CN202119028U - Evaporative cooling closed high-temperature cold water machine set with mechanical refrigeration as auxiliary cold source - Google Patents

Abstract

The utility model discloses an evaporative cooling closed-type high-temperature chiller with mechanical refrigeration as an auxiliary cold source, including an evaporative cooling closed-type chiller and a mechanical refrigeration water-cooled chiller connected through a pipe network, and the evaporative cooling closed-type chiller includes The air inlet, filter, tube-type indirect evaporative cooler and evaporative cooling coil are arranged in sequence in the direction of the primary air, and the secondary air duct is set between the tube-type indirect evaporative cooler and the evaporative cooling coil; mechanical refrigeration water-cooled chilled water The unit is composed of a condenser, a throttling mechanism, an evaporator and a compressor that form a closed circuit. The chiller of the utility model can be operated independently to produce high-temperature cold water. When the whole machine is running, mechanical refrigeration is used as an auxiliary cold source, and the mechanical refrigeration water-cooled chiller is used to produce high-temperature cold water at the end of sensible heat, and the evaporative cooling closed-type chiller The cooling water is produced for the condenser, not only the water quality is guaranteed, but also the energy saving effect is more obvious.

Description

Evaporative cooling closed-type high-temperature chiller with mechanical refrigeration as auxiliary cold source

technical field

The utility model belongs to the technical field of air-conditioning and refrigeration, and in particular relates to a high-temperature chiller composed of an evaporative cooling closed-type chiller and a mechanical refrigeration water-cooled chiller.

Background technique

When the evaporative cooling air-conditioning technology is combined with the mechanical refrigeration air-conditioning technology to produce high-temperature cold water at 16-18°C, the existing form is the combination of the evaporative cooling open-type chiller and the mechanical refrigeration low-temperature chiller. Moreover, the water quality cannot be guaranteed; there is a combination of evaporative cooling closed-type chillers and mechanical refrigeration low-temperature chillers. Although the water quality is guaranteed in this form, there is still a link of offsetting cold and heat that does not save energy; there are also evaporative cooling open-type chillers. Combining with mechanical refrigeration and high-temperature chillers, this form solves the problem of offsetting cold and heat and not saving energy, but there are still water quality problems. At the same time, in some combined forms, the cold exhaust air with a lower temperature in the evaporative cooling section has not been well utilized.

Contents of the invention

The purpose of this utility model is to provide an evaporative cooling closed-type high-temperature water chiller with mechanical refrigeration as an auxiliary cold source. The evaporative cooling closed-type water-cooled chiller is combined with the mechanical refrigeration water-cooled water-cooled water chiller to produce high-temperature cold water for the end of sensible heat. , the entire waterway is closed, so that the water quality is guaranteed, and compared with the existing high-temperature chiller, the energy-saving effect is more obvious.

The technical solution adopted by the utility model is that the evaporative cooling closed-type high-temperature chiller with mechanical refrigeration as the auxiliary cold source includes the evaporative cooling closed-type chiller and the mechanical refrigeration water-cooled chiller connected through the pipe network,

The structure of the evaporative cooling closed-type chiller: including the air inlet, the filter, the tube indirect evaporative cooler and the evaporative cooling coil arranged in sequence according to the direction of the primary air, and the tube indirect evaporative cooler and the evaporative cooling coil are arranged The secondary air duct is used to transport the exhaust air from the evaporative cooling coil to the tube-type indirect evaporative cooler as the secondary air, and the secondary air duct is used as the secondary air inlet. In the wet channel of the indirect evaporative cooler, the secondary air and the spray water perform downstream heat and moisture exchange,

The mechanical refrigeration water-cooled chiller is composed of a condenser, a throttling mechanism, an evaporator and a compressor that form a closed circuit.

The utility model is also characterized in that,

The condenser is connected to the water inlet and outlet of the evaporative cooling coil in turn through pipes to form a loop, and a valve a is set on the water inlet pipe of the condenser and the evaporative cooling coil; the evaporator connects the sensible heat end through the pipe A loop is formed, and a valve b is set on the pipeline between the water outlet of the evaporator and the water inlet of the sensible heat end; the evaporative cooling coil forms a loop through the pipeline and the sensible heat end, and the water outlet of the evaporative cooling coil and the sensible heat end Set valve c on the pipeline between the ends, and set valve d on the pipeline between the water inlet of the evaporative cooling coil and the sensible heat end.

The tube-type indirect evaporative cooler includes a heat exchange tube family composed of multiple heat exchange tubes, a water distributor a set above the heat exchange tube family, and a water tank a set below the heat exchange tube family. The water tank a passes through the pipes and the water pump a is connected to the water distributor a.

The evaporative cooling coil includes a cooling coil, a fan, a water baffle, a water distributor b arranged above the cooling coil, and a water tank b arranged below the cooling coil. The water tank b is connected to the water pump b and the water distributor b through pipelines connect.

Mechanical refrigeration water-cooled chillers are screw, centrifugal or piston chillers.

The beneficial effect of the utility model chiller is:

1) The exhaust air at the evaporative cooling coil of the evaporative cooling closed-type chiller is used as the secondary air of the tubular indirect evaporative cooler, and the purpose is to recycle the exhaust air with a lower temperature to pre-cool the outdoor air; In the wet channel of the evaporative cooler, the secondary air and the spray water carry out heat and moisture exchange along the flow, so as to avoid the damage of the water film under the heat exchange tube by the secondary air during the countercurrent flow in the past and affect the cooling effect of the primary air.

2) The water circuit of the whole unit adopts closed circulation to ensure that the circulating water will not be polluted by outdoor air and block the sensible heat terminal, evaporator and other water circuit links.

3) Compared with the traditional method of mechanical refrigeration (frozen water temperature 7-12 ℃) to produce high-temperature cold water, the chiller of the utility model does not have the useless energy consumption caused by the offset of cold and hot water when cold water and hot water are mixed, Moreover, when the outdoor air meets the requirements (only evaporative cooling closed-type chiller can produce high-temperature cold water below 18°C), the evaporative-cooling closed-type chiller can be operated alone to produce high-temperature cold water for the end of sensible heat, making this practical The energy-saving effect of the new chiller is particularly obvious.

4) Compared with the production of high-temperature cold water by using a mechanical refrigeration high-temperature chiller alone, since the chiller of the utility model uses mechanical refrigeration as an auxiliary cold source, it can be used alone when the outdoor air meets the requirements during the operation of the air conditioner. Using the evaporative cooling chiller to produce high-temperature cold water, the longer the outdoor air meets the requirements, the more energy-saving the chiller of the utility model will be.

5) When the chiller of the utility model is running as a whole, the evaporative cooling chiller plays the role of a traditional cooling tower, but is superior to the traditional cooling tower. Because the traditional cooling towers for producing cooling water are all open, the water quality is easily polluted, and the minimum temperature of the cooling water produced by it is higher than the wet bulb temperature of the outdoor air by a cold range, while the evaporation in the chiller of the utility model The cooling closed-type chiller adopts a closed system, the water quality is guaranteed and the water temperature is low, which can improve the condensation efficiency of the condenser.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of the utility model chiller;

Fig. 2 is a top view of the utility model chiller;

Fig. 3 is the water flow diagram when the utility model chiller complete machine runs;

Fig. 4 is the water flow diagram of the evaporative cooling closed-type chiller for the utility model chiller operating alone.

In the figure, 1 air inlet, 2 filter, 3 water distributor a, 4 deflector, 5 secondary air duct, 6 fan, 7 water baffle, 8 water distributor b, 9 evaporative cooling coil, 10 Water tank b, 11 Water pump b, 12 Water pump a, 13 Water tank a, 14 Tube type indirect evaporative cooler, 15 Throttle mechanism, 16 Condenser, 17 Compressor, 18 Evaporator, 19 Water pump c, 20 Valve c, 21 Valve b, 22 water pump d, 23 sensible heat end, 24 valve d, 25 valve a, 26 secondary air outlet.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a structural diagram of an embodiment provided by the utility model in which an evaporative cooling chiller and a mechanical refrigeration chiller are arranged in one unit casing. The evaporative cooling closed-type chiller and the mechanical refrigeration water-cooled chiller are connected through a pipe network.

The evaporative cooling closed-type chiller includes an air inlet 1, a filter 2, a tube-type indirect evaporative cooler 14 and an evaporative cooling coil 9 arranged in sequence according to the direction of the primary air, and a tube-type indirect evaporative cooler 14 and an evaporative cooling coil 9 A secondary air duct 5 is arranged between them, so that the exhaust air from the evaporative cooling coil 9 is transported to the tubular indirect evaporative cooler 14 as the secondary air, and the secondary air duct 5 is used as the port of the secondary air inlet. Flow plate 4, in the wet channel of the tubular indirect evaporative cooler 14, the secondary air and the spray water perform downstream heat and moisture exchange, and the low-temperature exhaust air at the evaporative cooling coil is transported through the secondary air duct The secondary air inlet to the tube-type indirect evaporative cooler is used as the secondary air, and a deflector is set at the secondary air inlet to play the role of flow equalization.

The tubular indirect evaporative cooler 14 includes a heat exchange tube family composed of multiple heat exchange tubes, a water distributor a3 arranged above the heat exchange tube family, and a water tank a13 arranged below the heat exchange tube family. The water tank a13 passes through the pipe and the water pump a12 Connect with water distributor a3.

Mechanical refrigeration water-cooled chillers can use screw, centrifugal or piston chillers. It consists of a condenser 16, a throttling mechanism 15, an evaporator 18 and a compressor 17 forming a closed circuit. The evaporative cooling coil 9 includes a cooling coil, a fan 6 arranged in sequence above the cooling coil, a water baffle 7, a water distributor b8, and a water tank b10 arranged below the cooling coil. The water tank b10 communicates with the water pump b11 and the water distributor through pipelines b8 connection.

The pipe network between them is set as follows: the condenser 16 is connected to the water inlet and water outlet of the evaporative cooling coil 9 in turn through pipes to form a circuit, and the valve a25 is set on the water inlet pipe of the condenser 16 and the evaporative cooling coil 9 ; The evaporator 18 forms a loop through the pipeline and the sensible heat terminal 23, and a valve b21 is set on the pipeline between the water outlet of the evaporator 18 and the water inlet of the sensible heat terminal 23; the evaporative cooling coil 9 passes through the pipeline and the sensible heat terminal 23 To form a circuit, a valve c20 is set on the pipeline between the water outlet of the evaporative cooling coil 9 and the sensible heat end 23, and a valve d24 is set on the pipeline between the water inlet of the evaporative cooling coil 9 and the sensible heat end 23.

The chiller unit of the utility model combines the evaporative cooling closed-type chiller unit and the mechanical refrigeration water-cooled chiller unit. During the operation of the air conditioner, using their respective advantages, when the outdoor air meets the requirements, the evaporative cooling closed-type chiller is operated separately The unit produces high-temperature cold water at 16-18°C for the sensible heat end; when the weather is not suitable, the whole machine runs, and the mechanical refrigeration high-temperature chiller produces high-temperature cold water for the sensible heat end, and the evaporative cooling closed-type chiller acts as a traditional cooling tower The role of the condenser to provide cooling water.

The flow of outside air inside the unit:

Under the action of the fan 6, the outdoor air passes through the filter 2, the dry channel of the tubular indirect evaporative cooler 14, the evaporative cooling coil 9, the water distributor b8 and the water baffle 7, and then is transported through the secondary air duct 5 To the secondary air inlet of the tube-type indirect evaporative cooler 14 , after passing through the deflector 4 for equal flow, it performs downstream heat and moisture exchange with the spray water of the water distributor a3 , and finally discharges from the secondary air exhaust port 26 .

Fig. 3 shows the water process of the utility model chiller when the whole machine runs in summer:

The outdoor air does not meet the requirements during the operation of the air conditioner. When the whole machine is running, valve a25 and valve b21 are opened, valve c20 and valve d24 are closed, and the high-temperature cold water produced by the evaporative cooling closed-type chiller is used as the cooling water of the mechanical refrigeration chiller. Under the action of water pump c19, it is transported to the condenser 16 through pipelines, and then returns to the evaporative cooling coil 9 to circulate in this way; the high-temperature cold water produced by mechanical refrigeration is transported from the evaporator 18 to the end of sensible heat 23 through pipelines under the action of water pump d22 Undertake the sensible heat load in the room, and then return to the evaporator 18 so that it circulates.

Fig. 4 has shown the water process when the chiller of the utility model operates the evaporative cooling closed-type chiller alone:

During the operation of the air conditioner, the outdoor air meets the requirements. When the evaporative cooling closed-type chiller is operated alone, the valve a25 and valve b21 are closed, and the valve c20 and valve d24 are opened. The high-temperature cold water produced by the evaporative cooling closed-type chiller passes through under the action of the water pump 19 The pipeline is transported to the sensible heat end 23 to bear the sensible heat load in the room, and then returns to the evaporative cooling coil 9 for heat release, and so on.

Claims (5)

1. be the evaporative cooling enclosed high temperature cold water unit of auxiliary cold source with mechanical refrigeration, it is characterized in that, comprise the evaporative cooling enclosed handpiece Water Chilling Units and the mechanical refrigeration water-cooled handpiece Water Chilling Units that are connected through pipe network,

The structure of said evaporative cooling enclosed handpiece Water Chilling Units: comprise the air inlet (1), filter (2), tube type indirect evaporative cooler (14) and the evaporative cooling coil pipe (9) that set gradually by wind approach axis; Between said tube type indirect evaporative cooler (14) and the evaporative cooling coil pipe (9) secondary wind airduct (5) is set; Make the air draft of evaporative cooling coil pipe (9) be transported to tube type indirect evaporative cooler (14) as secondary wind; Said secondary wind airduct (5) is provided with deflector (4) as the port of secondary wind air inlet; Make in the wet channel of tube type indirect evaporative cooler (14); Secondary wind and shower water carry out the wet exchange of following current heat

Said mechanical refrigeration water-cooled handpiece Water Chilling Units is made up of the condenser that constitutes the closed-loop path (16), throttle mechanism (15), evaporimeter (18) and compressor (17).

2. according to the described high temperature cold water unit of claim 1; It is characterized in that; Described condenser (16) is connected with delivery port with the water inlet of evaporative cooling coil pipe (9) through pipeline successively; Constitute a loop, condenser (16) is provided with valve a (25) with the water inlet pipeline of evaporative cooling coil pipe (9); Described evaporimeter (18) constitutes a loop through pipeline and sensible heat terminal (23), on the pipeline between the water inlet of evaporimeter (18) delivery port and sensible heat terminal (23), valve b (21) is set; Described evaporative cooling coil pipe (9) constitutes a loop through pipeline and sensible heat terminal (23); On the pipeline valve c (20) is being set between the delivery port of evaporative cooling coil pipe (9) and the sensible heat terminal (23), between the water inlet of evaporative cooling coil pipe (9) and sensible heat end (23), on the pipeline valve d (24) is being set.

3. according to claim 1 or 2 described high temperature cold water units; It is characterized in that; Described tube type indirect evaporative cooler (14) comprises the water tank a (13) of the heat exchanger tube family of many heat exchanger tubes compositions, the water-locator a (3) that reaches the top setting of heat exchanger tube family, the below setting of heat exchanger tube family, and water tank a (13) passes through pipeline and is connected with water-locator a (3) with water pump a (12).

4. according to claim 1 or 2 described high temperature cold water units; It is characterized in that; Described evaporative cooling coil pipe (9) comprises cooling coil, and the water tank b (10) that is provided with of cooling coil the top blower fan (6), water fender (7), water-locator b (8), the cooling coil below that set gradually, and water tank b (10) is connected with water-locator b (8) with water pump b (11) through pipeline.

5. according to claim 1 or 2 described high temperature cold water units, it is characterized in that described mechanical refrigeration water-cooled handpiece Water Chilling Units is screw, centrifugal or reciprocation chiller group.

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