Induced fan coil suspended ceiling air conditioner

Abstract

The utility model relates to an induction type fan coil suspended ceiling air conditioner, belongs to the technical field of air conditioning, and solves the problem that a suspended ceiling induction unit in the prior art can only operate at a fixed primary air volume. Or when the primary air is closed, the ceiling induction unit cannot supply cold or heat. The device comprises a box body, an air duct unit, a heat exchange coil, a fan, a primary air nozzle and an air return nozzle, the air duct unit is arranged at the top of the box body and communicated with an inner cavity of the box body, the inner cavity of the box body is divided into a fan cavity and an induction cavity, the fan is located in the fan cavity and connected with the air duct unit, and the primary air nozzle is connected with the induction cavity. The primary air nozzle and the air return nozzle are both located in the induction cavity and connected with the air duct unit, and the heat exchange coil is arranged at the bottom of an inner cavity of the box body. Air induced by the primary air nozzle or the return air nozzle can be cooled or heated through the heat exchange coil pipe, and the cooling or heating effect can be guaranteed under the condition that the primary air volume is changed or the primary air is closed.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an induction type fan coil ceiling air conditioner. Background Art

[0002] The ceiling inducer (active chilled beam) is an air-conditioning terminal device installed on the ceiling of the room. It is a special air supply device, consisting of a box, a nozzle, a static pressure box, a primary air interface and a heat exchange coil. The primary air (fresh air) centrally processed by the air handling unit is first sent into the static pressure box of the ceiling inducer by the air supply fan of the air handling unit, and then ejected from the nozzle at a high speed (20-30m / s). Under the action of the jet airflow, a negative pressure is formed in the inducer, so that the indoor air can be induced in to generate induced wind. After the induced wind is heated or cooled by the heat exchange coil, it is mixed with the primary air to form the supply air of the air-conditioned room. Part of the air-conditioning cooling load or air-conditioning heating load is borne by the primary air obtained by the central processing of the air handling unit, and the other part of the air-conditioning cooling load or air-conditioning heating load is borne by the induced wind heated or cooled by the heat exchange coil.

[0003] However, the existing ceiling inductor has the following disadvantages: it can only operate at a fixed primary air volume. When the primary air volume decreases, the cooling or heating effect of the ceiling inductor is poor; when the primary air is turned off, the ceiling inductor cannot provide cooling or heating. Utility Model Content

[0004] In view of the above analysis, the embodiment of the present invention aims to provide an induction type fan coil ceiling air conditioner to solve one of the following problems of existing ceiling induction units: 1) it can only operate at a fixed primary air volume. When the primary air volume is reduced or the primary air is not cooled or heated, the cooling or heating effect of the ceiling induction unit is poor; 2) when the primary air is turned off, the ceiling induction unit cannot provide cooling or heating.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] An induction-type fan coil ceiling air conditioner comprises a box body, an air duct unit, a heat exchange coil, a fan, a primary air nozzle and a return air nozzle. The air duct unit is arranged at the top of the box body and is connected to the inner cavity of the box body. The inner cavity of the box body is divided into a fan cavity and an induction cavity. The fan is located in the fan cavity and is connected to the air duct unit. The primary air nozzle and the return air nozzle are both located in the induction cavity, and the primary air nozzle and the return air nozzle are both connected to the air duct unit. The heat exchange coil is arranged at the bottom of the inner cavity of the box body.

[0007] Furthermore, the air duct unit includes a primary air static pressure box, a first connecting static pressure box and a second connecting static pressure box, the first connecting static pressure box and the second connecting static pressure box are both arranged below the primary air static pressure box and are both connected to the primary air static pressure box, and the first connecting static pressure box and the second connecting static pressure box are both provided with the primary air nozzle and the return air nozzle.

[0008] Furthermore, the air duct unit further includes a return air static pressure box, and the first connecting static pressure box and the second connecting static pressure box are respectively located on both sides of the return air static pressure box and are both connected to the return air static pressure box.

[0009] Furthermore, the first connecting static pressure box is divided into a plurality of first connecting cavities and a plurality of second connecting cavities that are staggered. The primary air nozzle arranged on the first connecting static pressure box is connected to the first connecting cavity, and the return air nozzle arranged on the first connecting static pressure box is connected to the second connecting cavity.

[0010] Furthermore, the second connecting static pressure box is divided into a plurality of third connecting chambers and a plurality of fourth connecting chambers that are staggered. The primary air nozzle arranged on the second connecting static pressure box is connected to the third connecting chamber, and the return air nozzle arranged on the second connecting static pressure box is connected to the fourth connecting chamber.

[0011] Furthermore, a plurality of first openings and a plurality of second openings are respectively provided on both sides of the bottom along the length direction of the primary air static pressure box, the first opening is communicated with the first communicating cavity, and the second opening is communicated with the third communicating cavity.

[0012] Furthermore, a plurality of third openings and a plurality of fourth openings are provided on both sides along the length direction of the return air static pressure box, the third openings are communicated with the second communicating cavity, and the fourth openings are communicated with the fourth communicating cavity.

[0013] Furthermore, the box body includes a first partition plate, which separates the inner cavity of the box body into the fan cavity and the induction cavity.

[0014] Furthermore, the box body also includes a second partition and a third partition arranged in the induction chamber, the second partition and the third partition are arranged in an eight-shape, and the heat exchange coil is arranged at the upper opening formed by the second partition and the third partition.

[0015] Furthermore, a first air return port, a second air return port, a first air supply port and a second air supply port are provided at the bottom of the box.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] (1) The air duct unit of the present invention is arranged on the top of the box body, and a heat exchange coil, a fan, a primary air nozzle and a return air nozzle are arranged in the box body. The primary air nozzle and the return air nozzle are both connected to the air duct unit. The primary air and return air entering the air duct unit can flow out through the primary air nozzle and the return air nozzle respectively, and the air entering the box body can be cooled or heated by the heat exchange coil, so that the air flowing out of the box body can be cooled or heated.

[0018] (2) The utility model divides the inner cavity of the box into a fan cavity and an induction cavity, the first return air inlet is connected to the fan cavity, the second return air inlet is connected to the induction cavity, the air in the fan cavity flows into the induction cavity through the return air nozzle, a fan is provided in the fan cavity, a heat exchange coil or a second heat exchange zone of the heat exchange coil is provided in the induction cavity, the first heat exchange zone of the heat exchange coil can be provided in the fan cavity, when the primary air volume is reduced or the primary air is not heated and the primary air is turned off, the fan can introduce the indoor air into the fan cavity and flow out from the induction cavity, the air introduced by the fan makes up for the shortage of the primary air volume, the air induced by the primary air nozzle or the return air nozzle can be cooled or heated through the heat exchange coil, and the cooling or heating effect can be guaranteed when the primary air volume is changed or the primary air is turned off.

[0019] (3) The present invention integrates some functions of ordinary fan coil units into ceiling inducers, and develops a new type of ceiling air conditioner. The supply air of ordinary fan coil units is indoor return air that is pressurized by a fan and cooled or heated by a heat exchange coil. The supply air of ceiling inducers (active chilled beams) is a mixed air of primary air and induced air that is heated or cooled by a heat exchange coil. The present invention is provided with two groups of nozzles, primary air nozzles and return air nozzles. The air inlet of the primary air nozzles is primary air, and the air inlet of the return air nozzles is pressurized by a fan and cooled or heated by a heat exchange coil. The hot return air, the primary air ejected at high speed from the primary air nozzle and the return air ejected at high speed from the return air nozzle can generate induced wind separately or simultaneously, so that the air supply of the new ceiling air conditioner includes a mixture of primary air and induced wind, a mixture of return air and induced wind, and a variety of combinations of primary air, return air and induced wind. It can realize various working modes such as variable primary air volume for cooling or heating, cooling or heating without primary air, and fresh air. At the same time, it can meet the cooling or heating effect when the primary air volume changes, the primary air is not cooled or heated, or there is no primary air.

[0020] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of the present invention will be described in the following content, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the text and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. Throughout the accompanying drawings, the same reference symbols denote the same components.

[0022] Figure 1 Schematic diagram of the structure of the induction type fan coil ceiling air conditioner of specific embodiment 1;

[0023] Figure 2 Schematic diagram of the three-dimensional structure of the induction type fan coil ceiling air conditioner of specific embodiment 1;

[0024] Figure 3 It is a front view schematic diagram of the induction type fan coil ceiling air conditioner of specific embodiment 1;

[0025] Figure 4 Schematic cross-sectional view of the induction-type fan coil ceiling air conditioner of specific embodiment 1 in front view;

[0026] Figure 5 It is a schematic transverse cross-sectional view of the induction type fan coil ceiling air conditioner of specific embodiment 1.

[0027] Figure 6 Schematic diagram of the structure of the double-zone coil in specific embodiment 1;

[0028] Figure 7 It is a cross-sectional schematic diagram of the induction type fan coil ceiling air conditioner of specific embodiment 3 in the front view state.

[0029] Reference numerals:

[0030] 100 - cabinet; 101 - first side panel; 102 - second side panel; 103 - third side panel; 104 - fourth side panel; 105 - bottom panel; 1051 - first return air inlet; 1052 - second return air inlet; 1053 - first supply air inlet; 1054 - second supply air inlet; 106 - first partition; 107 - second partition; 108 - third partition; 109 - top panel;

[0031] 200 - air duct unit; 201 - primary air static pressure box; 2011 - primary air inlet; 202 - return air static pressure box; 203 - first connecting static pressure box; 204 - second connecting static pressure box;

[0032] 300 - heat exchange coil; 301 - water inlet; 302 - water outlet; 303 - fin; 304 - heat exchange tube; 305 - U-shaped tube; 306 - U-shaped coil; 307 - first guard plate; 308 - second guard plate; 309 - third guard plate;

[0033] 400-fan; 500-primary air nozzle; 600-return air nozzle. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, and are not used to limit the scope of the present invention.

[0035] Example 1

[0036] A specific embodiment of the present invention is as follows Figures 1-6 As shown, an induction-type fan coil ceiling air conditioner is disclosed, including a box body 100, an air duct unit 200, a heat exchange coil 300, a fan 400, a primary air nozzle 500 and a return air nozzle 600. The air duct unit 200 is arranged on the top of the box body 100 and is connected to the inner cavity of the box body 100. The inner cavity of the box body 100 is divided into a fan cavity and an induction cavity. The fan 400 is arranged in the fan cavity. The primary air nozzle 500 and the return air nozzle 600 are both arranged on the air duct unit 200 and located in the induction cavity. A part of the heat exchange area of ​​the heat exchange coil 300 is located in the fan cavity, and the other part of the heat exchange area is located in the induction cavity.

[0037] During implementation, indoor air can be introduced into the fan cavity through the fan 400 to generate return air. After the return air is cooled or heated by the heat exchange zone of the heat exchange coil 300 arranged in the fan cavity, it is ejected at high speed by the return air nozzle 600 arranged in the induction cavity, inducing the indoor air to enter the induction cavity to generate return air induction wind. The return air induction wind is cooled or heated by the heat exchange zone of the heat exchange coil 300 in the induction cavity; the indoor air can also be induced into the induction cavity by the primary air to generate primary air induction wind, and the primary air induction wind can also be cooled or heated by the heat exchange zone of the heat exchange coil 300 in the induction cavity.

[0038] In order to protect the internal structure and components of the box 100, Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the box body 100 includes a first side panel 101, a second side panel 102, a third side panel 103, a fourth side panel 104, a bottom panel 105 and a top panel 109. The first side panel 101 and the second side panel 102 have the same structure, both of which are L-shaped structures. The top panel 109 and the bottom panel 105 are parallel. The first side panel 101 and the second side panel 102 are arranged opposite each other. The top of one end of the first side panel 101 is connected to one side of the bottom of the air duct unit 200, and the top of the other end of the first side panel 101 is connected to one side of the top panel 109. The top of one end of the second side panel 102 is connected to the other side of the bottom of the air duct unit 200, and the top of the other end of the second side panel 102 is connected to the other side of the top panel 109. The upper end of the third side panel 103 is connected to the top panel 109. The third side panel 103 and the fourth side panel 104 are arranged opposite each other and parallel to each other. The first side panel 101 and the third side panel 103 are vertically connected, and the second side panel 102 and the fourth side panel 104 are vertically connected. The lower portions of the first side panel 101 and the second side panel 102 are arranged in an "eight" shape, which facilitates the output of air from the bottom of the box body 100. The bottom panel 105 is arranged at the bottom of the first side panel 101, the second side panel 102, the third side panel 103, and the fourth side panel 104. The top panel 109 is disposed on the upper end of the third side panel 103. One end of the top panel 109 is connected to the upper end of the third side panel 103, and the other end is connected to the upper end of one side of the air duct unit 200. The inner cavity of the housing 100 is enclosed by the first side panel 101, the second side panel 102, the third side panel 103, the fourth side panel 104, the bottom panel 105, the top panel 109, and the bottom surface of the air duct unit 200.

[0039] In order to make the indoor air flow into the box body 100, Figure 4 and Figure 5 As shown, a first return air inlet 1051, a second return air inlet 1052, a first supply air inlet 1053 and a second supply air inlet 1054 are provided on the base plate 105. The first return air inlet 1051 is located at one end of the base plate 105. For example, the first return air inlet 1051 is arranged close to the third side panel 103, the second return air inlet 1052 is located on one side of the first return air inlet 1051, and the first supply air inlet 1053 and the second supply air inlet 1054 are respectively located on both sides of the second return air inlet 1052.

[0040] In order to facilitate the control of the flow direction of the indoor air flowing in from the first return air outlet 1051 and the second return air outlet 1052, as shown in FIG. Figure 4As shown, a first partition 106 is further provided in the box body 100, which divides the inner cavity of the box body 100 into a fan cavity and an induction cavity. The fan cavity is enclosed by the third side panel 103, the top panel 109, a portion of the first side panel 101, a portion of the second side panel 102, a portion of the bottom panel 105, and the first partition 106; the induction cavity is enclosed by the fourth side panel 104, another portion of the first side panel 101, another portion of the second side panel 102, another portion of the bottom panel 105, the first partition 106, and the bottom surface of the air duct unit 200. Specifically, the first partition 106 is parallel to the third side panel 103, the upper end of the first partition 106 is connected to the lower end of the air duct unit 200, the lower end of the first partition 106 is connected to the bottom panel 105, and the two sides of the first partition 106 are respectively connected to the first side panel 101 and the second side panel 102. The first return air inlet 1051 and the second return air inlet 1052 are respectively located on both sides of the first partition 106, so that the first return air inlet 1051 is located at the lower end of the fan cavity and is connected to the fan cavity, and the indoor air enters the fan cavity through the first return air inlet 1051 to generate return air; the second return air inlet 1052 is located at the lower end of the induction cavity and is connected to the induction cavity, and the indoor air enters the induction cavity through the second return air inlet 1052 to generate return air induced wind and primary air induced wind.

[0041] Combine Figure 1 、 Figure 4 、 Figure 5 、 Figure 6 As shown, the heat exchange coil 300 is horizontally arranged at the lower part of the inner cavity of the box body 100 through the opening on the first partition 106. The heat exchange coil 300 adopts a double-partitioned coil, and the first heat exchange zone and the second heat exchange zone of the double-partitioned coil are respectively located in the fan cavity and the induction cavity. The dual-zone coil includes a U-shaped coil 306, a first guard plate 307, a second guard plate 308, a third guard plate 309 and fins 303. The U-shaped coil 306 is formed by multiple heat exchange tubes 304 and U-shaped tubes 305 connected end to end in an interlaced manner. The first guard plate 307 is arranged at the front end of the U-shaped coil 306, the second guard plate 308 is arranged in the middle of the U-shaped coil 306, and the third guard plate 309 is arranged at the rear end of the U-shaped coil 306; the heat exchange tubes 304 between the first guard plate 307 and the second guard plate 308 pass through multiple fins 303 arranged in parallel at approximately equal distances to form a first heat exchange zone, and the heat exchange tubes 304 between the second guard plate 308 and the third guard plate 309 pass through multiple fins 303 arranged in parallel at approximately equal distances to form a second heat exchange zone. The return air entering the fan cavity is cooled or heated after undergoing heat exchange with the air-conditioning cold water or air-conditioning hot water flowing through the heat exchange tube 304 through the heat exchange tube 304 and the fin 303 when passing through the first heat exchange zone; the primary air induced air and return air induced air entering the induction cavity are cooled or heated after undergoing heat exchange with the air-conditioning cold water or air-conditioning hot water flowing through the heat exchange tube 304 through the heat exchange tube 304 and the fin 303 when passing through the second heat exchange zone.

[0042] Preferably, the dual-zone coil also utilizes a copper tube and aluminum fin structure. The U-shaped coil 306 can be a single coil, two rows of tubes, or three rows of tubes. The length ratio of the first heat exchange zone to the second heat exchange zone is between 1:2 and 1:5. It should be noted that when cooling, the heat exchange coil 300 uses medium-temperature cold water and operates under dry conditions. As will be appreciated, the heat exchange coil 300 is provided with a water inlet 301 and a water outlet 302.

[0043] Combine Figure 1 and Figure 5 As shown, a first air supply port 1053 and a second air supply port 1054 are respectively provided on both sides of the second return air port 1052. Since the second return air port 1052, the first air supply port 1053 and the second air supply port 1054 are all connected to the induction cavity, in order to avoid the return air induction wind and the primary air induction wind entering from the second return air port 1052 not flowing through the heat exchange area of ​​the heat exchange coil 300, they flow out directly from the first air supply port 1053 and the second air supply port 1054, as shown in FIG. Figure 1 and Figure 5 As shown, a second partition 107 and a third partition 108 are provided within the housing 100. The bottoms of the second and third partitions 107, 108 are connected to the bottom plate 105 and arranged in an "eight" shape. The heat exchange zone of the heat exchange coil 300 located in the induction chamber is located at the upper opening formed by the second and third partitions 107, 108. Air entering the bottom of the induction chamber through the second return air port 1052 first passes through the heat exchange zone of the heat exchange coil 300 before entering the middle of the induction chamber and then flows out through the first and second air supply ports 1053, 1054 at the lower sides of the induction chamber.

[0044] Combine Figure 1 and Figure 5 As shown, the air duct unit 200 includes a primary air plenum box 201 and a return air plenum box 202. The primary air plenum box 201 is located on top of the return air plenum box 202. Preferably, both the primary air plenum box 201 and the return air plenum box 202 are rectangular parallelepiped structures. To allow for the inflow of primary air, the primary air plenum box 201 is provided with a primary air inlet 2011.

[0045] In this embodiment, the first side panel 101 and the second side panel 102 are both arranged along the length direction of the primary air static pressure box 201 and the return air static pressure box 202, and the third side panel 103 and the fourth side panel 104 are arranged along the width direction of the primary air static pressure box 201 and the return air static pressure box 202.

[0046] Combine Figure 1 and Figure 5As shown, the air duct unit 200 further includes a first connecting plenum box 203 and a second connecting plenum box 204. The first connecting plenum box 203 and the second connecting plenum box 204 are both located below the primary air plenum box 201 and on either side of the return air plenum box 202. In this embodiment, the primary air plenum box 201 serves as the upper structure of the air duct unit 200, and the return air plenum box 202 serves as the middle and lower structure of the air duct unit 200.

[0047] To ensure orderly flow of primary air, both the first connecting plenum box 203 and the second connecting plenum box 204 are connected to the primary air plenum box 201. Specifically, the bottom of the primary air plenum box 201 is provided with multiple first openings and multiple second openings. The first openings are located on one side of the bottom of the primary air plenum box 201 and are evenly distributed along the length of the primary air plenum box 201. The second openings are located on the other side of the primary air plenum box 201 and are evenly distributed along the length of the primary air plenum box 201. The first openings are connected to the first connecting plenum box 203, and the second openings are connected to the second connecting plenum box 204. In other words, the first openings are openings on the partition between the primary air plenum box 201 and the first connecting plenum box 203, and the second openings are openings on the partition between the primary air plenum box 201 and the second connecting plenum box 204.

[0048] Similarly, to achieve orderly return air flow, the first connecting plenum 203 and the second connecting plenum 204 are both connected to the return air plenum 202. Specifically, multiple third openings and multiple fourth openings are provided on both sides of the return air plenum 202. The third openings are located on the sidewall where the return air plenum 202 contacts the first connecting plenum 203 and are evenly distributed along the length of the return air plenum 202. The fourth openings are located on the sidewall where the return air plenum 202 contacts the second connecting plenum 204 and are evenly distributed along the length of the return air plenum 202. In other words, the third openings are provided on the partition between the return air plenum 202 and the first connecting plenum 203, and the fourth openings are provided on the partition between the return air plenum 202 and the second connecting plenum 204.

[0049] Recombination Figure 1 、 Figure 4 and Figure 5 As shown, fan 400 is disposed in the fan cavity. The outlet of fan 400 communicates with return air plenum 202 through an opening at one end of return air plenum 202, facilitating pressurized air delivery to return air plenum 202. Fan 400 is a centrifugal fan, and its motor is a brushless DC motor or a variable frequency motor. Fan 400 can be powered by 48V DC.

[0050] Combine Figure 1 、 Figure 4 and Figure 5As shown, the first connecting static pressure box 203 and the second connecting static pressure box 204 are both provided with a primary air nozzle 500 and a return air nozzle 600. Specifically, the primary air nozzle 500 and the return air nozzle 600 are staggered along the length direction of the first connecting static pressure box 203, and the primary air nozzle 500 and the return air nozzle 600 are staggered along the length direction of the second connecting static pressure box 204.

[0051] To separately control the orderly flow of primary air and return air, the first connecting plenum box 203 is divided into multiple first connecting cavities and multiple second connecting cavities. The first connecting cavities and the second connecting cavities are arranged alternately. The first connecting cavities communicate with the primary air plenum box 201 through a first opening, and the primary air nozzle 500 communicates with the first connecting cavities. For example, the primary air nozzle 500 is mounted on the side wall of the first connecting plenum box 203 corresponding to the first connecting cavity, and the air in the first connecting cavity is ejected through the primary air nozzle 500. The second connecting cavity communicates with the return air plenum box 202 through a third opening, and the return air nozzle 600 communicates with the second connecting cavity. For example, the return air nozzle 600 is mounted on the side wall of the first connecting plenum box 203 corresponding to the second connecting cavity, and the air in the second connecting cavity is ejected through the return air nozzle 600.

[0052] Similarly, the second connecting plenum box 204 is divided into a plurality of third connecting chambers and a plurality of fourth connecting chambers. The third connecting chambers are arranged alternately with the fourth connecting chambers. The third connecting chamber is connected to the primary air plenum box 201 through the second opening. The primary air nozzle 500 is connected to the third connecting chamber. Exemplarily, the primary air nozzle 500 is mounted on the side wall of the second connecting plenum box 204 corresponding to the third connecting chamber. The air in the third connecting chamber is ejected through the primary air nozzle 500. The fourth connecting chamber is connected to the return air plenum box 202 through the fourth opening. The return air nozzle 600 is connected to the fourth connecting chamber. Exemplarily, the return air nozzle 600 is mounted on the side wall of the second connecting plenum box 204 corresponding to the fourth connecting chamber. The air in the fourth connecting chamber is ejected through the return air nozzle 600.

[0053] In this embodiment, connecting cavities are alternately provided in the first connecting static pressure box 203 and the second connecting static pressure box 204, so that the primary air and return air are respectively ejected from the corresponding primary air nozzle 500 and return air nozzle 600 through different connecting cavities, which is beneficial to the control of air flow.

[0054] Through the above settings, this embodiment has multiple working modes such as fixed primary air cooling or heating working mode, variable primary air cooling or heating working mode, no primary air cooling or heating working mode and fresh air working mode.

[0055] Specifically, in the fixed primary air cooling or heating working mode, the low-temperature or high-temperature primary air enters the primary air static pressure box 201 through the primary air inlet 2011, and the primary air in the primary air static pressure box 201 enters the first connecting cavity of the first connecting static pressure box 203 and the third connecting cavity of the second connecting static pressure box 204 through the first opening and the second opening at the bottom of the primary air static pressure box 201, and then flows into the primary air nozzle 500 connected to the first connecting cavity and the third connecting cavity, and then passes through the primary air nozzle 500. The nozzle 500 sprays out air at a high speed, and the drainage effect of the high-speed spraying of the primary air reduces the pressure of the induction chamber, thereby inducing the indoor air to flow into the lower part of the induction chamber from the second return air port 1052 on the bottom plate 105, generating a primary air induced wind. The primary air induced wind is cooled or heated by the second heat exchange zone of the heat exchange coil 300, enters the upper part of the induction chamber, and after being mixed with the primary air in the upper part of the induction chamber, is sent out through the first air supply port 1053 and the second air supply port 1054 on the bottom plate 105 to cool down or heat up the room.

[0056] In the variable primary air cooling or heating working mode, low-temperature or high-temperature primary air enters the primary air static pressure box 201 from the primary air inlet 2011, and the primary air in the primary air static pressure box 201 enters the first connecting cavity of the first connecting static pressure box 203 and the third connecting cavity of the second connecting static pressure box 204 through the first opening and the second opening at the bottom of the primary air static pressure box 201 respectively, and then enters the primary air nozzle 500 connected to the first connecting cavity and the third connecting cavity respectively, and then is ejected at high speed through the primary air nozzle 500. The high-speed ejected primary air has a drainage effect that reduces the pressure of the induction cavity, thereby inducing the indoor air to flow into the lower part of the induction cavity from the second return air port 1052 on the bottom plate 105, generating primary air induction wind. The primary air induction wind is cooled or heated by the second heat exchange zone of the heat exchange coil 300 and enters the upper part of the induction cavity. At the same time, the fan 400 is running, and the indoor air flows into the lower part of the fan cavity from the first return air port 1051 on the bottom plate 105. The return air is cooled or heated in the first heat exchange zone of the heat exchange coil 300, and then pressurized by the fan 400 and sent to the return air static pressure box 202. The return air enters the second connecting cavity of the first connecting static pressure box 203 and the fourth connecting cavity of the second connecting static pressure box 204 through the third opening and the fourth opening on the two side walls of the return air static pressure box 202, respectively, and then enters the return air nozzle 600 connected to the second connecting cavity and the fourth connecting cavity, and then is ejected at high speed through the return air nozzle 600. The drainage effect of the ejected return air reduces the pressure of the induction chamber, thereby inducing another part of the indoor air to flow into the lower part of the induction chamber from the second return air port 1052 of the bottom plate 105, generating return air induction wind. The return air induction wind is cooled or heated by the second heat exchange zone of the heat exchange coil 300, and then mixed with the primary air, return air, and primary air induction wind at the upper part of the induction chamber, and then sent out through the first air supply port 1053 and the second air supply port 1054 on the bottom plate 105 to cool down or heat up the room.

[0057] In the non-primary air cooling or heating working mode, the fan 400 is running, and the indoor air flows into the lower part of the fan chamber from the first return air inlet 1051 on the bottom plate 105 to generate return air. The return air is cooled or heated by the first heat exchange zone of the heat exchange coil 300, and then pressurized by the fan 400 and sent to the return air static pressure box 202. The return air enters the second connecting cavity of the first connecting static pressure box 203 and the fourth connecting cavity of the second connecting static pressure box 204 through the third opening and the fourth opening on both side walls of the return air static pressure box 202, respectively. Then, the return air enters the second connecting cavity and the fourth connecting cavity of the first connecting static pressure box 203 and the fourth connecting cavity of the second connecting static pressure box 204, respectively. The return air nozzle 600 connected to the four connecting cavities is then ejected at high speed through the return air nozzle 600. The drainage effect of the high-speed ejected return air reduces the pressure of the induction chamber, thereby inducing another part of the indoor air to flow into the lower part of the induction chamber from the second return air port 1052 of the bottom plate 105, generating return air induction wind. The return air induction wind is cooled or heated by the second heat exchange zone of the heat exchange coil 300, mixed with the return air in the upper part of the induction chamber, and then sent out through the first air supply port 1053 and the second air supply port 1054 on the bottom plate 105 to cool or heat the room.

[0058] In the fresh air working mode, the fan 400 is turned off and the heat exchange coil 300 does not work. The fresh air of the primary air enters the primary air static pressure box 201 through the primary air inlet 2011. The fresh air in the primary air static pressure box 201 enters the first connecting cavity of the first connecting static pressure box 203 and the third connecting cavity of the second connecting static pressure box 204 through the first opening and the second opening at the bottom of the primary air static pressure box 201 respectively, and then enters the primary air nozzle 500 connected to the first connecting cavity and the third connecting cavity respectively, and then is ejected at high speed through the primary air nozzle 500. The high-speed ejection of fresh air has a drainage effect that reduces the pressure of the induction cavity, thereby inducing the indoor air to flow into the lower part of the induction cavity from the second return air port 1052 on the bottom plate 105, forming a primary air induced wind. After the primary air induced wind passes through the second heat exchange zone of the heat exchange coil 300, it is mixed with the fresh air at the upper part of the induction cavity, and then is sent out through the first air supply port 1053 and the second air supply port 1054 on the bottom plate 105 to provide fresh air to the room.

[0059] Example 2

[0060] Another specific embodiment of the present invention discloses an induction-type fan coil ceiling air conditioner, which differs from Example 1 in that two groups of heat exchange coils 300 are provided (i.e., two heat exchange coils 300 are provided), one group (one heat exchange coil 300) is located in the fan cavity, and the other group (i.e., the other heat exchange coil 300) is located in the induction cavity. The two groups of heat exchange coils 300 operate independently and can cool or heat independently or simultaneously. The heat exchange coils 300 are ordinary coils, and the heat exchange coils 300 are fin-type heat exchangers with a copper tube and aluminum fin structure. Other parts that are the same as Example 1 are not repeated here.

[0061] Example 3

[0062] Another specific embodiment of the present invention is as follows Figure 7 As shown, an induction-type fan-coil ceiling air conditioner is disclosed. This differs from Example 1 in that a group of heat exchange coils 300 are provided, all located in the induction chamber. No heat exchange coils 300 are provided in the fan chamber. Heat exchange coils 300 utilize conventional coils and are fin-type heat exchangers with a copper tube and aluminum fin structure. Other components identical to Example 1 are not detailed here.

[0063] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. An induction type fan coil ceiling air conditioner, characterized in that: The invention comprises a box (100), an air duct unit (200), a heat exchange coil (300), a fan (400), a primary air nozzle (500) and a return air nozzle (600), wherein the air duct unit (200) is arranged at the top of the box (100) and is communicated with the inner cavity of the box (100), the inner cavity of the box (100) is divided into a fan cavity and an induction cavity, the fan (400) is located in the fan cavity and is connected to the air duct unit (200), the primary air nozzle (500) and the return air nozzle (600) are both located in the induction cavity, and the primary air nozzle (500) and the return air nozzle (600) are both connected to the air duct unit (200), and the heat exchange coil (300) is arranged at the bottom of the inner cavity of the box (100).

2. The induction type fan coil ceiling air conditioner according to claim 1, characterized in that: The air duct unit (200) comprises a primary air static pressure box (201), a first connecting static pressure box (203) and a second connecting static pressure box (204); the first connecting static pressure box (203) and the second connecting static pressure box (204) are both arranged below the primary air static pressure box (201) and are both connected to the primary air static pressure box (201); the first connecting static pressure box (203) and the second connecting static pressure box (204) are both provided with the primary air nozzle (500) and the return air nozzle (600).

3. The induction type fan coil ceiling air conditioner according to claim 2, characterized in that: The air duct unit (200) further comprises a return air static pressure box (202), wherein the first connecting static pressure box (203) and the second connecting static pressure box (204) are respectively located on both sides of the return air static pressure box (202) and are both connected to the return air static pressure box (202).

4. The induction type fan coil ceiling air conditioner according to claim 3, characterized in that: The first communicating static pressure box (203) is divided into a plurality of first communicating cavities and a plurality of second communicating cavities that are staggered. The primary air nozzle (500) provided on the first communicating static pressure box (203) is communicated with the first communicating cavity, and the return air nozzle (600) provided on the first communicating static pressure box (203) is communicated with the second communicating cavity.

5. The induction type fan coil ceiling air conditioner according to claim 4, characterized in that: The second communicating static pressure box (204) is divided into a plurality of third communicating chambers and a plurality of fourth communicating chambers that are staggered. The primary air nozzle (500) provided on the second communicating static pressure box (204) is communicated with the third communicating chamber, and the return air nozzle (600) provided on the second communicating static pressure box (204) is communicated with the fourth communicating chamber.

6. The induction type fan coil ceiling air conditioner according to claim 5, characterized in that: A plurality of first openings and a plurality of second openings are respectively provided on both sides of the bottom along the length direction of the primary air static pressure box (201), the first openings being communicated with the first communicating cavity, and the second openings being communicated with the third communicating cavity.

7. The induction type fan coil ceiling air conditioner according to claim 5, characterized in that: A plurality of third openings and a plurality of fourth openings are provided on both sides along the length direction of the return air static pressure box (202), the third openings being in communication with the second communicating cavity, and the fourth openings being in communication with the fourth communicating cavity.

8. The induction type fan coil ceiling air conditioner according to any one of claims 1 to 7, characterized in that: The box body (100) includes a first partition (106), and the first partition (106) divides the inner cavity of the box body (100) into the fan cavity and the induction cavity.

9. The induction type fan coil ceiling air conditioner according to any one of claims 1 to 7, characterized in that: The box body (100) further includes a second partition (107) and a third partition (108) arranged in the induction chamber, wherein the second partition (107) and the third partition (108) are arranged in an eight-shaped shape, and the heat exchange coil (300) is arranged at the upper opening formed by the second partition (107) and the third partition (108).

10. The induction type fan coil ceiling air conditioner according to any one of claims 1 to 7, characterized in that: The bottom of the box body (100) is provided with a first return air port (1051), a second return air port (1052), a first air supply port (1053) and a second air supply port (1054).

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