Air-cooled cold water air conditioning unit with atomization device

Abstract

The utility model provides an air-cooled cold water air conditioning unit with an atomization device. The air-cooled cold water air conditioning unit comprises a compressor, an air-cooled condenser, an expansion valve, an evaporator, an electromagnetic valve, an atomization spraying device, an electric three-way valve and a fan. When the environment temperature is higher than a preset value, the atomization spraying device is started, water flow passes through the motor rotating at a high speed to form fog drops with extremely small particle sizes, the fog drops are fully mixed with air through the atomization spraying head and rapidly evaporated, and a large amount of heat of the air is absorbed during evaporation, so that the temperature of the air near the condenser is reduced, and the cooled air is sucked into the surfaces of the fins by the fan; and the heat exchange effect of the condenser is enhanced. Meanwhile, fog drops can be attached to the surfaces of the fins to form water films, the water films are evaporated at the high temperature of the fins, and a large amount of heat is further taken away under driving of the draught fan. Two paths of water sources are provided, namely, cold water of the unit and an external pipe network can be either selected through switching of the electric three-way valve, and a user can select and switch according to the actual situation of the site by himself / herself.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration machinery, in particular to an air-cooled cold water air conditioning unit with an atomizing device. Background Art

[0002] Air-cooled chillers are a commonly used refrigeration equipment. During the operation of existing air-cooled chillers, the outdoor air for heat dissipation is usually dry air with high temperature and low humidity, which may cause the system to have too high pressure. Especially when the ambient temperature exceeds 40°C, the unit may alarm due to excessive pressure. Excessive pressure will affect the heat exchange efficiency, resulting in high energy consumption and low overall energy efficiency of the unit. It is also easy to cause unit failure, shortening the service life and increasing costs. Even if the unit is improved, the unit will have problems such as excessive power, unsatisfactory energy efficiency ratio, and excessive noise under high exhaust pressure.

[0003] Evaporative condensing chillers have solved the above problems to a certain extent. However, new disadvantages have also emerged, such as the need to set up a separate spray water pump and the need to set up a water receiving tray at the bottom of the unit. The cooling water will have a high water loss rate during the circulation and spraying process, and it needs to be replenished regularly. Utility Model Content

[0004] The utility model provides an air-cooled cold water air conditioning unit with an atomizing device, which is used to solve the technical problems raised in the background technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A wind-cooled cold water air-conditioning unit with an atomizing device comprises a compressor, an air-cooled condenser, an expansion valve, an evaporator, a solenoid valve, an atomizing spray device and a fan; the fan is provided with at least one and is installed at the air inlet of the air-cooled condenser, the atomizing spray device is located on one side of the fan, and the spray direction is toward the air-cooled condenser; the outlet end of the compressor is connected with the first port, the second port of the air-cooled condenser, the expansion valve, the first port, the second port of the evaporator, and the inlet end of the compressor in sequence; the third port of the evaporator is connected with the solenoid valve and the atomizing spray device in sequence; and also comprises an electric three-way valve installed between the evaporator and the solenoid valve, the first port of the electric three-way valve is connected with the third port of the evaporator, the second port is connected with the atomizing spray device through the solenoid valve, and the third port is connected with a municipal pipe network.

[0007] As a further preferred embodiment of the present invention, a water inlet pipe is installed on the third port of the evaporator, and the first port of the electric three-way valve is connected to the water inlet pipe.

[0008] As a further preferred embodiment of the present invention, the evaporator is selected from one of a dry evaporator, a flooded evaporator and a falling film evaporator.

[0009] As a further preferred embodiment of the present invention, the compressor is selected from one of a scroll compressor, a screw compressor, and a centrifugal compressor.

[0010] As a further preferred embodiment of the present invention, a centrifugal atomizing disk and a motor are provided inside the atomizing spray device, the water inlet end of the centrifugal atomizing disk is connected to the third port of the electric three-way valve, a plurality of atomizing nozzles are provided at the bottom of the atomizing spray device, and the water outlet end of the centrifugal atomizing disk is connected to the atomizing nozzle.

[0011] As a further preferred embodiment of the present invention, the expansion valve is selected from a mechanical expansion valve or an electronic expansion valve.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] When the ambient temperature is higher than 40°C, the condensation temperature of the traditional fan unit is above 55°C, and the power consumption and noise of the unit are very high at this time. After the atomizing spray device is turned on, water flows through the high-speed rotating motor to form extremely small droplets, which are fully mixed with the air through the atomizing nozzle and evaporate quickly. During evaporation, a large amount of heat from the air is absorbed, thereby reducing the air temperature near the condenser. The cooled air is sucked into the fin surface by the fan, which enhances the heat exchange effect of the condenser. At the same time, the droplets will adhere to the surface of the fin to form a water film, which evaporates at the high temperature of the fin and further takes away a large amount of heat driven by the fan. During the vaporization process, the droplets can take away the dust on the surface of the condenser, playing a cleaning role.

[0014] This application sets up two water sources, namely the cold water of the unit and the external pipeline network. One of the two can be selected by switching the electric three-way valve. Users can choose and switch according to the actual situation on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention and its features, appearance and advantages will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, but the emphasis is on illustrating the subject matter of the present invention.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] In the figure, 1. compressor, 2. air-cooled condenser, 3. expansion valve, 4. evaporator, 5. solenoid valve, 6. atomizing spray device, 7. electric three-way valve, 8. fan. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described below in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work belong to the protection scope of the present invention. Example

[0019] Please refer to the attached Figure 1 The utility model provides an air-cooled cold water air conditioning unit with an atomizing device, comprising a compressor 1, an air-cooled condenser 2, an expansion valve 3, an evaporator 4, a solenoid valve 5, an atomizing spray device 6 and a fan 8. The fan 8 is provided with a, which is installed at the air inlet of the air-cooled condenser 2, the atomizing spray device 6 is located on one side of the fan 8, and the spray direction is toward the air-cooled condenser 2. The outlet end of the compressor 1 is connected to the first port and the second port of the air-cooled condenser 2, the expansion valve 3, the first port and the second port of the evaporator 4, and the inlet end of the compressor 1 in sequence. The third port of the evaporator 4 is connected to the solenoid valve 5 and the atomizing spray device 6 in sequence.

[0020] Further explanation, an electric three-way valve 7 is installed between the evaporator 4 and the solenoid valve 5, and a water inlet pipe is installed on the third port of the evaporator 4. The first port a of the electric three-way valve 7 is connected to the water inlet pipe, the second port c is connected to the atomizing spray device 6 through the solenoid valve 5, and the third port b is connected to the external pipe network. The present application sets up two water sources, namely the cold water of the unit and the external pipe network, which can be selected by switching the electric three-way valve, where a→c is the water source of the unit's cold water system, and b→c is the water source from the municipal pipe network. Users can choose and switch according to the actual situation on site.

[0021] To further explain, a centrifugal atomizing disk and a motor are provided inside the atomizing spray device 6, the water inlet end of the centrifugal atomizing disk is connected to the third port of the electric three-way valve 7, a plurality of atomizing nozzles are provided at the bottom of the atomizing spray device 6, and the water outlet end of the centrifugal atomizing disk is connected to the atomizing nozzle.

[0022] It should be understood that the atomizing spray device 6 is an existing device, and its internal structure and connection relationship have been disclosed, which will not be described in detail here.

[0023] The present application provides an air-cooled chilled water air conditioning unit with an atomizing device, including a normal mode and an atomizing mode:

[0024] Normal mode: When the ambient temperature is below 40℃, the atomizing spray device does not work. At this time, the compressor discharges high-pressure gaseous refrigerant into the air-cooled condenser, the condensed liquid refrigerant flows through the expansion valve, and the throttled low-pressure gas-liquid mixed refrigerant enters the evaporator for evaporation. The low-pressure gaseous refrigerant with a certain degree of superheat enters the compressor suction port for compression.

[0025] Atomization mode: The start and stop of the atomization spray device is controlled by the host. When the ambient temperature is higher than 40°C, the solenoid valve opens. The motor rotates at high speed, and its output shaft drives the centrifugal atomization disk to rotate at high speed. The water flow forms extremely small droplets under the action of centrifugal force and negative pressure. It is fully mixed with the air through the atomization nozzle and evaporates quickly. It absorbs a large amount of heat from the air during evaporation, thereby reducing the air temperature near the condenser. The cooled air is sucked into the fin surface by the fan, which enhances the heat exchange effect of the condenser. At the same time, the droplets will adhere to the fin surface to form a water film, which evaporates at the high temperature of the fin and further takes away a large amount of heat driven by the fan.

[0026] In addition, during the vaporization process, the mist droplets can take away the dust on the surface of the condenser, which not only plays a cleaning role, but also changes the air-conditioning system from a single air cooling to a hybrid mode of "air cooling + mist cooling".

[0027] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. An air-cooled chilled water air conditioning unit with an atomizing device, characterized in that: The invention comprises a compressor (1), an air-cooled condenser (2), an expansion valve (3), an evaporator (4), a solenoid valve (5), an atomizing spray device (6) and a fan (8); at least one fan (8) is provided and installed at the air inlet of the air-cooled condenser (2); the atomizing spray device (6) is located on one side of the fan (8), and the spray direction is toward the air-cooled condenser (2); the outlet end of the compressor (1) is connected to the first port, the second port, the expansion valve (3), the outlet end of the air-cooled condenser (2) in sequence; The first port and the second port of the evaporator (4) are connected to the inlet end of the compressor (1); the third port of the evaporator (4) is connected to the solenoid valve (5) and the atomizing spray device (6) in sequence; and an electric three-way valve (7) is also included, which is installed between the evaporator (4) and the solenoid valve (5); the first port of the electric three-way valve (7) is connected to the third port of the evaporator (4), the second port is connected to the atomizing spray device (6) through the solenoid valve (5), and the third port is connected to an external pipe network.

2. The air-cooled water-cooling air-conditioning unit with an atomizing device according to claim 1, characterized in that: A water inlet pipe is installed on the third port of the evaporator (4), and the first port of the electric three-way valve (7) is connected to the water inlet pipe.

3. The air-cooled water-cooling air-conditioning unit with an atomizing device according to claim 1, characterized in that: The evaporator (4) is a dry type / flooded type / falling film type evaporator.

4. The air-cooled water-cooling air-conditioning unit with an atomizing device according to claim 1, characterized in that: The atomizing spray device (6) is provided with a centrifugal atomizing disk and a motor inside, the water inlet end of the centrifugal atomizing disk is connected to the third port of the electric three-way valve (7), a plurality of atomizing nozzles are provided at the bottom of the atomizing spray device (6), and the water outlet end of the centrifugal atomizing disk is connected to the atomizing nozzle.

5. The air-cooled water-cooling air-conditioning unit with an atomizing device according to claim 1, characterized in that: The expansion valve (3) is a mechanical / electronic expansion valve.

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