Water-saving and electricity-saving air conditioning system and refrigeration method
By using the condensed water generated by the evaporation and cooling of the condenser in the air conditioning unit, the air inlet temperature of the condenser is reduced, the problems of waste of condensate resources and high power consumption are solved, and the water and energy saving effect of the air conditioning unit is achieved .
Patent Information
- Application Number
- CN202411329525.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2024-12-27
AI Technical Summary
The condensate generated by existing direct expansion air conditioning units in refrigeration or dehumidification modes cannot be effectively utilized, resulting in waste of resources and high power consumption.
The condensed water generated by the evaporator is used as the evaporation cooling water source of the condenser. The isenthalpy humidification process is carried out through the evaporation cooling device to reduce the inlet air temperature of the condenser, thereby reducing the compressor power consumption and achieving water and energy saving.
Effective use of condensate water reduces the operating power consumption of air conditioning units, achieves water and energy saving effects, and solves the problems of waste of condensate resources and high power consumption.
Smart Images
Figure CN119196803A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of refrigeration of air-conditioning units, and in particular relates to a direct expansion air-conditioning unit. Background Art
[0002] With the national requirements of "carbon peak and carbon neutrality", higher requirements have been placed on water and energy conservation throughout the life cycle of buildings.
[0003] To solve this problem, a new direct expansion air conditioning unit is proposed. In this air conditioning unit, the condensed water produced by the evaporator is used as the evaporative cooling water source of the condenser. This method not only utilizes the evaporated condensed water, but also reduces the condenser inlet air temperature, reduces the operating power consumption of the air conditioning unit, and achieves water and energy saving at the same time. Summary of the invention
[0004] Purpose of the invention: In view of the above existing problems and shortcomings, the purpose of the present invention is to provide a water-saving and electricity-saving air conditioning system and refrigeration method.
[0005] Technical solution: To achieve the above invention purpose, the technical solution adopted by the present invention is: a water-saving and power-saving air conditioning system, including a compressor, a condenser, an evaporative cooling device and an evaporator assembly, The evaporator assembly includes a cabinet, an evaporator arranged in the cabinet, a water receiving tray arranged at the bottom of the evaporator, and a fan arranged below the evaporator, wherein the bottom of the water receiving tray is connected to a water pipe; The outlet of the compressor is connected to the condenser, the evaporative cooling device and the evaporator in sequence through a pipeline, and the refrigerant outlet of the evaporator is connected to the compressor through a refrigerant connecting pipe; the other end of the water pipe at the bottom of the water receiving pan is connected to the evaporator cooling device, the condenser and the evaporative cooling device are arranged close to each other, and a condensing fan is arranged on the outside of the condenser, and the condensing fan can form an airflow that flows through the evaporative cooling device and the condenser in sequence.
[0006] Preferably, the evaporator is composed of two condensation plates to form a V-shaped evaporator structure, and triangular plate sealing plates are respectively provided on both sides; the top of the V-shaped evaporator structure is the air inlet, the gap between the heat exchange tubes between the condensation plates is the air outlet, and the fan is located below the evaporator; the triangular plate sealing plate is provided with a liquid separator and an electronic expansion valve connected by a liquid pipe, and the outlet of the electronic expansion valve is used to connect to a spray device.
[0007] Preferably, the triangular plate sealing plate is also provided with a trapezoidal hole.
[0008] The present invention also provides a refrigeration method based on the above-mentioned water-saving and electricity-saving air conditioning system, comprising the following steps: S1, the low-temperature refrigerant produced by the compressor is sent to the evaporator through the refrigerant connecting pipe; S2, the fan under the evaporator starts to drive the hot and humid indoor air through the condensation plate of the evaporator. The hot and humid indoor air is cooled by the condensation plate and sent back to the room, and condensed water is formed on the condensation plate and collected through the water receiving tray; S3, the collected condensed water is directly sent to the evaporative cooling device through the liquid pipe; S4, the condensing fan rotates to make the air blow through the evaporative cooling device and the condenser in turn. The air produces heat and moisture exchange in the evaporative cooling device, and undergoes an isenthalpic humidification process. The air loses sensible heat, water vapor enters the air, the temperature decreases, and then blows through the condenser.
[0009] Beneficial effect: Compared with the prior art, when the direct expansion air-conditioning unit of the present invention is operating in cooling or dehumidification mode, when the surface temperature of the evaporator is lower than the air dew point temperature, condensed water will be generated. At present, my country discharges these condensed water into rainwater pipes without effective utilization; secondly, as an energy-saving measure, adding an evaporative cooling device on the condenser side can reduce the condenser inlet air temperature and further reduce the power consumption of the compressor. The evaporative cooling device requires a water source, but in most direct expansion air-conditioning usage scenarios in my country, there are no conditions to provide a water source; the present invention utilizes the condensed water generated on the evaporator side of the direct expansion air-conditioning unit, which is no longer discharged into drainage pipes such as rainwater pipes, and is used for the evaporative cooling device on the condenser side, thereby reducing the operating power consumption of the unit and achieving water and energy saving at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural schematic diagram of the water-saving and electricity-saving air conditioning system of the present invention; Figure 2 It is a structural schematic diagram of the evaporator assembly of the present invention.
[0011] Among them, there are compressor 1, condenser 2, evaporative cooling device 3, water pipe 4, evaporator 5, water receiving tray 6, refrigerant connecting pipe inlet section 7-1, refrigerant connecting pipe outlet section 7-2, condensing fan 8, electronic expansion valve 9, liquid distributor 10, and triangular plate sealing plate 11. DETAILED DESCRIPTION
[0012] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.
[0013] like Figure 1 and Figure 2As shown, the water-saving and power-saving air conditioning system of the present invention can be an integrated or split air conditioning unit. This embodiment takes a split air conditioning unit as an example, which mainly includes an indoor unit and an outdoor unit, wherein the outdoor unit includes a compressor, a condenser and an evaporative cooling device, and the indoor unit includes an evaporator assembly, wherein: The evaporator assembly includes a cabinet, an evaporator arranged in the cabinet, a water receiving tray arranged at the bottom of the evaporator and a fan arranged below the evaporator. The evaporator is a plate heat exchanger formed by connecting copper U-shaped heat exchange tubes in series and parallel. Two plate heat exchangers are tilted and spliced to form a V-shaped heat exchanger, and triangular plate sealing plates are designed and installed on both sides of the V-shaped heat exchanger for sealing. A liquid separator and an electronic expansion valve are fixed on the triangular plate sealing plate, which are connected to the liquid pump (not shown in the figure), the liquid separator and the electronic expansion valve in turn through pipelines, and are connected to the spray device in the evaporator. A water pipe is connected to the bottom of the water receiving tray to collect condensed water on the surface of the evaporator. A condensing fan is arranged below the evaporator to force the indoor air flow to pass through the evaporator from the top of the evaporator to cool down and then be sent out from the bottom.
[0014] The outdoor unit mainly includes a compressor, a condenser and an evaporative cooling device. The refrigerant outlet of the evaporator is connected to the compressor through the refrigerant connecting pipe inlet section, the compressor outlet is connected to the condenser, and the refrigerant outlet of the condenser is connected to the evaporator through the refrigerant connecting pipe outlet section. The other end of the water pipe at the bottom of the water receiving pan is connected to the evaporative cooling device. The condenser and the evaporative cooling device are arranged close to each other, and a condensing fan is arranged on the outside of the condenser. The condensing fan can form an airflow that flows through the evaporative cooling device and the condenser in sequence.
[0015] The refrigeration implementation method of the water-saving and power-saving air conditioning system of the present invention comprises the following steps: S1, the low-temperature refrigerant generated by the work of the compressor is sent to the evaporator through the refrigerant connecting pipe; S2, the fan under the evaporator is started to pass the high-temperature and high-humidity indoor air in the room through the condensation plate of the evaporator, and the high-temperature and high-humidity indoor air is sent back to the room after being cooled by the condensation plate, and condensed water is formed on the condensation plate and collected through a water receiving tray; S3, the collected condensed water is directly sent to the evaporative cooling device through the liquid pipe; S4, the condensation fan rotates to make the air blow through the evaporative cooling device and the condenser in turn, the air generates heat and moisture exchange in the evaporative cooling device, and an isenthalpic humidification process is performed, the air loses sensible heat, water vapor enters the air, the temperature is reduced, and then blown through the condenser.
[0016] The water-saving and power-saving air conditioning system of the present invention belongs to a new type of direct expansion air conditioning unit. The water receiving tray is placed at the lower side of the evaporator to receive the evaporated condensed water, and the condensed water is connected to the evaporative cooling device through a water pipe. The evaporative cooling device is placed behind the condenser. When the condensing fan rotates, a certain wind speed blows through the evaporative cooling device first, and heat and moisture exchange occurs in the evaporative cooling device, and an isenthalpic humidification process is performed. The air loses sensible heat, and water vapor enters the air, the temperature is reduced, and then blows through the condenser. The decrease in the condenser inlet temperature can reduce the power consumption of the compressor based on the air compression refrigeration cycle principle.
[0017] The main technical innovation of the present invention is: adding an evaporator cooling device, and collecting the V-shaped evaporator condensate that was originally discharged as rainwater and sewage, instead of directly discharging it. At the same time, an evaporative cooling device is used, and the water source comes from the evaporator condensate. The evaporative cooling device performs an isenthalpic humidification process, reduces the condenser inlet temperature, and reduces the power consumption of the compressor.
Claims
1. A water-saving and electricity-saving air conditioning system, characterized in that: Includes compressor, condenser, evaporative cooling unit and evaporator assembly, The evaporator assembly includes a cabinet, an evaporator arranged in the cabinet, a water receiving tray arranged at the bottom of the evaporator, and a fan arranged below the evaporator, wherein the bottom of the water receiving tray is connected to a water pipe; The outlet of the compressor is connected to the condenser, the evaporative cooling device and the evaporator in sequence through a pipeline, and the refrigerant outlet of the evaporator is connected to the compressor through a refrigerant connecting pipe; the other end of the water pipe at the bottom of the water receiving pan is connected to the evaporator cooling device, the condenser and the evaporative cooling device are arranged close to each other, and a condensing fan is arranged on the outside of the condenser, and the condensing fan can form an airflow that flows through the evaporative cooling device and the condenser in sequence.
2. The water-saving and electricity-saving air conditioning system according to claim 1, characterized in that: The evaporator is composed of two condensation plates to form a V-shaped evaporator structure, and triangular plate sealing plates are respectively provided on both sides; the top of the V-shaped evaporator structure is the air inlet, the gap between the heat exchange tubes between the condensation plates is the air outlet, and the fan is located below the evaporator; the triangular plate sealing plate is provided with a liquid separator and an electronic expansion valve connected by a liquid pipe, and the outlet of the electronic expansion valve is used to connect to a spray device.
3. The water-saving and electricity-saving air conditioning system according to claim 2 is characterized in that: The triangular plate sealing plate is also provided with a trapezoidal hole.
4. A refrigeration method based on the water-saving and electricity-saving air conditioning system according to any one of claims 1 to 3, characterized in that The following steps are involved: S1, the low-temperature refrigerant produced by the compressor is sent to the evaporator through the refrigerant connecting pipe; S2, the fan under the evaporator starts to drive the hot and humid indoor air through the condensation plate of the evaporator. The hot and humid indoor air is cooled by the condensation plate and sent back to the room, and condensed water is formed on the condensation plate and collected through the water receiving tray; S3, the collected condensed water is directly sent to the evaporative cooling device through the liquid pipe; S4, the condensing fan rotates to make the air blow through the evaporative cooling device and the condenser in turn. The air produces heat and moisture exchange in the evaporative cooling device, and undergoes an isenthalpic humidification process. The air loses sensible heat, water vapor enters the air, the temperature decreases, and then blows through the condenser.