Self-preheating freeze-proof air supply unit

Abstract

The utility model relates to air supply device technical field, the technical problem that the utility model solves is high energy consumption, weak anti -freezing ability. In order to solve the above technical problem, the utility model provides a kind of self-preheating anti-freezing air supply unit. The utility model includes prefilter module, air supply module, heat exchange module and temperature monitoring module. The front and rear ends of heat exchange module are communicated with prefilter module and air supply module respectively;Cross-flow heat exchange core, primary hot water coil pipe and secondary hot water coil pipe are provided in heat exchange module, and new air automatic control device is arranged at the communication of heat exchange body and prefilter module;Temperature monitoring module includes first temperature sensor, second temperature sensor, first temperature sensor is interlocked with the air volume of the air entering heat exchange module Control;Second temperature sensor is interlocked with secondary hot water coil pipe control. The utility model preheats the air entering through heat exchange module, solves the freezing, low energy efficiency and other problems of traditional equipment in low temperature environment.

Description

Technical Field

[0001] This utility model relates to the field of air supply device technology, and in particular to a self-preheating and antifreeze air supply unit. Background Technology

[0002] In cold regions or low-temperature environments, large factories need to address two key issues when supplying air in winter: achieving the required air supply temperature (to avoid excessively low indoor temperatures) and ensuring equipment operational reliability (to prevent freezing of pipes, fans, and other equipment). Heating units typically employ technologies such as electric heating, hot water exchange, and air heat pumps to increase the air supply temperature. Traditional electric heating air supply units: directly heat the air with an electric heater, and then a fan delivers the hot air to the target space. Traditional hot water exchange air supply units: achieve heat transfer between two fluids at different temperatures through a hot water exchanger. The core principle is to use the heat from the high-temperature fluid to heat the low-temperature fluid, achieving heating, and then a fan delivers the hot air to the target space. Traditional air heat pump air supply units: through the phase change process of the refrigerant in the evaporator, compressor, condenser, and expansion valve, they absorb low-grade heat energy from the air and release it as high-grade heat energy, ultimately delivering hot air to the target space via a fan.

[0003] Traditional electric heating air supply units, traditional hot water exchange air supply units, and traditional air heat pump air supply units, under the background of self-preheating and antifreeze air supply units, each have the following technical defects: high energy consumption; weak antifreeze capability and poor low temperature adaptability. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the above-mentioned problems existing in the prior art.

[0005] To solve the above technical problems, this utility model provides a self-preheating and antifreeze air supply unit, comprising:

[0006] The pre-filter module has an air inlet at the front end of the pre-filter body;

[0007] An air supply module includes an air supply body, an air outlet, and an air supply fan; the air outlet is located at the end of the air supply body; the air supply fan is located in the air supply body; in some embodiments, the air outlet is located at the top of the air supply body.

[0008] The heat exchange module includes a heat exchange body and a cross-flow heat exchange core, a primary hot water coil, and a secondary hot water coil disposed within the heat exchange body. The front and rear ends of the heat exchange body are connected to a pre-filter module and an air supply module, respectively. A fresh air automatic control device is installed at the connection point between the heat exchange body and the pre-filter module. The cross-flow heat exchange core has a first flow channel and a second flow channel that are not interconnected but can exchange heat. The air inlet of the first flow channel is connected to the pre-filter module, the air outlet of the first flow channel is connected to the air inlet of the second flow channel, and the air outlet of the second flow channel is connected to the air supply body. The primary hot water coil is positioned near the air inlet of the second flow channel; the secondary hot water coil is positioned near the air outlet of the second flow channel. The side wall of the heat exchange body is provided with inlet and outlet ports connected to the primary hot water coil and the secondary hot water coil, respectively.

[0009] The temperature monitoring module includes a first temperature sensor and a second temperature sensor; the first temperature sensor is located at the front end of the primary hot water coil and is interlocked with the fresh air automatic control device; the second temperature sensor is located at the rear end of the secondary hot water coil and is interlocked with the secondary hot water coil.

[0010] In one embodiment of this utility model, a fresh air inlet and an air supply outlet are respectively provided at the front and rear ends of the heat exchange body; the heat exchange body is connected to the pre-filter module through the fresh air inlet, and the heat exchange body is connected to the air supply module through the air supply outlet; the fresh air automatic control device is set at the fresh air inlet, and the fresh air automatic control device is an electric air valve.

[0011] In one embodiment of this utility model, the application further includes a control unit; the control unit is electrically connected to the first temperature sensor, the second temperature sensor, the fresh air automatic control device, and the primary hot water coil and the secondary hot water coil.

[0012] In one embodiment of this utility model, the application further includes a third temperature sensor, which is disposed at the rear end of the pre-filter module.

[0013] In one embodiment of this utility model, the heat exchange module further includes multiple air cavity partitions disposed in the heat exchange body, and the cross-flow heat exchange core is connected to the air cavity partitions; the multiple air cavity partitions divide the heat exchange body into a first chamber, a second chamber, and a third chamber; the air inlet end of the first flow channel is connected to the first chamber; the air outlet end of the first flow channel is connected to the second chamber; the air outlet end of the second flow channel is connected to the third chamber; the first chamber is connected to the pre-filter body; and the third chamber is connected to the air supply body.

[0014] In one embodiment of this utility model, there are four air cavity partitions, which are arranged in a cross pattern to divide the heat exchange body into four sections; two sections form a first chamber and a second chamber, respectively; and the air cavity partition between the other two sections is provided with through holes for connecting the two sections to form a second chamber.

[0015] In one embodiment of the present invention, the air supply module further includes a reserved filter disposed in the air supply body; the reserved filter is disposed on the front side of the air supply fan.

[0016] In one embodiment of the present invention, the pre-filter module includes a pre-filter body, a self-cleaning filter and a sand-discharging fan disposed in the pre-filter body, and the sand-discharging fan is disposed at the bottom of the self-cleaning filter.

[0017] In one embodiment of the present invention, the pre-filter module further includes at least one of a rain cover and a bird net; the rain cover is disposed on the front side of the air inlet; the bird net is disposed on the front side of the air inlet.

[0018] In one embodiment of this utility model, a ash discharge port is provided on one side of the pre-filter body.

[0019] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art:

[0020] The self-preheating and antifreeze air supply unit of this utility model has the following characteristics: First, the primary hot water coil heats the airflow before it enters the second flow channel. The next airflow entering the first flow channel exchanges heat with the already heated airflow in the second flow channel, thus preheating the next airflow entering the first flow channel. Second, the secondary hot water coil heats the airflow exiting the second flow channel a second time. Therefore, by using primary heating, preheating, and secondary heating, this invention solves the problems of freezing and low energy efficiency in traditional equipment at low temperatures, achieving a highly efficient, safe, and economical heating solution, especially suitable for extremely cold regions. A second temperature sensor monitors the outlet air temperature. The second temperature sensor is interlocked with the secondary hot water coil to adjust the hot water flow rate of the secondary hot water coil according to the outlet air temperature, thereby ensuring that the outlet air temperature meets the requirements. The first temperature sensor monitors the temperature of the airflow before it enters the primary hot water coil (i.e., the temperature after preheating in the first flow channel after passing through the cross-flow heat exchange core). The first temperature sensor is interlocked with the fresh air automatic control device. This reduces the amount of cold air entering when the intake air temperature is below a certain level, preventing excessive cold air from concentrating and causing insufficient hot water supply, which could lead to freezing and cracking of the primary hot water coil. This embodiment can monitor the temperature in real time and adjust the intake air volume and control the water flow to the primary hot water coil based on temperature changes, improving antifreeze performance, further enhancing the heating effect of the device, and making it more energy-efficient. Attached Figure Description

[0021] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0022] Figure 1 This is a top view of a self-preheating and antifreeze air supply unit according to a preferred embodiment of the present invention;

[0023] Figure 2 yes Figure 1 AA section view;

[0024] Figure 3 yes Figure 1 BB section view;

[0025] Explanation of reference numerals in the accompanying drawings: 100, pre-filter module; 110, pre-filter body; 111, dust discharge port; 120, self-cleaning filter; 130, sand removal fan; 140, air inlet; 150, rain cover; 160, bird net;

[0026] 200. Air supply module; 210. Air supply body; 220. Air outlet; 230. Air supply fan; 240. Reserved filter;

[0027] 300. Heat exchange module; 310. Heat exchange body; 311. First chamber; 312. Second chamber; 313. Third chamber; 314. Through hole; 320. Cross-flow heat exchange core; 330. Primary hot water coil; 340. Secondary hot water coil; 350. Fresh air inlet; 360. Air outlet; 370. Fresh air automatic control device; 380. Air cavity partition;

[0028] 400. First temperature sensor;

[0029] 500. Second temperature sensor;

[0030] 600. Third temperature sensor. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0032] Reference Figures 1-3 As shown, this utility model embodiment provides a self-preheating and antifreeze air supply unit, including:

[0033] The pre-filter module 100 includes a pre-filter body 110, a self-cleaning filter 120 and a sand-discharging fan 130 disposed in the pre-filter body 110, and the sand-discharging fan 130 is disposed at the bottom of the self-cleaning filter 120; the front end of the pre-filter body 110 is provided with an air inlet 140.

[0034] The air supply module 200 includes an air supply body 210, an air outlet 220, and an air supply fan 230; the air outlet 220 is located at the end of the air supply body 210; the air supply fan 230 is located in the air supply body 210; in some embodiments, the air outlet 220 is located at the top of the air supply body 210.

[0035] The heat exchange module 300 includes a heat exchange body 310 and a cross-flow heat exchange core 320, a primary hot water coil 330, and a secondary hot water coil 340 disposed within the heat exchange body 310. The front and rear ends of the heat exchange body 310 are connected to a pre-filter module 100 and an air supply module 200, respectively. A fresh air automatic control device 370 is installed at the connection point between the heat exchange body 310 and the pre-filter module 100. The cross-flow heat exchange core 320 contains a first flow that is not interconnected but can exchange heat. The heat exchanger 310 comprises a primary heat exchanger and a secondary heat exchanger. The primary heat exchanger 330 is located near the air inlet of the secondary heat exchanger 330 and the secondary heat exchanger 340 are located near the air outlet of the secondary heat exchanger 340. The heat exchanger 310 has inlet and outlet ports on its side walls, one for the primary heat exchanger 330 and the other for the secondary heat exchanger 340. A fresh air inlet 350 and an air outlet 360 are located at the front and rear ends of the heat exchanger 310, respectively.

[0036] The temperature monitoring module includes a first temperature sensor 400 and a second temperature sensor 500. The first temperature sensor 400 is located at the front end of the primary hot water coil 330 and is interlocked with the fresh air automatic control device 370. The second temperature sensor 500 is located at the rear end of the secondary hot water coil 340 and is interlocked with the secondary hot water coil 340.

[0037] Specifically, the self-cleaning filter 120 is used to filter the air entering the unit, and the sand-discharging fan 130 can discharge the sand and dust filtered by the self-cleaning filter 120. The air supply fan 230 (negative pressure) can drive the airflow of the entire unit. In this embodiment, the primary hot water coil 330 heats the airflow before it enters the second flow channel for the first time; and the next airflow entering the first flow channel exchanges heat with the airflow in the second flow channel that has already been heated for the first time, thereby preheating the next airflow entering the first flow channel; the secondary hot water coil 340 heats the airflow exiting the second flow channel for the second time. It can be seen that, through the primary heating, preheating, and secondary heating, the application solves the problems of freezing, low energy efficiency, and system complexity of traditional equipment in low-temperature environments, and realizes an efficient, safe, and economical heating solution, especially suitable for extremely cold regions. The second temperature sensor 500 is used to monitor the outlet air temperature of the air supply outlet 360. The second temperature sensor 500 is interlocked with the secondary hot water coil 340 to adjust the hot water flow into the secondary hot water coil 340 according to the outlet air temperature, thereby ensuring that the outlet air temperature meets the requirements. The first temperature sensor 400 is used to monitor the temperature of the airflow before it enters the primary hot water coil 330 (i.e., the temperature after preheating through the first flow channel of the cross-flow heat exchange core 320). The first temperature sensor 400 is interlocked with the airflow entering the heat exchange module 300, so that when the inlet air temperature is lower than a certain temperature, the amount of cold air entering is reduced to prevent excessively cold air from entering and freezing and cracking the primary hot water coil 330. This embodiment can monitor the temperature in real time, change the airflow according to temperature changes, control the water flow into the primary hot water coil 330, improve antifreeze performance, further improve the heating effect of the device, and save energy and reduce energy consumption.

[0038] Furthermore, the heat exchange module 300 also includes multiple air cavity partitions 380 disposed in the heat exchange body 310, and the cross-flow heat exchange core 320 is connected to the air cavity partitions 380; the multiple air cavity partitions 380 divide the heat exchange body 310 into a first chamber 311, a second chamber 312 and a third chamber 313; the air inlet end of the first flow channel is connected to the first chamber 311; the air outlet end of the first flow channel is connected to the second chamber 312; the air outlet end of the second flow channel is connected to the third chamber 313; the first chamber 311 is connected to the pre-filter body 110; and the third chamber 313 is connected to the air supply body 210.

[0039] There are four air cavity partitions 380, which are arranged in a cross pattern (for example, the four air cavity partitions 380 are arranged in a cross shape) to divide the heat exchange body 310 into four sections; two sections form the first chamber 311 and the second chamber 312 respectively; the air cavity partitions 380 between the other two sections are provided with through holes 314, which are used to connect the two sections to form the second chamber 312.

[0040] Specifically, in this embodiment, the cross-flow heat exchange core 320 is supported by the air cavity baffle 380, while the heat exchange body 310 is divided into different chambers to ensure the stability of the structure.

[0041] Furthermore, the fresh air inlet 350 is connected to the pre-filter module 100, and the air outlet 360 is connected to the air supply module 200; the fresh air automatic control device 370 is installed at the fresh air inlet 350, and the fresh air automatic control device 370 is an electric air valve.

[0042] Specifically, the fresh air control device 370 is used to control the air volume of the fresh air inlet 350.

[0043] Furthermore, the first temperature sensor 400 is interlocked with the fresh air automatic control device 370.

[0044] Specifically, it is used to monitor the temperature of the airflow before it enters the primary hot water coil 330 (i.e., the temperature after preheating through the first flow channel of the cross-flow heat exchange core 320). The first temperature sensor 400 is interlocked with the fresh air automatic control device 370. When the inlet air temperature is lower than a certain temperature, the opening of the fresh air automatic control device 370 is reduced to reduce the amount of cold air entering, preventing excessive cold air from entering and causing insufficient hot water supply, which could lead to freezing and cracking of the primary hot water coil 330.

[0045] In some embodiments, the second temperature sensor 500 is positioned near the air outlet 360.

[0046] Furthermore, this application also includes a control unit; the control unit is electrically connected to the inlet and outlet valves of the first temperature sensor 400, the second temperature sensor 500, the fresh air automatic control device 370, and the primary hot water coil 330 and the secondary hot water coil 340. In some embodiments, the control unit is also electrically connected to the third temperature sensor 600, the cross-flow heat exchange core 320, etc.

[0047] Specifically, in this embodiment, the control unit can realize the interlocking control between the first temperature sensor 400 and the fresh air automatic control device 370, as well as the interlocking control between the second temperature sensor 500 and the secondary hot water coil 340. Additionally, the control unit can control the switching of related components.

[0048] Furthermore, the temperature monitoring module also includes a third temperature sensor 600, which is disposed at the rear end of the pre-filter module 100. In some embodiments, the third temperature sensor 600 is disposed at the fresh air inlet 350.

[0049] Specifically, the third temperature sensor 600 in this embodiment can monitor the air intake temperature (i.e., outdoor ambient temperature) of the fresh air inlet 350 in real time.

[0050] Furthermore, the air supply module 200 also includes a reserved filter 240 disposed in the air supply body 210; the reserved filter 240 is disposed on the front side of the air supply fan 230.

[0051] Specifically, the reserved filter 240 in this embodiment can further filter the air outlet of this application.

[0052] Furthermore, the pre-filter module 100 also includes at least one of a rain cover 150 and a bird net 160; the rain cover 150 is located on the front side of the air inlet 140; the bird net 160 is located on the front side of the air inlet 140.

[0053] Specifically, this embodiment serves to prevent rain and birds from entering the application.

[0054] Furthermore, a dust discharge port 111 is provided on one side of the pre-filter body 110.

[0055] Specifically, the ash discharge port 111 is used for periodic cleaning and discharge of the filtered sand and dust.

[0056] This application addresses the operational shortcomings of traditional electric heating, hot water exchange, and air heat pump units in cold environments. Specifically, as follows:

[0057] The workflow of this application:

[0058] Outside air enters through air inlet 140 and is first filtered by pre-filter module 100;

[0059] After filtration, the air enters the first chamber 311 of the heat exchange module 300 through the fresh air inlet 350, and then enters the second chamber 312 through the first flow channel of the cross-flow heat exchange core 320.

[0060] In the second chamber 312, the air is first heated by the primary hot water coil 330 and then enters the cross-flow heat exchange core 320 again. It then enters the third chamber 313 through the second flow channel of the cross-flow heat exchange core 320. At the same time, the fresh air flowing through the first flow channel of the cross-flow heat exchange core 320 will exchange heat with the air that has been heated for the first time (i.e., the air that has been heated for the first time in the second flow channel), that is, the fresh air flowing through the first flow channel of the cross-flow heat exchange core 320 will be preheated.

[0061] The air entering the third chamber 313 is then heated again by the secondary hot water coil 340, enters the air supply module 200 through the air supply outlet 360, is filtered a second time by the reserved filter 240, and is finally discharged into the room through the air outlet 220.

[0062] How this application works:

[0063] The unit is equipped with a cross-flow heat exchange core 320. Fresh air enters the heat exchange module 300 after passing through the pre-filter module 100. After being heated by the primary hot water coil 330, the fresh air then passes through the cross-flow heat exchange core 320, exchanging heat with the fresh air continuing to flow through the first channel. This increases the temperature of the fresh air, eliminating the need for electric preheating and reducing energy consumption. The heat exchange module 300, using the cross-flow heat exchange core 320, preheats the fresh air flowing through the first channel, ensuring that the air temperature before entering the primary hot water coil 330 reaches above 2°C, effectively preventing the primary hot water coil 330 from freezing and meeting the -22°C fresh air antifreeze requirement. The fresh air is then further heated by the secondary hot water coil 340 to achieve the required indoor supply air temperature.

[0064] The first temperature sensor 400 is interlocked with the fresh air control device 370. The first temperature sensor 400 monitors the temperature of the airflow before it enters the primary hot water coil 330. When the air inlet temperature is lower than a certain temperature, the opening angle of the fresh air control device 370 is reduced to reduce the amount of cold air entering. This prevents excessive cold air from entering and causing insufficient hot water supply, which could lead to the freezing and cracking of the primary hot water coil 330, thus further improving the unit's antifreeze performance.

[0065] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A self-preheating and antifreeze air supply unit, characterized in that: include: A pre-filter module, wherein the front end of the pre-filter body is provided with an air inlet; An air supply module includes an air supply body, an air outlet, and an air supply fan; the air outlet is located at the end of the air supply body; the air supply fan is located inside the air supply body. A heat exchange module includes a heat exchange body and a cross-flow heat exchange core, a primary hot water coil, and a secondary hot water coil disposed within the heat exchange body. The front and rear ends of the heat exchange body are respectively connected to a pre-filter module and an air supply module. A fresh air automatic control device is provided at the connection point between the heat exchange body and the pre-filter module. The cross-flow heat exchange core has a first flow channel and a second flow channel that are not interconnected but can exchange heat. The air inlet end of the first flow channel is connected to the pre-filter module, the air outlet end of the first flow channel is connected to the air inlet end of the second flow channel, and the air outlet end of the second flow channel is connected to the air supply body. The primary hot water coil is disposed near the air inlet end of the second flow channel; the secondary hot water coil is disposed near the air outlet end of the second flow channel. The temperature monitoring module includes a first temperature sensor and a second temperature sensor; the first temperature sensor is located at the front end of the primary hot water coil and is interlocked with the fresh air automatic control device; the second temperature sensor is located at the rear end of the secondary hot water coil and is interlocked with the secondary hot water coil.

2. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: The heat exchange body is provided with a fresh air inlet and an air supply outlet at its front and rear ends, respectively; the heat exchange body is connected to the pre-filter module through the fresh air inlet, and the heat exchange body is connected to the air supply module through the air supply outlet; the fresh air automatic control device is located at the fresh air inlet, and the fresh air automatic control device is an electric air valve.

3. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: It also includes a control unit; the control unit is electrically connected to the first temperature sensor, the second temperature sensor, the fresh air automatic control device, and the primary hot water coil and the secondary hot water coil.

4. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: The heat exchange module further includes multiple air cavity partitions disposed in the heat exchange body, and the cross-flow heat exchange core is connected to the air cavity partitions; the multiple air cavity partitions divide the heat exchange body into a first chamber, a second chamber, and a third chamber; the air inlet end of the first flow channel is connected to the first chamber; the air outlet end of the first flow channel is connected to the second chamber; the air outlet end of the second flow channel is connected to the third chamber; the first chamber is connected to the pre-filter body; and the third chamber is connected to the air supply body.

5. The self-preheating and antifreeze air supply unit according to claim 4, characterized in that: There are four air cavity partitions, which are arranged in a cross pattern to divide the heat exchange body into four sections; two of the sections form the first chamber and the second chamber, respectively; and the air cavity partition between the other two sections is provided with a through hole, which is used to connect the two sections to form the second chamber.

6. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: The temperature monitoring module also includes a third temperature sensor, which is located at the rear end of the pre-filter module.

7. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: The air supply module also includes a reserved filter disposed in the air supply body; the reserved filter is disposed on the front side of the air supply fan.

8. The self-preheating and antifreeze air supply unit according to claim 1, characterized in that: The pre-filter module includes a pre-filter body, a self-cleaning filter and a sand-discharging fan disposed in the pre-filter body, and the sand-discharging fan is disposed at the bottom of the self-cleaning filter.

9. The self-preheating and antifreeze air supply unit according to claim 8, characterized in that: The pre-filter module further includes at least one of a rain cover and a bird net; the rain cover is located on the front side of the air inlet; the bird net is located on the front side of the air inlet.

10. The self-preheating and antifreeze air supply unit according to claim 8, characterized in that: The pre-filter body has a dust discharge port on one side.

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