CN112050329A - Multi-split system with multi-heat source switching function - Google Patents
Multi-split system with multi-heat source switching function Download PDFInfo
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- CN112050329A CN112050329A CN202010978778.5A CN202010978778A CN112050329A CN 112050329 A CN112050329 A CN 112050329A CN 202010978778 A CN202010978778 A CN 202010978778A CN 112050329 A CN112050329 A CN 112050329A
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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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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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
- 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
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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
- 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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Thermal Sciences (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Sustainable Energy (AREA)
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- Analytical Chemistry (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a multi-split system with multi-heat source switching, which comprises a multi-split indoor unit, an outdoor unit and a hydraulic module, wherein the multi-split indoor unit comprises a compressor, an outdoor heat exchanger, a first four-way valve, a second four-way valve and a third four-way valve; the system also comprises an environment temperature unit for detecting the outdoor environment temperature in real time, so that the hydraulic module is correspondingly selected to be started or stopped as a heat source based on the detected outdoor environment temperature in a low-temperature environment, and the power-on or power-off actions of the first four-way valve, the second four-way valve and the third four-way valve are correspondingly controlled.
Description
Technical Field
The invention relates to the technical field of multi-split systems, in particular to a multi-split system with multi-heat source switching.
Background
In the existing multi-split air-conditioning system, a multi-split air-conditioning system is generally formed by a multi-split outdoor unit and a multi-split indoor unit, when the indoor unit operates in a heating mode, hot air is provided indoors, an outdoor unit heat exchanger evaporates and absorbs heat to air, a fin heat exchanger of the outdoor unit is easy to frost at a low temperature, the heating capacity of the indoor unit is reduced after frost, periodical frost removal is needed, heating cannot be continuously provided for the indoor unit during defrosting of the fin heat exchanger of the outdoor unit, the temperature of an indoor environment is reduced, and the comfort level is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a multi-split air-conditioning system with multi-heat-source switching, which solves the problem that an outdoor air heat source or a ground-edge water heat source on the ground source side is selected as required when an indoor unit heats in a low-temperature environment.
In order to achieve the purpose, the multi-split system with multi-heat source switching comprises a multi-split indoor unit, an outdoor unit and a hydraulic module, wherein the multi-split indoor unit comprises a compressor, an outdoor heat exchanger, a first four-way valve, a second four-way valve and a third four-way valve, four interfaces of the first four-way valve are respectively connected with an exhaust end of the compressor, one end of the multi-split indoor unit, one interface of the second four-way valve and a return air end of the compressor, the other three interfaces of the second four-way valve are respectively connected with one end of the hydraulic module, one end of the outdoor heat exchanger and one interface of the third four-way valve, and the other three interfaces of the third four-way valve are respectively connected with the other end of the outdoor heat exchanger, the; the hydraulic module comprises a hydraulic heat exchanger and a ground source side, wherein the hydraulic heat exchanger is connected with the ground source side through a water inlet pipe and a water return pipe, and heat exchange is carried out between the hydraulic heat exchanger and ground source water on the ground source side to provide a heat source for the multi-connected indoor unit; the system also comprises an environment temperature unit for detecting the outdoor environment temperature in real time, so that the hydraulic module is correspondingly selected to be started or stopped as a heat source based on the detected outdoor environment temperature in a low-temperature environment, and the power-on or power-off actions of the first four-way valve, the second four-way valve and the third four-way valve are correspondingly controlled.
Further, when the hydraulic module is started to serve as a heat source, the first four-way valve is powered on, and the second four-way valve and the third four-way valve are powered off.
Further, when the outdoor heat exchanger is activated as a heat source and the hydro module is deactivated, the first, second, and third four-way valves are energized.
Further, when the detected outdoor environment temperature is lower than the rated temperature value, the hydraulic module is started and the indoor heat exchanger is stopped; conversely, when the detected outdoor environment temperature is higher than the rated temperature value, the hydraulic module is deactivated and the indoor heat exchanger is activated.
Further, the rated temperature value is 10 ℃.
Further, the water heating system also comprises a water temperature detection unit for detecting the water temperature condition of the hydraulic heat exchanger, wherein during the activation of the hydraulic module, if the detected water temperature is lower than the outdoor environment temperature detected in real time, the hydraulic module is deactivated and the outdoor heat exchanger is activated as a heat source.
And further, the water-cooled type water heater also comprises a water flow switch arranged on the water return pipe, whether the water outlet of the hydraulic heat exchanger is normal is judged based on the detection of the water flow switch, and if abnormal water flow is detected, the hydraulic module is stopped and the outdoor heat exchanger is started to serve as a heat source.
Further, the multi-connected indoor unit set is composed of a plurality of indoor units connected in parallel.
Further, the oil separator is further included, wherein the oil separator is respectively connected with the exhaust end of the compressor and the first four-way valve.
Further, the gas-liquid separator is arranged at the gas return end of the compressor.
The invention adopts the scheme, and has the beneficial effects that: through the double-heat-source mode of arranging the outdoor heat exchanger and the hydraulic heat exchanger, the ground source water with the temperature higher than the ambient temperature is used as a heat source in a low-temperature environment, and the refrigerant evaporates and absorbs heat at the hydraulic heat exchanger, so that the heat source is provided for the heating operation of the multi-connected indoor unit, the heating quantity and the comfort of the system are improved, and the effects of energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic diagram of a multi-split system according to the present embodiment.
The system comprises 100-outdoor units, 200-multi-connected indoor units, 300-hydraulic modules, 1-compressors, 5-outdoor heat exchangers, 2-first four-way valves, 3-second four-way valves, 4-third four-way valves, 6-oil separators, 7-gas-liquid separators, 8-electronic expansion valves, 9-hydraulic heat exchangers, 10-ground source sides, 11-ambient temperature units, 12-water temperature detection units and 13-water flow switches.
Detailed Description
To facilitate an understanding of the invention, the invention is described more fully below with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided so that this disclosure will be thorough and complete.
In this embodiment, referring to fig. 1, a multi-split system with multi-heat source switching includes a multi-split indoor unit 200, an outdoor unit 100, and a hydraulic module 300, and the three parts are connected by pipes to form the multi-split system, where the outdoor unit 100 includes a compressor 1, an outdoor heat exchanger 5, a first four-way valve 2, a second four-way valve 3, a third four-way valve 4, an oil separator 6, and a gas-liquid separator 7, where the first four-way valve 2 includes C, D, E, S four ports, the second four-way valve 3 includes H, I, J, K four ports, and the third four-way valve 4 includes U, V, W, X four ports.
Further, when the first four-way valve 2 is powered off, the interfaces D-C, S-E are communicated, and conversely, when the first four-way valve 2 is powered on, the interfaces D-E, S-C are communicated. When the second four-way valve 3 is powered off, the interface H-J, I-K is communicated, otherwise, when the second four-way valve 3 is powered on, the interface H-I, J-K is communicated. When the third four-way valve 4 is powered off, the interface U-W, V-X is communicated, otherwise, when the third four-way valve 4 is powered on, the interface U-V, W-X is communicated.
The hydraulic module 300 of this embodiment includes the hydraulic heat exchanger 9 and the ground source side 10, wherein, the hydraulic heat exchanger 9 is connected with the ground source side 10 through inlet tube and wet return, and the ground source water through the hydraulic heat exchanger 9 and the ground source side 10 carries out heat exchange and provides the heat source for the multi-connected indoor unit 200, still includes the temperature detecting element 12 that is used for detecting the temperature condition of the water of the hydraulic heat exchanger 9 and establishes the water flow switch 13 on the wet return, and wherein, the water flow switch 13 is used for detecting and judges whether the water of the hydraulic heat exchanger 9 is normal.
And further, a water pump for pumping water is arranged on the water outlet pipe.
In this embodiment, the D port of the first four-way valve 2 is connected to the exhaust end of the compressor 1 through the oil separator 6, the S port of the first four-way valve 2 is connected to the air return end of the compressor 1 through the gas-liquid separator 7, the E port of the first four-way valve 2 is connected to one end of the multi-connected indoor unit 200, and the C port of the first four-way valve 2 is connected to the H port of the second four-way valve 3; an I interface of the second four-way valve 3 is connected with one end of a refrigerant flow path of the hydraulic heat exchanger 9, a K interface of the second four-way valve 3 is connected with a gas return end of the compressor 1 through a gas-liquid separator 7, and a J interface of the second four-way valve 3 is connected with one end of the outdoor heat exchanger 5; a U interface of the third four-way valve 4 is connected with the other end of the outdoor heat exchanger 5, a V interface of the third four-way valve 4 is connected with the multi-connected indoor unit 200 through an electronic expansion valve 8, a W interface of the third four-way valve 4 is connected with the air return end of the compressor 1 through a gas-liquid separator 7, and an X interface of the third four-way valve 4 is connected with the other end of a refrigerant flow path of the hydraulic heat exchanger 9.
The multiple indoor unit 200 of the present embodiment is composed of a plurality of indoor units coupled in parallel by the branch pipes.
The outdoor heat exchanger is characterized by further comprising an environment temperature unit 11 for detecting the outdoor environment temperature in real time, so that the ground source side 10 is selectively activated or deactivated according to the detected outdoor environment temperature under the low-temperature environment, specifically, when the detected outdoor environment temperature is lower than a rated temperature value (the rated temperature value of the embodiment is preferably 10 ℃, namely, T4 ≦ 10 ℃), the hydraulic module 300 is activated and the outdoor heat exchanger 5 is deactivated, and conversely, when the detected outdoor environment temperature is higher than the rated temperature value (the rated temperature value of the embodiment is preferably 10 ℃, namely, T4 > 10 ℃), the outdoor heat exchanger 5 is activated and the hydraulic module 300 is not activated.
For ease of understanding, the above two cases will be described below with reference to specific refrigerant channels.
When the detected outdoor environment temperature is lower than the rated temperature value, the hydraulic module 300 is started as a heat source, the first four-way valve 2 is powered on, the second four-way valve 3 and the third four-way valve 4 are powered off, the high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the multi-connected indoor unit 200 through the D-E interface of the first four-way valve 2 to be condensed and released heat, the refrigerant after condensation and heat release flows into the hydraulic heat exchanger 9 through the electronic expansion valve 8 and the V-X interface of the third four-way valve 4 in sequence to exchange heat with the ground water from the ground source side 10, the refrigerant after evaporation and heat absorption flows back to the gas return end of the compressor 1 through the I-K interface and the gas-liquid separator 7 of the second four-way valve 3, the refrigerant circulation flow path when the hydraulic module 300 is started is completed, the outdoor heat exchanger 5 does not work at the moment, one end, the other end of the first four-way valve is communicated with a gas-liquid separator 7 through a J-K of the second four-way valve 3 and does not participate in a refrigerant heat exchange flow path in a hot water making mode.
Further, when the hydro module 300 is activated as a heat source, the water temperature is detected using the water temperature detection unit 12, wherein if the detected water temperature is lower than the outdoor ambient temperature detected in real time (i.e., water temperature < outdoor ambient temperature), the hydro module 300 is deactivated and the outdoor heat exchanger 5 is resumed as a heat source.
Further, when the hydro module 300 is activated as a heat source, the water flow condition is detected in real time by using the water flow switch 13, wherein if the water flow is detected to be abnormal (without the problems of ground source water flowing, water flow too small, etc.), the hydro module 300 is deactivated and the outdoor heat exchanger 5 is recovered to be used as a heat source.
When the detected outdoor environment temperature is higher than the rated temperature value, the outdoor heat exchanger 5 is started to be used as a heat source, the first four-way valve 2, the second four-way valve 3 and the third four-way valve 4 are electrified, and the refrigerant flow path at the moment is as follows: the high-temperature and high-pressure refrigerant discharged by the compressor 1 flows into the multi-connected indoor unit 200 for condensation and heat release after passing through the oil separator 6 and the D-E interface of the first four-way valve 2 in sequence, the refrigerant after condensation and heat release flows into the outdoor heat exchanger 5 for evaporation and heat absorption through the electronic expansion valve 8 and the V-U interface of the third four-way valve 4, the refrigerant after evaporation and heat absorption flows back to the air return end of the compressor 1 through the J-K interface of the second four-way valve 3 and the gas-liquid separator 7, and the refrigerant circulation flow path under the heating mode is completed. At this time, one end of a refrigerant flow path of the hydraulic heat exchanger 9 is communicated with the gas-liquid separator 7 through an X-W interface of the third four-way valve 4, the other end of the refrigerant flow path is communicated with the gas-liquid separator 7 through an I-H interface of the second four-way valve 3 and a C-S interface of the first four-way valve 2 in sequence, and the hydraulic heat exchanger 9 does not work and does not participate in a refrigerant heat exchange flow path in a heating mode.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to limit the present invention in any way. Those skilled in the art can make many changes, modifications, and equivalents to the embodiments of the invention without departing from the scope of the invention as set forth in the claims below. Therefore, equivalent changes made according to the spirit of the present invention should be covered within the protection scope of the present invention without departing from the contents of the technical scheme of the present invention.
Claims (10)
1. A multi-split system with multi-heat source switching comprises a multi-split indoor unit (200), an outdoor unit (100) and a hydraulic module (300), and is characterized in that: the multi-connected indoor unit (200) comprises a compressor (1), an outdoor heat exchanger (5), a first four-way valve (2), a second four-way valve (3) and a third four-way valve (4), wherein four interfaces of the first four-way valve (2) are respectively connected with an exhaust end of the compressor (1), one end of the multi-connected indoor unit (200), one interface of the second four-way valve (3) and a return air end of the compressor (1), the other three interfaces of the second four-way valve (3) are respectively connected with one end of a hydraulic module (300), one end of the outdoor heat exchanger (5) is connected with one interface of the third four-way valve (4), and the other three interfaces of the third four-way valve (4) are respectively connected with the other end of the outdoor heat exchanger (5), the other end of the hydraulic module (300) and the other end; the hydraulic module (300) comprises a hydraulic heat exchanger (9) and a ground source side (10), wherein the hydraulic heat exchanger (9) is connected with the ground source side (10) through a water inlet pipe and a water return pipe, and heat exchange is carried out on ground source water of the hydraulic heat exchanger (9) and the ground source side (10) to provide a heat source for the multi-connected indoor unit (200); the low-temperature-resistant water power source device is characterized by further comprising an environment temperature unit (11) used for detecting the outdoor environment temperature in real time, so that the hydraulic module (300) is correspondingly selected to be started or stopped as a heat source based on the detected outdoor environment temperature in a low-temperature environment, and the power-on or power-off actions of the first four-way valve (2), the second four-way valve (3) and the third four-way valve (4) are correspondingly controlled.
2. A multi-split system with multi-heat source switching as defined in claim 1, wherein: when the hydraulic module (300) is started to serve as a heat source, the first four-way valve (2) is powered on, and the second four-way valve (3) and the third four-way valve (4) are powered off.
3. A multi-split system with multi-heat source switching as defined in claim 1, wherein: when the outdoor heat exchanger (5) is started as a heat source and the hydraulic module (300) is stopped, the first four-way valve (2), the second four-way valve (3) and the third four-way valve (4) are powered.
4. A multi-split system with multi-heat source switching as defined in claim 1, wherein: when the detected outdoor environment temperature is lower than the rated temperature value, the hydraulic module (300) is started and the indoor heat exchanger is stopped; conversely, when the detected outdoor ambient temperature is higher than the rated temperature value, the hydro module (300) is deactivated and the indoor heat exchanger is activated.
5. A multi-split system with multi-heat source switching as defined in claim 4, wherein: the rated temperature value is 10 ℃.
6. A multi-split system with multi-heat source switching as defined in claim 1, wherein: the water heating system also comprises a water temperature detection unit (12) for detecting the water temperature condition of the hydraulic heat exchanger (9), wherein during the activation of the hydraulic module (300), if the detected water temperature is lower than the outdoor environment temperature detected in real time, the hydraulic module (300) is deactivated and the outdoor heat exchanger (5) is activated as a heat source.
7. A multi-split system with multi-heat source switching as defined in claim 1, wherein: the water-saving device is characterized by further comprising a water flow switch (13) arranged on the water return pipe, whether the water outlet of the hydraulic heat exchanger (9) is normal or not is judged based on the detection of the water flow switch (13), and if the water flow switch detects that the water flow is abnormal, the hydraulic module (300) is deactivated and the outdoor heat exchanger (5) is started to serve as a heat source.
8. A multi-split system with multi-heat source switching as defined in claim 1, wherein: the multi-connected indoor unit (200) is composed of a plurality of indoor units connected in parallel.
9. A multi-split system with multi-heat source switching as defined in claim 1, wherein: the oil separator is characterized by further comprising an oil separator (6), wherein the oil separator (6) is respectively connected with the exhaust end of the compressor (1) and the first four-way valve (2).
10. A multi-split system with multi-heat source switching as defined in claim 1, wherein: the gas-liquid separator (7) is arranged at the gas return end of the compressor (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010978778.5A CN112050329A (en) | 2020-09-17 | 2020-09-17 | Multi-split system with multi-heat source switching function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010978778.5A CN112050329A (en) | 2020-09-17 | 2020-09-17 | Multi-split system with multi-heat source switching function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594871A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Defrosting control method of multifunctional multi-split system with double four-way valves |
| EP4253874A1 (en) * | 2022-03-28 | 2023-10-04 | Guangdong Carrier HVAC Co., Ltd. | Variable refrigerant flow system and control method |
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| CN210980430U (en) * | 2019-04-08 | 2020-07-10 | 博拓(苏州)新能源技术有限公司 | Double-heat-source heat pump circulating system of air source and ground source |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102080900A (en) * | 2009-12-01 | 2011-06-01 | 烟台欧森纳地源空调有限公司 | Ground source heat pump system of geographical evaporation type |
| CN204063300U (en) * | 2014-08-14 | 2014-12-31 | 铁道第三勘察设计院集团有限公司 | A kind of soil composite type variable refrigerant flow aircondition |
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| CN210980430U (en) * | 2019-04-08 | 2020-07-10 | 博拓(苏州)新能源技术有限公司 | Double-heat-source heat pump circulating system of air source and ground source |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112594871A (en) * | 2020-12-31 | 2021-04-02 | 广东积微科技有限公司 | Defrosting control method of multifunctional multi-split system with double four-way valves |
| EP4253874A1 (en) * | 2022-03-28 | 2023-10-04 | Guangdong Carrier HVAC Co., Ltd. | Variable refrigerant flow system and control method |
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Application publication date: 20201208 |