverer, the second heat recoverer is connected with the input end of the water pump, the first outlet of the second three-way valve is connected with a radiator, the radiator is connected with the input end of the water pump, the second outlet of the second three-way valve is connected with the first heat recoverer, and a ring temperature sensor for detecting the ambient temperature is arranged on the radiator.
Further, the working system comprises a compressor, the output end of the compressor is connected with the input end of an oil separator, the output end of the oil separator is connected with the input end of the compressor, the output end of the oil separator is connected with the first end of a four-way valve, the second end of the four-way valve is connected with a water fluorine heat exchanger, the water fluorine heat exchanger is connected with a main electronic expansion valve, the main electronic expansion valve is connected with an air heat exchanger, the air heat exchanger is connected with the third end of the four-way valve, the fourth end of the four-way valve is connected with the input end of a gas-liquid separator, the output end of the gas-liquid separator is connected with the input end of the compressor, a water changing pipeline is arranged in the water fluorine heat exchanger, the output end of the water changing pipeline is connected with a second heat recoverer, the first heat recoverer is connected with the fourth end of the four-way valve, the first heat recoverer is connected with a heat recovery electronic expansion valve, and the heat recovery electronic expansion valve is connected with the water fluorine heat exchanger.
Further, the radiator is disposed side by side and in close proximity to the air heat exchanger.
Further, the engine and the compressor are driven by a belt.
Further, a fan motor for driving the fan to move is arranged on the air heat exchanger.
Further, the opening ranges of the main electronic expansion valve and the heat recovery electronic expansion valve are [60,480].
In a second aspect, the invention provides a control method of a gas heat pump water chiller-heater unit, which adopts the gas heat pump water chiller-heater unit in the first aspect, and comprises the following steps of;
responding to the working state of the system, and confirming the working mode of the current system;
acquiring the temperature of the current cooling water, comparing the temperature of the current cooling water with a preset threshold value, and confirming a cooling water cooling mode according to a comparison result and a working mode of the system;
the working state of the system comprises refrigeration and heating.
Further, responsive to the operational state of the system, confirming the current operational mode of the system includes:
if the working state of the current system is refrigeration, confirming that the working mode is a refrigeration mode;
if the current working state of the system is heating, acquiring the current ambient temperature, comparing the current ambient temperature with a preset threshold value, and confirming a mode according to a comparison result:
if TH1> X, confirming that the working mode is a normal temperature heating mode;
if TH1 is less than or equal to X, confirming that the working mode is a low-temperature heating mode;
wherein: TH1 is the current ambient temperature; x is the preset ambient temperature.
Further, obtaining the temperature of the current cooling water, comparing the temperature of the current cooling water with a preset threshold value, and confirming the cooling water cooling mode according to the comparison result and the working mode of the system comprises the following steps:
in the cooling mode:
if Y<Y min The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is closed;
if Y is greater than or equal to Y min The second outlet of the first three-way valve is closed, and the second outlet of the second three-way valve is closed;
in the normal temperature heating mode:
if Y<Y min The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is closed;
if Y min ≤Y≤Y max The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is opened;
if Y>Y max A second outlet of the first three-way valveClosing, wherein a second outlet of the second three-way valve is closed;
in the low-temperature heating mode:
if Y<Y min The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is closed;
if Y min ≤Y≤Y max The first outlet of the first three-way valve is closed;
if Y>Y max The second outlet of the first three-way valve is closed, and the second outlet of the second three-way valve is closed;
wherein: y is the current temperature of the cooling water; y is Y min The temperature of the cooling water is the preset minimum temperature; y is Y max Is the preset maximum cooling water temperature.
In a third aspect, the present invention provides an air conditioner configured with the gas heat pump water chiller-heater unit of the first aspect.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the gas heat pump cold and hot water unit, the flow direction of cooling water is controlled through the first three-way valve and the second three-way valve, and according to actual working conditions, the cooling water performs heat exchange work through the first heat recoverer, the second heat recoverer or the radiator, so that different heat recovery modes can be used under different conditions, the problem of low heat recovery efficiency during low-temperature and high-temperature heating can be solved at the same time, and the heat recovery work effect of the device is ensured;
drawings
Fig. 1 is a schematic diagram of a system structure of a gas heat pump hot and cold water unit according to an embodiment of the present invention;
fig. 2 is a schematic system structure diagram of a cooling mode of a gas heat pump cold-hot water unit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a system structure of a normal temperature heating mode of a gas heat pump hot and cold water unit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a system structure of a low-temperature heating mode of a gas heat pump hot and cold water unit according to an embodiment of the present invention.
In the figure: 1. a compressor; 2. an oil separator; 3. a four-way valve; 4. a water fluorine heat exchanger; 5. a main electronic expansion valve; 6. an air heat exchanger; 7. a gas-liquid separator; 8. a heat recovery electronic expansion valve; 9. a first heat recovery device; 10. an engine; 11. a first three-way valve; 12. a second three-way valve; 13. a heat sink; 14. a water pump; 15. a second heat recovery device; 16. a fan motor; 17. an ambient temperature sensor.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Embodiment one:
1-4, the invention provides a gas heat pump water chiller-heater unit, which comprises a working system and an engine cooling water system; the working system is used for executing heating or cooling work.
The working system comprises a compressor 1, wherein the output end of the compressor 1 is connected with the input end of an oil separator 2, the output end of the oil separator 2 is connected with the input end of the compressor 1, the output end of the oil separator 2 is connected with the first end of a four-way valve 3, the second end of the four-way valve 3 is connected with a water-fluorine heat exchanger 4, the water-fluorine heat exchanger 4 is connected with a main electronic expansion valve 5, the main electronic expansion valve 5 is connected with an air heat exchanger 6, the air heat exchanger 6 is connected with the third end of the four-way valve 3, the fourth end of the four-way valve 3 is connected with the input end of a gas-liquid separator 7, the output end of the gas-liquid separator 7 is connected with the input end of the compressor 1, and a water changing pipeline is arranged in the water-fluorine heat exchanger 4;
the engine cooling water system comprises a water pump 14 and an engine 10 for conveying power to the compressor 1, wherein the output end of the water pump 14 is connected with the input end of an internal pipeline of the engine 10, the output end of the internal pipeline of the engine 10 is connected with the inlet of a first three-way valve 11, the first outlet of the first three-way valve 11 is connected with the inlet of a second three-way valve 12, the second outlet of the first three-way valve 11 is connected with a second heat recoverer 15, the second heat recoverer 15 is connected with the input end of the water pump 14, the output end of a water changing pipeline is connected with the second heat recoverer 15, the first outlet of the second three-way valve 12 is connected with a radiator 13, the radiator 13 is connected with the input end of the water pump 14, the second outlet of the second three-way valve 12 is connected with a first heat recoverer 9, the first heat recoverer 9 is connected with the input end of the water pump 14, the first heat recoverer 9 is connected with a fourth heat recoverer 3, the first heat recoverer 9 is connected with an electronic heat recoverer 8, the electronic recoverer 8 is connected with a heat expansion loop 17 for detecting the temperature of the heat recoverer 4, and the temperature of the air is used for detecting the environment.
Specifically, the radiator 13 and the air heat exchanger 6 are arranged side by side and are closely attached to each other, so that heat exchange work between the radiator and the air heat exchanger is facilitated.
In this embodiment, the engine 10 and the compressor 1 are driven by a belt.
Specifically, the engine 10 operates the compressor 1 by a belt, so that the impact and vibration between the two are alleviated, and the noise generated in the transmission process is reduced.
The air heat exchanger 6 is provided with a fan motor 16 for driving the fan to move.
Specifically, the fan motor 16 drives the fan to rotate, so that the heat exchange efficiency of the air heat exchanger 6 is adjusted.
In this embodiment, the opening ranges of the main electronic expansion valve 5 and the heat recovery electronic expansion valve 8 are [60,480].
Embodiment two:
the embodiment provides a control method of a gas heat pump water chiller-heater unit, which adopts the gas heat pump water chiller-heater unit of the first embodiment, and comprises the following steps:
responding to the working state of the system, and confirming the working mode of the current system;
acquiring the temperature of the current cooling water, comparing the temperature of the current cooling water with a preset threshold value, and confirming a cooling water cooling mode according to a comparison result and a working mode of the system;
the working state of the system comprises refrigeration and heating.
Responsive to the operational state of the system, confirming the current operational mode of the system includes:
if the working state of the current system is refrigeration, confirming that the working mode is a refrigeration mode;
if the current working state of the system is heating, acquiring the current ambient temperature, comparing the current ambient temperature with a preset threshold value, and confirming a mode according to a comparison result:
if TH1> X, confirming that the working mode is a normal temperature heating mode;
if TH1 is less than or equal to X, confirming that the working mode is a low-temperature heating mode;
wherein: TH1 is the current ambient temperature; x is the preset ambient temperature, and optionally, X is-10 ℃.
In particular, when the mode of operation of the system is a cooling mode,
after passing through the oil separator 2, the refrigerant gas flowing out of the output end of the compressor 1 passes through the four-way valve 3, at this time, the first end of the four-way valve 3 is connected with the third end, the refrigerant gas flows out of the third end of the four-way valve 3, sequentially passes through the air heat exchanger 6 and the main electronic expansion valve 5, then enters the water-fluorine heat exchanger 4, and the processed refrigerant gas passes through the second end, the fourth end and the gas-liquid separator 7 of the four-way valve 3 and then enters the input end of the compressor 1, so that the cycle is completed.
When the mode of operation of the system is a heating mode,
after passing through the oil separator 2, the refrigerant gas flowing out from the output end of the compressor 1 passes through the four-way valve 3, at this time, the first end and the second end of the four-way valve 3 are connected, the refrigerant gas flows out from the second end of the four-way valve, passes through the water fluorine heat exchanger 4 and the main electronic expansion valve 5, then enters the air heat exchanger 6, and the processed refrigerant gas passes through the third end, the fourth end and the gas-liquid separator 7 of the four-way valve 3 and then enters the input end of the compressor 1, thus completing the cycle.
In this embodiment, in the cooling mode:
if Y<Y min The second outlet of the first three-way valve 11 is closed, the first outlet of the second three-way valve 12 is closed, and the heat recovery electronic expansion valve 8 is closed; the water pump 14 pushes the cooling water to pass through the first three-way valve 11, then the cooling water sequentially passes through the second three-way valve 12 and the first heat recoverer 9, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the cooling water does not pass through any heat exchange due to the closing of the heat recovery electronic expansion valve 8, so that the temperature of the cooling water is prevented from further reducing;
if Y is greater than or equal to Y min First isThe second outlet of the three-way valve 11 is closed and the second outlet of the second three-way valve 12 is closed; the water pump 14 pushes cooling water to sequentially pass through the first three-way valve 11, the second three-way valve 12 and the radiator 13, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the cooling water cools the cooling water through the radiator 13;
in the normal temperature heating mode:
if Y<Y min The second outlet of the first three-way valve 11 is closed, the first outlet of the second three-way valve 12 is closed, and the heat recovery electronic expansion valve 8 is closed; the water pump 14 pushes the cooling water to pass through the first three-way valve 11, then the cooling water sequentially passes through the second three-way valve 12 and the first heat recoverer 9, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the cooling water does not pass through any heat exchange due to the closing of the heat recovery electronic expansion valve 8, so that the temperature of the cooling water is prevented from continuously decreasing;
if Y min ≤Y≤Y max The second outlet of the first three-way valve 11 is closed, the first outlet of the second three-way valve 12 is closed, and the heat recovery electronic expansion valve 8 is opened; the water pump 14 pushes the cooling water to pass through the first three-way valve 11, then the cooling water sequentially passes through the second three-way valve 12 and the first heat recoverer 9, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the heat recovery electronic expansion valve 8 is opened, and in a heating mode, part of refrigerant gas passes through the first heat recoverer 9, so that the refrigerant gas and the cooling water exchange heat in the first heat recoverer 9, and the cooling water is cooled; in this embodiment, alternatively, when the temperature of TH1 is 10 ℃, the opening degrees of the main electronic expansion valve 5 and the heat recovery electronic expansion valve 8 are both 200 steps, and when TH1 is larger, the opening degree of the heat recovery electronic expansion valve 8 is smaller, and the opening degree of the main electronic expansion valve 5 is larger; when TH1 is smaller, the opening degree of the heat recovery electronic expansion valve 8 is larger, and the opening degree of the main electronic expansion valve 5 is smaller, so that the heat exchange effect of the cooling water in the first heat recoverer 9 is adjusted according to the ambient temperature.
If Y>Y max The second outlet of the first three-way valve 11 is closed and the second outlet of the second three-way valve 12 is closed; the water pump 14 pushes the cooling water to sequentially pass through the first three-way valve 11 and the second three-way valve 12 and a radiator 13, and then cooling water enters the input end of a water pump 14 to complete circulation, wherein the cooling water cools the radiator 13;
in the low-temperature heating mode:
if Y<Y min The second outlet of the first three-way valve 11 is closed, the first outlet of the second three-way valve 12 is closed, and the heat recovery electronic expansion valve 8 is closed; the water pump 14 pushes the cooling water to pass through the first three-way valve 11, then the cooling water sequentially passes through the second three-way valve 12 and the first heat recoverer 9, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the cooling water does not pass through any heat exchange due to the closing of the heat recovery electronic expansion valve 8, so that the temperature of the cooling water is prevented from continuously decreasing.
If Y min ≤Y≤Y max The first outlet of the first three-way valve 11 is closed; after the water pump 14 pushes the cooling water to pass through the first three-way valve 11, the cooling water enters the input end of the water pump 14 after passing through the second heat recoverer 15, and circulation is completed; in the low-temperature heating mode, if the cooling water at the current temperature passes through the first heat recoverer 9, the evaporating pressure and the evaporating temperature will be too high, and when the evaporating temperature of the air heat exchanger 6 is close to or even higher than the ambient temperature, the air heat exchanger 6 cannot exchange heat with air, and at this time, the heat is provided by the engine 10 entirely, so that the heating efficiency is easily reduced; the invention makes the cooling water pass through the second heat recoverer 15 to avoid influencing the heat exchange between the refrigerant gas and the air, the water outlet of the water exchanging pipeline of the water-fluorine heat exchanger 4 flows out after passing through the second heat recoverer 15, the environment temperature is lower, the water outlet temperature of the water exchanging pipeline in the water-fluorine heat exchanger 4 is lower, the cooling water and the water outlet of the water exchanging pipeline exchange heat in the second heat recoverer 15 so as to improve the heat exchange efficiency,
if Y>Y max The second outlet of the first three-way valve 11 is closed and the second outlet of the second three-way valve 12 is closed; the water pump 14 pushes cooling water to sequentially pass through the first three-way valve 11, the second three-way valve 12 and the radiator 13, and then the cooling water enters the input end of the water pump 14 to complete circulation, wherein the cooling water cools the cooling water through the radiator 13;
wherein: y is the current temperature of the cooling water; y is Y min The temperature of the cooling water is the preset minimum temperature; y is Y max For the preset maximum cooling water temperature, optionally, Y min At 60 ℃, Y max Is 90 ℃.
According to the invention, under different working modes, the flow direction of the cooling water can be controlled through the first three-way valve 11 and the second three-way valve 12 according to the temperature of the cooling water, and according to actual working conditions, the cooling water can perform heat exchange work through the first heat recoverer 9, the second heat recoverer 15 or the radiator 13, so that different heat recovery modes can be used under different conditions, the problem of low heat recovery efficiency during low-temperature and high-temperature heating can be solved, and the heat recovery working effect of the device is ensured.
Embodiment III:
the embodiment provides an air conditioner based on the first gas heat pump water chiller-heater unit and the second gas heat pump water chiller-heater unit, wherein the air conditioner is provided with the first gas heat pump water chiller-heater unit, and different heat recovery modes are used under different conditions based on the second gas heat pump water chiller-heater unit control method.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (7)
1. The control method of the gas heat pump cold and hot water unit is characterized by comprising the following steps of;
responding to the working state of the system, and confirming the working mode of the current system;
acquiring the current temperature of cooling water, comparing the current temperature of the cooling water with a preset threshold value, and confirming a cooling water cooling mode according to a comparison result and a working mode of the system;
wherein, the working state of the system comprises refrigeration and heating;
responsive to the operational state of the system, confirming the current operational mode of the system includes:
if the working state of the current system is refrigeration, confirming that the working mode is a refrigeration mode;
if the working state of the current system is heating, acquiring the current ambient temperature, comparing the current ambient temperature with the preset ambient temperature, and confirming the working mode according to the comparison result:
if TH1> X, confirming that the working mode is a normal temperature heating mode;
if TH1 is less than or equal to X, confirming that the working mode is a low-temperature heating mode;
wherein: TH1 is the current ambient temperature; x is the preset ambient temperature;
the gas heat pump cold and hot water unit comprises a working system and an engine cooling water system;
the working system is used for executing heating or refrigerating work;
the engine cooling water system comprises a water pump and an engine for conveying power to the working system, wherein the output end of the water pump is connected with the input end of an internal pipeline of the engine, the output end of the internal pipeline of the engine is connected with the inlet of a first three-way valve, the first outlet of the first three-way valve is connected with the inlet of a second three-way valve, the second outlet of the first three-way valve is connected with a second heat recoverer, the second heat recoverer is connected with the input end of the water pump, the first outlet of the second three-way valve is connected with a radiator, the radiator is connected with the input end of the water pump, the second outlet of the second three-way valve is connected with the first heat recoverer, and a ring temperature sensor for detecting the ambient temperature is arranged on the radiator;
the working system comprises a compressor, the output end of the compressor is connected with the input end of an oil separator, the output end of the oil separator is connected with the input end of the compressor, the output end of the oil separator is connected with the first end of a four-way valve, the second end of the four-way valve is connected with a water fluorine heat exchanger, the water fluorine heat exchanger is connected with a main electronic expansion valve, the main electronic expansion valve is connected with an air heat exchanger, the air heat exchanger is connected with the third end of the four-way valve, the fourth end of the four-way valve is connected with the input end of a gas-liquid separator, the output end of the gas-liquid separator is connected with the input end of the compressor, a water changing pipeline is arranged in the water fluorine heat exchanger, the output end of the water changing pipeline is connected with a second heat recoverer, the first heat recoverer is connected with the fourth end of the four-way valve, the first heat recoverer is connected with a heat recovery electronic expansion valve, and the heat recovery electronic expansion valve is connected with the water fluorine heat exchanger.
2. The method of claim 1, wherein the radiator is disposed in close proximity to the air heat exchanger side-by-side relationship.
3. The method for controlling a gas heat pump chiller-heater unit according to claim 1 wherein said engine and said compressor are driven by a belt.
4. The control method of a gas heat pump water chiller-heater unit according to claim 1 wherein said air heat exchanger is provided with a fan motor for driving a fan to move.
5. The control method of a gas heat pump chiller-heater unit according to claim 1, wherein the opening ranges of the main electronic expansion valve and the heat recovery electronic expansion valve are [60,480].
6. The method for controlling a gas heat pump water chiller-heater unit according to claim 1, wherein obtaining a current temperature of cooling water, comparing the current temperature of the cooling water with a preset threshold, and determining a cooling water cooling mode according to a comparison result and a working mode of a system comprises:
in the cooling mode:
if Y<Y min The second outlet of the first three-way valve is closedClosing the first outlet of the second three-way valve, and closing the heat recovery electronic expansion valve;
if Y is greater than or equal to Y min The second outlet of the first three-way valve is closed, and the second outlet of the second three-way valve is closed;
in the normal temperature heating mode:
if Y<Y min The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is closed;
if Y min ≤Y≤Y max The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is opened;
if Y>Y max The second outlet of the first three-way valve is closed, and the second outlet of the second three-way valve is closed;
in the low-temperature heating mode:
if Y<Y min The second outlet of the first three-way valve is closed, the first outlet of the second three-way valve is closed, and the heat recovery electronic expansion valve is closed;
if Y min ≤Y≤Y max The first outlet of the first three-way valve is closed;
if Y>Y max The second outlet of the first three-way valve is closed, and the second outlet of the second three-way valve is closed;
wherein: y is the current temperature of the cooling water; y is Y min The temperature of the cooling water is the preset minimum temperature; y is Y max Is the preset maximum cooling water temperature.
7. An air conditioner, characterized in that the air conditioner applies the control method of the gas heat pump water chiller-heater unit of any one of claims 1-6.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295922A (en) * | 2001-03-29 | 2002-10-09 | Hokkaido Gas Co Ltd | Air conditioning method, heat pump and air conditioning apparatus |
| JP2004125205A (en) * | 2002-09-30 | 2004-04-22 | Aisin Seiki Co Ltd | Waste heat recovery type heat pump |
| JP2009210159A (en) * | 2008-02-29 | 2009-09-17 | Mitsubishi Heavy Ind Ltd | Control method of gas heat pump type air conditioner, and gas heat pump type air conditioner |
| CN209944746U (en) * | 2019-03-26 | 2020-01-14 | 中南建筑设计院股份有限公司 | Air energy and gas heat pump water heater unit |
| CN112815569A (en) * | 2021-01-14 | 2021-05-18 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump cold and hot water unit air conditioning system and control method thereof |
| CN113686022A (en) * | 2021-08-24 | 2021-11-23 | 南京天加环境科技有限公司 | Improved gas heat pump water chiller-heater unit |
| CN114440489A (en) * | 2020-12-28 | 2022-05-06 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump multi-connected unit air conditioning system and control method thereof |
| CN114543387A (en) * | 2022-02-25 | 2022-05-27 | 南京天加环境科技有限公司 | Gas heat pump system capable of improving defrosting efficiency and control method thereof |
-
2022
- 2022-07-20 CN CN202210857055.9A patent/CN115218309B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002295922A (en) * | 2001-03-29 | 2002-10-09 | Hokkaido Gas Co Ltd | Air conditioning method, heat pump and air conditioning apparatus |
| JP2004125205A (en) * | 2002-09-30 | 2004-04-22 | Aisin Seiki Co Ltd | Waste heat recovery type heat pump |
| JP2009210159A (en) * | 2008-02-29 | 2009-09-17 | Mitsubishi Heavy Ind Ltd | Control method of gas heat pump type air conditioner, and gas heat pump type air conditioner |
| CN209944746U (en) * | 2019-03-26 | 2020-01-14 | 中南建筑设计院股份有限公司 | Air energy and gas heat pump water heater unit |
| CN114440489A (en) * | 2020-12-28 | 2022-05-06 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump multi-connected unit air conditioning system and control method thereof |
| CN112815569A (en) * | 2021-01-14 | 2021-05-18 | 中科广能能源研究院(重庆)有限公司 | Gas heat pump cold and hot water unit air conditioning system and control method thereof |
| CN113686022A (en) * | 2021-08-24 | 2021-11-23 | 南京天加环境科技有限公司 | Improved gas heat pump water chiller-heater unit |
| CN114543387A (en) * | 2022-02-25 | 2022-05-27 | 南京天加环境科技有限公司 | Gas heat pump system capable of improving defrosting efficiency and control method thereof |
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| CN115218309A (en) | 2022-10-21 |
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