CN-116951589-B - Air conditioner external unit, air conditioner unit and air conditioner control method

Abstract

The invention belongs to the technical field of air conditioners, and discloses an air conditioner external unit, an air conditioning unit and an air conditioner control method. The air conditioner external unit comprises an external machine shell, a mounting bracket, a heat exchanger and a fan unit, wherein the external machine shell is provided with an air outlet, the mounting bracket divides the interior of the external machine shell into a first cavity and a second cavity, the heat exchanger is arranged in the second cavity, the fan unit comprises a main fan and at least one auxiliary fan which are both arranged on the mounting bracket, the main fan is arranged in the first cavity between the air outlet and the mounting bracket, the auxiliary fan is arranged in the second cavity between the mounting bracket and the heat exchanger, the main fan and the auxiliary fan independently operate, and the diameter of the auxiliary fan is smaller than that of the main fan. The air conditioner external unit can enable heat exchange of the heat exchanger to be uniform, improve the utilization rate of the heat exchanger, adjust the fan assembly under different operation loads, and improve the operation capacity and the application range of the air conditioner external unit.

Inventors

• ZHOU HANGJUN
• JIANG RUI

Assignees

• 南京天加环境科技有限公司

Dates

Publication Date

20260505

Application Date

20230727

Claims (7)

1. 1. The air conditioner control method is characterized by being used for controlling an air conditioner external unit, and the air conditioner external unit comprises: an outer casing (100), the outer casing (100) being provided with an air outlet (110); A mounting bracket (120), the mounting bracket (120) dividing the interior of the outer housing (100) into a first cavity and a second cavity; -a heat exchanger (300), the heat exchanger (300) being arranged in the second cavity; The fan unit (200) is used for exhausting the gas subjected to heat exchange of the heat exchanger (300) to the air outlet (110), the fan unit (200) comprises a main fan (210) and at least one auxiliary fan (220), wherein the main fan (210) and the auxiliary fan (220) are both installed on the mounting bracket (120), the main fan (210) is arranged in the first cavity between the air outlet (110) and the mounting bracket (120), the auxiliary fan (220) is arranged in the second cavity between the mounting bracket (120) and the heat exchanger (300), the main fan (210) and the auxiliary fan (220) are independently operated, and the diameter of the auxiliary fan (220) is smaller than that of the main fan (210); the air conditioner control method comprises the following steps: Detecting an air inlet side temperature TH1 of the heat exchanger (300), a temperature TH2 of one end of the heat exchanger (300) far away from the main fan (210), a temperature TH4 of one end of the heat exchanger (300) close to the main fan (210), a temperature TH3 at a middle position of the heat exchanger (300) and a coil temperature TH7 of the heat exchanger (300); According to the relation between the difference value of the coil pipe temperature TH7 and the air inlet side temperature TH1 and the preset temperature range, the operation of the fan unit is controlled, and the method comprises the following steps: When the difference between the coil temperature TH7 and the air inlet side temperature TH1 is larger than or equal to the maximum value of a preset temperature range, controlling the main fan (210) and the auxiliary fan (220) to run simultaneously; when the difference between the coil temperature TH7 and the air inlet side temperature TH1 is smaller than the minimum value of a preset temperature range, the main fan (210) is turned off, and only the auxiliary fan (220) is turned on; When the difference between the coil temperature TH7 and the air inlet side temperature TH1 is in a preset temperature range, the maximum rotating speed of the main fan (210) is reduced, and the maximum rotating speed of the auxiliary fan (220) is increased until the values of TH4-TH3 and TH3-TH2 are not larger than a preset threshold value.
2. 2. The air conditioner control method according to claim 1, wherein the diameter of the auxiliary fan (220) is 0.618 times the diameter of the main fan (210).
3. 3. The air conditioner control method according to claim 1, wherein the air outlet (110) is provided at the top of the outer casing (100), 1 auxiliary fan (220) is provided, and the main fan (210) and the auxiliary fan (220) are coaxially arranged up and down.
4. 4. An air conditioner control method according to claim 3, wherein the auxiliary fan (220) includes an auxiliary rotating shaft (221) connected to the mounting bracket (120), the auxiliary rotating shaft (221) being provided in a predetermined length in a vertical direction.
5. 5. The air conditioner control method according to claim 4, wherein the preset length is 0.5 times the height of the heat exchanger (300) in the vertical direction.
6. 6. An air conditioner control method according to claim 3, wherein the heat exchanger (300) includes at least two heat exchange plates (310), the at least two heat exchange plates (310) being enclosed in the second chamber.
7. 7. The air conditioner control method according to claim 6, wherein the heat exchange plates (310) are disposed to extend in a vertical direction or disposed at a predetermined angle to the vertical direction.

Description

Air conditioner external unit, air conditioner unit and air conditioner control method Technical Field The invention relates to the technical field of air conditioners, in particular to an air conditioner external unit, an air conditioning unit and an air conditioner control method. Background The air-cooled cold and hot air conditioning unit or the air-cooled cold and hot water air conditioning unit is a multi-split air conditioning unit or a module machine, the outer machine of the air conditioning unit is a V-shaped or straight heat exchanger, a fan is arranged at the top of the heat exchanger, and negative pressure is formed on the surface of the heat exchanger by the fan, so that air flows through the fan and the heat exchanger. However, in the prior art, the fan arranged at the top of the heat exchanger inevitably has the following problems that firstly, the surface pressure difference at the upper part of the heat exchanger close to the fan is large, the wind speed is large, and the surface pressure difference at the lower part of the heat exchanger far away from the fan is small, the wind speed is relatively small, so that the heat exchange of the heat exchanger is uneven, the utilization rate is low, and secondly, when the external machine runs under a small load, the fan blade size of the fan cannot be changed in the prior art, and the motor for driving the fan to rotate has the minimum rotating speed under the influence of the moment of the motor, so that the air flow brought by the fan has a fixed minimum value, and the minimum value can cause the problems of freezing, the over-low air outlet temperature and the like of the indoor heat exchanger when the external machine runs under a low load, so that the use experience of users is reduced. Therefore, there is a need to provide an air conditioner outdoor unit, so as to solve the above technical problems in the prior art Disclosure of Invention The invention aims to provide an air conditioner outdoor unit which can enable heat exchange of a heat exchanger to be uniform, improve the utilization rate of the heat exchanger, adjust fan assemblies under different running loads and improve the running capacity and the use range of the air conditioner outdoor unit. To achieve the purpose, the invention adopts the following technical scheme: The air conditioner external unit comprises an external machine shell, a mounting bracket, a heat exchanger and a fan unit, wherein the external machine shell is provided with an air outlet, the mounting bracket divides the interior of the external machine shell into a first cavity and a second cavity, the heat exchanger is arranged in the second cavity, the fan unit is used for discharging air subjected to heat exchange of the heat exchanger to the air outlet, the fan unit comprises a main fan and at least one auxiliary fan, the main fan is arranged in the first cavity between the air outlet and the mounting bracket, the auxiliary fan is arranged in the second cavity between the mounting bracket and the heat exchanger, the main fan and the auxiliary fan are independently operated, and the diameter of the auxiliary fan is smaller than that of the main fan. Optionally, the diameter of the auxiliary fan is 0.618 times the diameter of the main fan. Optionally, the air outlet is disposed at the top of the outer casing, 1 auxiliary fan is disposed, and the main fan and the auxiliary fan are coaxially disposed up and down. Optionally, the auxiliary fan includes an auxiliary rotating shaft connected to the mounting bracket, and the auxiliary rotating shaft is set in a preset length along a vertical direction. Optionally, the preset length is 0.5 times the height of the heat exchanger in the vertical direction. Optionally, the heat exchanger includes at least two heat exchange plates, and the at least two heat exchange plates are enclosed in the second cavity. Optionally, the heat exchange plate extends in a vertical direction or is disposed at a preset angle with respect to the vertical direction. Another object of the present invention is to provide an air conditioning unit, which includes an indoor unit and the air conditioning outdoor unit according to any of the above schemes, wherein a refrigerant circuit is disposed between the indoor unit and the air conditioning outdoor unit in a communicating manner. It is still another object of the present invention to provide an air conditioner control method for controlling an air conditioner outdoor unit according to any one of the above aspects, comprising the steps of: detecting the temperature TH1 of the air inlet side of the heat exchanger, the temperature TH2 of one end of the heat exchanger far away from the main fan, the temperature TH4 of one end of the heat exchanger close to the main fan, the temperature TH3 of the middle position of the heat exchanger and the coil temperature TH7 of the heat exchanger; And controlling the operation of the fan unit according to the r