Thermosyphon beam air conditioning hybrid cooling system

Abstract

The utility model discloses a kind of thermosyphon beam air conditioner hybrid cooling systems, comprising: control device, and with the signal of the control device signal connection thermosyphon beam air conditioner, vertical cross flow fan and vertical temperature difference measuring rod;First temperature sensor, second temperature sensor and third temperature sensor respectively for measuring ambient temperature, first temperature and second temperature are equipped on the vertical temperature difference measuring rod;The control device is used to control the thermosyphon beam air conditioner work based on the ambient temperature, and also be used to determine vertical temperature difference based on the first temperature and the second temperature, and according to the vertical temperature difference control vertical cross flow fan work.The utility model effectively suppresses the vertical temperature difference of working area by introducing floor-mounted vertical cross flow fan and combining control device, improves user satisfaction.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning control technology, and in particular to a thermosiphon beam air conditioning hybrid cooling system. Background Technology

[0002] Thermosiphon beam air conditioners use a bottom-discharge airflow method, making full use of the buoyancy effect of displacement ventilation. However, in cooling mode, because cold air naturally sinks, it easily accumulates at ankle height, and the large vertical temperature difference can lead to a "hot head, cold feet" phenomenon, affecting user comfort.

[0003] Thermosiphon effect: This effect utilizes the density change of a fluid (usually a refrigerant or air) due to temperature differences, creating a natural circulation flow to transfer heat. The hotter fluid rises, and the colder fluid sinks; this process does not require mechanical pumps, thus reducing energy consumption.

[0004] Wall-adhering effect: This refers to the characteristic of airflow tending to adhere to and flow along flat surfaces (such as ceilings or walls) when exiting an air outlet. This helps to better distribute the airflow, avoids direct airflow onto people causing discomfort, and effectively carries hot air to where it is needed. Summary of the Invention

[0005] This invention addresses the drawback of existing thermosiphon beam air conditioning systems, which suffer from stratification of the indoor thermal environment, resulting in a "hot head, cold feet" phenomenon. It provides a thermosiphon beam air conditioning hybrid cooling system that suppresses vertical temperature differences, thereby improving the comfort of indoor occupants.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A thermosiphon beam air conditioning hybrid cooling system includes a control device, a thermosiphon beam air conditioner, a vertical crossflow fan, and a vertical temperature difference measuring rod that are signal-connected to the control device;

[0008] The vertical temperature difference measuring rod is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor, all of which are connected to the control device via signals.

[0009] The first temperature sensor is used to measure the ambient temperature;

[0010] The second temperature sensor is located in the lower half of the vertical temperature difference measuring rod and is used to measure the first temperature;

[0011] The third temperature sensor is located on the upper part of the vertical temperature difference measuring rod and is used to measure the second temperature;

[0012] The control device is used to control the operation of the thermosiphon beam air conditioner based on the ambient temperature, and is also used to determine the vertical temperature difference based on the first temperature and the second temperature, and control the operation of the vertical crossflow fan according to the vertical temperature difference.

[0013] As one possible implementation method:

[0014] The control device includes a difference calculation unit, a first feedback controller, and a second feedback controller;

[0015] The first feedback controller is used to perform fuzzy PI control on the thermosiphon beam air conditioner based on the ambient temperature and a preset temperature setpoint.

[0016] The difference calculation unit is used to calculate the temperature difference between the first temperature and the second temperature to obtain the corresponding vertical temperature difference;

[0017] The second feedback controller is used to perform PI control on the vertical crossflow fan based on the vertical temperature difference and a preset temperature difference setpoint.

[0018] As one possible implementation method:

[0019] The control device further includes a temperature adjustment unit, which is used to receive externally transmitted adjustment commands, update the temperature setpoint according to the adjustment commands, and send the updated temperature setpoint to the first feedback controller.

[0020] As one possible implementation method:

[0021] The first temperature sensor is located at a height of 1.1m;

[0022] The second temperature sensor is located at a height of 0.1m;

[0023] The third temperature sensor is located at a height of 1.7m.

[0024] As one possible implementation method:

[0025] There are multiple vertical temperature difference measuring rods.

[0026] As one possible implementation method:

[0027] The thermosiphon beam air conditioner includes a chilled water regulating valve and a built-in fan at the air conditioner terminal.

[0028] The first feedback controller controls the opening of the chilled water regulating valve and the speed of the built-in fan in the air conditioning terminal through a 0-10V analog voltage signal;

[0029] The second feedback controller controls the speed of the vertical crossflow fan through a 0-10V analog voltage signal.

[0030] As one possible implementation method:

[0031] The vertical crossflow fan is installed on the floor, and the height of its top surface does not exceed the preset layer height.

[0032] As one possible implementation method:

[0033] The vertical crossflow fan is installed on the floor against the wall at the corner of the room, and the air inlet and outlet of the vertical crossflow fan are located on its side wall, with the air inlet and outlet directions at 90°.

[0034] The beneficial effects of this utility model are as follows: by introducing a floor-mounted vertical crossflow fan and combining it with a control device, the vertical temperature difference in the working area of ​​the thermosiphon beam air conditioner in cooling mode is effectively suppressed, significantly improving the comfort problem of "hot head and cold feet". Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the module connection of the thermosiphon beam air conditioning hybrid cooling system of this utility model;

[0037] Figure 2 This is a schematic diagram of the flow chart of the thermosiphon beam air conditioning hybrid cooling system of this utility model;

[0038] Figure 3 This is a schematic diagram of the installation layout and airflow path of the thermosiphon beam air conditioner and the vertical crossflow fan of this utility model. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0040] This utility model provides a thermosiphon beam air conditioning hybrid cooling system to suppress vertical temperature differences and improve the problem of large vertical temperature differences in the indoor environment of thermosiphon beam air conditioning systems; such as Figure 1 As shown, it includes a control device 1, a thermosiphon beam air conditioner 2, a vertical crossflow fan 3, and a vertical temperature difference measuring rod 4, all connected to the control device 1.

[0041] like Figure 2 As shown, the thermosiphon beam air conditioning hybrid cooling system specifically includes the following:

[0042] The thermosiphon beam air conditioner 2 includes a chilled water regulating valve 21 and a built-in fan 22 at the air conditioner terminal.

[0043] The number of the vertical temperature difference measuring rods 4 is one or more;

[0044] The vertical temperature difference measuring rod 4 is equipped with a first temperature sensor 41, a second temperature sensor 42 and a third temperature sensor 43, all of which are connected to the control device 1 via signals.

[0045] The first temperature sensor 41 is used to measure the ambient temperature;

[0046] The second temperature sensor 42 is located in the lower half of the vertical temperature difference measuring rod and is used to measure the first temperature;

[0047] The third temperature sensor 43 is located on the upper part of the vertical temperature difference measuring rod and is used to measure the second temperature.

[0048] When there is only one vertical temperature difference measuring rod 4, the temperature detected by the first temperature sensor 41 is directly taken as the ambient temperature, and the temperature difference between the first temperature and the second temperature is directly taken as the vertical temperature difference.

[0049] When there are multiple vertical temperature difference measuring rods 4, the temperatures detected by each first temperature sensor 41 are averaged, and the resulting average temperature is taken as the ambient temperature. The temperature differences between the first and second temperatures corresponding to each vertical temperature measuring rod 4 are averaged, and the resulting average temperature difference is taken as the vertical temperature difference. In this embodiment,

[0050] The first temperature sensor 41 is located at a height of 1.1m;

[0051] The second temperature sensor 42 is located at a height of 0.1m;

[0052] The third temperature sensor 43 is located at a height of 1.7m.

[0053] To address the issue of large vertical temperature differences and the "hot head, cold feet" problem experienced by occupants in the cooling mode of a thermosiphon beam air conditioner, this invention provides a hybrid cooling system for thermosiphon beam air conditioners. The system includes the thermosiphon beam air conditioner 2, employing passive cooling technology, and a mechanical auxiliary device, namely the vertical crossflow fan 3, which uses active mechanical cooling. The thermosiphon beam air conditioner 2 and the vertical crossflow fan 3 are used together to form a hybrid cooling system, optimizing the cooling effect.

[0054] The vertical crossflow fan 3 is installed on the ground, and the height of its top surface does not exceed the preset layer height;

[0055] The preset layer height, i.e. the height limit of the effective range of the vertical crossflow fan 3, avoids unnecessary mixing of airflow in non-effective range areas by the vertical crossflow fan 3, resulting in energy waste.

[0056] Those skilled in the art can determine the specific setting of the preset layer height according to actual needs. In this embodiment, the preset layer height is set to the conventional personnel working area, i.e., 2 meters high.

[0057] Furthermore, the vertical crossflow fan 3 has a wide airflow characteristic, such as... Figure 3 As shown, the specific installation method is as follows:

[0058] Vertical wall mounting:

[0059] By utilizing the airflow wall-adhering effect, the outgoing airflow adheres to the wall surface and extends, avoiding direct airflow onto the human working area;

[0060] Installed in the corner of the room:

[0061] A diagonal diffusion flow field is formed by the dual constraints of adjacent walls, eliminating dead zones in the airflow.

[0062] The air inlet and outlet of the vertical crossflow fan 3 are located on the side wall of the vertical crossflow fan 3 and the air inlet and outlet directions are 90°.

[0063] By utilizing the airflow wall-adhering effect and the unique airflow path characteristic of the vertical crossflow fan 3, which has an inlet and outlet direction of 90°, the airflow is introduced along one side of the wall and sent out horizontally along the other side of the wall.

[0064] The above installation method effectively enhances the entrainment of surrounding air, improving airflow mixing efficiency and temperature uniformity under low wind speed conditions.

[0065] The aforementioned airflow wall-attaching effect refers to the physical phenomenon where a fluid jet, due to viscosity, entrains surrounding fluid, causing a decrease in pressure near the wall, thereby generating an adsorption force that causes the jet to deviate from its original direction and adhere to the adjacent wall surface, extending its flow.

[0066] In this embodiment, both the built-in fan 22 at the air conditioner terminal and the vertical crossflow fan 3 are crossflow fans, and the vertical crossflow fan 3 is a vertically installed crossflow fan.

[0067] Specifically, the control device 1 includes the following:

[0068] Difference calculation unit 11, first feedback controller 12, second feedback controller 13 and temperature regulation unit 14;

[0069] The first feedback controller 12 and the second feedback controller 13 can be implemented using a 32-bit microcontroller based on an ARM Cortex-M core, such as the STM32 series. This controller receives signals from the first temperature sensor 41, the second temperature sensor 42, and the third temperature sensor 43 through its built-in peripheral interface, and executes a control algorithm based on the processor core. It outputs a 0–10V analog voltage signal through a digital-to-analog converter channel to achieve precise control of the thermosiphon beam air conditioner 2 and the vertical crossflow fan 3. The first feedback controller 12 is used to perform fuzzy PI control on the thermosiphon beam air conditioner 2 based on the ambient temperature and a preset temperature setpoint; those skilled in the art can determine the preset temperature setpoint according to meteorological conditions and actual needs.

[0070] The difference calculation unit 11 is used to calculate the temperature difference between the first temperature and the second temperature to obtain the corresponding vertical temperature difference.

[0071] The second feedback controller 13 is used to perform PI control on the vertical crossflow fan 3 based on the vertical temperature difference and the preset temperature difference setting value;

[0072] Those skilled in the art can set the temperature difference setpoint according to actual needs. For example, it can be obtained based on experimental methods or fluid dynamics simulation. Specifically, through simulation or experimental means, the mixing ability of the vertical crossflow fan 3 on the indoor temperature field and the suppression effect of vertical temperature difference at different speeds can be analyzed. Based on this, the optimal vertical temperature difference value that combines thermal comfort and energy saving can be selected as the preset temperature difference setpoint, thereby ensuring the rationality of the control target and the engineering practicality. This specification does not require detailed limitation on the temperature difference setpoint.

[0073] The temperature regulation unit 14 is used to receive external transmission regulation commands, update the temperature setpoint according to the regulation commands, and send the updated temperature setpoint to the first feedback controller 12.

[0074] More specifically, the adjustment command is set manually based on actual needs, or optimized by an external host computer based on existing temperature optimization algorithms.

[0075] Furthermore, based on actual needs or based on existing temperature optimization algorithms, people issue adjustment commands. The temperature adjustment unit 14 receives the adjustment commands, updates the temperature setpoint, and inputs it to the first feedback controller 12.

[0076] The adjustment commands include heating commands, cooling commands, and temperature setting commands;

[0077] The temperature setting command is issued by an external host computer or manually, directly giving the target temperature setting value. The temperature adjustment unit 14 executes the temperature setting command and updates the temperature setting value.

[0078] When the human body feels too hot, an external host computer or a person generates a cooling command and sends it to the temperature regulation unit 14. The temperature regulation unit 14 executes the cooling command and updates the temperature setting value.

[0079] When a person feels cold, an external host computer or a human generates a heating command and sends it to the temperature regulation unit 14. The temperature regulation unit 14 executes the heating command and updates the temperature setting value.

[0080] The first feedback controller 12 outputs a 0–10V analog voltage signal to the analog output channel connected to the chilled water regulating valve 21 and the built-in fan 22 of the thermosiphon beam air conditioner, thereby adjusting the valve opening of the chilled water regulating valve 21 and the speed of the built-in fan 22.

[0081] The second feedback controller 13 outputs a 0–10V analog signal to the speed control port of the vertical crossflow fan 3 to achieve stepless speed regulation of the vertical crossflow fan 3;

[0082] Furthermore, in order to avoid unnecessary airflow mixing and energy waste caused by the vertical crossflow fan 3 in areas outside the preset layer height, those skilled in the art can set the maximum allowable airflow of the vertical crossflow fan 3 based on spatial airflow organization simulation or actual measurement data, and accordingly set an upper limit for the analog voltage signal output to the vertical crossflow fan 3 in the second feedback controller 13 to ensure that the actual speed does not exceed the limit.

[0083] The maximum permissible air volume in this embodiment is 630m³. 3 / h corresponds to an upper limit of 6V for the analog voltage signal output and an upper limit of 1200rpm for the rotational speed.

[0084] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0085] It should be noted that:

[0086] The phrase "an embodiment" or "an embodiment" used in this specification means that a specific feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrase "an embodiment" or "an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0087] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0088] Furthermore, it should be noted that the shapes and names of the parts and components described in the specific embodiments described in this specification may differ. All equivalent or simple variations made to the structure, features, and principles described in this utility model patent concept are included within the protection scope of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined in these claims, all of which should fall within the protection scope of this utility model.

Claims

1. A thermosiphon beam air conditioning hybrid cooling system, characterized in that, It includes a control device, as well as a thermosiphon beam air conditioner, a vertical crossflow fan, and a vertical temperature difference measuring rod that are signal-connected to the control device; The vertical temperature difference measuring rod is equipped with a first temperature sensor, a second temperature sensor, and a third temperature sensor, all of which are connected to the control device via signals. The first temperature sensor is used to measure the ambient temperature; The second temperature sensor is located in the lower half of the vertical temperature difference measuring rod and is used to measure the first temperature; The third temperature sensor is located on the upper part of the vertical temperature difference measuring rod and is used to measure the second temperature; The control device is used to control the operation of the thermosiphon beam air conditioner based on the ambient temperature, and is also used to determine the vertical temperature difference based on the first temperature and the second temperature, and control the operation of the vertical crossflow fan according to the vertical temperature difference.

2. The thermosiphon beam air conditioning hybrid cooling system according to claim 1, characterized in that: The control device includes a difference calculation unit, a first feedback controller, and a second feedback controller; The first feedback controller is used to perform fuzzy PI control on the thermosiphon beam air conditioner based on the ambient temperature and a preset temperature setpoint. The difference calculation unit is used to calculate the temperature difference between the first temperature and the second temperature to obtain the corresponding vertical temperature difference; The second feedback controller is used to perform PI control on the vertical crossflow fan based on the vertical temperature difference and a preset temperature difference setpoint.

3. The thermosiphon beam air conditioning hybrid cooling system according to claim 2, characterized in that: The control device further includes a temperature adjustment unit, which is used to receive externally transmitted adjustment commands, update the temperature setpoint according to the adjustment commands, and send the updated temperature setpoint to the first feedback controller.

4. The thermosiphon beam air conditioning hybrid cooling system according to any one of claims 1 to 3, characterized in that: The first temperature sensor is located at a height of 1.1m; The second temperature sensor is located at a height of 0.1m; The third temperature sensor is located at a height of 1.7m.

5. The thermosiphon beam air conditioning hybrid cooling system according to claim 4, characterized in that: There are multiple vertical temperature difference measuring rods.

6. The thermosiphon beam air conditioning hybrid cooling system according to claim 2, characterized in that: The thermosiphon beam air conditioner includes a chilled water regulating valve and a built-in fan at the air conditioner terminal. The first feedback controller controls the opening of the chilled water regulating valve and the speed of the built-in fan in the air conditioning terminal through a 0-10V analog voltage signal; The second feedback controller controls the speed of the vertical crossflow fan through a 0-10V analog voltage signal.

7. The thermosiphon beam air conditioning hybrid cooling system according to claim 1, characterized in that: The vertical crossflow fan is installed on the floor, and the height of its top surface does not exceed the preset layer height.

8. The thermosiphon beam air conditioning hybrid cooling system according to claim 1, characterized in that: The vertical crossflow fan is installed on the floor against the wall at the corner of the room, and the air inlet and outlet of the vertical crossflow fan are located on its side wall, with the air inlet and outlet directions at 90°.

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