Air conditioner refrigeration water balance energy-saving device

Abstract

The utility model discloses a refrigeration water balance energy-saving device of an air conditioner. The refrigeration water balance energy-saving device comprises a water chilling unit, a water pump and a fan coil, the water cooling unit cools circulating water, the water pump controls the flow speed of the circulating water, and air in the fan coil is cooled through the circulating water. An energy valve is further arranged in the circulating water pipeline, and a first temperature sensor and a second temperature sensor are arranged at the water inlet end and the water outlet end of the fan coil correspondingly. The first temperature sensor and the second temperature sensor are electrically connected with the energy valve; the energy valve controls the opening degree of the valve and the output flow of the water pump according to the temperature difference measured by the first temperature sensor and the second temperature sensor. The utility model aims to provide a novel air-conditioning refrigeration water balance energy-saving device which can flexibly adjust the flow rate of cold water, the power of a pump machine, the power of a water chilling unit and the like, adapt to the requirements of different seasons and different production processes on environment temperature and humidity, and simultaneously reduce the energy consumption of equipment and the production cost.

Description

Technical Field

[0001] The utility model relates to the field of central air-conditioning in clean workshops, in particular to an air-conditioning refrigeration water balancing energy-saving device. Background Art

[0002] Central air conditioning units in manufacturing plants typically use surface coolers or fan coil units (heat exchangers) for heat exchange. The air conditioning units use electricity or steam to heat up and chilled water to cool down, thereby regulating the temperature between functional rooms and achieving a comfortable room temperature. Due to the unique characteristics of production processes, raw materials, and finished products, the pharmaceutical industry has different temperature and humidity control requirements for different functional rooms in the clean and non-clean areas of the factory. Sterile products, in particular, are particularly sensitive to the temperature and humidity of the production environment, requiring even higher precision control in clean areas. Temperature and humidity requirements for functional rooms also vary depending on the season, production process, and material. Traditional heating and cooling methods, however, result in significant fluctuations in temperature and humidity between production rooms, making regulation difficult. Energy is also inefficiently utilized, resulting in high costs.

[0003] At present, the air conditioning units in the factory buildings of production enterprises use fan coil units (heat exchangers) for heat exchange and cooling. Figure 1 As shown, chilled water is cooled and stored in chiller 1 of the chiller. It is then pumped by water pump 2 to the fan coil unit 5 of the air conditioning unit for cold exchange. This cold energy is then transferred to the air conditioning unit and sent to the functional rooms for temperature regulation. Main valve 3 remains open, and the chilled water, after undergoing cold exchange through fan coil unit 5, flows back to chiller 1 for further cooling and cold storage. This cycle repeats, completing the temperature and humidity regulation of the air conditioning system. Due to the different climates in different time periods, the cooling capacity requirements of the air-conditioning unit are different; when the temperature difference before and after the chilled water passes through the fan coil 5 is small, the cooling capacity demand is low and the consumption is small, while the chiller and water pump 2 maintain the original operating frequency and power, energy waste will occur; when the temperature difference before and after the chilled water passes through the fan coil 5 is large, the cooling capacity demand is high and the consumption is large, while the chiller 1 and water pump 2 maintain the original operating frequency and power and cannot provide the cooling capacity required by the air-conditioning unit. Small or large temperature differences will affect the temperature and humidity of the clean area, which is not convenient for environmental control. HVAC personnel need to go to the site to manually modify the equipment operating frequency and power, and multiple repeated adjustments are required to effectively control the temperature and humidity of the clean area within an appropriate range.

[0004] The first valve 401 and the third valve 403 respectively control the chilled water delivery switch, flow rate, and pressure of their respective fan coil units. The first valve 401 and the third valve 403 need to be manually opened in advance according to the use of the air-conditioning unit. The valve opening is manually adjusted according to the cooling consumption demand of the fan coil unit and the pipeline pressure; the second valve 402 is opened and closed to prevent abnormal pipeline flow and pressure, thereby improving pipeline safety. Utility Model Content

[0005] The inventor believes that the air conditioning system in the prior art has the following defects:

[0006] 1. Low energy utilization rate and high energy consumption;

[0007] 2. Climate and process changes, large fluctuations in temperature and humidity;

[0008] 3. The equipment cannot adjust its operating status immediately according to the cooling demand of the clean area, which wastes electricity and increases costs.

[0009] The purpose of this utility model is to provide an air conditioning refrigeration water balance energy-saving device with a novel and unique structure, easy use, and the ability to improve the temperature and humidity control accuracy; the specific technical solution is:

[0010] An air conditioning refrigeration water balance and energy-saving device includes a water cooling unit, a water pump and a fan coil unit; the water cooling unit cools the circulating water, the water pump controls the flow rate of the circulating water, and cools the air in the fan coil unit through the circulating water; an energy valve is also provided in the circulating water pipeline, and the water inlet and outlet ends of the fan coil unit are respectively provided with a first temperature sensor and a second temperature sensor; the first temperature sensor and the second temperature sensor are electrically connected to the energy valve; the energy valve controls the valve opening and the output flow of the water pump according to the temperature difference measured by the first temperature sensor and the second temperature sensor.

[0011] Furthermore, a pressure sensor is provided at the cold water input end of the energy valve, and the pressure sensor is electrically connected to the energy valve; a balancing valve is provided between the diversion port of the energy valve and the water outlet end of the fan coil unit.

[0012] Furthermore, the motor of the water pump is controlled by a frequency converter; the water pump control signal of the energy valve is electrically connected to the frequency converter of the water pump to control the rotation speed of the variable frequency motor.

[0013] Furthermore, the motor of the chiller is controlled by a frequency converter; the chiller control signal of the energy valve is electrically connected to the frequency converter of the chiller to control the rotation speed of the variable frequency motor.

[0014] The utility model aims to provide a new air-conditioning refrigeration water balance energy-saving device, which can flexibly adjust the cold water flow rate, pump power and chiller power, etc., to adapt to the requirements of environmental temperature and humidity in different seasons and different production processes. At the same time, it can reduce equipment energy consumption and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of an air conditioning refrigeration water balance energy-saving device in the prior art;

[0016] Figure 2This is a structural diagram of the utility model air conditioning refrigeration water balance energy-saving device.

[0017] In the figure: 1. Chiller; 2. Water pump; 3. Main valve; 401. First valve; 402. Second valve; 403. Third valve; 5. Fan coil; 501. First fan coil; 502. Second fan coil; 6. Energy valve; 701. First temperature sensor; 702. Second temperature sensor; 8. Pressure sensor; 9. Balancing valve. DETAILED DESCRIPTION

[0018] The present invention is described in more detail below using embodiments. The present invention can be embodied in a variety of forms and should not be construed as being limited to the exemplary embodiments described herein.

[0019] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature shown in the figures relative to another element or feature. It should be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, if the device in the figures is inverted, an element described as being "below" another element or feature would be positioned "above" the other element or feature. Thus, the exemplary term "below" can encompass both above and below orientations. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0020] The technical solution of the present invention is implemented by a complete system, which consists of: a chiller 1 (surface cooler), a water pump 2, an energy valve 6, a fan coil 5 (heat exchanger), and a first temperature sensor 701 and a second temperature sensor 702 located at the water inlet and outlet ends of the fan coil 5, respectively.

[0021] The air conditioning refrigeration water balance energy saving device controls the valve opening of the energy valve 6 according to the temperature feedback of the first temperature sensor 701 and the second temperature sensor 702 to adjust the flow of chilled water; to adjust the temperature difference before and after the surface cooler (heat exchanger), to achieve precise control of the temperature and humidity in the clean area and save energy. Figure 2As shown, chilled water is produced by cooling water through chiller 1. Its temperature is determined by the chiller's power and cooling capacity. The chilled water is pumped by water pump 2 to the air conditioning unit's fan coil unit 5 (heat exchanger), where it undergoes heat exchange through the plates before returning to chiller 1. Energy valve 6, pressure sensor 8, first temperature sensor 701, and second temperature sensor 702 form a regulation system. During operation, energy valve 6 uses first temperature sensor 701 and second temperature sensor 702 to record the temperature of the chilled water before entering fan coil unit 5 and after the heat exchange. If the temperature difference between the front and back chilled water levels is too small, reducing the cooling capacity of the air conditioning unit, energy valve 6 automatically adjusts its valve opening to reduce the chilled water flow rate. If the temperature difference between the front and back chilled water levels is too large, increasing the cooling capacity of the air conditioning unit, energy valve 6 automatically adjusts its valve opening to increase the chilled water flow rate.

[0022] A frequency converter can also be used to control the motor speed of water pump 2. The output signal of energy valve 6 is electrically connected to the frequency converter, and the speed of water pump 2 is controlled based on the temperature feedback from the first temperature sensor 701 and the second temperature sensor 702. By instantly controlling the operating frequency of the chilled water pump, the chilled water flow rate is adjusted. When the temperature difference between the front and rear chilled water is too small, the cooling capacity of the air conditioning unit is reduced, and the energy valve 6 will reduce the speed of the water pump 2 motor, reducing the chilled water flow rate. If the temperature difference between the front and rear chilled water is too large, the cooling capacity of the air conditioning unit increases, and the energy valve 6 will increase the speed of the water pump 2 motor, increasing the chilled water flow rate.

[0023] The control signal of the energy valve 6 can also be electrically connected to the inverter of the chiller to control the operating frequency and power of the chiller and adjust the chilled water temperature. The amount of chilled water passing through the surface cooler (heat exchanger) can be controlled to adjust the temperature difference before and after the surface cooler (heat exchanger) to achieve precise control of the temperature and humidity in the clean area and save energy. Figure 2 As shown, chilled water is produced by cooling water through chiller 1. The chilled water temperature is determined by the power and cooling capacity of the chiller. The chilled water is transported to the fan coil 5 (heat exchanger) of the air conditioning unit through the water pump 2. Heat exchange is carried out through the plates in the fan coil 5 (heat exchanger) and then flows back to the chiller 1.

[0024] The energy valve 6 automatically adjusts its valve opening to control the operating frequency of the water pump 2 and the operating frequency of the chiller 1; the temperature difference before and after the chilled water passes through the fan coil 5 is controlled within a reasonable range, thereby achieving precise control of the temperature and humidity in the clean area, maintaining a suitable environment, and effectively saving energy loss of the chiller 1 and the water pump 2, reducing operating costs.

[0025] A pressure sensor 8 for measuring chilled water pressure can also be added to the cold water input of the energy valve 6. The pressure sensor 8 is electrically connected to the energy valve 6. A balancing valve 9 is installed at the diversion port of the energy valve in parallel with the fan coil unit 5. The energy valve 6, balancing valve 9, and pressure sensor 8 can regulate pipeline flow and pressure. When the chilled water flow or pressure is too high or too low, the energy valve 6 can control the opening and closing of its own valve and the opening and closing and opening and closing of the balancing valve 9, thereby controlling the chilled water flow and pressure to maintain them within an appropriate range, preventing damage to pipelines, valves, and other equipment, and improving pipeline system safety.

[0026] Through the above technical solution, the air conditioning chilled water balance energy-saving device is used to effectively control the operating frequency and power of the equipment, save equipment energy loss, adapt to climate and process changes, accurately control the temperature and humidity in the clean area, and adjust the pipeline pressure and flow of the air conditioning system's chilled water, thereby improving safety and chilled water utilization, and solving the shortcomings of the original technology.

[0027] Beneficial effects of this program:

[0028] 1. Improve energy utilization and reduce energy consumption;

[0029] 2. Adapt to climate and process changes and control appropriate temperature and humidity;

[0030] 3. The equipment operates at variable frequency to reduce costs.

[0031] The above examples are only used to illustrate the present invention. In addition, there are many different implementation methods. These implementation methods are all conceivable by those skilled in the art after understanding the concept of the present invention. Therefore, they are not listed here one by one.

Claims

1. An air conditioning refrigeration water balance energy-saving device, comprising a water cooling unit, a water pump, and a fan coil unit; the water cooling unit cools circulating water, the water pump controls the flow rate of the circulating water, and the circulating water cools the air in the fan coil unit; characterized in that: An energy valve is also provided in the circulating water pipeline, and a first temperature sensor and a second temperature sensor are respectively provided at the water inlet and outlet ends of the fan coil unit; the first temperature sensor and the second temperature sensor are electrically connected to the energy valve; the energy valve controls the valve opening and the output flow of the water pump according to the temperature difference measured by the first temperature sensor and the second temperature sensor.

2. The air conditioning refrigeration water balance energy-saving device according to claim 1, characterized in that: A pressure sensor is provided at the cold water input end of the energy valve, and the pressure sensor is electrically connected to the energy valve; a balancing valve is provided between the diversion port of the energy valve and the water outlet end of the fan coil unit.

3. The air conditioning refrigeration water balance energy-saving device according to claim 1, characterized in that: The motor of the water pump is controlled by a frequency converter; the water pump control signal of the energy valve is electrically connected to the frequency converter of the water pump to control the rotation speed of the motor.

4. The air conditioning refrigeration water balance energy-saving device according to claim 1, characterized in that: The motor of the water cooling unit is controlled by a frequency converter; the water cooling unit control signal of the energy valve is electrically connected to the frequency converter of the water cooling unit to control the rotation speed of the motor.

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