CN212805991U - Air conditioning unit surface cooling subsection energy-saving control system - Google Patents
Air conditioning unit surface cooling subsection energy-saving control system Download PDFInfo
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- CN212805991U CN212805991U CN202021840071.XU CN202021840071U CN212805991U CN 212805991 U CN212805991 U CN 212805991U CN 202021840071 U CN202021840071 U CN 202021840071U CN 212805991 U CN212805991 U CN 212805991U
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Abstract
The utility model discloses an air conditioning unit surface cooling subsection energy-saving control system, wherein the surface cooler comprises an auxiliary surface cooler and a main surface cooler which are arranged up and down, two ports of the main surface cooler are respectively a first refrigerant inlet and a first refrigerant outlet, two ports of the auxiliary surface cooler are respectively a second refrigerant inlet and a second refrigerant outlet, the tail end of a main water supply pipeline passes through two independent first branch water supply pipelines, the second branch water supply pipe is connected with the first refrigerant inlet and the second refrigerant inlet respectively, the first refrigerant outlet is converged on the main water return pipeline through the first branch water return pipeline and the second refrigerant outlet is converged on the main water return pipeline through the second branch water return pipeline, the first branch water return pipeline is provided with a first regulating valve and a switching valve, the second branch water supply pipeline is provided with a second regulating valve, the switching valve is a three-way valve, and a third port of the switching valve is connected with the second refrigerant inlet of the auxiliary surface air cooler through the switching pipeline. The utility model has the advantages that: can achieve the purpose of energy conservation and consumption reduction.
Description
Technical Field
The utility model relates to an air conditioning unit table cold segmentation energy-saving control system.
Background
According to incomplete statistics, the heat productivity of process equipment and illumination in the load of an air conditioning system of a domestic industrial factory building is about 70-80%, the heat transfer capacity of an enclosure structure is about 20-30%, the heat transfer capacity of the enclosure structure is changed along with outdoor meteorological conditions, various performance technical parameters of an air conditioning unit are designed and selected according to extreme working conditions, the time for the maximum load capacity to appear all the year around is very short or even does not appear, and when the outdoor air temperature tw is less than the indoor design temperature tn, the heat transfer capacity passing through the enclosure structure is a negative value (more prominent in winter). When the indoor load changes, if adopt the operation of deciding the water temperature, excessive cooling in order to guarantee the humidity requirement can appear in the dehumidification season to need reheat, cause cold and hot energy waste phenomenon of offsetting.
An air conditioning system of an industrial factory building needs to provide a constant-temperature and constant-humidity process environment for a workshop, and an air conditioning unit is generally provided with various heat and humidity treatment means such as surface cooling, heating, humidifying and the like. The heat and moisture removal of the conventional air conditioning mode is realized by cooling, condensing and dehumidifying air through a surface air cooler and sending the cooled and dried air to a human room.
The principle that the surface cooler cools and dehumidifies the air is as follows: when outside refrigerated water flows into the surface cooler heat exchange coil, the cold energy in the refrigerated water is transmitted to the surfaces of the heat exchange coil and the fins of the surface cooler in a heat convection and heat conduction mode, so that the surface temperature of the heat exchange coil and the fins is reduced, and the temperature of the air flowing through the surface cooler at the periphery is reduced. When the surface temperature of the heat exchange coil and the fins of the surface cooler is reduced to be lower than the dew point temperature of the overflowing air, the moisture in the air can be condensed out, and therefore the dehumidification effect is achieved.
Under the working condition of cooling and dehumidifying in summer, the technical air conditioning system adopts a heat and humidity coupling treatment mode and needs to simultaneously meet two parameters of the temperature and the relative humidity of a workshop. Due to the limitation of the dew point temperature of indoor air, in order to meet dehumidification requirements, the air must reach a temperature below the dew point temperature, usually the dew point temperature is 16-18 ℃, and compared with the indoor temperature of 25-28 ℃, the air supply temperature is too low. Therefore, after the air is subjected to surface cooling and dehumidification, the air needs to be reheated to process the air to an air supply state point. The cold and heat counteraction wastes both heat and cold, so that the annual energy consumption of cold and heat sources is high. The reheating quantity required by the air conditioning unit is particularly obvious for a system with smaller cooling load in summer or larger air supply quantity design. However, because the domestic air-conditioning refrigeration system is designed and operated to uniformly provide low-temperature chilled water at the temperature of 7-10 ℃, the temperature of the cold water is far lower than the dew point temperature (16-18 ℃) of indoor air, the surface temperature of fins of the surface air cooler can be lower than the dew point temperature no matter how small the flow of the chilled water flows through the surface air cooler, the surface air cooler still can dehumidify, the dry and cold state of the surface air cooler cannot be guaranteed, and reheating after air dehumidification cannot be avoided.
Therefore, the energy-saving and consumption-reducing measures for eliminating the reheating of the air conditioning system are not only important management measures for the production and operation of each related industrial enterprise, but also meet the strategic requirements of national and social development.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide an air conditioning unit table cold segmentation energy-saving control system for improve the cold source and supply with cold volume's utilization ratio and save the extra consumption of energy that cold and hot offset, thereby reach energy saving and consumption reduction's purpose.
The utility model discloses a realize through following technical scheme:
an air conditioning unit surface cooling subsection energy-saving control system comprises a surface cooler, the surface cooler comprises an auxiliary surface cooler and a main surface cooler which are arranged up and down, two ports of a heat exchange coil of the main surface cooler are respectively a first refrigerant inlet and a first refrigerant outlet, two ports of the heat exchange coil of the auxiliary surface cooler are respectively a second refrigerant inlet and a second refrigerant outlet, the tail end of a main water supply pipeline is divided into two independent first branch water supply pipelines and second branch water supply pipelines, the tail end of the first branch water supply pipeline is connected with the first refrigerant inlet, the tail end of the second branch water supply pipeline is connected with the second refrigerant inlet, the first refrigerant outlet is converged on the main water return pipeline through the first branch water return pipeline and the second refrigerant outlet through the second branch water return pipeline, a first regulating valve and a switching valve are arranged on the first branch water return pipeline, and a second regulating valve is arranged on the second branch water supply pipeline, the switching valve is a three-way valve, and a third port of the switching valve is connected with a second refrigerant inlet of the auxiliary surface cooler through a switching pipeline.
Further, the first regulating valve and the second regulating valve are both two-way valves.
Compared with the prior art, the utility model has the following advantages:
the utility model provides a cold segmentation energy-saving control system of air conditioning unit surface, through setting up two surface coolers to be provided with the diverter valve of tee bend on the first branch wet return of main surface cooler, the third port of this diverter valve is connected with the second refrigerant entry of vice surface cooler through the switching pipeline, thereby can use the return water after the heat transfer of main surface cooler heaies up for the water supply of vice surface cooler, thereby realized the dry cooling of vice surface cooler to the air; and the auxiliary surface cooler has three operation modes of temperature reduction and dehumidification, dry cooling and no treatment by cooperating with the control of the two regulating valves, so that the air passing through the main surface cooler and the auxiliary surface cooler in the surface cooling section has different temperature and humidity parameters, the air passing through the surface cooling section can be mixed to a proper temperature and humidity state, a subsequent reheating procedure is not needed, the additional consumption of cold and heat offset energy is saved, and the purpose of energy conservation is achieved. Meanwhile, due to the fact that the switching valve is used for switching the return water after heat exchange and temperature rise of the main surface cooler to be used for water supply of the auxiliary surface cooler, the chilled water can be reused. On the whole, the deep heat exchange of the energy is realized, and the method has positive significance for reducing the conveying energy consumption of the water pump and improving the refrigerating efficiency of the refrigerator.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numbers in the figures: 1, secondary surface coolers; 2, a main surface cooler; 3 a first refrigerant inlet; 4 a first refrigerant outlet; 5 a second refrigerant inlet; 6 a second refrigerant outlet; 7 a main water supply pipeline; 8 a first branch water supply line; 9 a second branch water supply line; 10 a first branch return line; 11 a second branch return pipe; 12 total water return pipeline; 13 a first regulating valve; 14 switching valves; 15 a second regulating valve; 16 switching the circuit.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1, the embodiment discloses a surface cooling segmented energy-saving control system of an air conditioning unit, the air conditioning unit comprises a surface cooler, the surface cooler comprises an auxiliary surface cooler 1 and a main surface cooler 2 which are arranged up and down, two ports of a heat exchange coil of the main surface cooler 2 are a first refrigerant inlet 3 and a first refrigerant outlet 4 respectively, two ports of a heat exchange coil of the auxiliary surface cooler 1 are a second refrigerant inlet 5 and a second refrigerant outlet 6 respectively, the tail end of a main water supply pipeline 7 is divided into two independent first branch water supply pipelines 8 and a second branch water supply pipeline 9, the tail end of the first branch water supply pipeline 8 is connected with the first refrigerant inlet 3, the tail end of the second branch water supply pipeline 9 is connected with the second refrigerant inlet 5, the first refrigerant outlet 4 is converged on a main water return pipeline 12 through a first branch water return pipeline 10 and the second refrigerant return pipeline 6 through a second branch water return pipeline 11, the first branch water return pipeline 10 is provided with a first regulating valve 13 and a switching valve 14, the second branch water supply pipeline 9 is provided with a second regulating valve 15, and the first regulating valve 13 and the second regulating valve 15 are two-way valves. The switching valve 14 is a three-way valve, and a third port of the switching valve 14 is connected to the second refrigerant inlet 5 of the sub surface cooler 1 through a switching line 16.
In the embodiment, the two surface coolers can be respectively placed in different working conditions to operate by controlling the switching valve 14, the first regulating valve 13 and the second regulating valve 15. The main surface air cooler 2 mainly takes on the cooling load and the moisture load of the air. The auxiliary surface cooler 1 can be switched and adjusted between three modes of cooling and dehumidifying, dry cooling and non-processing according to the actual air supply temperature and humidity control requirements.
The chilled water supply is divided into two paths to respectively enter the main surface cooler 2 and the auxiliary surface cooler 1, wherein a second branch water supply pipeline 9 is provided with a second regulating valve 15 for regulating the flow of the chilled water of the auxiliary surface cooler 1; a first regulating valve 13 is arranged on a first branch water return pipeline 10 of the main surface air cooler 2 and used for regulating the flow rate of the chilled water of the main surface air cooler 2; meanwhile, a switching valve 14 is arranged on the first branch return water pipeline 10 of the main surface cooler 2 and used for shunting a part of return water of the main surface cooler 2 to enter the flow of the auxiliary surface cooler 1. At this moment, because the chilled water flowing into the auxiliary surface air cooler 1 has carried out heat exchange once in the main surface air cooler 2, the water temperature rises to some extent, and the average temperature of the surface of the heat exchange coil of the auxiliary surface air cooler 1 is slightly higher than the dew point temperature of the air, so the auxiliary surface air cooler 1 can not dehumidify the air, and only can cool the air, and the dry cooling of the auxiliary surface air cooler 1 to the air is realized. Therefore, the air passing through the surface cooling section main and auxiliary surface coolers 1 has different temperature and humidity parameters, and the air passing through the surface cooling section can be mixed to a proper temperature and humidity state by utilizing the two regulating valves to respectively regulate the output of cold energy, so that the required temperature and humidity requirement is met, the air passing through the surface cooling section does not need to be reheated, the additional consumption of cold and heat offset energy is saved, and the purpose of energy conservation is achieved.
The control system provided by the embodiment has the following three operation modes:
one, maximum cooling capacity mode
Under the condition of hot outdoor weather in summer, both indoor cold load and humidity load are large, and the processing flow is the same as that of a conventional air conditioning unit at the moment, and a dew point air supply operation mode is adopted. The switching valve 14 is opened to the position communicated with the main water return pipeline 12, the switching pipeline 16 is cut off, at the moment, the chilled water enters the main surface air cooler 2 and then is regulated in water flow by the first regulating valve 13 on the first branch water return pipeline 10, and the secondary surface air cooler 1 is regulated in chilled water flow entering the secondary surface air cooler 1 by the second regulating valve 15, so that the total cooling capacity of a cooling section is controlled.
Second, dehumidification mode
In the case of a reduction in the rainy season or in the heat production in the room, the cooling load in the room is greatly reduced, while the moisture load occupies the dominant position. The switching valve 14 is opened to a position communicating with the main water return line 12, the switching line 16 is cut off, the second regulating valve 15 is closed, and no chilled water flows through the sub surface air cooler 1, i.e., no heat and humidity load is borne. The first adjusting valve 13 is opened, and the first adjusting valve 13 is responsible for adjusting the flow of the chilled water flowing through the main surface cooler 2 and controlling the air supply humidity. The air treated by the main surface cooler 2 and the mixed air untreated by the auxiliary surface cooler 1 are mixed again after the surface cooling section to reach the preset air supply temperature and humidity point, so that the subsequent reheating process can be cancelled.
Three, transition mode
When the air conditioner is in a transition season, outdoor air is in a high-temperature low-humidity state, and the temperature reduction occupies a leading position, so that the second adjusting valve 15 of the auxiliary surface air cooler 1 can be closed, the first adjusting valve 13 of the main surface air cooler 2 can be adjusted as required according to the air supply humidity condition, and low-temperature chilled water at the temperature of 7-10 ℃ enters the main surface air cooler 2 for heat exchange and then flows out of high-temperature chilled water at the temperature of about 12 ℃. And a part of high-temperature chilled water is diverted by the switching valve 14 and enters the auxiliary surface cooler 1 through the switching pipeline 16, so that the dry cooling process of the auxiliary surface cooler 1 is realized. The air after passing through the surface cooling section is mixed again to reach the corresponding air supply temperature and humidity point, so that the subsequent reheating process can be cancelled, the air supply cooling capacity is improved, and the reheating quantity is saved.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (2)
1. The utility model provides an air conditioning unit surface cooling segmentation energy-saving control system, air conditioning unit includes the surface cooler, its characterized in that: the surface cooler comprises an auxiliary surface cooler and a main surface cooler which are arranged up and down, two ports of a heat exchange coil of the main surface cooler are respectively a first refrigerant inlet and a first refrigerant outlet, two ports of the heat exchange coil pipe of the auxiliary surface air cooler are respectively a second refrigerant inlet and a second refrigerant outlet, the tail end of the main water supply pipeline is divided into two independent first branch water supply pipelines and a second branch water supply pipeline, the tail end of the first branch water supply pipeline is connected with the first refrigerant inlet, the tail end of the second branch water supply pipeline is connected with the second refrigerant inlet, the first refrigerant outlet is connected with the main water return pipeline through a first branch water return pipeline, the second refrigerant outlet is connected with the main water return pipeline through a second branch water return pipeline, a first regulating valve and a switching valve are arranged on the first branch water return pipeline, a second regulating valve is arranged on the second branch water supply pipeline, the switching valve is a three-way valve, and the third port of the switching valve is connected with the second refrigerant inlet of the auxiliary surface air cooler through.
2. The surface cooling sectional energy-saving control system of the air conditioning unit as set forth in claim 1, characterized in that: the first regulating valve and the second regulating valve are both two-way valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021840071.XU CN212805991U (en) | 2020-08-28 | 2020-08-28 | Air conditioning unit surface cooling subsection energy-saving control system |
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| CN202021840071.XU CN212805991U (en) | 2020-08-28 | 2020-08-28 | Air conditioning unit surface cooling subsection energy-saving control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739284A (en) * | 2021-08-18 | 2021-12-03 | 龙岩烟草工业有限责任公司 | Air conditioner, control method thereof, controller, air conditioning system and storage medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739284A (en) * | 2021-08-18 | 2021-12-03 | 龙岩烟草工业有限责任公司 | Air conditioner, control method thereof, controller, air conditioning system and storage medium |
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