Efficient and energy-saving indirect heat exchange unit with air-air heat exchanger

Abstract

The utility model discloses an efficient and energy-saving indirect heat exchange unit with an air-air heat exchanger, and relates to the technical field of heat exchange units. The air-to-air heat exchanger comprises an air-to-air heat exchanger body, a water replenishing device and a condenser, the water replenishing device is connected with a water storage tank, the water storage tank is connected with an evaporator cold water pump and an evaporation cold drainage device, and the evaporator cold water pump is connected with an evaporation cold spraying device; the condenser is connected with a fluorine system throttle valve, the fluorine system throttle valve is connected with an evaporator, the evaporator is connected with a fluorine system compressor, and a branch pipe is connected between the fluorine system compressor and the condenser. The indoor bypass electric air valve is additionally arranged on the indirect evaporation cooling unit, under the conditions that the outdoor temperature is low and the rotating speed of the outdoor fan is not high, the indoor bypass electric air valve is opened, indoor return air is partially bypassed, the rotating speed of the outdoor fan is increased, the power of the indoor fan is reduced, and the indoor fan and the outdoor fan operate in a balanced mode; the operation efficiency of the fan is improved, and the whole-year operation energy efficiency of the whole machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of heat exchange unit, especially, relate to a kind of indirect heat exchange unit of high-efficiency energy-saving with air-to-air heat exchanger. BACKGROUND

[0002] With the rapid development of data center, server power density is more and more big, the energy consumption requirement of data center is also more and more high, wherein refrigeration system accounts for about 40% of the energy consumption of entire data center, and reducing the energy consumption of data center refrigeration system is imminent.Indirect evaporative cooling is applied by most current data centers due to its high efficiency, energy saving, integration of indoor and outdoor units, and rapid reduction of construction period. The existing indirect evaporative cooling equipment in the prior art saves energy in fluorine system design, air-to-air heat exchanger design, and device selection. It designs to reduce power consumption and save energy from energy consumption devices such as compressors, water pumps, and outdoor fans. However, the cost and performance cannot be balanced. INVENTION CONTENTS

[0003] Based on the above deficiencies of the prior art, the technical problem solved by the utility model is to provide a high-efficiency energy-saving indirect heat exchange unit with an air-to-air heat exchanger. The indoor return air is partially bypassed, the outdoor fan speed is increased, the indoor fan power is reduced, the indoor and outdoor fans are balanced, the fan operating efficiency is improved, and the annual operating energy efficiency of the entire machine is improved.

[0004] To solve the above technical problems, the utility model realizes the following technical scheme: the utility model provides a kind of high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger, comprising: air-to-air heat exchanger body, water supplement device and condenser;The water supplement device is connected with water storage tank, and the water storage tank is connected with evaporator cold water pump and evaporative cooling drainage device, and the evaporator cold water pump is connected with evaporative cooling spray device;The condenser is connected with fluorine system throttle valve, and the fluorine system throttle valve is connected with evaporator, and the evaporator is connected with fluorine system compressor, and branch pipe is connected between fluorine system compressor and condenser;One side of branch pipe is provided with air supply fan, and one side of condenser is provided with condensing fan;The two sides of air-to-air heat exchanger body are provided with indoor bypass electric air valve.

[0005] Optionally, the water storage tank, evaporator and evaporative cooling spray device are arranged on the side of the air-to-air heat exchanger body.

[0006] Optionally, the water storage tank and the evaporative cooling spray device are arranged on opposite sides of the air-to-air heat exchanger body, and the evaporator is arranged on one side of the air-to-air heat exchanger body.

[0007] Optionally, the air supply fan operates and generates indoor air supply on one side, and one side of the air-to-air heat exchanger body is provided with indoor return air.

[0008] Optionally, one side of the air-to-air heat exchanger body close to the water storage tank is provided with outdoor air inlet.

[0009] Optionally, the indoor bypass electric air valve and the evaporator are provided with mixed air generated by mixing indoor return air and outdoor inlet air.

[0010] The indoor bypass electric air valve is provided with a control system, and the specific control method comprises the following stages:

[0011] The first stage: detecting the outdoor environment temperature and the outdoor fan speed, and judging, if the outdoor environment temperature and the outdoor fan speed are less than the first threshold value set in advance, it is determined that the running state is not economical, the outdoor fan is improved, and the indoor fan speed is reduced to balance the indoor and outdoor fan power, improve the energy efficiency, and open the indoor bypass electric air valve.

[0012] The second stage: after the indoor bypass electric air valve is opened, the indoor supply air temperature is detected, and judged, if the indoor supply air temperature is less than the second threshold value set in advance, it is determined that the natural cooling provided by the outdoor fan is large, the resistance of the air-air heat exchanger body is reduced by bypassing part of the indoor return air, and the power of the indoor supply fan is reduced.

[0013] The third stage: detecting the indoor supply air temperature, and judging, if the indoor supply air temperature is equal to the third threshold value set in advance, the current running state is maintained.

[0014] Optionally, in the first stage, if the outdoor environment temperature and the outdoor fan speed are greater than the first threshold value set in advance, the closed state is maintained.

[0015] Optionally, in the second stage, if the indoor supply air temperature is greater than and / or equal to the second threshold value set in advance, the opening of the indoor bypass electric air valve is closed.

[0016] Optionally, in the third stage, if the indoor supply air temperature is not equal to the third threshold value set in advance, it is re-entered into the second stage.

[0017] After the above technical scheme is adopted, the utility model has the following beneficial effects compared with the prior art:

[0018] The utility model adds the indoor bypass electric air valve on the indirect evaporative cooling unit, under the condition that the outdoor low temperature and the outdoor fan speed are not high, the indoor return air is partially bypassed by opening the indoor bypass electric air valve, the outdoor fan speed is improved, the indoor fan power is reduced, the indoor and outdoor fans are balanced, the running efficiency of the fan is improved, and the annual running energy efficiency of the whole machine is improved.

[0019] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will be combined with preferred embodiments, and the drawings will be described in detail as follows. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the present application, the drawings of the embodiments will be briefly introduced as follows.

[0021] Fig. 1 The structure schematic diagram of the indirect heat exchange unit of the air-to-air heat exchanger;

[0022] Fig. 2 The top view structure schematic diagram of the indirect heat exchange unit of the air-to-air heat exchanger;

[0023] Fig. 3 The schematic diagram of the control system.

[0024] Among them, 1-fluorine system throttle valve, 2-condensing fan, 3-condenser, 4-evaporative cooling spray device, 5-evaporative cooling water pump, 6-evaporative cooling drainage device, 7-water storage tank, 8-water supply device, 9-fluorine system compressor, 10-evaporator, 11-fan, 12-air-to-air heat exchanger body, 13-indoor return air, 14-indoor supply air, 15-outdoor air inlet, 16-indoor bypass electric air valve, 17-mixing air. DETAILED DESCRIPTION

[0025] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are part of the present specification, and the principles of the application are illustrated by the embodiments, and other aspects, features and advantages of the present application will become apparent through the detailed description. In the referred drawings, the same or similar components in different drawings are denoted by the same reference numerals.

[0026] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are part of the present specification, and the principles of the application are illustrated by the embodiments, and other aspects, features and advantages of the present application will become apparent through the detailed description. In the referred drawings, the same or similar components in different drawings are denoted by the same reference numerals. Figs. 1-3 The specific structure of the high-efficiency energy-saving air-to-air heat exchanger indirect heat exchange unit of the present application is described.

[0027] As Figs. 1-3 Indicated, the high-efficiency energy-saving air-to-air heat exchanger indirect heat exchange unit of the present application comprises: air-to-air heat exchanger body 12, water supply device 8 and condenser 3.

[0028] Among them, the water storage tank 7 is connected with the water supply device 8, the evaporative cooling water pump 5 and the evaporative cooling drainage device 6 are connected with the water storage tank 7, and the evaporative cooling spray device 4 is connected with the evaporative cooler water pump 5.

[0029] The condenser 3 is connected with a fluorine system throttle valve 1, the fluorine system throttle valve 1 is connected with an evaporator 10, the evaporator 10 is connected with a fluorine system compressor 9, and the fluorine system compressor 9 is connected with the condenser 3 through a branch pipe. One side of the branch pipe is provided with a supply fan 11, and one side of the condenser 3 is provided with a condensing fan 2; both sides of the air-to-air heat exchanger body 12 are provided with indoor bypass electric air valves 16.

[0030] As shown in Fig. 1-2 , the water storage tank 7, the evaporator 10 and the evaporative cooling spraying device 4 of the embodiment are arranged on the circumferential side of the air-to-air heat exchanger body 12.

[0031] As shown in Fig. 1-2 , the water storage tank 7 and the evaporative cooling spraying device 4 of the embodiment are arranged on the opposite sides of the air-to-air heat exchanger body 12, and the evaporator 10 is arranged on one side of the air-to-air heat exchanger body 12.

[0032] As shown in Fig. 1-2 , the supply fan 11 of the embodiment runs and generates indoor air supply 14 on one side, and one side of the air-to-air heat exchanger body 12 is provided with indoor return air 13.

[0033] As shown in Fig. 1-2 , one side of the air-to-air heat exchanger body 12 of the embodiment is provided with outdoor air inlet 15 close to the water storage tank 7.

[0034] As shown in Fig. 1-2 , the indoor bypass electric air valve 16 of the embodiment is provided with mixed air 17 generated by mixing indoor return air 13 and outdoor air inlet 15 between the indoor bypass electric air valve 16 and the evaporator 10.

[0035] As shown in Fig. 3 , the indoor bypass electric air valve 16 of the embodiment is provided with a control system, and the specific control method includes the following stages:

[0036] The first stage: detecting the outdoor environment temperature and the outdoor fan speed, and judging, if the outdoor environment temperature and the outdoor fan speed are less than the first threshold value set in advance, it is determined that the running state is not economical, the outdoor fan is improved, the indoor fan speed is reduced, the indoor and outdoor fan power is balanced to improve the energy efficiency, and the indoor bypass electric air valve 16 is opened; wherein, if the outdoor environment temperature and the outdoor fan speed are greater than the first threshold value set in advance, the closed state is maintained, and the first threshold value includes that the 100% natural cooling temperature is set to 16℃, and the outdoor fan speed is 50%;

[0037] The second stage: after the indoor bypass electric air valve 16 is opened, the temperature of the indoor air supply 14 is detected, and it is judged that if the temperature of the indoor air supply 14 is less than the second threshold value set in advance, it is determined that the natural cooling provided by the outdoor fan is large, and the resistance of the air-air heat exchanger body 12 is reduced by bypassing part of the indoor return air 13 to reduce the power of the indoor air supply fan 11; wherein, if the temperature of the indoor air supply 14 is greater than and / or equal to the second threshold value set in advance, the opening of the indoor bypass electric air valve 16 is closed, and the second threshold value includes that the indoor air supply temperature setting temperature is 24℃-3℃.

[0038] The third stage: the temperature of the indoor air supply 14 is detected, and it is judged that if the temperature of the indoor air supply 14 is equal to the third threshold value set in advance, the current operating state is maintained; wherein, if the temperature of the indoor air supply 14 is not equal to the third threshold value set in advance, it reenters the second stage, and the third threshold value includes that the indoor air supply temperature setting temperature is 24℃±1℃.

[0039] The utility model discloses an indoor bypass electric air valve 16 is added on the indirect evaporative cooling unit, under the condition that the outdoor low temperature and the outdoor fan speed are not high, the indoor return air 13 is partially bypassed by opening the indoor bypass electric air valve 16, the outdoor fan speed is improved, the indoor fan power is reduced, the indoor and outdoor fan balanced operation is made, the operation efficiency of fan is improved, and the whole machine annual operation energy efficiency is improved.

[0040] The above is the preferred embodiment of the utility model, of course, cannot be used to limit the right range of the utility model, it should be pointed out, for ordinary skilled person in the art, under the premise of not departing from the principle of the utility model, can also make a number of improvements and changes, these improvements and changes are also regarded as the protection scope of the utility model.

Claims

1. A high-efficiency and energy-saving indirect heat exchange unit with an air-to-air heat exchanger, characterized in that, include: Air-to-air heat exchanger body (12), water supply device (8) and condenser (3); The water replenishment device (8) is connected to a water storage tank (7), the water storage tank (7) is connected to an evaporator cold water pump (5) and an evaporator cold drainage device (6), and the evaporator cold water pump (5) is connected to an evaporator cold spray device (4). The condenser (3) is connected to a fluorine system throttle valve (1), the fluorine system throttle valve (1) is connected to an evaporator (10), the evaporator (10) is connected to a fluorine system compressor (9), and a branch pipe is connected between the fluorine system compressor (9) and the condenser (3). A blower (11) is installed on one side of the branch pipe, and a condenser fan (2) is installed on one side of the condenser (3); Both sides of the air-to-air heat exchanger body (12) are equipped with indoor bypass electric air valves (16).

2. The high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger as described in claim 1, characterized in that, The water storage tank (7), evaporator (10) and evaporative cold spray device (4) are arranged around the air-to-air heat exchanger body (12).

3. The high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger as described in claim 2, characterized in that, The water storage tank (7) and the evaporative cold spray device (4) are located on opposite sides of the air-to-air heat exchanger body (12), and the evaporator (10) is located on one side of the air-to-air heat exchanger body (12).

4. The high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger as described in claim 1, characterized in that, The blower (11) operates and generates indoor air supply (14) on one side, and indoor return air (13) is provided on one side of the air-to-air heat exchanger body (12).

5. The high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger as described in claim 4, characterized in that, The air-to-air heat exchanger body (12) has an outdoor air inlet (15) on the side near the water storage tank (7).

6. The high-efficiency energy-saving indirect heat exchange unit with air-to-air heat exchanger as described in claim 4, characterized in that, The indoor bypass electric air valve (16) and the evaporator (10) are provided with mixed air (17) generated by the mixing of indoor return air (13) and outdoor intake air (15).

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