Adjustable total heat exchange device

Abstract

The utility model relates to an adjustable total heat exchange device which is characterized in that a total heat exchange core is arranged in a middle partition bin of a shell box body, an air supply port and an air return port facing indoors are formed in one side of the middle partition bin of the shell box body, and an air exhaust port and an air inlet facing outdoors are formed in the other side of the middle partition bin of the shell box body; the air ducts on the inner sides of the air ports independently communicate with the total heat exchange core. According to the device, a plurality of adjusting valves are distributed in respective inner cavities of an air inlet and an air outlet and on a partition plate between an air inlet channel and an air outlet channel, and each adjusting valve is independently controlled to be opened and closed and guides the direction of airflow in each air channel. According to the device, the on-off states of the air ducts can be switched and the air flow can be adjusted according to application requirements through the adjusting valves mounted and connected at specific positions, so that different operation modes such as total heat exchange, internal circulation, air mixing, one-way flow air supply and one-way flow air exhaust can be freely switched, and the application range and the working environment of the device are expanded.

Description

Technical Field

[0001] The utility model relates to an indoor and outdoor ventilation device, in particular to a total heat exchange device which is controlled to switch among multiple modes in multiple application scenarios and promotes indoor air change. Background Art

[0002] With the improvement of people's material life, the requirement for indoor air quality has also been significantly improved. Therefore, regular, quantitative and organized ventilation has been paid more and more attention by people and has become an important index for evaluating the grade of indoor environment. Especially in places where people gather, such as restaurants, meeting rooms, laboratories, hospitals, cinemas, shopping malls, gymnasiums, Internet cafes, etc., it is even more essential.

[0003] At present, two-way flow devices in the ventilation field are generally divided into two types. One is a simple two-way flow air supply duct, that is, two non-interfering air ducts, each with an independent power fan for air supply and exhaust. The other is a device with a heat exchange core. The core is isolated by a thin film material. Airflows at different temperatures in each air duct cross-exchange heat in the heat exchange core to achieve the goal of heat recovery and energy conservation. And some thin film materials can also allow water molecules to pass through while blocking the passage of air, enabling the exchange of water vapor (i.e., total heat exchange). However, the air flow organization in this kind of ventilation two-way flow device is relatively single. Either air supply / exhaust is carried out simultaneously to replenish the air in the enclosed space, or it is shut down. It lacks flexibility in responding to scenarios with more precise requirements for air flow organization. Especially when working in winter in cold regions in the north, the total heat core is extremely prone to internal frosting and freezing of the core due to low temperature problems, losing the heat exchange capacity, and even causing cross-flow of fresh air and exhaust air. Summary of the Invention

[0004] The purpose of the utility model is to provide an adjustable total heat exchange device, which can adjust the air supply and exhaust states of the device according to different application scenarios and can realize multiple operation modes.

[0005] To achieve the above purpose, the utility model provides the following technical solution: An adjustable total heat exchange device, in which a total heat exchange core is arranged in the middle partition of the outer shell box body. One side of the middle partition of the outer shell box body is set as an air supply port and a return air port facing the indoor, and the other side of the middle partition is set as an exhaust port and an air inlet port facing the outdoor. The air ducts inside each air port are independently connected to the total heat exchange core. In the inner cavities of the air inlet port and the exhaust port respectively, and on the partition between the air inlet channel and the exhaust channel, a number of regulating valves are distributed. Each regulating valve is independently controlled to open and close and guides the air flow direction in each air duct.

[0006] Further, a air supply filter screen is arranged in the air supply channel between the total heat exchange core and the air inlet port. It is defined that a first regulating valve is arranged in the inner cavity of the air inlet port, and the air supply channel is switched on and off and the air flow rate is adjusted by the first regulating valve.

[0007] Further, an exhaust fan is provided in the exhaust air passage between the total heat exchange core and the exhaust air outlet. A second regulating valve is provided in the inner cavity of the exhaust air outlet, and the exhaust air passage is switched on and off and the air flow rate is adjusted by the second regulating valve.

[0008] Further, a supply fan is provided in the supply air passage between the total heat exchange core and the supply air outlet.

[0009] Further, a return air filter screen is provided in the return air passage between the total heat exchange core and the return air inlet.

[0010] Further, the main body of all the regulating valves is provided as a sleeve formed by intercepting a steel pipe. A circular blade with a silica gel sealing ring is provided in any one of the sleeves, and the blade is integrally welded to a connecting rod horizontally passing through the sleeve; a micro motor is connected to the outer wall of any one of the sleeves, and the blade is driven by the micro motor and can be adjusted and positioned within the range of 0° to 90° through the transmission of the connecting rod.

[0011] Compared with the prior art, the beneficial effects of the total heat exchange device of the present utility model are as follows: Through the regulating valves installed at specific positions, the device can switch the on and off of each air duct and adjust the air flow rate according to application requirements, so as to freely switch different operating modes such as total heat exchange, internal circulation, mixed air, unidirectional flow supply air, and unidirectional flow exhaust air, expanding the application range and working environment of the device. Description of the Drawings

[0012] Figure 1 is a schematic internal structure diagram of the adjustable total heat exchange device of the present utility model.

[0013] Figure 2 is Figure 1 a schematic diagram of the structure and several on-off states of the regulating valve in the total heat exchange device shown.

[0014] Figure 3 is Figure 1 a schematic diagram of the air flow of the total heat exchange device shown in the total heat exchange state.

[0015] Figure 4 is Figure 1 a schematic diagram of the air flow of the total heat exchange device shown in the internal circulation purification state.

[0016] Figure 5 is Figure 1 a schematic diagram of the air flow of the total heat exchange device shown in the adjustable mixed air state.

[0017] Figure 6 is Figure 1 a schematic diagram of the air flow of the total heat exchange device shown in the unidirectional flow supply air state.

[0018] Figure 7 is Figure 1Schematic diagram of the air flow of the total heat exchange device in the unidirectional exhaust state as shown. Detailed implementation manners

[0019] The following will further elaborate on the specific implementation manners of the present invention in combination with the accompanying drawings of the embodiments, so that the technical solution of the present invention can be more easily understood and grasped, thereby making the protection scope of the present invention more clearly defined.

[0020] In view of many deficiencies in aspects such as the compressive resistance and durability of ventilation devices in existing extreme weather scenarios, the designer of the present invention innovatively proposed an adjustable total heat exchange device, which can adjust the air supply and exhaust states and ventilation air flow rates of the device according to different application scenarios, and can achieve multiple operating modes.

[0021] As Figure 1 As shown in the technical overview, a total heat exchange core (not marked) is provided in the middle compartment 11 of the outer shell box 1 of the total heat exchange device. One side of the middle compartment of the outer shell box 1 is provided with an air supply port 21 and a return air port 22 facing the indoor, and the other side of the middle compartment is provided with an exhaust port 23 and an air inlet 24 facing the outdoor. Correspondingly, an air supply channel 14 is formed between the inner side of the air supply port 21 and the total heat exchange core, a return air channel 15 is formed between the inner side of the return air port 22 and the total heat exchange core, an exhaust channel 13 is formed between the inner side of the exhaust port 23 and the total heat exchange core, and an air inlet channel 12 is formed between the air inlet 24 and the total heat exchange core. And each air duct is independently connected to the total heat exchange core. Specifically, the double-in and double-out connection mode of the total heat exchange core is a conventional assembly structure of existing similar devices, so the detailed description is omitted. Particularly, a number of regulating valves are distributed in the inner cavities of the air inlet 24 and the exhaust port 23 respectively, and on the partition between the air inlet channel 12 and the exhaust channel 13. Each regulating valve is independently controlled to open and close and guide the air flow direction in each air duct. On this improved basis, the air flow direction and on-off situation of each air port of the device can be freely adjusted according to the application requirements, laying a foundation for expanding the application scenarios and improving the ability to withstand harsh climates.

[0022] To facilitate the description of different operating modes of the device, the functional component configurations in each air duct are further refined and the naming of each regulating valve is defined. Specifically, an air supply filter screen 6 is provided in the air inlet channel 12, an exhaust fan 4 is provided in the exhaust channel 13, an air supply fan 5 is provided in the air supply channel 14, and a return air filter screen 7 is provided in the return air channel 15. And a first regulating valve 3a is provided in the inner cavity of the air inlet 24, and a second regulating valve 3b is provided in the inner cavity of the exhaust port 23. Then, the on-off and the flowing air flow rate of the air inlet channel and the exhaust channel to the outside can be controlled and switched through the corresponding regulating valves. Thus, the third regulating valve provided in the partition between the above-mentioned air inlet channel 12 and the exhaust channel 13 is used to switch the on-off and the flowing air flow rate of the two air ducts.

[0023] As Figure 2As shown in the figure, the main body of all regulating valves 3 is provided with a sleeve 31 formed by cutting a steel pipe. A circular blade 32 with a silicone rubber seal ring is provided in any one of the sleeves. The blade 32 is integrally welded to a connecting rod 33 horizontally inserted into the sleeve. A micro motor is connected to the outer wall of any one of the sleeves. The blade 32 is driven by the micro motor and can be adjusted and positioned within the range of 0° to 90° through the transmission of the connecting rod. Here, each micro motor is connected to an external controller through a signal bus buried in the wall or air duct, and is manually modulated or connected to a remote control signal through the external controller.

[0024] Understanding more specifically from the device operation mode: First, as Figure 3 shown in the total heat exchange mode, the first regulating valve 3a and the second regulating valve 3b are both opened to the fully open state of 90 degrees, while the third regulating valve 3c is adjusted to 0 degrees to be fully closed. In this way, outdoor fresh air enters the room through the air inlet 24, the first regulating valve 3a, the air supply filter 6, the total heat exchange core, and is sent into the room through the air supply fan 5 and the air supply outlet 21, as shown by the solid curve in the figure. Similarly, indoor return air passes through the return air outlet 22, the return air filter 7, the total heat exchange core, and then is discharged to the outside through the exhaust fan 4, the second regulating valve 3b, and the exhaust outlet 23.

[0025] In this mode, the supply air and the exhaust air perform energy exchange in the total heat exchange core, realizing the energy recovery of the exhaust air and achieving the purpose of energy conservation. At the same time, it can purify the outdoor fresh air and achieve the purpose of clean air supply in the room. Thus, it can effectively supplement the oxygen in the room and ensure the freshness of the indoor air.

[0026] Second, as Figure 4 shown in the internal circulation purification ventilation mode, the first regulating valve 3a and the second regulating valve 3b are both completely closed, while the third regulating valve 3c is completely opened. And, the exhaust fan 4 is closed and the air supply fan 4 is opened. In this way, the indoor air passes through the return air outlet, the return air filter, the total heat exchange core, the third regulating valve, and then is driven and drained by the air supply fan and sent back into the room from the air supply outlet. This mode is mainly applicable to extremely bad outdoor weather (such as sandstorms, severe haze, etc.). Through internal circulation purification, the indoor air can be quickly purified and the room temperature can be kept stable.

[0027] Third, as Figure 5 shown in the adjustable mixed air mode, the above three regulating valves can be respectively adjusted to 0° to 90° (taking 0°, 30°, 60°, 90° as examples, but not limited to this). For example, in some severely cold areas, the temperature is relatively low in winter. Directly adopting the total heat exchange mode may cause ice formation inside the total heat exchange core body, which may further damage the equipment. Therefore, for severely cold areas, the mixed air mode can be adopted for operation to avoid damage to the equipment caused by severe cold.

[0028] In the mixed air mode, the second regulating valve is opened to 90°, for normal exhaust. The third regulating valve is closed, and the first regulating valve is intermittently opened and closed to supplement fresh air. At the same time, the temperature at the indoor air supply of the total heat exchange core is monitored in real time by an internal thermometer. When the temperature is lower than 5°C, the first regulating valve is adjusted from 90° to 60° or 30° to reduce the cold air entering the room. At this time, the indoor air passes through the return air inlet, return air filter, total heat exchange core, and then through the exhaust fan and exhaust outlet to the outside. When the temperature monitored at the air supply outlet continues to drop and is still lower than 2°C when the first regulating valve is adjusted to 30°, the first regulating valve, the second regulating valve, and the exhaust fan are closed, and the third regulating valve is fully opened at the same time. The device is changed to the internal circulation intermittent fresh air supplement mode.

[0029] When it is detected that the indoor carbon dioxide data exceeds the set value (since it is a common off-the-shelf device, the detection process is omitted for detailed description), the third regulating valve is changed from 90° to 60°, and at the same time, the first regulating valve is opened to 90° to supplement outdoor fresh air. The temperature at the indoor air supply outlet is monitored in real time, and the opening angle of the first regulating valve is changed to adjust the amount of outdoor fresh air sent into the room, ensuring the normal operation of the device while meeting the indoor fresh air demand.

[0030] IV. In the unidirectional air supply mode as Figure 6 shown, in this state, the first regulating valve is fully opened, and the air supply fan is also opened; the second regulating valve, the third regulating valve, and the exhaust fan are closed. In this way, outdoor air passes through the air inlet, the first regulating valve, the air supply filter, the total heat exchange core, and then through the air supply fan and the air supply outlet into the room. At this time, there is no exhaust, and the indoor positive pressure state is maintained. Among them, the first regulating valve can be adjusted to 90°, 60°, or 30° as needed, and in combination with the air supply fan speed adjustment, the indoor positive pressure value is adjusted.

[0031] V. In the unidirectional air supply mode as Figure 7 shown, in this state, the second regulating valve is fully opened, and the exhaust fan is also opened; the first regulating valve, the third regulating valve, and the air supply fan are closed. In this way, the indoor air passes through the return air inlet, the return air filter, the total heat exchange core, and then through the exhaust fan and the exhaust outlet to the outside. At this time, there is no air supply, and the indoor negative pressure state is maintained. The second regulating valve can be adjusted to 90°, 60°, or 30° as needed, and in combination with the exhaust fan speed adjustment, the indoor negative pressure value is adjusted.

[0032] In summary, from the introduction of the solution and the detailed description of the embodiments of the ventilation device with heat exchange function of the present utility model, it can be seen that this solution has substantial features and progressiveness: through the regulating valves installed at specific positions, it can switch the on / off of each air duct and adjust the air flow according to the application requirements, so as to freely switch different operating modes such as total heat exchange, internal circulation, mixed air, unidirectional flow air supply, and unidirectional flow air exhaust, expanding the application range and working environment of the device. In addition, the regulating valve built into the air outlet occupies a small space and has a high degree of integration. The on / off and flow rate are mainly adjusted by analog signals, with stable performance and excellent controllability.

[0033] In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present invention.

Claims

1. An adjustable total heat exchange device, in which a total heat exchange core is provided in the middle compartment of the outer shell box body, and the outer shell box body is provided with an air supply port and a return air port facing the indoor on one side of the middle compartment, and an exhaust port and an air inlet facing the outdoor on the other side of the middle compartment. The air ducts inside each air port are independently connected to the total heat exchange core, and it is characterized in that: In the inner cavities of the air inlet and the air outlet respectively, and on the partition between the air inlet channel and the air outlet channel, a number of regulating valves are distributed, and each regulating valve is independently controlled to open and close and guide the air flow direction in each air duct.

2. The adjustable total heat exchange device according to claim 1, characterized in that: A supply air filter screen is provided in the air inlet channel between the total heat exchange core and the air inlet. It is defined that a first regulating valve is arranged in the inner cavity of the air inlet, and the air inlet channel is switched on and off and the air flow rate is adjusted by the first regulating valve.

3. The adjustable total heat exchange device according to claim 1, wherein: An exhaust air fan is provided in the exhaust air channel between the total heat exchange core and the air outlet. It is defined that a second regulating valve is arranged in the inner cavity of the air outlet, and the exhaust air channel is switched on and off and the air flow rate is adjusted by the second regulating valve.

4. The adjustable total heat exchange device according to claim 1, wherein: A supply air fan is provided in the supply air channel between the total heat exchange core and the supply air outlet.

5. The adjustable total heat exchange device according to claim 1, wherein: A return air filter screen is provided in the return air channel between the total heat exchange core and the return air inlet.

6. The adjustable total heat exchange device according to claim 1, characterized in that: The main body of all the regulating valves is a sleeve formed by cutting a steel pipe. A circular blade with a silica gel sealing ring is arranged in any sleeve, and the blade is integrally welded to a connecting rod horizontally passing through the sleeve; a micro motor is connected to the outer wall of any sleeve, and the blade is driven by the micro motor and can be adjusted and positioned within the range of 0° to 90° through the transmission of the connecting rod.

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