Atomization cooling unit of ethylene glycol heat recovery system using condensate water

Abstract

The utility model discloses a glycol heat recovery system atomization cooling unit using condensate water, and relates to the technical field of air conditioner heat recovery. The atomization cooling unit of the ethylene glycol heat recovery system comprises a water collector used for collecting condensate water and a water tank, and further comprises an atomizer used for spraying water mist to an exhaust side heat recovery coil pipe, and the atomizer and the water tank are in transition connection through a connecting pipeline and a supercharger. According to the ethylene glycol heat recovery system, the condensate water generated in the fresh air system and the ethylene glycol heat recovery system is collected, and the condensate water is atomized and sprayed to the exhaust side heat recovery coil pipe in the ethylene glycol heat recovery system, so that the temperature of an ethylene glycol solution in the exhaust side heat recovery coil pipe can be effectively reduced, and the heat exchange efficiency of the ethylene glycol heat recovery system is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to air conditioning heat recovery technical field, concretely is a kind of glycol heat recovery system atomization cooling unit using condensate water. BACKGROUND

[0002] Fresh air handling unit is often needed to send new air into room after dehumidification and cooling by fresh air handling unit surface cooler under the outdoor humid condition, and a large amount of low-temperature condensate water is generated in the process of surface cooler dehumidification, and the condensate water generated by air conditioner is generally not collected but freely discharged, for example: when fresh air volume is 20000m 3 / h, 300 kilograms of condensate water will be generated in one hour, and the more the condensate water generated, the more waste.

[0003] As Figure 1 Indicated, glycol heat recovery is a heat recovery form arranged between fresh air handling unit and exhaust air handling unit, utilizes the temperature difference between outdoor fresh air and indoor exhaust air, and drives heat exchange medium to circulate between fresh air heat exchanger and exhaust air heat exchanger by circulating pump, so as to realize exhaust air energy recovery and achieve the purpose of energy saving and consumption reduction, and a large amount of low-temperature condensate water is also generated when heat recovery coil located in fresh air air conditioner box is heat exchanged with fresh air, but in summer, when indoor temperature and indoor and outdoor temperature difference are certain, the efficiency of glycol heat recovery system tends to be in a certain range, and if further improving efficiency is needed, external input must be used. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of glycol heat recovery system atomization cooling unit using condensate water, by collecting condensate water generated in fresh air system and glycol heat recovery system, and condensate water is atomized and sprayed to exhaust air side heat recovery coil in glycol heat recovery system, the temperature of glycol solution in exhaust air side heat recovery coil can be effectively reduced, and the heat exchange efficiency of glycol heat recovery system is increased.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of glycol heat recovery system atomization cooling unit using condensate water, including water collector for collecting condensate water and water tank, further including the atomizer that water mist is sprayed to exhaust air side heat recovery coil, the atomizer is transitionally connected between water tank by connecting pipeline and booster.

[0006] Preferably, the water collector is a tray-shaped water collection container, and the tray-shaped water collector is provided with a water outlet, and the water outlet is communicated with the water tank through the connecting pipeline.

[0007] Preferably, the water tank is connected with a water supplement source through the connecting pipeline.

[0008] Preferably, the water tank is also provided with a liquid level meter for monitoring the water level inside the water tank.

[0009] Preferably, the temperature and humidity sensor for monitoring the temperature and humidity inside the fresh air air conditioning tank and the exhaust air air conditioning tank is also included.

[0010] Preferably, the PLC controller for monitoring and controlling the liquid level meter, the temperature and humidity sensor, the electromagnetic valve and the supercharger is also included, and the liquid level meter, the temperature and humidity sensor, the electromagnetic valve and the supercharger are electrically connected with the PLC.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1. The atomization cooling unit of the utility model collects the condensate water generated in the fresh air system and the glycol heat recovery system, and sprays the condensate water to the exhaust air side heat recovery coil pipe in the glycol heat recovery system, so that the glycol solution temperature in the exhaust air side heat recovery coil pipe can be effectively reduced, and the heat exchange efficiency of the glycol heat recovery system is increased.

[0013] 2. The atomization cooling unit of the glycol heat recovery system of the utility model is provided with a water supplement source, the parameter of the liquid level meter in the water tank is automatically monitored by the system, when the condensate water generated by the fresh air unit is insufficient, water can be supplemented from the outside to the water tank, so that the whole system can stably operate.

[0014] 3. The start of the condensate water recycling is based on the outdoor fresh air temperature and humidity parameter detected by the temperature and humidity sensor in the fresh air air conditioning tank, compared with the PLC system setting value, when the fresh air parameter temperature and humidity are greater than the PLC setting value, the system starts, that is, the PLC controls the supercharger to start pressurizing, and sprays the condensate water to the exhaust air side heat recovery coil pipe, otherwise, the system is closed, so that whether the condensate water is generated can be automatically identified by the atomization cooling unit, and the atomization cooling of the condensate water is automatically controlled. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure diagram of the existing glycol heat recovery system.

[0016] Figure 2 It is a setting mode diagram of the atomization cooling unit of the glycol heat recovery system of the utility model.

[0017] Figure 3 It is an electrical connection schematic diagram between the liquid level meter, the temperature and humidity sensor, the electromagnetic valve and the supercharger and the PLC.

[0018] In the drawing:

[0019] 11 - fresh air air conditioning box, 12 - fresh air filter, 13 - fresh air side heat recovery coil, 14 - cooling coil, 15 - fresh air side fan, 16 - exhaust air air conditioning box, 17 - exhaust air side heat recovery coil, 18 - exhaust air side fan, 19 - circulating pump,

[0020] 21 - water collector, 22 - water tank, 23 - atomizer, 24 - liquid level meter, 25 - temperature and humidity sensor, 26 - water supply source, 27 - electromagnetic valve, 28 - pressure booster. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Before describing the specific embodiments of the present application in detail, first introduce the working principle of the existing glycol heat recovery system (as shown in Figure 1

[0023] The glycol heat recovery system mainly includes a fresh air side heat recovery coil 13 arranged in the fresh air air conditioning box 11 and an exhaust air side heat recovery coil 17 arranged in the exhaust air air conditioning box 16. The fresh air side heat recovery coil 13 and the exhaust air side heat recovery coil 17 are connected in series through a circulating pump 19 and a connecting pipe and form a heat exchange loop. A mixed solution of glycol and water is added in the loop as a heat exchange agent. The fresh air air conditioning box 11 is provided with a fresh air filter 12 at the air inlet end for filtering dust and impurities in the fresh air. The fresh air air conditioning box 11 is provided with a fresh air side fan 15 for introducing air into the room. The exhaust air air conditioning box 16 is provided with an exhaust air side fan 18 for introducing air out of the room.

[0024] In summer conditions, the air in the room exchanges heat with the surface of the exhaust air side heat recovery coil 17, thereby reducing the temperature of the glycol solution as the heat exchange medium in the exhaust air side heat recovery coil 17. The circulating pump 19 pressurizes and delivers the heat exchange agent to the fresh air side heat recovery coil 13. At this time, the fresh air exchanges heat with the surface of the fresh air side heat recovery coil 13, thereby reducing the temperature of the fresh air. The temperature of the heat exchange agent in the fresh air side heat recovery coil 13 is increased. The heat exchange agent with increased temperature flows into the exhaust air side heat recovery coil 17 under the action of the circulating pump 19 and exchanges heat with the indoor exhaust air, thereby completing a cold recovery cycle. Figure 1 In the process of circulation of the glycol heat recovery system, a large amount of condensed water is generated when the cooling coil 14 in the fresh air air conditioning box 11 cools and dehumidifies the fresh air. The temperature of the fresh air passing through the fresh air side heat recovery coil 13 also drops sharply to form condensed water. ​

[0025] The utility model, such as Figure 2 and Figure 3 As shown, a mist cooling unit of an ethylene glycol heat recovery system using condensed water includes a water collector 21 and a water tank 22 for collecting condensed water. The water collector 21 is used to collect condensed water from the fresh air side surface cooler 14 of the fresh air air conditioner and the condensed water in the fresh air side heat recovery coil 13 of the ethylene glycol heat recovery system. The water collector 21 transports the collected condensed water to the water tank 22 through a connecting pipe for storage and standby use.

[0026] It also includes an atomizer 23 for spraying water mist onto the exhaust side heat recovery coil 17. The atomizer 23 is transitionally connected to the water tank 22 via a connecting pipe and a supercharger 28. The supercharger 28 transports the condensed water stored in the water tank 22 to the atomizer 23 under pressure, atomizes the water, and sprays the water onto the exhaust side heat recovery coil 17. After the fine water vapor spray is fully mixed with the air, the air temperature at this time has dropped to close to the dew point temperature. After heat exchange on the surface of the exhaust side heat recovery coil 17, the temperature of the ethylene glycol solution in the exhaust side heat recovery coil 17 can be effectively reduced, thereby increasing the heat exchange efficiency of the ethylene glycol heat recovery system.

[0027] Specifically, in this embodiment, the water collector 21 is a tray-shaped water collection container. It is located below the fresh air-side heat recovery coil 13 and the surface cooler 14 to collect condensed water flowing down due to gravity. The tray-shaped water collector 21 is provided with a water outlet, which is connected to the water tank 22 via a connecting pipe.

[0028] Furthermore, the water tank 22 is connected to a water supply source 26 through a connecting pipe. The water supply source 26 can be tap water or purified water. A solenoid valve 27 is provided on the connecting pipe between the water supply source 26 and the water tank 22. The water tank 22 is also provided with a liquid level gauge 24 for monitoring the water level height inside the water tank 22. When the water storage level height inside the water tank 22 is lower than the minimum height monitored by the liquid level gauge 24, the solenoid valve 27 is opened, and water is supplied to the water tank 22 through the water supply source 26 to ensure that there is sufficient water storage in the water tank 22 for atomization cooling.

[0029] Furthermore, it also includes temperature and humidity sensors 25 respectively arranged inside the fresh air air conditioning box 11 and the exhaust air conditioning box 16.

[0030] Of course, if Figure 3 As shown, this embodiment also includes a PLC controller for monitoring and controlling the liquid level meter 24, the temperature and humidity sensor 25, the solenoid valve 27 and the supercharger 28. The electrical connection between the liquid level meter 24, the temperature and humidity sensor 25, the solenoid valve 27 and the supercharger 28 and the PLC is a specific connection method based on existing conventional technology, and the specific connection method will not be elaborated here.

[0031] Working principle:

[0032] 1. The condensed water recovery and utilization is started by detecting the outdoor fresh air temperature and humidity parameters by the temperature and humidity sensor 25 located inside the fresh air air conditioning box 11 and comparing them with the PLC system setting values. When the fresh air temperature and humidity parameters are greater than the PLC setting values, the system is started, that is, the PLC controls the supercharger 28 to start pressurizing, and sprays the condensed water into atomized form to the exhaust side heat recovery coil 17, otherwise it is closed.

[0033] 2. The system automatically monitors the parameters of the liquid level gauge 24 in the water tank 22 and compares them with the PLC system settings. When the water level in the water tank 22 falls below the PLC setting, the PLC issues a command to open the solenoid valve 27, allowing water from the water supply source 26 to enter the water tank 22. The system continues until the level reaches or exceeds the setting of the liquid level gauge 24, at which point the PLC issues a command to close the solenoid valve 27. This configuration has the advantage that if the condensate generated by the fresh air unit is insufficient, water can still be added to the water tank 22 from external sources, ensuring stable operation of the entire system.

[0034] Operation process:

[0035] During summer operation, as outdoor fresh air passes through the fresh air-side heat recovery coil 13 and the surface cooler 14 in the fresh air conditioning unit 11 for heat exchange, the surface temperature of the corresponding coils in these units drops below the dew point of the air on the coils. Water vapor in the air condenses into mist (beads) and eventually drips into the condensate collector 21 below the fresh air-side heat recovery coil 13 and the surface cooler 4. This condensed water is then collected in a water tank 22 via a pipe connection. A supercharger 28 pressurizes the condensed water in the water tank 22 and transports it to the atomizer 23 for spraying. After the fine mist mixes thoroughly with the indoor air, the air temperature has dropped to near the dew point. This mist then passes through the exhaust-side heat recovery coil 17 for heat exchange, effectively lowering the temperature of the ethylene glycol solution in the exhaust-side heat recovery coil 17 and enhancing heat exchange efficiency.

[0036] The fresh air volume and exhaust air volume are both 20000m 3 For example, if the air conditioning system has an outdoor temperature and humidity of 35°C / 60%, the indoor humidity is 24°C / 50%, and the cooling capacity required for the fresh air air conditioning is about 370KW:

[0037] When the conventional ethylene glycol heat recovery efficiency is 60%, only 45KW can be recovered, reducing the energy consumption of the air conditioner by about 12.2%.

[0038] When the condensed water from the air conditioner is sprayed onto the heat recovery coil on the exhaust side, the air with an indoor temperature and humidity of 24°C / 50% is humidified to a near saturated state, and the air temperature and humidity becomes 17.1°C / 100%.

[0039] At this time, the solution outlet temperature of the exhaust air side heat recovery coil 17 corresponding to the glycol heat recovery is reduced from 26.6℃ to 21.3℃, and the cold energy recovered from the exhaust air is increased from 45KW to 73KW, the heat recovery amount is increased by 60%, and the energy consumption of the air conditioner is reduced by about 19.7%.

[0040] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An atomizing cooling unit for an ethylene glycol heat recovery system utilizing condensed water, characterized by: The invention comprises a water collector (21) and a water tank (22) for collecting condensed water, and also comprises an atomizer (23) for spraying water mist onto the heat recovery coil (17) on the exhaust side. The atomizer (23) and the water tank (22) are transitionally connected via a connecting pipe and a booster (28).

2. The atomizing cooling unit of the ethylene glycol heat recovery system using condensed water according to claim 1, characterized in that: The water collector (21) is a tray-shaped water collecting container. A water outlet is provided on the tray-shaped water collector (21), and the water outlet is communicated with the water tank (22) through a connecting pipe.

3. The atomizing cooling unit of the ethylene glycol heat recovery system using condensed water according to claim 1, characterized in that: The water tank (22) is connected to a water supply source (26) via a connecting pipe.

4. The atomizing cooling unit of the ethylene glycol heat recovery system using condensed water according to claim 1, characterized in that: A liquid level meter (24) for monitoring the water level inside the water tank (22) is also provided in the water tank (22).

5. The atomizing cooling unit of the ethylene glycol heat recovery system using condensed water according to claim 4, characterized in that: It also includes a temperature and humidity sensor (25) for monitoring the temperature and humidity inside the fresh air air conditioning box and the exhaust air conditioning box.

6. The atomizing cooling unit of the ethylene glycol heat recovery system using condensed water according to claim 5, characterized in that: The invention also includes a PLC controller for monitoring and controlling the liquid level meter (24), the temperature and humidity sensor (25), the solenoid valve (27) and the supercharger (28), and electrical connections between the liquid level meter (24), the temperature and humidity sensor (25), the solenoid valve (27) and the supercharger (28) and the PLC.

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