CN115013894A - Water-cooled air conditioner - Google Patents
Water-cooled air conditioner Download PDFInfo
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- CN115013894A CN115013894A CN202210661240.0A CN202210661240A CN115013894A CN 115013894 A CN115013894 A CN 115013894A CN 202210661240 A CN202210661240 A CN 202210661240A CN 115013894 A CN115013894 A CN 115013894A
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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
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/86—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
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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
- 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
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- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of water-cooled air conditioners, in particular to a water-cooled air conditioner. A water-cooled air conditioner includes: outdoor unit and indoor unit. The outdoor unit includes: the water cooling cavity is provided with a cooling water container. The compressor chamber is provided with a compressor. And a heat exchanger is arranged between the water cooling chamber and the compressor chamber. The cooling water container is connected with the heat exchanger through a water delivery pipe and a water return pipe to form a cooling water self-circulation passage. The indoor unit is communicated with the outdoor unit. And a coolant passage is formed among the compressor, the heat exchanger and the indoor unit. The water-cooled air conditioner has the following advantages: the heat exchange efficiency is improved. The temperature of the cooling water is ensured to meet the heat exchange requirement. Simple structure has reduced area occupied, easy to assemble.
Description
Technical Field
The invention relates to the technical field of water-cooled air conditioners, in particular to a water-cooled air conditioner.
Background
At present, the air conditioner becomes one of the indispensable electrical equipment in people's life and work, through the regulation of air conditioner to ambient temperature, can provide the comfortable environment of a temperature ratio suitable for the user.
The traditional household split air conditioner external unit adopts an air-cooled condenser and adopts a refrigerant to directly exchange heat for a room; the commercial air conditioner mostly adopts a water-cooled condenser and adopts secondary refrigerant to indirectly exchange heat for rooms; the commercial machine water-cooled condenser has high heat exchange efficiency, but needs to be provided with an independent main machine room and an independent cooling tower, has complex equipment pipelines and high initial investment cost, and is not suitable for single families; the air-cooled heat exchanger of the household split air conditioner has low efficiency, and the heat exchange area needs a larger space, so that the size of the outdoor unit is generally larger, the outdoor unit occupies a larger space, and the outdoor unit is very inconvenient to install.
Disclosure of Invention
In view of the above, the present invention is directed to a water-cooled air conditioner, in which a fan chamber inside an air conditioner external machine is replaced with a water-cooled chamber, cooling water is input into a heat exchanger, the cooling water after heat exchange is discharged into a cooling water container to form a self-circulating cooling water system, a water discharge port of the heat exchanger is communicated with the outside, a water return port of the cooling water container is communicated with an external water source, and the cooling water system is controlled to switch between self-circulation and external circulation according to the temperature of the cooling water input into the heat exchanger and the temperature of the water discharged from the heat exchanger, so as to solve the problems of low heat exchange efficiency, large occupied area, and inconvenient installation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a water-cooled air conditioner includes:
an outdoor unit, comprising:
the water cooling cavity is provided with a cooling water container;
a compressor chamber provided with a compressor;
a heat exchanger is arranged between the water cooling chamber and the compressor chamber;
the cooling water container is connected with the heat exchanger through a water conveying pipe and a water return pipe to form a cooling water circulation passage;
the indoor unit is communicated with the outdoor unit;
a coolant passage is formed between the compressor, the heat exchanger and the chamber.
Furthermore, the cooling water container is provided with a water outlet and a water return port;
the heat exchanger is provided with a water outlet and a water inlet;
the water outlet is communicated with the water inlet through the water conveying pipe;
the water return port is communicated with the water outlet through the water return pipe.
Furthermore, a water pump is arranged on the water delivery pipe.
Further, the cooling water container is communicated with an external water source through a water inlet pipe;
the water outlet is communicated with the outside through a water drain pipe;
the external water source, the cooling water container, the water delivery pipe, the heat exchanger and the water discharge pipe form a cooling water external circulation passage.
Furthermore, a water inlet temperature sensor is arranged at the water inlet;
a drainage temperature sensor is arranged at the drainage outlet;
and a water level sensor is arranged at the water return port.
Further, a first coolant circulation port and a second coolant circulation port are arranged in the compressor chamber;
the heat exchanger is communicated with the indoor unit through the first coolant circulation port;
the compressor, the heat exchanger, the second coolant communication port and the indoor unit are communicated through a four-way valve.
A control method of a water-cooled air conditioner for controlling an operation of the water-cooled air conditioner according to any one of the above, comprising:
the control mode of the self-circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, cooling water is input into a heat exchanger from a cooling water container through a water delivery pipe and a water pump, and the water after heat exchange is conveyed to the cooling water container from a water outlet through a water return pipe;
the control mode of the external circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, an external water source is input into the cooling water container through the water inlet pipe, water in the cooling water container is input into the heat exchanger through the water delivery pipe and the water pump, and the water after heat exchange is discharged to the outside from the water outlet through the water discharge pipe.
Furthermore, the operation of switching between the self-circulation water cooling system and the external circulation water cooling system is controlled according to the water inlet temperature and the water outlet temperature.
Further, in the refrigeration or dehumidification mode, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system comprises:
setting a first temperature threshold Tc 0 Second temperature threshold Tc 1 And a third temperature threshold Tc 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when the Ti is more than or equal to Tc 0 When the compressor is in a stop state, the compressor is switched to the running state of the external circulation water cooling system;
when Ti is less than Tc in the running state of the self-circulation water cooling system 0 When the temperature of the water is measured To, when Tc 1 ≤To＜Tc 2 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is more than or equal To Tc in the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
switching from the running state of the external circulation water cooling system to the running state of the self-circulation water cooling system through the transition state;
wherein, in the process of switching from the running state of the external circulation water cooling system to the transition state, temperature compensation delta T is carried out 2 Satisfies To < Tc 2 -ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 Satisfies To < Tc 1 -ΔT 1 。
Further, in the heating mode, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system includes:
setting a fourth temperature threshold Th 0 Fifth temperature threshold Th 1 And a sixth temperature threshold Th 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when Ti is less than Th 0 When the temperature is higher than the set temperature, switching to the running state of the external circulation water cooling system;
when Ti is more than or equal to Th under the running state of the self-circulation water cooling system 0 Then, the water temperature To is measured, as Th 2 ＜To≤Th 1 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is less than or equal To Th under the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
the running state of the external circulation water cooling system is switched to the running state of the self-circulation water cooling system through the transition state;
wherein, in the process of switching from the running state of the external circulation water cooling system to the transition state, temperature compensation delta T is carried out 2 To satisfy To < Th 2 +ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 Satisfy To < Th 1 +ΔT 1 。
Compared with the prior art, the water-cooled air conditioner has the following advantages:
the technical scheme has the advantages that the fan of the air conditioner external unit is replaced by the cooling water container, the cooling water is input into the heat exchanger, and the water after heat exchange is discharged into the cooling water container to form the self-circulation cooling water system, so that the heat exchange efficiency is improved. The cooling water container is communicated with an external water source, the water outlet is communicated with the outside to form an external circulation cooling water system, and the cooling water system is controlled to be switched between circulation and external circulation according to the temperature of cooling water input to the heat exchanger and the temperature of water discharged from the heat exchanger, so that the temperature of the cooling water is ensured to meet the heat exchange requirement. Simple structure has reduced area occupied, easy to assemble.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a self-circulation water cooling system in an outdoor unit cooling mode of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic view of an external circulation water cooling system in an outdoor unit cooling mode of an air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of a self-circulation water cooling system in an outdoor unit heating mode of an air conditioner according to an embodiment of the present invention;
FIG. 4 is a schematic view of an external circulation water cooling system in an outdoor heating mode of an air conditioner according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating an outdoor unit control method of an air conditioner according to an embodiment of the present invention;
fig. 6 is a graph illustrating a method for controlling switching of an outdoor unit water cooling system of an air conditioner according to an embodiment of the present invention;
fig. 7 is a graph illustrating a method for controlling switching of an outdoor unit water cooling system of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
100-cooling water chamber, 110-cooling water container, 111-water return port, 112-water outlet, 113-water level sensor, 120-water conveying pipe, 121-water pump, 130-water return pipe, 140-three-way pipe, 150-water inlet pipe, 160-water outlet pipe, 200-compressor chamber, 210-compressor, 220-four-way valve, 230-first coolant circulation port, 240-second coolant circulation port, 300-heat exchanger, 310-water inlet, 311-water inlet temperature sensor, 321-water discharge temperature sensor and 320-water outlet.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The descriptions of "first," "second," "upper," "lower," etc. in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first," "second," "upper," "lower," may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it is necessary that a person skilled in the art can realize the combination, and the technical solutions in the embodiments are within the protection scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1 and 2, a water-cooled air conditioner includes: outdoor units and indoor units (not shown). The outdoor unit includes: a water cooling chamber 100 and a compressor chamber 200, the water cooling chamber 100 is provided with a cooling water container 110. The compressor chamber 200 is provided with a compressor 210. A heat exchanger 300 is provided between the water-cooled chamber 100 and the compressor chamber 200. The cooling water container 110 is connected to the heat exchanger 300 through a water pipe 120 and a water return pipe 130 to form a cooling water self-circulation path. And the indoor unit is communicated with the outdoor unit. A coolant passage is formed among the compressor 210, the heat exchanger 300, and the indoor unit.
The water cooling chamber 100 with the cooling water container 110 is used for replacing the air cooling chamber in the outdoor unit of the existing household air-conditioning equipment, and the water cooling mode is used for replacing the air cooling mode. The cooling water tank 110 and the heat exchanger 300 are connected to each other by a water pipe 120 and a water return pipe 130, thereby forming a cooling water self-circulation path. Specifically, the cooling water tank 110 inputs cooling water to the heat exchanger 300 through the water pipe 120, the cooling water is discharged from the heat exchanger 300 after heat exchange by the heat exchanger 300, and is delivered to the cooling water tank 110 through the water return pipe 130, thereby forming a cooling water self-circulation path. The circulation of the coolant between the compressor 210 and the heat exchanger in the compressor compartment 200 is the same as in the prior art and will not be described herein. The coolant exchanges heat with the cooling water while passing through the heat exchanger 300.
The water-cooled air conditioner with the structure of the embodiment improves the heat exchange efficiency, has a simple structure, reduces the occupied area and is convenient to install.
Specifically, the cooling water container 110 is provided with a water outlet 112 and a water return port 111. The heat exchanger 300 is provided with a drain port 320 and a water inlet 310. The water outlet 112 is communicated with the water inlet 310 through the water pipe 120. The return port 111 and the drain port 320 are communicated through the return pipe 130.
The water outlet 112, the water pipe 120 and the water inlet 310 form a water inlet passage, the water outlet 112, the water return pipe 130 and the water return port 111 form a self-circulation water outlet passage, and the cooling water container 110, the water inlet passage, the heat exchanger 300 and the self-circulation water outlet passage form a cooling water self-circulation passage.
Further, a water pump 121 is disposed on the water pipe 120.
The cooling water is accelerated by the water pump 121 to be introduced into the heat exchanger 300.
Further, the cooling water container 110 is communicated with an external water source (not shown) through a water inlet pipe 150. The drain port 320 communicates with the outside through the drain pipe 160. The external water source, the cooling water container 110, the water feeding pipe 120, the heat exchanger 300, and the water discharging pipe 160 form a cooling water external circulation path.
After the heat exchange of the self-circulation passage of the cooling water for a long time, the temperature of the cooling water is gradually increased, the cooling water can not play a role when the water temperature exceeds the threshold range, and the heat exchange can not be effectively carried out. The replacement of the cooling water is realized, and the cooling water can effectively exchange heat with the condensing agent.
Further, an inlet water temperature sensor 311 is disposed at the inlet 310. A drain temperature sensor 321 is provided in the drain port 320. A water level sensor 113 is provided at the water return port 111.
The water temperature of the water inlet is measured through the water inlet temperature sensor, the water temperature of the water outlet is measured through the water discharging temperature sensor, and when the water temperature of the water inlet and the water temperature of the water outlet do not meet the conditions of a preset self-circulation system, the water is switched to the operation of an external circulation cooling water system to replace the water in the cooling water container. And when the water temperature of the water inlet and the water temperature of the water outlet meet the preset conditions of the self-circulation system, switching to a self-circulation cooling water system. When water is supplied into cooling water tank 110, the water level is detected by water level sensor 113, and when the water level reaches a predetermined level, the supply of external cooling water is stopped, thereby preventing the water from overflowing.
Further, a first coolant flow port 230 and a second coolant flow port 240 are provided in the compressor chamber 200. The heat exchanger 300 is communicated with the indoor unit through the first coolant circulation port 230. The compressor 210, the heat exchanger 300, the second coolant communication port 240, and the indoor unit are communicated through a four-way valve 220.
The above structure forms a coolant circulation path of the air conditioner, and the circulation mode of the coolant is controlled according to a cooling mode and a heating mode.
A control method of a water-cooled air conditioner for controlling an operation of the water-cooled air conditioner according to any one of the above, comprising:
the self-circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, wherein cooling water is input into the heat exchanger 300 from the cooling water container 110 through the water pipe 120 and the water pump 121, and the water after heat exchange is conveyed to the cooling water container 110 from the water outlet 320 through the water return pipe 130.
The external circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, wherein an external water source is input into the cooling water container 110 through the water inlet pipe 150, water in the cooling water container 110 is input into the heat exchanger 300 through the water delivery pipe 120 and the water pump 121, and the water after heat exchange is discharged to the outside from the water outlet 320 through the water discharge pipe 160.
The self-circulation water cooling system and the external circulation water cooling system can be used for cooling water circulation in a refrigeration or dehumidification mode and a heating mode, the structure is simple, the occupied area is reduced, the installation is convenient, and the heat exchange efficiency is improved.
Furthermore, the operation of switching between the self-circulation water cooling system and the external circulation water cooling system is controlled according to the water inlet temperature and the water outlet temperature.
Further, in the refrigeration or dehumidification mode, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system comprises:
setting a first temperature threshold Tc 0 Second temperature threshold Tc 1 And a third temperature threshold Tc 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when the Ti is more than or equal to Tc 0 When the compressor is in a stop state, the compressor is switched to the running state of the external circulation water cooling system;
when Ti is less than Tc in the running state of the self-circulation water cooling system 0 When the temperature of the water is measured, To is measured as Tc 1 ≤To＜Tc 2 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is more than or equal To Tc under the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
switching from the running state of the external circulation water cooling system to the running state of the self-circulation water cooling system through the transition state;
wherein, in the process of switching from the running state of the external circulation water cooling system to the transition statePerforming temperature compensation of delta T 2 Satisfies To < Tc 2 -ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 To satisfy To < Tc 1 -ΔT 1 。
Further, in the heating mode, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system includes:
setting a fourth temperature threshold Th 0 Fifth temperature threshold Th 1 And a sixth temperature threshold Th 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when Ti is less than Th 0 When the temperature is higher than the set temperature, switching to the running state of the external circulation water cooling system;
when Ti is more than or equal to Th under the running state of the self-circulation water cooling system 0 Then, the water temperature To is measured, as Th 2 ＜To≤Th 1 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is less than or equal To Th under the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
switching from the running state of the external circulation water cooling system to the running state of the self-circulation water cooling system through the transition state;
wherein, in the process of switching from the running state of the external circulation water cooling system to the transition state, temperature compensation delta T is carried out 2 To satisfy To < Th 2 +ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 Satisfy To < Th 1 +ΔT 1 。
Specifically, the control method of the water-cooled air conditioner will be described by way of example below. The control method comprises the following steps: the air conditioner cooling mode + water system self-circulation, the air conditioner cooling mode + water system external circulation, the air conditioner heating mode + water system self-circulation and the air conditioner heating mode + water system external circulation.
1. Air conditioner refrigeration mode + water system self-circulation
As shown in fig. 1.
Refrigerant circulation: the refrigerant enters the heat exchanger 300 from the compressor 210 through the four-way valve 220, and indirectly exchanges heat with the water circuit system, and the heat of the refrigerant is taken away by the water in the water system, so that the condensation purpose is achieved. The refrigerant after heat exchange is cooled and depressurized through the throttle valve, and then enters the evaporator of the indoor unit through the first coolant circulation port 230 to exchange heat. The refrigerant heat-exchanged in the indoor unit is recovered to the compressor 210 through the four-way valve 220 via the second refrigerant circulation port 240, thereby completing the refrigerant cycle.
Self-circulation of a water system: the water in the cooling water container 110 enters the heat exchanger 300 through the water pump 121 for heat exchange, so that the refrigerant entering the heat exchanger 300 from the compressor 210 is cooled, and the cooling water after heat exchange is conveyed back to the cooling water container 110 through the water return pipe 130, thereby completing the self-circulation of the water system.
2. Air conditioner refrigeration mode + water system external circulation
As shown in fig. 2.
Refrigerant circulation: the same as in mode 1 will not be described again.
External circulation of a water system: the cooling water in the cooling water container 110 is input into the heat exchanger to exchange heat with the refrigerant input into the heat exchanger in the same manner as in manner 1, and at the same time, an external water source is input into the cooling water container 110 through the water inlet pipe 150 to replenish the cooling water container 110. After heat exchange, the refrigerant is cooled, cooling water is discharged to the outside of the air conditioner through a drain pipe, the water originally stored in the cooling water container 110 is discharged, an external water source replenishes the cooling water to the cooling water container 110, the external circulation of a water system is completed, and meanwhile, the replacement of the cooling water is completed.
3. Air conditioner heating mode + water system self-circulation
As shown in fig. 3.
Refrigerant circulation: the refrigerant passes through the four-way valve 220 from the compressor 210 and enters the indoor unit through the second coolant circulation port 240, after the indoor unit completes heating and condensation, the high-temperature and high-pressure refrigerant enters the heat exchanger 300 of the outdoor unit through the first coolant circulation port 230 to exchange heat with cooling water, and the refrigerant absorbs heat in the water system to evaporate. The refrigerant after heat exchange is recovered to the compressor 210 through the four-way valve 220, completing the refrigerant cycle.
Self-circulation of a water system: the same as in mode 1 will not be described again.
4. Modulation hot mode + water system external circulation
As shown in fig. 4.
Refrigerant circulation: the same as in mode 3 will not be described again.
External circulation of a water system: the same as in mode 2 will not be described again.
In the external circulation of the water system in the above modes 2 and 4, since the cooling water is in the self-circulation state, after long-time heat exchange, the water temperature is continuously increased or decreased, and as time goes by, the water in the self-circulation of the water system becomes low-grade energy, that is, the heat exchange efficiency with the refrigerant is decreased, at this time, the low-grade energy needs to be discharged, new tap water is introduced for supplement, and the high-efficiency heat exchange with the refrigerant is maintained.
Specifically, as shown in fig. 5, an operation control method of an air conditioner, that is, a method of controlling switching between a self-circulation water cooling system and an external circulation water cooling system in different modes of a cooling or dehumidifying mode and a heating mode, includes:
firstly, after the air conditioner is started, the system judges the operation mode.
1. When the operation mode is a refrigeration or defrosting mode, the water system starts self-circulation operation, detects the water inlet temperature Ti through the water inlet temperature sensor 311, and passes through the preset time t 1 Then, whether Ti is less than or equal to Tc is judged 0 Wherein is Tc 0 -a first temperature threshold. The first temperature threshold is the temperature of the water at which the preset cooling operation is not started, and the first temperature threshold is a higher temperature value which indicates that if the temperature of the water entering the intermediate heat exchanger if the water system is below Tc 0 Later, satisfy the heat transfer demand of water system and refrigerant system, avoid the temperature of water too high, lead to waterThe warm refrigerant cannot be cooled, thereby causing compressor overload protection.
If Ti > Tc 0 When the compressor is not started, the water system is switched to an external circulation mode, and the detection is continuously repeated; until the condition of Ti less than or equal to Tc is satisfied 0 Until now.
When Ti > Tc 0 Measuring the temperature To of the water, and judging whether the condition To < Tc is met 1 Wherein is Tc 1 Is the second temperature threshold. If the condition is met, the temperature of the water system after heat exchange with the refrigerant is lower, the water system can be repeatedly utilized, the compressor normally operates, and the water system is in self-circulation.
If Tc 1 ≤To＜Tc 2 Wherein is Tc 2 -a third temperature threshold. Tc 1 And Tc 2 The relationship between them, as shown in fig. 6. Temperature higher than Tc 2 Is an external circulation area and has a temperature lower than Tc 1 Is a self-circulation area and has a temperature of Tc 1 And Tc 2 In between, in the transition region. In the transition region, the water temperature is slightly increased, the condensation requirement can be met, the water system still keeps self circulation, the rotating speed of the electronic water pump needs to be increased, and the heat exchange effect is enhanced by increasing the flow of the water system.
If To is greater than or equal To Tc 2 At the moment, the water temperature in the water system is too high, and the condensation heat exchange of the refrigerant cannot be met. At this point, the compressor frequency is reduced and then the water system is switched to external circulation, replacing the water in the system.
When the water temperature is lowered, temperature compensation delta T is needed 2 That is, it is necessary To satisfy To < Tc 2 -△T 2 Can it switch to the transition region. Similarly, when switching from the transition region to self-circulation, a temperature compensation Δ T is required 1 That is, it is necessary To satisfy To < Tc 1 -△T 1 。
2. When the operation mode is the heating mode, the water system starts the self-circulation operation, and detects the water inlet temperature Ti through the water inlet temperature sensor 311 after the preset time t 1 Then, whether Ti is equal to or greater than Th is judged 0 Wherein, Th 0 -a fourth temperature threshold. The fourth temperature threshold is to ensure that the water temperature is notThe water temperature is too low, so that the evaporation effect of the refrigerant circulation cannot be ensured, and the water needs to be supplemented by external circulation.
If Ti < Th 0 When the compressor is not started, the water system is switched to an external circulation mode, and the detection is continuously repeated; until the condition Ti is more than or equal to Th is satisfied 0 Until now.
When Ti < Th 0 Measuring the temperature To of water, and judging whether the condition To > Th is met 1 Wherein, Th 1 Is the fifth temperature threshold. If the condition is met, the temperature of the water system after heat exchange with the refrigerant is higher, the water system can be repeatedly utilized, the compressor and the water pump normally operate, and the water system is in self-circulation.
If Th 2 ≤To≤Th 1 Wherein, Th 2 -a sixth temperature threshold. Th 1 And Th 2 The relationship between them is shown in fig. 7. Temperature lower than Th 2 The temperature is higher than Th 1 The time is a self-circulation area, and the temperature is at Th 1 And Th 2 And belongs to the transition region. In the transition region, the water temperature is slightly reduced, the condensation requirement can be met, the water system still keeps self-circulation, the rotating speed of the electronic water pump needs to be increased, and the heat exchange effect is enhanced by increasing the flow of the water system.
If To < Th 2 At this time, the water temperature in the water system is too low to meet the heat exchange of the refrigerant. At this point, the compressor frequency is reduced and then the water system is switched to external circulation, replacing the water in the system.
When the water temperature rises, temperature compensation delta T is needed 2 That is, it is necessary To satisfy To < Tc 2 +△T 2 Can it switch to the transition region. Similarly, when switching from the transition region to self-circulation, a temperature compensation Δ T is required 1 That is, it is necessary To satisfy To < Tc 1 -△T 1 。
3. When the operation mode is neither the cooling or dehumidifying mode nor the heating mode, the outdoor unit does not need to start any load.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A water-cooled air conditioner, characterized by comprising:
an outdoor unit, comprising:
the water cooling cavity is provided with a cooling water container;
a compressor chamber provided with a compressor;
a heat exchanger is arranged between the water cooling chamber and the compressor chamber;
the cooling water container is connected with the heat exchanger through a water conveying pipe and a water return pipe to form a cooling water self-circulation passage;
the indoor unit is communicated with the outdoor unit;
a coolant passage is formed between the compressor, the heat exchanger and the chamber.
2. The water-cooled air conditioner according to claim 1,
the cooling water container is provided with a water outlet and a water return port;
the heat exchanger is provided with a water outlet and a water inlet;
the water outlet is communicated with the water inlet through the water conveying pipe;
the water return port is communicated with the water outlet through the water return pipe.
3. The water-cooled air conditioner according to claim 2,
the water delivery pipe is provided with a water pump.
4. The water-cooled air conditioner according to claim 2,
the cooling water container is communicated with an external water source through a water inlet pipe;
the water outlet is communicated with the outside through a water drainage pipe;
the external water source, the cooling water container, the water delivery pipe, the heat exchanger and the water discharge pipe form a cooling water external circulation passage.
5. The water-cooled air conditioner according to claim 4,
a water inlet temperature sensor is arranged at the water inlet;
a drainage temperature sensor is arranged at the drainage outlet;
and a water level sensor is arranged at the water return port.
6. The water-cooled air conditioner according to claim 1,
a first coolant flow port and a second coolant flow port are arranged in the compressor chamber;
the heat exchanger is communicated with the indoor unit through the first coolant circulation port;
the compressor, the heat exchanger, the second coolant communication port and the indoor unit are communicated through a four-way valve.
7. A control method of a water-cooled air conditioner, characterized by comprising the steps of:
the control mode of the self-circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, cooling water is input into a heat exchanger from a cooling water container through a water delivery pipe and a water pump, and the water after heat exchange is conveyed to the cooling water container from a water outlet through a water return pipe;
the control mode of the external circulation water cooling system comprises a refrigeration or dehumidification mode and a heating mode, an external water source is input into the cooling water container through the water inlet pipe, water in the cooling water container is input into the heat exchanger through the water delivery pipe and the water pump, and the water after heat exchange is discharged to the outside from the water outlet through the water discharge pipe.
8. The control method of a water-cooled air conditioner according to claim 7,
and controlling the self-circulation water cooling system and the external circulation water cooling system to switch and operate according to the water inlet temperature and the water outlet temperature.
9. The method for controlling a water-cooled air conditioner according to claim 8,
in the refrigeration or dehumidification mode, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system comprises the following steps:
setting a first temperature threshold Tc 0 Second temperature threshold Tc 1 And a third temperature threshold Tc 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when the Ti is more than or equal to Tc 0 When the compressor is in a stop state, the compressor is switched to the running state of the external circulation water cooling system;
when Ti is less than Tc in the running state of the self-circulation water cooling system 0 When the temperature of the water is measured, To is measured as Tc 1 ≤To＜Tc 2 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is more than or equal To Tc in the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
switching from the running state of the external circulation water cooling system to the running state of the self-circulation water cooling system through the transition state;
wherein, from the external circulationIn the process that the running state of the water cooling system is switched to the transition state, temperature compensation delta T is carried out 2 Satisfies To < Tc 2 -ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 Satisfies To < Tc 1 -ΔT 1 。
10. The control method of a water-cooled air conditioner according to claim 8,
in the heating mode state, the method for switching operation between the self-circulation water cooling system and the external circulation water cooling system comprises the following steps:
setting a fourth temperature threshold Th 0 Fifth temperature threshold Th 1 And a sixth temperature threshold Th 2 ；
Measuring the water inlet temperature Ti under the running state of the self-circulation water cooling system, and when Ti is less than Th 0 When the temperature is higher than the set temperature, switching to the running state of the external circulation water cooling system;
when Ti is more than or equal to Th under the running state of the self-circulation water cooling system 0 When the temperature is measured, To is measured, and when Th is 2 ＜To≤Th 1 In the transition state from the self-circulation water cooling to the external circulation water cooling, the self-circulation water cooling system is kept running, and the rotating speed of the water pump is increased to a preset value;
when To is less than or equal To Th under the running state of the self-circulation water cooling system 2 When the frequency of the compressor is reduced, the operation state of the external circulation water cooling system is switched to;
switching from the running state of the external circulation water cooling system to the running state of the self-circulation water cooling system through the transition state;
wherein, in the process of switching from the running state of the external circulation water cooling system to the transition state, temperature compensation delta T is carried out 2 To satisfy To < Th 2 +ΔT 2 ；
In the process of switching from the transition state to the running state of the self-circulation water cooling system, temperature compensation delta T is carried out 1 To satisfy To < Th 1 +ΔT 1 。
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