Fresh air handling unit with direct expansion type evaporator

Abstract

The utility model discloses a fresh air handling unit with a direct expansion type evaporator, which relates to the technical field of fresh air handling units and comprises a mounting mechanism, a temperature control mechanism capable of adjusting the temperature of fresh air is arranged at the bottom of an inner cavity of the mounting mechanism, a humidifying mechanism capable of adjusting the humidity of the fresh air is arranged on one side of the inner cavity of the mounting mechanism, and the humidifying mechanism is connected with the direct expansion type evaporator. The temperature control mechanism comprises a direct expansion type evaporator capable of exchanging heat with fresh air, and the humidifying mechanism comprises a heater capable of heating and evaporating water. Through the arrangement of the temperature control mechanism and the heat exchange mode that the direct expansion type evaporator makes direct contact with the fresh air, the temperature of the fresh air is adjusted, the temperature of the fresh air can be adjusted to the proper temperature, purified water needed for humidification can be heated through the arrangement of the heating assembly in the humidification mechanism, and the humidification efficiency is improved. While the steam is generated to humidify the fresh air, water freezing caused by too low temperature of the fresh air in winter is avoided, and the fresh air humidifier is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air units, and particularly relates to a fresh air unit with a direct expansion evaporator. Background Art

[0002] A fresh air unit is a device that can provide fresh air for an indoor space and process and condition the air. Fresh air units are widely used in residential buildings, commercial buildings, office buildings, hospitals, schools, etc., which helps to improve the quality of people's living and working environments and ensure health and comfort.

[0003] For example, Chinese Patent Publication No. CN220083241 U discloses a fresh air unit, which includes a floor-mounted mounting frame and a ventilation fan mounted on the floor-mounted mounting frame; the floor-mounted mounting frame has a mounting frame for fitting against a window frame, the mounting frame forms a fresh air inlet, and the air inlet of the ventilation fan faces the fresh air inlet. The installation of the fresh air unit in the present utility model is relatively simple.

[0004] Although the above example can improve the installation convenience through the setting of the mounting frame, when the fresh air is input into the room, since the above fresh air mechanism does not have the function of temperature adjustment, when the fresh air is input into the room, it will change the temperature of the indoor air, which is likely to cause the indoor temperature to be too high or too low in summer or winter, resulting in certain inconvenience in use. And in winter, since the humidifying mechanism does not have a heating function, it is easy for the pure water required for humidification to freeze and thus lose the humidifying effect, resulting in certain inconvenience in use. Summary of the Utility Model

[0005] The utility model provides a fresh air unit with a direct expansion evaporator to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A fresh air unit with a direct expansion evaporator includes an installation mechanism. At the bottom of the inner cavity of the installation mechanism, there is a temperature control mechanism that can adjust the temperature of the fresh air. On one side of the inner cavity of the installation mechanism, there is a humidifying mechanism that can adjust the humidity of the fresh air. The humidifying mechanism, the temperature control mechanism includes a direct expansion evaporator that can perform heat exchange with the fresh air, and the humidifying mechanism includes a heater that can heat and evaporate water.

[0008] A further improvement of the technical solution of the utility model lies in that: the installation mechanism includes an installation box with a maintenance door at the top. An installation cavity is arranged inside the installation box. A ventilation cavity is arranged inside the installation box and on one side of the installation cavity. A control module is fixedly connected to the surface of the installation box. A control panel is arranged on one side of the surface of the installation box. A heat dissipation fan is fixedly connected to the inner wall of the installation cavity.

[0009] A further improvement of the technical solution of the present utility model lies in that: on one side of the inner cavity of the ventilation chamber, an air inlet pipe is fixedly connected, a blower is arranged inside the air inlet pipe, on the other side of the inner cavity of the ventilation chamber, an air outlet pipe with a temperature and humidity sensor arranged on its inner wall is provided, a filter plate is inserted at one end of the inner wall of the ventilation chamber close to the air inlet pipe, a collection tank capable of collecting condensed water is arranged at the bottom of the inner cavity of the ventilation chamber, a drain pipe is arranged on one side of the inner cavity of the collection tank, and the control module is in signal connection with the temperature and humidity sensor arranged inside the air outlet pipe.

[0010] A further improvement of the technical solution of the present utility model lies in that: the temperature control mechanism further includes a throttle, the outlet of the throttle is connected to the inlet of the direct expansion evaporator through a pipeline, and the inlet of the throttle is connected to a condenser through a pipeline.

[0011] A further improvement of the technical solution of the present utility model lies in that: the inlet of the condenser is connected to a compressor through a pipeline, the inlet of the compressor is connected to the outlet of the direct expansion evaporator through a pipeline, and the direct expansion evaporator is arranged inside the ventilation chamber.

[0012] A further improvement of the technical solution of the present utility model lies in that: the humidification mechanism includes a plug-in member, the surface of the plug-in member is inserted at one end of the inner wall of the ventilation chamber close to the air outlet pipe, a storage bin storing pure water is fixedly connected to the bottom of the inner cavity of the plug-in member, the inner wall of the storage bin is fixedly connected to the surface of a heater, the top of the storage bin is fixedly connected to a steam pipe communicating with the inner cavity of the storage bin, and steam holes are formed on the surface of the steam pipe.

[0013] A further improvement of the technical solution of the present utility model lies in that: a liquid level sensor is fixedly connected to the top of the inner cavity of the storage bin, and the liquid level sensor is in signal connection with the control module.

[0014] A further improvement of the technical solution of the present utility model lies in that: a water inlet pipe is arranged on the inner wall of the storage bin, one end of the water inlet pipe is fixedly connected to a solenoid valve, a water delivery pipe of an external water pump is arranged at the inlet and outlet ends of the solenoid valve, and the solenoid valve is in signal connection with the control module.

[0015] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0016] The utility model provides a fresh air unit with a direct expansion evaporator. Through the setting of a temperature control mechanism, by using the heat exchange method of direct contact between the direct expansion evaporator and the fresh air, the temperature of the fresh air is adjusted so that the temperature of the fresh air can be adjusted to an appropriate temperature. And the setting of the heating component in the humidifying mechanism can heat the pure water required for humidification, generate steam to humidify the fresh air, and avoid the water from freezing due to too low temperature of the fresh air in winter, making it more convenient to use. Description of the Drawings

[0017] Figure 1 is the front view structural schematic diagram of the utility model;

[0018] Figure 2 is the side view structural schematic diagram of the utility model;

[0019] Figure 3 is the internal view structural schematic diagram of the utility model;

[0020] Figure 4 is the sectional view structural schematic diagram of the utility model;

[0021] Figure 5 is the exploded view structural schematic diagram of the humidifying mechanism of the utility model.

[0022] In the figure: 1. Installation mechanism; 11. Installation box; 12. Installation cavity; 13. Ventilation cavity; 14. Air inlet pipe; 15. Blower; 16. Air outlet pipe; 17. Filter plate; 18. Collection tank; 19. Drain pipe; 2. Temperature control mechanism; 21. Throttle; 22. Condenser; 23. Compressor; 24. Direct expansion evaporator; 25. Control panel; 26. Control module; 27. Cooling fan; 3. Humidifying mechanism; 31. Connector; 32. Storage bin; 33. Heater; 34. Steam pipe; 35. Liquid level sensor; 36. Water inlet pipe; 37. Solenoid valve; 38. Water delivery pipe. Detailed Description of the Preferred Embodiment

[0023] The following further describes the present utility model in detail with reference to the embodiments:

[0024] Embodiment 1

[0025] As Figures 1-5As shown in the figure, the utility model provides a fresh air unit with a direct expansion evaporator, which includes an installation mechanism 1. At the bottom of the inner cavity of the installation mechanism 1, there is a temperature control mechanism 2 that can adjust the temperature of the fresh air. On one side of the inner cavity of the installation mechanism 1, there is a humidification mechanism 3 that can adjust the humidity of the fresh air. The humidification mechanism 3 and the temperature control mechanism 2 include a direct expansion evaporator 24 that can exchange heat with the fresh air. The humidification mechanism 3 includes a heater 33 that can heat and evaporate water. The installation mechanism 1 includes an installation box 11 with a maintenance door at the top. Inside the installation box 11, there is an installation cavity 12. On one side of the installation cavity 12 inside the installation box 11, there is a ventilation cavity 13. On the surface of the installation box 11, there is a fixed control module 26. On one side of the surface of the installation box 11, there is a control panel 25. The inner wall of the installation cavity 12 is fixedly connected with a heat dissipation fan 27. On one side of the inner cavity of the ventilation cavity 13, there is an air inlet pipe 14 fixedly connected. Inside the air inlet pipe 14, there is a blower 15. On the other side of the inner cavity of the ventilation cavity 13, there is an air outlet pipe 16 with a temperature and humidity sensor arranged on its inner wall. One end of the inner wall of the ventilation cavity 13 close to the air inlet pipe 14 is inserted with a filter plate 17. At the bottom of the inner cavity of the ventilation cavity 13, there is a collection tank 18 that can collect condensate water. On one side of the inner cavity of the collection tank 18, there is a drain pipe 19. The control module 26 is in signal connection with the temperature and humidity sensor arranged inside the air outlet pipe 16.

[0026] In this embodiment, the outside fresh air is input into the ventilation cavity 13 along the air inlet pipe 14 by the blower 15. Under the action of the filter plate 17, the dust in the air can be removed. Subsequently, under the action of the direct expansion evaporator 24, the liquid refrigerant evaporates into a gas in the direct expansion evaporator 24 and exchanges heat with the fresh air in the ventilation cavity 13, so as to achieve the effect of adjusting the temperature of the fresh air.

[0027] Embodiment 2

[0028] As Figures 1-5 shown, on the basis of Embodiment 1, the utility model provides a technical solution: Preferably, the temperature control mechanism 2 further includes a throttle valve 21. The outlet of the throttle valve 21 is connected to the inlet of the direct expansion evaporator 24 through a pipeline. The inlet of the throttle valve 21 is connected to a condenser 22 through a pipeline. The inlet of the condenser 22 is connected to a compressor 23 through a pipeline. The inlet of the compressor 23 is connected to the outlet of the direct expansion evaporator 24 through a pipeline. The direct expansion evaporator 24 is arranged inside the ventilation cavity 13.

[0029] In this embodiment, the gaseous refrigerant enters the compressor 23 from the outlet of the direct expansion evaporator 24 and is compressed into a high-temperature compressed gas. Subsequently, it enters the condenser 22 and condenses into a liquid again. Then, under the action of the throttle valve 21, the pressure and temperature of the refrigerant are reduced, and it enters the direct expansion evaporator 24 again for cyclic heat exchange, making it more convenient to use. At the same time, the setting of the heat dissipation fan 27 can dissipate heat from the condenser 22.

[0030] Example 3

[0031] As Figures 1-5 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: Preferably, the humidifying mechanism 3 includes a plug-in member 31, the surface of the plug-in member 31 is plugged into one end of the inner wall of the ventilation cavity 13 close to the air outlet pipe 16, the bottom of the inner cavity of the plug-in member 31 is fixedly connected with a storage bin 32 storing pure water, the inner wall of the storage bin 32 is fixedly connected with the surface of a heater 33, the top of the storage bin 32 is fixedly connected with a steam pipe 34 communicating with the inner cavity of the storage bin 32, steam holes are formed in the surface of the steam pipe 34, the top of the inner cavity of the storage bin 32 is fixedly connected with a liquid level sensor 35, the liquid level sensor 35 is in signal connection with the control module 26, a water inlet pipe 36 is arranged on the inner wall of the storage bin 32, one end of the water inlet pipe 36 is fixedly connected with a solenoid valve 37, a water delivery pipe 38 of an external water pump is arranged at the inlet and outlet ends of the solenoid valve 37, and the solenoid valve 37 is in signal connection with the control module 26.

[0032] In this embodiment, under the action of the heater 33, the pure water in the storage bin 32 is heated, the evaporation of the pure water is accelerated, the steam enters the fresh air along the steam pipe 34 to humidify the fresh air, and the temperature and humidity of the fresh air can be detected by the temperature and humidity sensor in the air outlet pipe 16, so that it is more convenient to adjust the output power of the heater 33 and the temperature control mechanism 2, and further adjust the temperature and humidity of the fresh air. At the same time, during the humidifying process, the liquid level sensor 35 can detect the remaining amount of pure water in the storage bin 32. When the remaining amount is small, the control module 26 opens the solenoid valve 37, so that the pure water enters the water inlet pipe 36 from the water delivery pipe 38 to add water to the storage bin 32, avoiding the dryness of the pure water in the storage bin 32 and making it more convenient to use.

[0033] Next, the working principle of the fresh air unit with a direct expansion evaporator will be specifically described.

[0034] As Figures 1-5As shown in the figure, during use, fresh outdoor air is input into the ventilation chamber 13 along the air inlet pipe 14 by the blower 15. Under the action of the filter plate 17, dust in the air can be removed. Subsequently, under the action of the direct expansion evaporator 24, the liquid refrigerant evaporates into a gas in the direct expansion evaporator 24, exchanges heat with the fresh air in the ventilation chamber 13, so as to achieve the effect of adjusting the temperature of the fresh air. The gaseous refrigerant enters the compressor 23 from the outlet of the direct expansion evaporator 24, is compressed into a high-temperature compressed gas, and then enters the condenser 22, where it re-condenses into a liquid state. Subsequently, under the action of the throttle 21, the pressure and temperature of the refrigerant are reduced, and it enters the direct expansion evaporator 24 again for cyclic heat exchange, making it more convenient to use. At the same time, the setting of the heat dissipation fan 27 can dissipate heat from the condenser 22. Subsequently, under the action of the heater 33, the purified water in the storage bin 32 is heated to accelerate the evaporation of the purified water, so that the steam enters the fresh air along the steam pipe 34 to humidify the fresh air. And the temperature and humidity of the fresh air can be detected by the temperature and humidity sensor in the air outlet pipe 16, making it more convenient to adjust the output power of the heater 33 and the temperature control mechanism 2, thereby adjusting the temperature and humidity of the fresh air. At the same time, during the humidification process, the remaining amount of purified water in the storage bin 32 can be detected by the liquid level sensor 35. When the remaining amount is less, the control module 26 opens the solenoid valve 37, so that the purified water enters the water inlet pipe 36 from the water delivery pipe 38 to add water to the storage bin 32, avoiding the drying up of the purified water in the storage bin 32 and making it more convenient to use.

[0035] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A fresh air unit with a direct expansion evaporator, comprising a mounting mechanism (1), characterized in that: A temperature control mechanism (2) capable of adjusting the temperature of fresh air is disposed at the bottom of the inner cavity of the installation mechanism (1), and a humidification mechanism (3) capable of adjusting the humidity of fresh air is disposed on one side of the inner cavity of the installation mechanism (1). The humidification mechanism (3) and the temperature control mechanism (2) include a direct expansion evaporator (24) capable of exchanging heat with the fresh air, and the humidification mechanism (3) includes a heater (33) capable of heating and evaporating water.

2. A fresh air unit with a direct expansion evaporator according to claim 1, characterized in that: The installation mechanism (1) comprises an installation box (11) with an inspection door on the top, an installation cavity (12) is arranged inside the installation box (11), a ventilation cavity (13) is arranged inside the installation box (11) and on one side of the installation cavity (12), a control module (26) is fixedly connected to the surface of the installation box (11), a control panel (25) is arranged on one side of the surface of the installation box (11), and a heat dissipation fan (27) is fixedly connected to the inner wall of the installation cavity (12).

3. A fresh air unit with a direct expansion evaporator according to claim 2, characterized in that: An air inlet pipe (14) is fixedly connected to one side of the inner cavity of the ventilation chamber (13), a blower (15) is arranged inside the air inlet pipe (14), an air outlet pipe (16) with a temperature and humidity sensor arranged on the inner wall is arranged on the other side of the inner cavity of the ventilation chamber (13), a filter plate (17) is inserted into one end of the inner wall of the ventilation chamber (13) close to the air inlet pipe (14), a collection trough (18) for collecting condensed water is arranged at the bottom of the inner cavity of the ventilation chamber (13), a drain pipe (19) is arranged on one side of the inner cavity of the collection trough (18), and the control module (26) is connected to the temperature and humidity sensor signal arranged inside the air outlet pipe (16).

4. A fresh air unit with a direct expansion evaporator according to claim 1, characterized in that: The temperature control mechanism (2) further comprises a throttle (21), the outlet of the throttle (21) being connected to the inlet of the direct expansion evaporator (24) via a pipeline, and the inlet of the throttle (21) being connected to the condenser (22) via a pipeline.

5. A fresh air unit with a direct expansion evaporator according to claim 4, characterized in that: The inlet of the condenser (22) is connected to a compressor (23) via a pipeline, and the inlet of the compressor (23) is connected to the outlet of a direct expansion evaporator (24) via a pipeline. The direct expansion evaporator (24) is arranged inside the ventilation chamber (13).

6. A fresh air unit with a direct expansion evaporator according to claim 1, characterized in that: The humidifying mechanism (3) comprises a plug-in connector (31), the surface of which is plugged into an end of the inner wall of the ventilation cavity (13) close to the air outlet pipe (16), the bottom of the inner cavity of the plug-in connector (31) is fixedly connected to a storage bin (32) storing pure water, the inner wall of the storage bin (32) is fixedly connected to the surface of the heater (33), the top of the storage bin (32) is fixedly connected to a steam pipe (34) communicating with the inner cavity of the storage bin (32), and a steam hole is provided on the surface of the steam pipe (34).

7. A fresh air unit with a direct expansion evaporator according to claim 6, characterized in that: A liquid level sensor (35) is fixedly connected to the top of the inner cavity of the storage bin (32), and the liquid level sensor (35) is signal-connected to the control module (26).

8. A fresh air unit with a direct expansion evaporator according to claim 7, characterized in that: The inner wall of the storage bin (32) is provided with a water inlet pipe (36), one end of the water inlet pipe (36) is fixedly connected to a solenoid valve (37), the inlet and outlet ends of the solenoid valve (37) are provided with a water delivery pipe (38) of an external water pump, and the solenoid valve (37) is connected to the control module (26) by signal.

Images