Air duct structure of air conditioner and air outlet control method thereof

Abstract

The application discloses an air duct structure of an air conditioner and an air outlet control method thereof. The air duct structure comprises a split indoor unit and an outdoor unit, the indoor unit and the outdoor unit are connected with each other through an air pipe and a liquid pipe, the indoor unit comprises indoor air fans which are arranged below a side of a device to be cooled respectively, a refrigeration circuit, a return air / new air outlet, a temperature sensor and an electric control box. The refrigeration circuit comprises a gas circuit connected with the air pipe and a liquid circuit connected with the liquid pipe, and the refrigeration circuit cools the indoor air fans through an evaporator. The return air / new air outlet switches the return air outlet or the new air outlet according to the air outlet temperature of the indoor air fan. The temperature sensor detects the air outlet temperature and the ambient temperature at the air outlet of each indoor air fan respectively. The electric control box controls the switching of the return air outlet and the new air outlet according to the detected air outlet temperature and ambient temperature, and adjusts the frequency of the air conditioner. The air outlet is arranged at the side and the bottom of different charging devices, the air outlet is accurately sent to the corresponding device, the air supply is more reasonable and uniform, and the temperature regulation efficiency of the air conditioner is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning air outlet, and more particularly to an air conditioning duct structure and its air outlet control method. Background Technology

[0002] Currently, the penetration rate of new energy vehicles is increasing, and the trend of vehicle electrification is significant. However, the problem of "charging difficulties" that plagues new energy vehicles has not been well resolved. Among them, the insufficient proportion of fast charging infrastructure is one of the main reasons for the charging difficulties of new energy vehicles. Therefore, urban fast charging infrastructure has become an important part of new infrastructure construction.

[0003] Currently, integrated charging stations have built-in air conditioning to cool the charging piles during hot weather and prevent overheating malfunctions. Most integrated charging stations on the market control the internal temperature based on the return air temperature; and most use direct grille airflow without ductwork, resulting in uneven air distribution.

[0004] For example, a "wind-solar-energy storage integrated charging and swapping station for new energy vehicles" disclosed in Chinese patent literature, publication number CN216929658U, includes a charging station and a swapping station. The swapping station is located to one side of the charging station. A photovoltaic power generation system is installed at the top of the charging station, and a micro-wind power generation system is installed at the top of the swapping station. An energy conversion system is installed inside the swapping station, and an energy storage system is installed at the bottom of the energy conversion system. The photovoltaic power generation system and the micro-wind power generation system are electrically connected to the energy conversion system. An air conditioning system is installed at the top of the swapping station, and a heating system is installed on one side of the swapping station. This solution uses direct airflow for temperature control, resulting in uneven airflow and an inability to accurately cool the charging equipment. Summary of the Invention

[0005] This invention primarily addresses the problem that existing air conditioners use direct airflow for temperature control, resulting in uneven airflow and an inability to precisely cool charging devices. It provides an air duct structure and its airflow control method, which precisely delivers air to the corresponding devices through duct positioning design, resulting in more rational and uniform airflow and improved temperature regulation efficiency.

[0006] The above-mentioned technical problems of the present invention are mainly solved by the following technical solutions:

[0007] An air conditioning duct structure includes a split-type indoor unit and an outdoor unit, which are interconnected by gas pipes and liquid pipes. The indoor unit includes:

[0008] Indoor fans are installed below one side of the equipment to be cooled;

[0009] The refrigeration circuit, consisting of a gas circuit connected to the gas pipe and a liquid circuit connected to the liquid pipe, cools the air supplied by the indoor fan through an evaporator; the return air / fresh air inlet switches between the return air inlet and the fresh air inlet based on the air temperature supplied by the indoor fan.

[0010] Temperature sensors are used to detect the outlet air temperature and ambient temperature at each indoor fan outlet.

[0011] The electrical control box controls the switching between the return air vent and the fresh air vent based on the detected outlet air temperature and ambient temperature, combined with the charging status of the charging station, and adjusts the air conditioning frequency.

[0012] Air outlets are set at the bottom of the side for different charging devices. The cold air blown out of the outlets sinks due to its higher density, further cooling the charging devices. The air is precisely delivered to the corresponding devices, making the air distribution more reasonable and even, and improving the temperature regulation efficiency of the air conditioner.

[0013] Preferably, the gas circuit is connected to the outdoor unit via a gas pipe, which passes through a compressor and a gas-liquid separator before connecting to the evaporator. The liquid circuit is connected to the outdoor unit via a liquid pipe, which passes through a liquid receiver, a dryer filter, and an expansion valve before connecting to the evaporator. This indirect cooling via the evaporator prevents moisture from entering the charging equipment and causing a short circuit.

[0014] Preferably, the electrical control box is located at the return air / fresh air inlet. By utilizing the temperature difference between the return air and the electrical control box, and using waste heat to cool the electrical control box, waste heat is fully utilized, overcoming the inherent biases of the prior art.

[0015] Preferably, a water seal layer is installed along the edge of the indoor fan outlet. The water seal layer isolates the interior of the indoor unit from the space of the charging equipment, reducing the space that needs to be cooled; at the same time, the water seal layer further ensures the temperature of the air outlet.

[0016] Preferably, the bottom of the water seal layer is connected to the liquid pipe, and a single-permeation membrane is provided at the connection between the bottom of the water seal layer and the liquid pipe, extending from the inside out. The temperature of the water seal layer is close to the ambient temperature, and the temperature of the liquid in the liquid pipe is close to the temperature inside the indoor unit. When the ambient temperature is higher than the outlet temperature, the density of the water seal layer is less than the density of the liquid pipe, and the liquid can seep out from the single-permeation membrane; otherwise, the liquids on both sides do not interact.

[0017] Preferably, an air particle probe is installed at the fresh air inlet. When the concentration of air particles detected by the air particle probe is greater than a set concentration threshold, the fresh air inlet is normally closed.

[0018] An air outlet control method for an air conditioner includes the following steps:

[0019] S1: Obtain the outlet air temperature and ambient temperature of each indoor fan at the set sampling frequency;

[0020] S2: Control the switching between the return air vent and the fresh air vent based on the comparison between the detected outlet air temperature and the ambient temperature;

[0021] S3: Control the air conditioning frequency based on the detected temperature and the charging status of the charging pile.

[0022] Based on the charging pile's operating status and the ambient temperature, the air conditioning power is adjusted to allow the unit to operate in the optimal and most energy-efficient state, thereby reducing the unit's power consumption.

[0023] Preferably, when the outlet air temperature of all indoor fans exceeds the ambient temperature, switch to the fresh air inlet and close the return air inlet;

[0024] When the outlet air temperature of the indoor unit is lower than the ambient temperature, close the fresh air inlet and switch to the return air inlet.

[0025] Ideally, the air conditioning frequency should be 0 when the fresh air vent is open.

[0026] When the return air vent is open, the air conditioning frequency is controlled based on the collected temperature data and the charging pile status.

[0027] Determine if the charging station is currently charging; if so, proceed to adjust the air conditioning frequency during charging hours; otherwise, proceed to adjust the air conditioning frequency during off-peak hours.

[0028] The frequency adjustment process for the rechargeable air conditioner is as follows:

[0029]

[0030]

[0031] The process of adjusting the air conditioner frequency during off-peak hours is as follows:

[0032]

[0033] in, Air conditioning frequency during charging;

[0034] The frequency of air conditioning during off-peak hours;

[0035] The real-time temperature inside the charging station is collected;

[0036] The preset temperature; The set rated temperature difference;

[0037] This refers to the maximum air conditioner frequency during charging.

[0038] The optimal air conditioning frequency during charging;

[0039] N is the frequency adjustment level;

[0040] [·] indicates rounding.

[0041] Preferably, the set sampling frequency includes the temperature sampling frequency during charging and the temperature sampling frequency during idle time; the set temperature sampling frequency is adjusted according to the air conditioning frequency;

[0042] The process of adjusting the temperature sampling frequency during charging is as follows:

[0043]

[0044] in, The temperature sampling frequency during charging;

[0045] The set temperature sampling frequency value during charging;

[0046] This represents the average historical air conditioning frequency.

[0047] The process for adjusting the idle temperature sampling frequency is as follows:

[0048]

[0049] in, The temperature sampling frequency during idle periods;

[0050] This is the set idle temperature sampling frequency value.

[0051] The air conditioning frequency is related to the temperature sampling frequency. Adjusting the temperature sampling frequency according to the air conditioning frequency will make the two compatible. This will not only avoid collecting too much useless data and wasting energy, but also ensure that all useful data is collected and avoid data omission.

[0052] The beneficial effects of this invention are:

[0053] 1. Air outlets are set at the bottom of the side for different charging devices. The cold air blown out of the air outlets sinks due to the high density of cold air, which cools the charging devices again. The air is precisely delivered to the corresponding devices, making the air distribution more reasonable and even and improving the temperature regulation efficiency of the air conditioner.

[0054] 2. The water seal layer isolates the interior of the indoor unit from the space of the charging equipment, reducing the space that needs to be cooled; at the same time, the water seal layer further ensures the temperature of the air outlet.

[0055] 3. The air conditioning frequency is related to the temperature sampling frequency. Adjusting the temperature sampling frequency according to the air conditioning frequency will make the two compatible. This will not only avoid collecting too much useless data and wasting energy, but also ensure that all useful data is collected and avoid data omission. Attached Figure Description

[0056] Figure 1 is a schematic diagram of the structure of the air conditioner of the present invention.

[0057] Figure 2 is a schematic diagram of the structure of the indoor unit of the present invention.

[0058] Figure 3 is a flowchart of the air outlet control method of the present invention.

[0059] In the diagram: 1. Indoor fan, 2. Gas pipe, 3. Liquid pipe, 4. Compressor, 5. Gas-liquid separator, 6. Liquid receiver, 7. Dryer filter, 8. Expansion valve, 9. Evaporator, 10. Electrical control box, 11. Outdoor fan, 12. Condenser. Detailed Implementation

[0060] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0061] Example 1:

[0062] The air duct structure of an air conditioner according to this embodiment is shown in Figure 1. The air conditioner includes an indoor unit and an outdoor unit.

[0063] The outdoor unit includes an outdoor fan 11 and a condenser 12. Between two adjacent condensers 12, one is connected to a gas pipe 2, and the other to a liquid pipe 3. The indoor unit is connected to the outdoor unit via the gas pipe 2 and the liquid pipe 3.

[0064] As shown in Figures 1 and 2, the indoor unit includes an indoor fan 1, a refrigeration circuit, and an electrical control box 10.

[0065] The refrigeration circuit includes a gas circuit and a liquid circuit. The input end of the gas circuit is connected to the gas pipe 2, which is connected to the outdoor unit, and the input end of the liquid circuit is connected to the liquid pipe 3, which is also connected to the outdoor unit. The gas circuit and the liquid circuit are connected to the evaporator 9 to provide cooling for the air outlet of the indoor fan 1.

[0066] The gas circuit passes through the gas pipe 2 connected to the outdoor unit, then through the compressor 4 and the gas-liquid separator 5, and finally connects to the evaporator 9.

[0067] The liquid circuit is connected to the evaporator 9 via the liquid pipe 3 connected to the outdoor unit, through the liquid receiver 6, the dryer filter 7, and the expansion valve 8.

[0068] The cooling surface of the evaporator 9 is inclined and positioned below the indoor fan 1, so that cooling is achieved indirectly through the evaporator 9, thus preventing water vapor from entering the charging equipment and causing a short circuit.

[0069] Indoor fans 1 are installed below each of the devices to be cooled. Air outlets are set at the bottom next to each different charging device. The cold air blown out of the air outlets sinks due to its higher density, further cooling the charging devices. The air is precisely delivered to the corresponding devices, resulting in more reasonable and even air distribution and improved temperature regulation efficiency of the air conditioner.

[0070] Temperature sensors detect the outlet air temperature and ambient temperature at each indoor fan outlet; the indoor unit is equipped with a return air / fresh air inlet, which switches to the return air inlet or the fresh air inlet according to the outlet air temperature of the indoor fan.

[0071] The electrical control box 10 is located at the return air / fresh air inlet. Based on the detected outlet air temperature and ambient temperature, combined with the charging status of the charging station, it controls the switching between the return air inlet and the fresh air inlet, adjusting the air conditioning frequency. Utilizing the temperature difference between the return air and the electrical control box 10, waste heat is used to cool the electrical control box 10, making full use of waste heat and overcoming the inherent biases of existing technologies.

[0072] An air particle detector is installed at the fresh air inlet. When the concentration of air particles detected by the detector exceeds a set concentration threshold, the fresh air inlet will remain closed. When a high concentration of air particles is detected, it is determined that the external air environment is poor, and the fresh air system will not be activated.

[0073] The program set in the electrical control box 10 executes an air outlet control method for an air conditioner according to this embodiment, as shown in Figure 3, including the following steps:

[0074] S1: Obtain the outlet air temperature and ambient temperature of each indoor fan at the set sampling frequency.

[0075] The set sampling frequencies include the temperature sampling frequency during charging and the temperature sampling frequency during idle time.

[0076] S2: Control the switching between the return air vent and the fresh air vent based on the comparison between the detected outlet air temperature and the ambient temperature.

[0077] When the outlet air temperature of all indoor fans exceeds the ambient temperature, switch to the fresh air inlet and close the return air inlet; when the outlet air temperature of an indoor unit is lower than the ambient temperature, close the fresh air inlet and switch to the return air inlet.

[0078] S3: Control the air conditioning frequency based on the detected temperature and the charging status of the charging pile.

[0079] When the fresh air vent is open, the air conditioner frequency is 0.

[0080] When the return air vent is open, the air conditioning frequency is controlled based on the collected temperature data and the charging pile status.

[0081] Determine if the charging station is currently charging; if so, proceed to adjust the air conditioning frequency during charging hours; otherwise, proceed to adjust the air conditioning frequency during off-peak hours.

[0082] The frequency adjustment process for the rechargeable air conditioner is as follows:

[0083]

[0084]

[0085] The process of adjusting the air conditioner frequency during off-peak hours is as follows:

[0086]

[0087] in, Air conditioning frequency during charging;

[0088] The frequency of air conditioning during off-peak hours;

[0089] The real-time temperature inside the charging station is collected;

[0090] The preset temperature value; The set rated temperature difference;

[0091] This refers to the maximum air conditioner frequency during charging.

[0092] Optimal air conditioning frequency during charging

[0093] N is the frequency adjustment level;

[0094] [·] indicates rounding.

[0095] The set temperature sampling frequency is adjusted according to the air conditioner frequency; the adjustment process of the temperature sampling frequency during charging is as follows:

[0096]

[0097] in, The temperature sampling frequency during charging;

[0098] The set temperature sampling frequency value during charging;

[0099] This represents the average historical air conditioning frequency.

[0100] The process for adjusting the idle temperature sampling frequency is as follows:

[0101]

[0102] in, The temperature sampling frequency during idle periods;

[0103] This is the set idle temperature sampling frequency value.

[0104] The air conditioning frequency is related to the temperature sampling frequency. Adjusting the temperature sampling frequency according to the air conditioning frequency will make the two compatible. This will not only avoid collecting too much useless data and wasting energy, but also ensure that all useful data is collected and avoid data omission.

[0105] This embodiment adjusts the air conditioning power based on the charging pile's operating status and ambient temperature, allowing the unit to operate at its optimal level.

[0106] The most energy-efficient operating state is achieved, thereby reducing the unit's power consumption.

[0107] Example 2:

[0108] This embodiment describes an air conditioning duct structure that improves the structure at the indoor fan outlet.

[0109] A water seal is provided along the edge of the outlet of indoor fan 1.

[0110] A water seal layer isolates the interior of the indoor unit from the space of the charging equipment, reducing the area requiring cooling; simultaneously, the water seal layer further ensures the temperature of the air outlet. An insulation layer should be installed above the water seal layer to prevent the evaporation of the liquid in the water seal layer from affecting the charging equipment.

[0111] The bottom of the water seal layer is connected to the liquid pipe, and a single-osmotic membrane running from the inside out is installed at the connection point. In practice, a drain port is installed at the top of the water seal layer to drain any excessively high liquid levels, ensuring the normal operation of the single-osmotic membrane.

[0112] The temperature of the water seal layer is close to the ambient temperature, and the temperature of the liquid in the liquid pipe is close to the temperature inside the indoor unit. When the ambient temperature is higher than the outlet temperature, the density of the water seal layer is less than the density of the liquid pipe, and the liquid can seep out from the single permeation membrane. Conversely, the liquids on both sides do not interact.

[0113] The direction of liquid flow on both sides can be used to determine the difference between ambient temperature and outlet air temperature, which can be corroborated with the data from the temperature sensor and used as a basis for switching between return air and fresh air inlets.

[0114] The solution in this embodiment only optimizes the structure of the indoor fan outlet; all other aspects are the same as in Embodiment 1.

[0115] It should be understood that the embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An air duct structure of an air conditioner, comprising a split indoor unit and an outdoor unit, the indoor unit and the outdoor unit being connected to each other by an air pipe (2) and a liquid pipe (3), characterized in that The indoor unit includes: Indoor fans (1) are respectively installed below one side of the equipment to be cooled; The refrigeration circuit, the gas circuit connected to the gas pipe (2) and the liquid circuit connected to the liquid pipe (3) provide cooling for the air output of the indoor fan (1) through the evaporator (9); Return air / fresh air inlet: Switch between return air inlet and fresh air inlet based on the outlet air temperature of the indoor fan; Temperature sensors are used to detect the air outlet temperature and ambient temperature at the air outlet of each indoor fan (1); The electrical control box (10) controls the switching of the return air vent and the fresh air vent based on the detected air outlet temperature and ambient temperature combined with the charging status of the charging station, and adjusts the air conditioning frequency. When the fresh air vent is open, the air conditioner frequency is 0. When the return air vent is open, the air conditioning frequency is controlled based on the collected temperature data and the charging pile status. Determine if the charging station is currently charging; if so, proceed to adjust the air conditioning frequency during charging hours; otherwise, proceed to adjust the air conditioning frequency during off-peak hours. The set sampling frequency includes the temperature sampling frequency during charging and the temperature sampling frequency during idle time; the set temperature sampling frequency is adjusted according to the air conditioning frequency.

2. The duct structure of an air conditioner according to claim 1, wherein The gas circuit is connected to the evaporator (9) via the gas pipe (2) connected to the outdoor unit, through the compressor (4) and the gas-liquid separator (5); the liquid circuit is connected to the evaporator (9) via the liquid pipe (3) connected to the outdoor unit, through the liquid receiver (6), the dryer filter (7) and the expansion valve (8).

3. The duct structure of an air conditioner according to claim 1 or 2, characterized in that The electrical control box (10) is located at the return air / fresh air inlet.

4. The duct structure of an air conditioner according to claim 1 or 2, characterized in that A water seal layer is provided along the edge of the outlet of the indoor fan (1); An isolation layer should be installed above the water seal layer.

5. The duct structure of an air conditioner according to claim 4, wherein The bottom of the water seal layer is connected to the liquid pipe, and a single-permeable membrane is provided at the connection between the bottom of the water seal layer and the liquid pipe from the inside out.

6. The duct structure of an air conditioner according to claim 1, wherein An air particle detector is installed at the fresh air inlet. When the concentration of air particles detected by the air particle detector is greater than the set concentration threshold, the fresh air inlet is normally closed.

7. An air outlet control method of an air conditioner using the air duct structure according to any one of claims 1 to 6, characterized by This includes the following steps: S1: Obtain the outlet air temperature and ambient temperature of each indoor fan at the set sampling frequency; S2: Control the switching between the return air vent and the fresh air vent based on the comparison between the detected outlet air temperature and the ambient temperature. When the outlet air temperature of all indoor fans exceeds the ambient temperature, switch to the fresh air vent and close the return air vent. When the outlet air temperature of the indoor unit is lower than the ambient temperature, close the fresh air inlet and switch to the return air inlet; S3: Control the air conditioning frequency based on the detected temperature and the charging status of the charging pile; Determine if the charging station is currently charging; if so, proceed to adjust the air conditioning frequency during charging; otherwise, proceed to adjust the air conditioning frequency during off-peak hours.

8. The air outlet control method of an air conditioner according to claim 7, characterized in that , The frequency adjustment process for the rechargeable air conditioner is as follows: The process of adjusting the air conditioner frequency during off-peak hours is as follows: wherein, is the air conditioning frequency when charging; Idle air conditioning frequency; To collect the real-time temperature in the charging station; a predetermined temperature threshold; for a set temperature difference; is the maximum air conditioner frequency during charging; for the minimum air conditioner frequency when charging; N is the frequency adjustment level; [·] indicates rounding. 9.The air outlet control method of an air conditioner according to claim 8, characterized in that The process of adjusting the temperature sampling frequency during charging is as follows: wherein, is the temperature sampling frequency when charging; a set charging time temperature sampling frequency value; is the average historical air conditioning frequency; The process for adjusting the idle temperature sampling frequency is as follows: in, The temperature sampling frequency during idle periods; This is the set idle temperature sampling frequency value.

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