Air supply device and variable air volume air conditioning system

Abstract

The utility model belongs to the technical field of air conditioning systems, and discloses an air supply device and a variable air volume air conditioning system. The air supply device comprises a variable air volume box, an air supply pipeline and an air supply fan. The variable air volume box comprises a box body and an air door, an inlet and an outlet are formed in the box body, and the air door is arranged at the inlet; the air supply pipeline comprises a horizontal section and a vertical section, one end of the horizontal section communicates with the outlet, the horizontal section is arranged at the indoor top, a first air opening is formed in the horizontal section, the vertical section extends to the indoor bottom, and a second air opening is formed in the end, close to the indoor bottom, of the vertical section; the air supply fan is arranged at the second air opening. The air supply device supplies cold air into the indoor space from the upper portion and supplies hot air into the indoor space from the lower portion, the uniformity of the indoor temperature during cold supply and heat supply is improved, the heat supply efficiency can be improved, and the power consumption and noise of the draught fan are reduced. Meanwhile, in the heat supply period, negative pressure exists at the first air opening, part of indoor return air can be sucked in and participates in indoor air circulation, and the uniformity of indoor heat supply is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning systems, in particular to an air supply device and a variable air volume air conditioning system. Background Art

[0002] A variable air volume air conditioning system (Variable Air Volume, VAV) adjusts the air volume at the end through a variable air volume box (VAV box). An air outlet is provided on the VAV box, and an adjustable valve is provided at the air outlet. By controlling the opening degree of the adjustable valve, the air volume can be adjusted according to the cooling or heating demand.

[0003] Currently, the VAV box is generally arranged at the upper part of the room, and the room is cooled or heated through the air outlet of the VAV box. During cooling, due to the high specific gravity of air, the sinking effect of cold air can be utilized to meet the circulation demand of cold air in the room. However, during heating, since hot air has a low density, it will accumulate at the upper part of the room, resulting in a large temperature difference between the upper and lower parts of the room, seriously affecting the heat exchange efficiency and comfort in the room. In order to improve the heat exchange efficiency and the uniformity of the indoor temperature, a large-power blower needs to be used for air supply, resulting in large air supply power consumption and noise.

[0004] Therefore, there is an urgent need to propose an air supply device and a variable air volume air conditioning system to solve the above technical problems. Summary of the Utility Model

[0005] According to one aspect of the utility model, the utility model provides an air supply device that sends cold air into the indoor space from above and hot air into the indoor space from below, improving the uniformity of the indoor temperature during cooling and heating, and capable of improving the heating efficiency, reducing the fan power consumption and noise.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An air supply device for heating or cooling a room, the air supply device comprising:

[0008] A variable air volume box, including a box body and a damper, the box body is provided with an inlet and an outlet, and the damper is arranged at the inlet for adjusting the opening degree of the inlet;

[0009] An air supply pipeline, including a horizontal section and a vertical section, one end of the horizontal section is communicated with the outlet, the horizontal section is arranged at the top of the room, a first air outlet is provided on the horizontal section, the vertical section extends to the bottom of the room, and one end of the vertical section close to the bottom of the room has a second air outlet;

[0010] An air supply fan is arranged at the second air outlet.

[0011] Optionally, an auxiliary heating device is provided on the vertical section, and the auxiliary heating device is used to heat the air in the vertical section.

[0012] Optionally, the auxiliary heating device is arranged at the second air outlet.

[0013] Optionally, the heating power of the auxiliary heating device is adjustable.

[0014] Optionally, the air supply device further includes:

[0015] A first temperature sensor, arranged at the second air outlet, for obtaining the real-time air supply temperature at the second air outlet;

[0016] A second temperature sensor, arranged in the room, for obtaining the real-time room temperature in the room;

[0017] A control system, the first temperature sensor, the second temperature sensor, the air supply fan and the auxiliary heating device are all communicatively connected to the control system, and the control system is used to adjust the heating power of the auxiliary heating device according to the real-time air supply temperature, the real-time room temperature and the air supply power of the air supply fan.

[0018] Optionally, there are multiple first air outlets; and / or, there are multiple second air outlets.

[0019] Optionally, the air supply fan is an axial flow direct current brushless fan.

[0020] Optionally, the variable air volume box is a single-duct variable air volume box.

[0021] According to another aspect of the present invention, the present invention further provides a variable air volume air conditioning system, including an air conditioning unit and the air supply device according to any one of the above technical solutions, and the air outlet of the air conditioning unit is communicated with the inlet of the variable air volume box.

[0022] Optionally, there are multiple air supply devices, and the multiple air supply devices are arranged at intervals along the circumferential direction of the room.

[0023] Advantages of the present invention:

[0024] The present utility model provides an air supply device for heating or cooling an indoor space, which includes a variable air volume box, an air supply pipeline, and an air supply fan. The air supply pipeline includes a horizontal section and a vertical section. One end of the horizontal section is connected to the outlet of the variable air volume box, and the horizontal section is arranged at the top of the indoor space. A first air outlet is provided on the horizontal section. The vertical section extends to the bottom of the indoor space, and one end of the vertical section near the bottom of the indoor space has a second air outlet. When cooling the indoor space, the air supply fan can be not turned on, and cold air will enter the indoor space from the first air outlet and exchange heat with the indoor space. Since cold air can sink, the indoor temperature can be made uniform through the sinking effect. When heating the indoor space, the air supply fan is turned on. Under the suction effect of the air supply fan, hot air will enter the indoor space from the second air outlet. Since the second air outlet is arranged at the bottom of the indoor space, the hot air discharged from the second air outlet will be evenly distributed throughout the indoor space under the upward floating effect, improving the uniformity of the indoor temperature and having a relatively high heat exchange efficiency. Therefore, the power of the air supply fan does not need to be set very high, reducing the air supply energy consumption and noise. At the same time, during the heating period, the air supply volume of the variable air volume box is relatively small, and the air volume of the air supply fan is greater than the air supply volume of the variable air volume box. At this time, a negative pressure is generated at the first air outlet, which can suck in part of the indoor return air and participate in the indoor air circulation, further improving the uniformity of indoor heating.

[0025] The present utility model also provides a variable air volume air conditioning system, which includes an air conditioning unit and the above-mentioned air supply device. Since the above-mentioned air supply device is adopted in this variable air volume air conditioning system, the indoor temperature is relatively uniform during heating, and both the air supply power consumption and the noise are relatively low. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0027] Figure 1 It is a schematic diagram of the air supply device provided by the embodiment of the present utility model.

[0028] In the figure:

[0029] 100, variable air volume box; 110, box body; 111, inlet; 112, outlet; 120, air damper;

[0030] 200, air supply pipeline; 210, horizontal section; 211, first air outlet; 220, vertical section; 221, second air outlet;

[0031] 300, air supply fan;

[0032] 400, auxiliary heating device. Detailed implementation manners

[0033] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of description, only parts related to the present utility model rather than all structures are shown in the accompanying drawings.

[0034] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0036] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] This embodiment provides an air supply device that sends cold air into the indoor space from above and hot air into the indoor space from below, improving the uniformity of indoor temperature during cooling and heating, and capable of improving the heating efficiency, reducing the power consumption and noise of the fan.

[0038] This air supply device is used for heating or cooling the indoor space. Specifically, as Figure 1As shown in the figure, the air supply device includes a variable air volume box 100, an air supply pipeline 200, and an air supply fan 300. Among them, the variable air volume box 100 includes a box body 110 and a damper 120. An inlet 111 and an outlet 112 are provided on the box body 110. The damper 120 is arranged at the inlet 111 for adjusting the opening degree of the inlet 111. The air supply pipeline 200 includes a horizontal section 210 and a vertical section 220. One end of the horizontal section 210 is communicated with the outlet 112. The horizontal section 210 is arranged at the top of the room. A first air outlet 211 is provided on the horizontal section 210. The vertical section 220 extends to the bottom of the room. One end of the vertical section 220 close to the bottom of the room has a second air outlet 221. The air supply fan 300 is arranged at the second air outlet 221.

[0039] It should be noted that the variable air volume box 100 needs to be used in combination with the air handling unit of the variable air volume air conditioning system. After the air handling unit heats or cools, it will send the air into the variable air volume box 100.

[0040] The method of using this air supply device to heat the room is as follows:

[0041] The hot air from the air handling unit is received at the inlet 111 of the variable air volume box 100. The damper 120 is adjusted according to the air volume demand, so that the hot air enters the horizontal section 210 from the outlet 112 of the variable air volume box 100. At the same time, the air supply fan 300 is turned on. Under the suction of the air supply fan 300, the hot air will directly enter the vertical section 220 from the horizontal section 210 and be discharged into the room from the second air outlet 221. Since the second air outlet 221 is located at the bottom of the room, this makes the hot air evenly distributed throughout the room under the buoyancy effect, improving the uniformity of the indoor temperature and having a relatively high heat exchange efficiency. At the same time, during the heating period, since the air supply volume of the variable air volume box 100 is small and the air volume of the air supply fan 300 is greater than the air supply volume of the variable air volume box 100, at this time, a negative pressure is generated at the first air outlet 211, which can suck in part of the indoor return air and participate in the indoor air circulation, further improving the uniformity of indoor heating. Therefore, the power of the air supply fan 300 does not need to be set very large, reducing the air supply energy consumption and noise.

[0042] The method of using this air supply device to cool the room is as follows:

[0043] The cold air from the air handling unit is received at the inlet 111 of the variable air volume box 100. The damper 120 is adjusted according to the air volume demand, so that the cold air enters the horizontal section 210 from the outlet 112 of the variable air volume box 100. Since the cold air is heavier, the cold air will enter the room from the first air outlet 211 and exchange heat with the indoor space. Since the cold air can sink, the indoor temperature can be made uniform through the sinking effect, and the air supply fan 300 can be not turned on during the cooling process, with lower cooling energy consumption.

[0044] It should be noted that if the first air outlet 211 is arranged near the window indoors, in order to avoid frosting on the window due to a large temperature difference between the inside and outside, the air supply fan 300 can be turned on to make the hot air below the indoor rise. During the rising process, the hot air will pass by the window and finally enter the horizontal section 210 through the first air outlet 211, and then be blown out by the second air outlet 221 to form a circulating air flow, so that the temperature at the window is maintained within the range of not frosting, improving the user's satisfaction.

[0045] Furthermore, in a possible embodiment, multiple first air outlets 211 can be arranged. By arranging multiple first air outlets 211, it is possible to blow air in different directions simultaneously, which is beneficial to improving the efficiency of uniform indoor temperature. In another possible embodiment, multiple second air outlets 221 can also be arranged.

[0046] In this embodiment, both the first air outlet 211 and the second air outlet 221 are provided with multiple ones.

[0047] Optionally, the air supply fan 300 can be an axial flow DC brushless fan.

[0048] Optionally, the variable air volume box 100 can adopt a single-duct variable air volume box. The single-duct variable air volume box has a simple structure, which is beneficial to saving costs and installation expenses.

[0049] Furthermore, continue to refer to Figure 1 , an auxiliary heating device 400 is provided on the vertical section 220. The auxiliary heating device 400 is used to heat the air in the vertical section 220. By arranging the auxiliary heating device 400, when the primary air heating is insufficient, the hot air can be heated to meet the user's heating requirements.

[0050] Optionally, the auxiliary heating device 400 is arranged at the second air outlet 221. By arranging the auxiliary heating device 400 at the second air outlet 221, the auxiliary heating device 400 is located at a low position indoors, which is convenient for installation and maintenance.

[0051] Furthermore, the heating power of the auxiliary heating device 400 is adjustable. For example, corresponding heating modes can be set according to different powers of the auxiliary heating device 400. The heating modes can be divided into: anti-freezing mode, energy-saving mode, comfort mode, etc. The user can select according to needs, which is beneficial to improving the user's satisfaction.

[0052] Further, the air supply device further includes a first temperature sensor, a second temperature sensor, and a control system. Among them, the first temperature sensor is disposed at the second air outlet 221 for obtaining the real-time air supply temperature at the second air outlet 221. The second temperature sensor is disposed indoors for obtaining the real-time indoor temperature. The first temperature sensor, the second temperature sensor, the air supply fan 300, and the auxiliary heating device 400 are all communicatively connected to the control system, and the control system is configured to adjust the heating power of the auxiliary heating device 400 according to the real-time air supply temperature, the real-time indoor temperature, and the air supply power of the air supply fan 300. Through the synergistic effect among the first temperature sensor, the second temperature sensor, the air supply fan 300, the auxiliary heating device 400, and the control system, the control of the indoor temperature can be achieved, and the comfort of the indoor temperature is improved.

[0053] This embodiment further provides a variable air volume air conditioning system, including an air conditioning unit and the above-mentioned air supply device. The air outlet of the air conditioning unit is communicated with the inlet 111 of the variable air volume box 100.

[0054] Since the variable air volume air conditioning system adopts the above-mentioned air supply device, the indoor temperature is relatively uniform during heating, and both the air supply power consumption and the noise are relatively low.

[0055] Further, a plurality of air supply devices are provided, and the plurality of air supply devices are arranged at intervals along the circumferential direction of the room. By providing a plurality of air supply devices, air supply can be simultaneously performed at different positions in the room, so that the indoor temperature can rise or fall rapidly, and the heating and cooling efficiency of the variable air volume air conditioning system is improved.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A air supply device for heating or cooling a room, characterized in that, The air supply device includes: A variable air volume box (100), including a box body (110) and a damper (120). The box body (110) is provided with an inlet (111) and an outlet (112). The damper (120) is arranged at the inlet (111) for adjusting the opening degree of the inlet (111). An air supply pipeline (200), including a horizontal section (210) and a vertical section (220). One end of the horizontal section (210) is communicated with the outlet (112). The horizontal section (210) is arranged at the top of the room. The horizontal section (210) is provided with a first air outlet (211). The vertical section (220) extends to the bottom of the room. One end of the vertical section (220) near the bottom of the room has a second air outlet (221). An air supply fan (300) is arranged at the second air outlet (221).

2. The air supply device according to claim 1, characterized in that, An auxiliary heating device (400) is provided on the vertical section (220). The auxiliary heating device (400) is used for heating the air in the vertical section (220).

3. The air supply device according to claim 2, characterized in that, The auxiliary heating device (400) is arranged at the second air outlet (221).

4. The air supply device according to claim 2, wherein The heating power of the auxiliary heating device (400) is adjustable.

5. The air supply device according to claim 4, characterized in that The air supply device further includes: A first temperature sensor is arranged at the second air outlet (221) for obtaining the real-time air supply temperature at the second air outlet (221). A second temperature sensor is arranged in the room for obtaining the real-time room temperature in the room. A control system. The first temperature sensor, the second temperature sensor, the air supply fan (300) and the auxiliary heating device (400) are all communicatively connected to the control system. The control system is used for adjusting the heating power of the auxiliary heating device (400) according to the real-time air supply temperature, the real-time room temperature and the air supply power of the air supply fan (300).

6. The air supply device according to claim 1, wherein There are multiple first air outlets (211); and / or there are multiple second air outlets (221).

7. The air supply device according to claim 1, wherein, The air supply fan (300) is an axial flow direct current brushless fan.

8. The air supply device according to claim 1, characterized in that, The variable air volume box (100) is a single duct variable air volume box.

9. Variable air volume air conditioning system, characterized in that, It includes an air conditioning unit and the air supply device according to any one of claims 1-8. The air outlet of the air conditioning unit is communicated with the inlet (111) of the variable air volume box (100).

10. The variable air volume air conditioning system according to claim 9, wherein, There are multiple air supply devices, and the multiple air supply devices are arranged at intervals along the circumference of the room.

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