All-air air conditioning unit (AHU) with independent temperature and humidity control function

Abstract

The invention relates to an all-air air conditioning unit with independent temperature and humidity control, which comprises a shell, and a control system, a fresh air module, a two-stage dehumidification module, an air return module and an air supply module which are arranged in the shell, the fresh air module is communicated with an air path of the two-stage dehumidification module, the two-stage dehumidification module is communicated with an air path of the air return module, and the air supply module is communicated with the control system. The air return module is communicated with an air path of the air supply module; the unit ensures that the absolute humidity content of fresh air fed into a room is relatively low, so that the indoor air humidity is relatively low, and the problems that the temperature and humidity coupling energy consumption waste is large and the indoor humidity is not ideal in the conventional all-air air conditioning unit are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a full air conditioning unit (AHU) with independent temperature and humidity control. Background Art

[0002] In traditional all-air conditioning units (AHU), outdoor fresh air and indoor return air are mixed and then passed through a low-temperature surface cooler, which reduces the supply air temperature. In this process, the temperature and humidity of the air are simultaneously reduced. In this treatment method, the temperature and humidity are coupled with each other. That is to say, when the room needs dehumidification but not cooling, turning on the air conditioning unit for dehumidification will cause the indoor temperature to be too low, especially in spring, which not only causes energy waste but also makes people feel uncomfortable. Summary of the invention

[0003] The object of the present invention is to provide a full air conditioning unit with independent temperature and humidity control to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a full air conditioning unit with independent temperature and humidity control, comprising a shell and a control system, a fresh air module, a two-stage dehumidification module, a return air module and an air supply module arranged in the shell, the air paths of the fresh air module and the two-stage dehumidification module are connected, the two-stage dehumidification module is connected to the air path of the return air module, and the return air module is connected to the air path of the air supply module; a fresh air inlet, an exhaust outlet, an air supply outlet and a return air inlet are opened on the shell, the fresh air inlet is connected to the fresh air module, the air supply inlet is connected to the air supply module, and the return air inlet is connected to the return air module; the air supply inlet is provided with a first temperature and humidity sensor, the fresh air inlet is provided with a second temperature and humidity sensor, the two-stage dehumidification module is provided with a third temperature and humidity sensor, and the return air inlet is provided with a fourth temperature sensor; the return air module comprises a water-cooled surface cooler, the water-cooled surface cooler is connected to a water path, an electric regulating valve is provided on the water path, and the electric regulating valve is electrically connected to the control system.

[0005] Optionally, the two-stage dehumidification module includes an evaporator and a rotor connected in sequence.

[0006] Optionally, the fresh air module includes a fresh air fan, the fresh air fan is connected to the evaporator through an air path, and the evaporator is connected to the rotor through the air path.

[0007] Optionally, the air supply module includes an air supply fan arranged at the air supply outlet.

[0008] Optionally, a high-efficiency filter is provided between the fresh air inlet and the fresh air blower.

[0009] Optionally, the fresh air inlet, exhaust air outlet, supply air outlet and return air outlet are all arranged on the top plate of the shell.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention processes the latent heat of fresh air by setting up an independent two-stage dehumidification module, and arranges a water-cooled surface cooler mainly for reducing temperature (sensible heat) on the air supply channel after mixing with indoor return air, and a water-circuit electric regulating valve is arranged on the pipeline connecting the surface cooler. In spring and autumn when dehumidification is needed but refrigeration is not needed, the control system will shut off the water circuit of the cooling surface cooler through the electric regulating valve, and the air-conditioning outdoor unit does not need to be turned on. Only the two-stage dehumidification device on the fresh air channel needs to be turned on to ensure that the absolute humidity content of the fresh air delivered to the room is low, thereby ensuring that the indoor air humidity is low, which solves the problem of large energy waste of temperature and humidity coupling of all-air air-conditioning units and unsatisfactory indoor humidity in the past. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0013] Figure 2 It is a schematic diagram of the position of the air outlet of the present invention. DETAILED DESCRIPTION

[0014] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0015] like Figure 1-2 As shown, a full air conditioning unit with independent temperature and humidity control includes a shell 100 and a control system 200, a fresh air module, a two-stage dehumidification module, a return air module and an air supply module arranged in the shell 100, the air paths of the fresh air module and the two-stage dehumidification module are connected, the two-stage dehumidification module is connected to the air path of the return air module, and the return air module is connected to the air path of the air supply module; the shell 100 is provided with a fresh air inlet 300, an exhaust outlet 400, an air supply outlet 500 and a return air inlet 600, the fresh air inlet 300 is connected to the fresh air module, the air supply outlet 400 is connected to the return air module, and the return air inlet 600 is connected to the return air module. 00 is connected with the air supply module, and the return air outlet 600 is connected with the return air module; the air supply outlet 500 is provided with a first temperature and humidity sensor 700, the fresh air outlet 300 is provided with a second temperature and humidity sensor 800, the two-stage dehumidification module is provided with a third temperature and humidity sensor 900, and the return air outlet is provided with a fourth temperature sensor 110; the return air module includes a water-cooled surface cooler 120, the water-cooled surface cooler 120 is connected with a water circuit 130, the water circuit 130 is provided with an electric regulating valve 140, and the electric regulating valve 140 is electrically connected with the control system 200.

[0016] The two-stage dehumidification module includes an evaporator 150 and a rotor 160 connected in sequence. The fresh air module includes a fresh air fan 170, which is connected to the evaporator 150 through an air path, and the evaporator 150 is connected to the rotor 160 through an air path. The air supply module includes an air supply fan 180 arranged at the air supply port 400. A high-efficiency filter is arranged between the fresh air port 300 and the fresh air fan 170. The fresh air port 300, the exhaust port 400, the air supply port 500 and the return air port 600 are all arranged on the top plate of the housing 100.

[0017] It should be noted that in summer mode, when the indoor temperature exceeds the set value, the electric regulating valve 140 on the water circuit 130 of the water-cooled surface cooler 120 is opened, and the refrigeration module is turned on. When the indoor temperature reaches the set value, the electric regulating valve 140 on the water circuit 130 is closed, and the indoor cooling stops. When the fourth temperature sensor 110 of the return air outlet 600 detects that the humidity is higher than the user set value, the two-stage dehumidification module on the fresh air module starts dehumidification, and the control system 200 displays the temperature and humidity before and after the fresh air is processed through the second temperature and humidity sensor 800 and the third temperature and humidity sensor 900. Based on the comparison of the data, it can be known whether the dehumidification module is in normal operation. When the fourth temperature sensor 110 detects that the return air humidity is lower than the user set value, the two-stage dehumidification module stops dehumidification, and the fresh air fan 170 continues to deliver fresh air to the room.

[0018] In summer mode, the two-stage dehumidification module is started, and the dew point temperature of the return air is measured by the fourth temperature sensor 110. The electric regulating valve 140 of the water-cooled surface cooler 120 is adjusted according to the dew point temperature to control the water supply temperature, ensuring that the temperature of the surface of the surface cooler is always higher than the dew point temperature, and no condensation water is generated when processing sensible heat, thereby achieving the effect of dry coil cooling. This design makes the temperature and humidity of the air-conditioning unit completely under independent control without affecting each other. It not only solves the problem of temperature and humidity coupling during cooling of the full air air-conditioning unit in the past, but also prevents excessive dehumidification during cooling in summer, reduces energy waste, and there is no need to start the air-conditioning outdoor unit during dehumidification during the Spring Festival, thus saving energy by more than 30%, and will not cause over-cooling and dehumidification, which will cause discomfort to the human body.

[0019] In winter mode, when the indoor temperature is lower than the set value, the electric regulating valve 140 opens and the unit starts heating. When the indoor temperature reaches the set value, the electric regulating valve 140 closes and the unit stops heating. The humidification device in the device is started according to the absolute humidity content outside obtained by the second temperature and humidity sensor 800. When the absolute humidity content outside is lower than 5g / cubic meter, the humidification module on the air supply module is turned on, and the temperature and humidity value of the indoor supply air is measured by the first temperature and humidity sensor 700. When the fourth temperature sensor 110 measures that the indoor return air humidity reaches the user set value, the humidification device stops working and continues to supply fresh air to the room.

[0020] This invention enables the unit to control the indoor temperature and humidity to an ideal state at the lowest energy consumption all year round, solving the problem of large energy waste of temperature and humidity coupling and unsatisfactory indoor humidity in the past full air conditioning units.

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any indirect modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A full air conditioning unit with independent temperature and humidity control, characterized in that: The invention comprises a housing (100), a control system (200) arranged in the housing (100), a fresh air module, a two-stage dehumidification module, a return air module and an air supply module, wherein the air paths of the fresh air module and the two-stage dehumidification module are connected, the air paths of the two-stage dehumidification module and the return air module are connected, and the air paths of the return air module and the air supply module are connected; The housing (100) is provided with a fresh air inlet (300), an exhaust outlet (400), an air supply outlet (500) and an air return outlet (600); the fresh air inlet (300) is connected to the fresh air module, the air supply outlet (400) is connected to the air supply module, and the return air inlet (600) is connected to the return air module; The air supply port (500) is provided with a first temperature and humidity sensor (700), the fresh air port (300) is provided with a second temperature and humidity sensor (800), the two-stage dehumidification module is provided with a third temperature and humidity sensor (900), and the return air port is provided with a fourth temperature sensor (110); The return air module comprises a water-cooled surface cooler (120), the water-cooled surface cooler (120) is connected to a water circuit (130), an electric regulating valve (140) is provided on the water circuit (130), and the electric regulating valve (140) is electrically connected to a control system (200).

2. A full air conditioning unit with independent temperature and humidity control according to claim 1, characterized in that: The two-stage dehumidification module comprises an evaporator (150) and a rotor (160) which are connected in sequence.

3. The full air conditioning unit with independent temperature and humidity control according to claim 2, characterized in that: The fresh air module comprises a fresh air fan (170), the fresh air fan (170) is connected to the evaporator (150) through an air path, and the evaporator (150) is connected to the rotor (160) through an air path.

4. The full air conditioning unit with independent temperature and humidity control according to claim 3, characterized in that: The air supply module comprises an air supply fan (180) arranged at an air supply port (400).

5. The full air conditioning unit with independent temperature and humidity control according to claim 4, characterized in that: A high-efficiency filter is provided between the fresh air inlet (300) and the fresh air blower (170).

6. The full air conditioning unit with independent temperature and humidity control according to claim 5, characterized in that: The fresh air inlet (300), the exhaust air outlet (400), the air supply outlet (500) and the return air outlet (600) are all arranged on the top plate of the housing (100).

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