Multi-layer heat exchange plate vertical parallel arrangement air conditioner indoor unit

Abstract

The application discloses an air conditioner indoor unit with multiple layers of heat exchange plates arranged vertically and in parallel, comprising multiple layers of heat exchange plates arranged vertically and in parallel and forming heat exchange gaps, heat exchange medium pipelines arranged in the heat exchange plates, the heat exchange medium pipelines configured to receive external cooling medium to cool air in the heat exchange gaps through the heat exchange plates to form low-temperature high-density air; further comprising a return air area and an air outlet area, the return air area, the heat exchange gaps, the air outlet area and an indoor space sequentially communicated and forming a gas passage; the low-temperature high-density air in the heat exchange gaps slides along the plate surface of the heat exchange plates towards the air outlet area, converges to form a sinking air flow to form a negative pressure in the air outlet area; the negative pressure drives indoor air to enter the heat exchange gaps through the return air area, after convection heat exchange and radiation heat exchange with the heat exchange plates, the indoor air slides out of the heat exchange gaps towards the air outlet area and is output to the indoor space, and a natural circulation air flow is established.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, and particularly relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side, an air conditioning indoor unit module, and an air conditioning system for building spaces. Background Technology

[0002] In the construction industry, implementing the architectural design and decoration concepts of "safety, comfort, greenness, and intelligence" and achieving constant temperature, humidity, oxygen, quietness, and cleanliness ("five constants") in indoor spaces has always been the pursuit of the architectural design and HVAC industry.

[0003] Currently, all indoor air conditioning units, whether split-type or central air conditioning units, are fan coil units, differing only in the refrigerant. During operation, the mechanical vibration and friction of the fan motor, the friction between the fan impeller and the airflow, the friction between the airflow and the inlet / outlet and ductwork, and the turbulence of the airflow itself all contribute to the noise emitted into the indoor space. The combined noise levels typically exceed 20 dB. This is unbearable for bedrooms and studies in residential buildings, as well as for public and commercial buildings such as hotels, auditoriums, hospitals, educational buildings, libraries, museums, and concert halls. Despite numerous technological iterations and product optimizations, including the widespread adoption of DC inverter motors, sound absorption, and noise reduction technologies, and even the introduction of adaptive algorithms to dynamically adjust fan speed and guide vane angles to reduce airflow disturbance, the operating noise of fan coil units still exceeds 15 dB. Some noises are inherent to the physical processes of cooling and heating in fan coil units and are fundamentally unavoidable, such as the friction noise from the interaction between the fan impeller and the airflow. Radiant air conditioners have emerged as a popular choice due to their ability to reduce operating noise to near-zero levels by eliminating the need for a fan, making them a hit in the market. However, their cooling capacity is significantly lower, typically not exceeding 100 W / m², making it difficult to meet the air conditioning load demands of residential spaces, let alone densely populated public spaces and commercial / cultural spaces. Developing an indoor air conditioning unit that combines the quiet operation of radiant air conditioners with the heat exchange capacity of fan coil units presents a formidable challenge for the air conditioning industry. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an air conditioning indoor unit, an air conditioning indoor unit module and an air conditioning system for building space with multi-layer heat exchange plates arranged vertically in parallel, so as to overcome the problems of high operating noise of existing fan coil type air conditioning indoor units and insufficient cooling intensity of radiant air conditioning.

[0005] To solve the above problems, the technical solution of the present invention is as follows: An indoor air conditioning unit of the present invention comprises: multiple heat exchange plates arranged vertically side by side, with heat exchange gaps formed between adjacent heat exchange plates; heat exchange medium pipelines are provided within the heat exchange plates, the heat exchange medium pipelines being configured to receive external cooling medium to cool the air in the heat exchange gaps through the heat exchange plates, forming low-temperature, high-density air; and a return air area and an outlet air area, the return air area, the heat exchange gaps, the outlet air area, and the indoor space being sequentially connected to form a gas passage; wherein, the low-temperature, high-density air in the heat exchange gaps slides along the surface of the heat exchange plates toward the outlet air area, converging in the outlet air area to form a descending airflow and creating negative pressure in the outlet air area, the negative pressure serving as the main driving force for the air in the indoor space to flow along the gas passage, driving the indoor air through the return air area into the heat exchange gaps, where it undergoes convective and radiative heat exchange with the heat exchange plates, and then slides out from the heat exchange gaps toward the outlet air area and is output to the indoor space, establishing a natural circulating airflow.

[0006] In the air conditioning indoor unit of the present invention, the length of the heat exchange plate near the return air area is not greater than the length of the heat exchange plate away from the return air area.

[0007] The air conditioning indoor unit of the present invention has multiple heat exchange plates arranged vertically side by side, and the length of each heat exchange plate gradually increases from the side closer to the return air area toward the side farther away from the return air area.

[0008] The present invention relates to an air conditioning indoor unit in which multi-layer heat exchange plates are arranged vertically side by side. The multi-layer heat exchange plates form a plurality of heat exchange plate groups, and the heat exchange plates in each heat exchange plate group have the same length. Among the adjacent heat exchange plate groups, the heat exchange plate length of the heat exchange plate group closer to the return air area is smaller than the heat exchange plate length of the heat exchange plate group farther away from the return air area.

[0009] The present invention relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side. A transition channel is provided between the return air area and the heat exchange gap. The return air area is connected to the heat exchange gap through the transition channel to increase the distance between the return air inlet of the return air area and the air outlet of the air outlet area.

[0010] In the air conditioning indoor unit of the present invention, the cooling medium in the heat exchange medium pipeline flows in the opposite direction to the air flow in the heat exchange gap.

[0011] The present invention relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side, wherein the heat exchange plates are made of metal or plastic.

[0012] In the air conditioning indoor unit of the present invention, the low-temperature, high-density air in each heat exchange gap sinks downward through the air outlet area, and the outermost airflow forms a cylinder wall effect to protect the continuity of the low-temperature, high-density airflow inside and prevent the low-temperature airflow inside from spreading laterally, thus forming a concentrated downward force in a vertical tube configuration.

[0013] The air conditioning indoor unit of the present invention, in which multi-layer heat exchange plates are arranged vertically side by side, further includes a housing, on which a return air inlet and an air outlet are respectively provided corresponding to the return air area and the air outlet area; the multi-layer heat exchange plates are arranged inside the housing, and the multi-layer heat exchange plates cooperate with the housing to form the return air area and / or the air outlet area.

[0014] The present invention relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side. The air conditioning indoor unit is installed in the ceiling through the housing, and the air outlet of the air outlet area and the air return outlet of the air return area face the indoor space below.

[0015] An air conditioning indoor unit with vertically arranged multi-layer heat exchange plates according to the present invention includes: a housing; multi-layer heat exchange plates arranged in the housing, the multi-layer heat exchange plates being arranged vertically in parallel, with heat exchange gaps formed between adjacent heat exchange plates, and heat exchange medium pipelines provided within the heat exchange plates, the heat exchange medium pipelines being configured to receive external heat exchange medium; wherein, the multi-layer heat exchange plates, in conjunction with the housing, form a high-level region above and a low-level region below, the high-level region and the low-level region respectively connecting to the heat exchange gaps; in the cooling state, the high-level region, the heat exchange gaps, the low-level region, and the indoor space are sequentially connected to form a refrigerant gas passage, the heat exchange medium pipelines receiving external heat exchange medium to cool the air in the heat exchange gaps through the heat exchange plates, forming low-temperature, high-density air; the low-temperature, high-density air slides along the surface of the heat exchange plates toward the low-level region to converge in the low-level region to form a descending airflow and create negative pressure on the high-level region, the negative pressure driving the air in the indoor space along the refrigerant gas passage. The main driving force for the airflow in the heat exchange channel is to drive indoor air through the high-level region into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plate, the air slides out from the heat exchange gap toward the low-level region and is output to the indoor space, establishing a natural circulation airflow. In the heating state, the low-level region, the heat exchange gap, the high-level region, and the indoor space are sequentially connected to form a heating gas passage. The heat exchange medium pipeline receives external heat exchange medium to heat the air in the heat exchange gap through the heat exchange plate, forming high-temperature, low-density air. The high-temperature, low-density air slides along the surface of the heat exchange plate toward the high-level region to converge in the high-level region to form an upward airflow and create negative pressure in the low-level region. This negative pressure serves as the main driving force for the air in the indoor space to flow along the heating gas passage, driving indoor air through the low-level region into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plate, the air slides out from the heat exchange gap toward the high-level region and is output to the indoor space, establishing a natural circulation airflow.

[0016] The present invention relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side, wherein the air conditioning indoor unit is installed on the ground or on the side wall of an indoor space through the housing.

[0017] The air conditioning indoor unit of the present invention has multiple heat exchange plates arranged vertically side by side, and the length of each heat exchange plate gradually shortens from the side closest to the side wall toward the side away from the side wall; wherein, the upper end of each heat exchange plate cooperates to form a high-level inclined surface that is connected to and faces the high-level region, and the high-level inclined surface is inclined to the horizontal plane.

[0018] The air conditioning indoor unit of the present invention has multiple heat exchange plates arranged vertically side by side. The lower ends of each heat exchange plate cooperate to form a low-level inclined surface that is connected to and faces the low-level region. The low-level inclined surface is inclined to the horizontal plane.

[0019] The present invention relates to an indoor air conditioning unit in which multi-layer heat exchange plates are arranged vertically side by side. The multi-layer heat exchange plates form a plurality of heat exchange plate groups, and each heat exchange plate in each heat exchange plate group has the same length. Among adjacent heat exchange plate groups, the heat exchange plate length of the heat exchange plate group closer to the side wall is greater than the heat exchange plate length of the heat exchange plate group farther from the side wall.

[0020] The present invention relates to an air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side. The housing is provided with a high-level air outlet connecting the high-level area and the indoor space, and a low-level air outlet connecting the low-level area and the indoor space. The high-level air outlet is located on the top plate of the housing and / or the side plate of the housing away from the side wall, and the low-level air outlet is located on the bottom plate of the housing and / or the side plate of the housing away from the side wall.

[0021] An air conditioning indoor unit module of the present invention includes two air conditioning indoor units with multi-layer heat exchange plates arranged vertically side by side as described in any one of the above claims; the two air conditioning indoor units are arranged adjacent to each other; wherein, the return air areas of the two air conditioning indoor units are arranged adjacent to each other and the air outlet areas are arranged opposite to each other, or, the air outlet areas of the two air conditioning indoor units are arranged adjacent to each other and the return air areas are arranged opposite to each other.

[0022] The present invention provides a building space air conditioning system, comprising several groups of air conditioning indoor units arranged vertically side by side with multi-layer heat exchange plates as described in any one of the above claims and / or several groups of air conditioning indoor unit modules as described in the above claims, wherein the several groups of air conditioning indoor units arranged vertically side by side with multi-layer heat exchange plates and / or the air conditioning indoor unit modules are arranged at intervals.

[0023] An air conditioning system for building space according to the present invention includes the air conditioning indoor unit module described above. The return air area of ​​the air conditioning indoor unit module, which is far from the boundary of the indoor space, is connected to a horizontally extending air duct. The extended return air outlet of the horizontally extending air duct is opened at a position far from the corresponding air outlet area.

[0024] Because the present invention adopts the above technical solution, it has the following advantages and positive effects compared with the prior art: 1. Completely eliminate the operating noise of the air conditioner indoor unit. One embodiment of this application describes an air conditioning indoor unit with multiple heat exchange plates arranged vertically side-by-side. By arranging the multiple heat exchange plates vertically side-by-side, the air in the heat exchange gap is cooled to form low-temperature, high-density air. This low-temperature, high-density air slides along the surface of the heat exchange plates towards the air outlet area, converging to form a descending airflow and creating negative pressure in the air outlet area. This negative pressure serves as the main driving force, driving indoor air through the return air area into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plates, the air slides out from the heat exchange gap towards the air outlet area and is output to the indoor space, establishing a natural airflow circulation. Since the natural convection circulation occurs within a closed space, the upward buoyancy of the low-temperature airflow in the indoor unit after heating and the downward force of the low-temperature airflow in the air outlet area are inextricably linked. The downward force of the low-temperature airflow in the air outlet area of ​​the air conditioning indoor unit and the buoyancy of the low-temperature airflow in the indoor unit after heating and the air outlet area together drive the natural convection circulation of the indoor air. The entire circulation process relies on a physical chain of air cooling down - density increase - sliding along the plate surface - forming negative pressure - driving air flow, which can complete the circulation and heat exchange of indoor air without the need for a fan.

[0025] This allows the indoor unit of the air conditioner in this embodiment to eliminate the fan, which is present in traditional fan coil unit indoor units. This eliminates the noise generated by the fan coil unit at its source, including mechanical vibration and friction of the fan motor, friction between the fan impeller and the airflow, friction between the airflow and the air inlet / outlet, friction between the airflow and the duct, and turbulence of the airflow itself. Therefore, this embodiment fundamentally eliminates the operating noise of the indoor unit, reducing the noise level during operation to 10. 0 dB level, almost zero.

[0026] II. High heat exchange intensity and high refrigeration efficiency The airflow power in one embodiment of this application comes from the downward force of the cold air at the outlet of the vertically arranged multi-layer heat exchange plates in the indoor space, i.e., the concentrated downward force of the vertical tube, and the buoyancy of the low-temperature airflow in the indoor space after being heated. The combination of these factors makes the total airflow power reach 10. 0 PA level or even 10 1 It has a Pa level and continuous stability, drives indoor air circulation, and in particular drives the air flow between the gaps of the multi-layer heat exchange plates to achieve convective heat exchange with the heat exchange plate surface.

[0027] One embodiment of the air conditioner indoor unit of this application has a multi-layer heat exchange plate. Not only are there multiple heat exchange plates, but each plate is also double-sided heat exchanged. The total heat exchange area is huge, far exceeding the radiant heat absorption surface area of ​​a radiant air conditioner. It can reach twice or even more than the net area of ​​the ceiling of the indoor space.

[0028] In one embodiment of this application, the cooling medium input end and cooling medium output end of the heat exchange medium pipeline of the multi-layer heat exchange plate of the air conditioner indoor unit are respectively located in the air outlet area and the air return area, forming a counter-current heat exchange operation between the airflow between the plates and the cooling medium in the pipeline, thereby improving the heat exchange efficiency.

[0029] 3. Good indoor space comfort Because of the low temperature and high density characteristics of the descending airflow in the air outlet area of ​​the air conditioner indoor unit, which is arranged vertically with multiple heat exchange plates in one embodiment of this application, the temperature difference between the air outlet area and the room temperature air is around 7°C, which is much smaller than the inlet and outlet air temperature difference of about 15°C in the traditional fan coil unit. Therefore, the temperature field gradient of the indoor space in this embodiment is significantly smaller than the temperature field gradient in the fan coil unit scenario, that is, the uniformity of the indoor space temperature field is significantly improved.

[0030] Because the air outlet area of ​​the air conditioner indoor unit, which has multiple heat exchange plates arranged vertically in parallel according to one embodiment of this application, is much larger than that of the air outlet of a traditional fan coil unit, reaching 10 times or even higher, the air outlet speed of the air conditioner indoor unit is greatly reduced under the same cooling load, eliminating the low-temperature rapid impact airflow of traditional air conditioner indoor units. The downward airflow velocity in the outlet area is on the order of 1 m / s. When it reaches the bottom of the indoor space and diffuses to the position of the human body, the airflow velocity is further reduced to 0.2 m / s or less, which is basically imperceptible to the human body. The airflow velocity and velocity field gradient in the indoor space are significantly smaller than those in the fan coil unit scenario, and the "wind feeling" in the indoor space is extremely weak.

[0031] In summary, the comfort characteristics of the indoor space temperature field, temperature gradient field, airflow velocity field, and velocity gradient field in this embodiment are far superior to those in the traditional fan coil unit scenario.

[0032] IV. Strong self-repairing ability of spatial airflow field The air outlet pattern of the air conditioner indoor unit, which has multiple heat exchange plates arranged vertically in parallel in this embodiment, is easily disrupted by factors such as indoor fresh air replacement and the opening and closing of doors and windows; the air circulation in the indoor space is also easily interrupted by factors such as indoor fresh air replacement and the opening and closing of doors and windows.

[0033] However, the cold air from the air outlet of the vertically arranged multi-layer heat exchange plates in this embodiment is a spatial convergence of low-temperature, high-density cold air discharged from multiple gaps between the multi-layer heat exchange plates. It has a spatial integration effect of "1+1>2" and its anti-interference ability is much greater than that of low-temperature, high-density exhaust air from a single gap between the plates. Its downward force in the indoor space can quickly complete the dynamic reconstruction and path restoration after the environmental disturbance ends. That is, the concentrated downward force of the vertical tube is very easy to recover, and the self-repairing ability of the indoor space airflow field, including the temperature field and velocity field, is very strong. Attached Figure Description

[0034] Figure 1 This is a three-dimensional view of a single heat exchange plate according to Embodiment 1 of the present invention; Figure 2 This is a three-dimensional view of an air conditioner indoor unit with multiple heat exchange plates arranged vertically side by side according to Embodiment 1 of the present invention; Figure 3 This is a vertical sectional view of an air conditioner indoor unit with multi-layer heat exchange plates arranged vertically side by side according to Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the overall structure of the vertically arranged multi-layer heat exchange plates according to Embodiment 1 of the present invention; Figure 5 This is a vertical cross-sectional view of the airflow in the indoor unit of an air conditioner with multi-layer heat exchange plates arranged vertically side by side according to Embodiment 1 of the present invention. Figure 6 This is a vertical sectional view of the structure of an air conditioning indoor unit with a stepped change in the length of multiple heat exchange plates according to Embodiment 2 of the present invention. Figure 7 This is a schematic diagram of the structure of an air conditioning indoor unit module formed by two multi-layer heat exchange plates arranged vertically side by side and back to back, according to Embodiment 3 of the present invention. Figure 8 This is a schematic diagram of the vertical airflow field in the indoor space during the operation of the multi-row air conditioner indoor unit module in Embodiment 4 of the present invention; Figure 9 This is a schematic diagram of the vertical airflow field in the indoor space during operation of the asymmetric design of the air conditioner indoor unit module in Embodiment 5 of the present invention. Figure 10 This is a vertical sectional view of the structure of the indoor unit of a room air conditioner, which is a combination of heat exchange plates arranged vertically side by side in the wardrobe according to Embodiment 6 of the present invention. Figure 11 This is a vertical cross-sectional view of the room air conditioner indoor unit, which drives the natural circulation of airflow in the room, with the heat exchange plate group of the combined entry into the wardrobe arranged vertically side by side according to Embodiment 6 of the present invention. Figure 12 This is a vertical sectional view of the indoor unit of an air conditioner according to Embodiment Seven of the present invention; Figure 13 This is a vertical sectional view of the airflow during operation of the indoor unit of an air conditioner according to Embodiment 7 of the present invention.

[0035] Explanation of reference numerals in the attached diagram: 1. Heat exchange plate; 2. Heat exchange medium pipeline; 21. Cooling medium inlet; 22. Cooling medium outlet; 3. Heat exchange gap; 4. Return air area; 5. Air outlet area; 6. Shell; 61. Return air inlet; 62. Air outlet; 63. High-level air outlet; 64. Low-level air outlet; 7. Indoor unit module; 8. Horizontal extension duct; 81. Extension return air inlet; 9. Transition channel; 10. High-level area; 11. Low-level area. Detailed Implementation

[0036] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed account of an air conditioning indoor unit, an air conditioning indoor unit module, and a building space air conditioning system with vertically arranged multi-layer heat exchange plates, as proposed in this invention. The advantages and features of this invention will become more apparent from the following description and claims.

[0037] Example 1 See Figures 1 to 5 In one embodiment, an indoor air conditioning unit with multiple heat exchange plates arranged vertically side by side mainly includes multiple heat exchange plates.

[0038] The multi-layer heat exchange plate includes at least two heat exchange plates 1 arranged vertically side by side, with a heat exchange gap 3 formed between adjacent heat exchange plates 1. The heat exchange plates 1 can specifically adopt a tube sheet structure, and the material of the heat exchange plates can be metal or plastic, such as aluminum plates, steel plates, plastic plates, etc. A heat exchange medium pipeline 2 is provided inside the heat exchange plate 1. The material of the heat exchange medium pipeline 2 can also be metal or plastic, such as plastic pipes, aluminum pipes, copper pipes, or other metal pipes. The heat exchange medium pipeline 2 is configured to receive an external cooling medium (such as chilled water from an air conditioner) to cool the air within the heat exchange gap 3 through the heat exchange plates 1, forming low-temperature, high-density air.

[0039] The indoor unit of the air conditioner in this embodiment also includes a return air zone 4 and an air outlet zone 5. The return air zone 4, the heat exchange gap 3, the air outlet zone 5 and the indoor space are connected in sequence to form a gas passage.

[0040] During operation, the cooling medium in the heat exchange medium pipeline 2 cools the air in the heat exchange gap 3 through the heat exchange plate 1. The air in the gap between the heat exchange plates 1 releases heat, cools down, and increases in density. The low-temperature, high-density air slides along the surface of the heat exchange plate 1 toward the air outlet area 5. The low-temperature, high-density air sliding out from multiple heat exchange plate gaps converges and rushes out of the air outlet area 5. The collective air passing through the lower part of the air sinks downward, forming a negative pressure in the air outlet area 5. This negative pressure serves as the main driving force, driving indoor air through the return air area 4 into the heat exchange gap 3. After convective and radiative heat exchange with the heat exchange plate 1, the air slides out of the heat exchange gap 3 toward the air outlet area 5 and is output to the indoor space, establishing a natural circulating airflow. The entire circulation process relies on the physical chain of air cooling down - density increase - sliding along the plate surface - forming negative pressure - driving airflow, completing the circulating heat exchange of indoor air without the need for a fan.

[0041] The specific structure of the air conditioner indoor unit in this embodiment will be further described below: In this embodiment, the multi-layer heat exchange plate 1 is fixed on a metal structural frame and combined with the pipe interfaces of the return air area 4, the air outlet area 5 and the heat exchange medium pipeline 2 to form a standardized module that can be installed in groups on the ceiling.

[0042] Furthermore, the cooling medium input end 21 of the heat exchange medium pipeline 2 is set corresponding to the air outlet area 5, and the cooling medium output end 22 is set corresponding to the return air area 4, so that the flow direction of the cooling medium in the heat exchange medium pipeline 2 is opposite to the air flow direction in the heat exchange gap 3, realizing counter-current heat exchange and improving heat exchange efficiency. Alternatively, both the cooling medium input end 21 and the cooling medium output end 22 of the heat exchange medium pipeline 2 are set in the return air area 4, and the cooling medium input end 21 is directly connected to the pipeline in the air outlet area 5 through a short pipe. The cooling medium input end 21 and the cooling medium output end 22 of the heat exchange medium pipeline 2 of each heat exchange plate 1 are respectively connected to the main water inlet pipe and the main water outlet pipe of the indoor unit of the air conditioner. The main water inlet pipe and the main water outlet pipe are then connected to the chilled water output water circuit of the air conditioner unit, thereby realizing the circulation of cooling water.

[0043] In this embodiment, the length of the heat exchange plate 1 near the return air region 4 is no greater than the length of the heat exchange plate 1 far from the return air region 4. That is, the length of the heat exchange plate 1 near the return air region 4 is shorter, and the length of the heat exchange plate 1 far from the return air region 4 is longer, so as to form an air outlet region 5 that discharges air to the lower space and a return air region 4 that draws air to the upper space.

[0044] Furthermore, a transition channel 9 is provided between the return air zone 4 and the heat exchange gap 3. The return air zone 4 is connected to the heat exchange gap 3 via the transition channel 9 to increase the distance between the return air inlet of the return air zone 4 and the air outlet of the outlet air zone 5, thereby avoiding interference and short circuit between the return airflow and the outlet airflow near the inlet and outlet, and ensuring the stable establishment of natural circulation airflow. Specifically, the transition channel 9 can be a horizontal channel.

[0045] In this embodiment, the indoor unit of the air conditioner also includes a housing 6 (specifically, a metal frame), on which a return air inlet 61 and an air outlet 62 are respectively provided for the return air area 4 and the air outlet area 5. Multi-layer heat exchange plates are arranged inside the housing 6, and the multi-layer heat exchange plates, together with the housing 6, form the return air area 4 and the air outlet area 5, and can be combined with the pipe interface of the heat exchange medium pipeline 2 to form a standardized module, which can be installed in groups on the ceiling.

[0046] Furthermore, the indoor unit of the air conditioner is suspended from the ceiling via the casing 6 (which can form a modular and standardized structure to adapt to ceiling installation requirements). The air outlet 62 of the air outlet area 5 and the return air outlet 61 of the return air area 4 face the indoor space below, forming a downward-opening flared opening, serving as the air inlet and outlet for the indoor unit to the indoor space below. The ceiling on which the indoor unit of the air conditioner in this embodiment is suspended from the ceiling, together with the four sides and bottom enclosure structure of the space below, encloses a "five-constant" physical space characterized by constant temperature, constant humidity, constant oxygen, constant quietness, and constant cleanliness.

[0047] In this embodiment, each heat exchange plate 1 in the multi-layer heat exchange plate is double-sided, giving the air conditioner indoor unit a huge heat exchange area, high heat exchange intensity, and high heat exchange efficiency. Furthermore, the multi-layer heat exchange plate of the ceiling-mounted air conditioner indoor unit in this embodiment has multiple air outlets arranged in a concentrated manner. Looking down from the ceiling, it can form a horizontally multi-layered and continuously distributed descending airflow funnel (i.e., multiple descending airflows arranged in parallel in the horizontal direction). This funnel-shaped, low-temperature, high-density descending airflow uses the indoor net height as its limit to plunge downwards, effectively expanding the negative pressure in the air outlet area of ​​the air conditioner indoor unit. This negative pressure becomes the main driving force for the closed-loop circulation of indoor airflow.

[0048] The operating characteristics of the air conditioning indoor unit with its multi-layer heat exchange plates arranged vertically side by side in this embodiment will be described below: When cold water is introduced into the heat exchange medium pipe 2 of the multi-layer heat exchange plate in the indoor unit of the air conditioner, the air in the gap between the heat exchange plates 1 releases heat and cools down, increasing its density. The low-temperature, high-density air slides downward along the plate surface of the heat exchange plate 1. The low-temperature, high-density air that slides out from multiple heat exchange gaps 3 gathers together and rushes out of the air outlet 62. The air flows downward through the bottom, and the indoor airflow is naturally circulated.

[0049] In this process, when the low-temperature, high-density air within each heat exchange gap 3 descends through the air outlet area 5, the outermost airflow forms a cylindrical wall effect, equivalent to a long, narrow cross-section cylindrical wall. This protects the continuity of the inner low-temperature, high-density airflow and prevents the lateral diffusion of the inner low-temperature airflow, thus forming a concentrated downward force in a vertical tube configuration. This concentrated downward force is the main driving force for the indoor air to flow through the air conditioner's indoor unit in this embodiment, descend, reheat, and return to the indoor unit, achieving a closed-loop circulation. It is also the key driving force for the natural circulation of indoor air without mechanical power. Since the natural convection circulation occurs inside a closed space, the upward buoyancy of the low-temperature airflow at the lower level indoors after being heated is twinned with the downward force of the low-temperature airflow at the aforementioned air outlet. The downward force of the low-temperature airflow at the high air outlet of the air conditioner's indoor unit and the buoyancy of the low-temperature airflow at the lower level indoors after being heated together drive the natural convection circulation of indoor air.

[0050] Under the combined effect of the "concentrated downward force of the vertical tube" and the "buoyancy of the low-temperature airflow after being heated in the room," the low-temperature air in the air outlet area 5 of the air conditioner unit in this embodiment moves downward and diffuses to both sides, driving the heated indoor air to move upward and to both sides. Finally, it enters the return air area 4 of the multi-layer heat exchange plate of the air conditioner unit, enters the heat exchange gap 3, and undergoes convective and radiative heat exchange with the cooling medium in the heat exchange medium pipeline 2. After cooling and increasing in density, it slides along the plate surface again towards the air outlet area 5, and then converges and exits again in the air outlet area 5, starting the next cycle. A single air conditioner unit of this embodiment can construct a D-shaped airflow field on the vertical surface of the indoor space.

[0051] This embodiment uses a temperature and humidity separation method to modulate indoor air: the air conditioning indoor unit with multiple heat exchange plates arranged vertically in parallel is linked with the fresh air dehumidification device. The air conditioning indoor unit is responsible for regulating the temperature of indoor air, while the fresh air dehumidification device is responsible for regulating the humidity of indoor air. The fresh air dehumidification device sends deeply dehumidified fresh air into the indoor space to reduce the relative humidity and absolute humidity of indoor air to prevent condensation on the heat exchange plate 1.

[0052] The beneficial effects of the air conditioning indoor unit with its multi-layer heat exchange plates arranged vertically side by side in this embodiment will be explained below: ① Completely eliminate the operating noise of the air conditioner indoor unit This embodiment uses a multi-layered heat exchange plate vertically arranged indoor unit, eliminating the fan of the traditional fan coil unit. This eliminates the noise generated by the fan coil unit at its source, including mechanical vibration and friction of the fan motor, friction between the fan impeller and the airflow, friction between the airflow and the inlet / outlet, friction between the airflow and the duct, and turbulence of the airflow itself. Therefore, the operating noise of the indoor unit is fundamentally eliminated, and the noise level during operation can be reduced to 10. 0 dB level, almost zero.

[0053] ② High heat exchange intensity and high cooling efficiency In this embodiment, the airflow power comes from the downward force of the cold air at the outlet of the vertically arranged multi-layer heat exchange plates within the indoor space, i.e., the concentrated downward force of the vertically arranged pipe system, and the airflow power can reach 10. 0 PA level or even 10 1 The system achieves PA-level heat exchange with continuity and stability, driving indoor air circulation, particularly by driving airflow between the multi-layer heat exchange plates to achieve convective heat exchange with the heat exchange plates 1. In this embodiment, the air conditioner indoor unit features a multi-layer heat exchange plate system, with each plate having double-sided heat exchange, resulting in a massive total heat exchange area far exceeding the radiant heat absorption surface area of ​​a radiant air conditioner, reaching twice or even more than the net area of ​​the indoor ceiling. Furthermore, in this embodiment, the cooling medium input end 21 and cooling medium output end 22 of the multi-layer heat exchange plate system are respectively located in the air outlet area 5 and the return air area 4, forming a counter-current heat exchange operation between the airflow between the plates and the cooling medium in the pipes, thus improving heat exchange efficiency.

[0054] ③ Good indoor space comfort In terms of comfort, the low-temperature, high-density characteristics of the descending airflow in the air outlet area 5 of the air conditioner in this embodiment are relative to the ambient temperature air in the indoor space. The temperature difference with the ambient temperature air is around 7°C, which is much smaller than the approximately 15°C temperature difference between the inlet and outlet air in a traditional fan coil unit. Therefore, the temperature field gradient in the indoor space in this embodiment is significantly smaller than that in the fan coil unit scenario, and the uniformity of the indoor space temperature field is significantly improved. Furthermore, the air outlet area of ​​the air conditioner in this embodiment is much larger than that of a traditional fan coil unit, reaching 10 times or even more. Under the same cooling load, the air outlet velocity of the air conditioner in this embodiment is greatly reduced, eliminating the low-temperature, rapid, and impactful airflow of a traditional air conditioner in this embodiment. The descending airflow velocity in the air outlet area 5 is on the order of 1 m / s. When it reaches the bottom of the indoor space and diffuses to the position of the human body, the airflow velocity further decreases to 0.2 m / s or less. That is, the airflow velocity and velocity field gradient in the indoor space in this embodiment are significantly smaller than those in the fan coil unit scenario, meaning that the "wind feel" in the indoor space in this embodiment is extremely weak. In summary, the comfort characteristics of the indoor space temperature field, temperature gradient field, airflow velocity field, and velocity gradient field in this embodiment are far superior to those in the traditional fan coil unit scenario.

[0055] ④ Strong self-repairing ability of spatial airflow field The air outlet pattern of the air conditioner indoor unit, with its multi-layer heat exchange plates arranged vertically in parallel in this embodiment, is easily disrupted by factors such as indoor fresh air replacement and the opening and closing of doors and windows. The air circulation within the indoor space is also easily interrupted by these disturbances. The cold air from outlet area 5 of the vertically arranged multi-layer heat exchange plates in this embodiment is a spatial convergence of low-temperature, high-density cold air discharged from multiple gaps between the plates, exhibiting a spatial integration effect of "1+1>2." Its anti-interference capability is far greater than that of low-temperature, high-density exhaust air from a single gap between plates. Furthermore, its downward force within the indoor space can quickly complete dynamic reconstruction and path restoration after the environmental disturbance ends; that is, the concentrated downward force of the vertical tube configuration is easily restored, and the self-repairing capability of the indoor airflow field, including its temperature and velocity fields, is extremely strong.

[0056] Example 2 See Figure 6 This embodiment provides another type of air conditioning indoor unit with vertically arranged multi-layer heat exchange plates, based on the first embodiment described above. The principle and operation of this embodiment are the same as those of the first embodiment, except that the multi-layer heat exchange plates 1 form several heat exchange plate groups, and the length of each heat exchange plate 1 within each heat exchange plate group is the same. Between adjacent heat exchange plate groups, the length of the heat exchange plate in the heat exchange plate group closer to the return air area 4 is less than the length of the heat exchange plate in the heat exchange plate group farther from the return air area 4. That is, each heat exchange plate group is arranged in a stepped manner along the direction away from the return air area 4, with the upper surface of the plate decreasing in a stepped manner.

[0057] In this embodiment, the multi-layer heat exchange plates 1 are arranged vertically side by side. The upper part of the plate surface is stepped down. The air inlet area of ​​the air conditioner indoor unit is still a triangular inclined surface in the vertical cross section. The cross-sectional area of ​​the air inlet is still roughly proportional to the air volume (return air volume). That is, the cross-sectional area of ​​the air inlet near the return air area 4 is large and the air volume is large, while the cross-sectional area of ​​the air inlet far from the return air area 4 is small and the air volume is small, thus maintaining the basic consistency of the return airflow velocity on each cross section. However, in this embodiment, the hypotenuse of the triangular air inlet area in the vertical cross section is no longer a straight line but a broken line, presenting a stepped broken line.

[0058] In this embodiment, the upper part of the multi-layer heat exchange plate 1 is stepped down, which not only maintains the triangular pattern of the air inlet area of ​​the air conditioner indoor unit in the vertical section, thus maintaining the basic consistency of the return airflow velocity in each cross section, but also simplifies the specifications of the heat exchange plate, making it easier to industrialize and reduce costs.

[0059] Example 3 See Figure 7 This embodiment provides an air conditioning indoor unit module 7 based on the above-described embodiment one or embodiment two. The air conditioning indoor unit module 7 of this embodiment includes two air conditioning indoor units with multi-layer heat exchange plates arranged vertically side-by-side as in embodiment one or embodiment two. The two air conditioning indoor units are arranged adjacent to each other, with their air outlet areas adjacent and their return air areas facing away from each other (i.e., the two air conditioning indoor units are arranged back-to-back). The air conditioning indoor unit module 7 is also ceiling-mounted, and the two air conditioning indoor units are combined to form a wider, downward-expanding flared opening, serving as the air inlet and outlet for the indoor space below.

[0060] In this embodiment, when the air conditioning indoor unit module 7, configured with opposite phases, is running, multiple layers of low-temperature, high-density airflow collectively emerge from the gaps between the heat exchange plates. As this airflow converges and descends collectively on the horizontal plane of the air outlet area, the outermost airflow forms a wall effect, protecting the continuity of the inner low-temperature, high-density airflow and preventing its lateral diffusion. This generates a greater concentrated downward force in the vertical pipe configuration. Under the action of this concentrated downward force, the low-temperature air in the air outlet area of ​​the air conditioning indoor unit module 7 moves downwards and to both sides, driving the indoor air to move upwards and to both sides. Finally, it enters the return air area of ​​the air conditioning indoor unit module, enters the heat exchange gaps, and exchanges heat with the chilled water in the pipes, beginning the next cycle. In this embodiment, the air conditioning indoor unit module constructs one or more ω-shaped airflow fields on the vertical surface of the indoor space.

[0061] In this embodiment, the air conditioning indoor units, which are arranged vertically side by side with multiple heat exchange plates, are paired up and arranged in opposite directions to form an air conditioning indoor unit module. This merges the air outlet areas of adjacent air conditioning indoor units, eliminating the mutual interference and friction of the airflow between two adjacent air conditioning indoor units, further reducing wind resistance and noise, and further improving operating efficiency. This is suitable for large-size and large-volume building spaces.

[0062] In other embodiments, the two adjacent indoor air conditioning units can also be configured such that their return air areas are adjacent and their air outlet areas are opposite to each other. This allows the low-temperature air on both sides to diffuse downwards and inwards during operation of the indoor air conditioning unit 7, driving the indoor air to move inwards and upwards, finally entering the two adjacent return air areas of the indoor air conditioning unit, entering the heat exchange gap to exchange heat with the chilled water in the pipes, and starting the next cycle.

[0063] Example 4 See Figure 8 This embodiment provides a building space air conditioning system based on the above embodiment three. In this embodiment, several sets of air conditioning indoor unit modules 7 from embodiment three and / or several air conditioning indoor units with multi-layer heat exchange plates from embodiment one or embodiment two are arranged vertically side by side under the ceiling at intervals. That is, the air conditioning indoor unit modules or individual air conditioning indoor units are repeatedly installed under the ceiling and used in combination periodically to serve a large building space.

[0064] This embodiment, by repeatedly installing and periodically combining the indoor air conditioning unit modules 7 and / or individual indoor air conditioning units under the ceiling, decomposes the vast architectural space into several "supply air zones" and "return air zones," resulting in a gentle breeze throughout the space and a balanced distribution of temperature, humidity, and airflow velocity fields. Furthermore, the combined arrangement of the main supply and return water pipes reduces installation workload and maintenance difficulty. This embodiment is suitable for large buildings and public spaces, especially theaters, libraries, museums, concert halls, hotels, and commercial office buildings that require quiet operation.

[0065] Example 5 See Figure 9 This embodiment provides another building space air conditioning system based on the above embodiment three. In this embodiment, the air conditioning indoor unit module in embodiment three is designed asymmetrically. Specifically, the return air area of ​​the air conditioning indoor unit module that is far from the boundary of the indoor space (i.e., close to the center of the indoor space) is connected to a horizontally extending air duct 8. The extended return air outlet 81 of the horizontally extending air duct 8 is opened at a position far from the corresponding air outlet area, thereby increasing the distance between the extended return air outlet 81 of the air conditioning indoor unit and the air outlet, expanding the service space range, and ensuring the air conditioning intensity around the indoor space.

[0066] In this embodiment, by adding a horizontally extended air duct 8 to the indoor unit of the air conditioner module located near the center of the indoor space, the distance between the extended return air vent 81 and the air outlet of the indoor unit is increased, thereby expanding the service space range and ensuring the air conditioning intensity around the indoor space. Because in many scenarios, the air conditioning load of the indoor space comes from the external environment, especially from the exterior walls, it is necessary to arrange the air conditioning capacity along the perimeter of the indoor space.

[0067] Furthermore, in this embodiment, the asymmetrically designed air conditioning indoor unit module can also be set to be repeatedly installed on the ceiling and used in combination periodically, thereby adapting to large-scale building and public space scenarios similar to those in Embodiment 4, decomposing the vast building space into several "air supply belts" and "air return belts", with a gentle breeze blowing throughout the space and a balanced layout of temperature field, humidity field, and airflow velocity field.

[0068] Example 6 See Figure 10 and Figure 11 This embodiment provides another type of air conditioning indoor unit with multiple layers of heat exchange plates arranged vertically side by side, based on the above embodiments one to five.

[0069] This embodiment operates on the same principle as the previous embodiments, relying on the downward force generated by the low-temperature, high-density air sliding down the plate surface within the heat exchange gap to drive the natural circulation of indoor air. The essential difference lies in the installation method and application scenario: In the previous embodiments, the air conditioner indoor unit was ceiling-mounted, and the vertical space of the heat exchange plate assembly was limited by the ceiling space, mainly serving public buildings and commercial and cultural building spaces; In this embodiment, the air conditioner indoor unit is floor-mounted or wall-mounted, and can be combined with storage systems such as wardrobes, expanding the vertical space of the heat exchange plate assembly from the ceiling space to a scale close to the room height, replacing the current fan coil unit indoor unit, and serving unit rooms.

[0070] Specifically, in this embodiment, the indoor unit of the air conditioner is floor-mounted via the casing 6 or installed on the side wall of the indoor space (e.g., integrated with a wardrobe). The high-position area 10 and the low-position area 11 are located vertically above and below the heat exchange plate assembly, respectively. That is, in the cooling mode of the indoor unit of the air conditioner in this embodiment, an airflow organization pattern of high-position return air and low-position outlet air is formed. Compared with the aforementioned embodiment with ceiling installation, the outlet area of ​​this embodiment is moved from below the indoor unit of the air conditioner to a low position close to the ground. The low-temperature airflow is output from the low-position outlet area and spreads directly close to the ground. After absorbing heat from the lower, middle, and upper parts of the room, it heats up and rises, forming a bottom-up displacement airflow organization, which is more conducive to the overall circulation of room air and the uniform distribution of the temperature field.

[0071] Furthermore, the housing 6 is provided with a high-level air vent 63 connecting the high-level area 10 and the indoor space, and a low-level air vent 64 connecting the low-level area 11 and the indoor space; wherein, the high-level air vent 63 is provided on the top plate of the housing 6 and / or the side plate of the housing 6 away from the side wall, and the low-level air vent 64 is provided on the bottom plate of the housing 6 and / or the side plate of the housing 6 away from the side wall. The high-level air vent 63 and the low-level air vent 64 respectively constitute the airflow inlet and outlet on the high and low sides between the indoor unit of the air conditioner and the indoor space. For example, when the housing 6 is floor-mounted, the low-level air vent 64 can be opened on the side plate of the housing 6 away from the side wall, while when the housing 6 is wall-mounted and the bottom is separated from the bottom surface by a certain distance, the low-level air vent 64 can be opened on the bottom plate of the housing 6.

[0072] Furthermore, in this embodiment, the multi-layer heat exchange plates 1 are longer inside and shorter outside, meaning that the length of each heat exchange plate 1 gradually shortens from the side closest to the sidewall towards the side furthest from the sidewall. Since the upper ends of the heat exchange plates 1 decrease in a stepped manner from the inside out, the upper ends of each heat exchange plate 1 cooperate to form a connected, high-level inclined surface facing the high-level region 10. This high-level inclined surface is inclined to the horizontal plane. The heated air in the upper part of the indoor space smoothly enters the high-level region 10 along the high-level inclined surface. The inclined arrangement of the high-level inclined surface gives the high-level region 10 a gradually expanding air intake cross-section facing the upper part of the indoor space, increasing the air intake area of ​​the high-level region 10 and reducing the return air resistance.

[0073] Correspondingly, as the lower end of the heat exchange plate 1 gradually rises from the inside out, the lower ends of each heat exchange plate 1 cooperate to form a low-level inclined surface that is connected and faces the low-level area 11. The low-level inclined surface is inclined to the horizontal plane. The low-temperature, high-density air in the heat exchange gap 3 slides down the plate surface of the heat exchange plate 1 to the lower end, and then flows through the low-level inclined surface and is output towards the lower part of the indoor space. The inclined arrangement of the low-level inclined surface makes the air outlet area have a gradually expanding air outlet cross section. After the low-temperature, high-density air is output through the low-level inclined surface, it spreads close to the ground.

[0074] Therefore, in this embodiment, the heat exchange plate assembly, together with the top plate and the bottom plate, forms an air inlet zone and an air outlet zone with a triangular longitudinal section. The upper end of the heat exchange plate 1 gradually decreases and the lower end gradually increases, so that the cross-sectional area of ​​the air inlet zone and the air outlet zone gradually expands along the airflow direction. The cross-sectional area of ​​the air inlet and the return air volume, and the cross-sectional area of ​​the air outlet and the air outlet volume are all in a positive linear relationship. That is, the cross-sectional area of ​​the air inlet near the return air zone is large and the air inlet volume is also large, while the cross-sectional area of ​​the air inlet far from the return air zone is small and the air inlet volume is also small. This maintains the basic consistency of the return airflow velocity and the air outlet velocity on each cross-section, avoids excessively high or low local wind speeds, and ensures the stable establishment of natural circulation airflow.

[0075] In this embodiment, when the air conditioner indoor unit is refrigerated, the low-temperature chilled water from the air conditioning unit enters the water coil of each heat exchange plate 1 and flows upward from the bottom of the heat exchange plate 1, exchanging heat with the descending airflow in the gaps between the heat exchange plates 1 in a counter-current manner. The temperature of the descending airflow in the gaps between the heat exchange plates 1 further decreases and the density further increases, and the airflow accelerates its descent. The low-temperature, high-density air that slides out from the gaps between multiple heat exchange plates 1 gathers together and flows out of the air outlet through the low-level inclined surface. After flowing out of the air outlet of the air conditioning indoor unit and entering the room, the low-temperature airflow spreads close to the ground, absorbs heat from the lower, middle and upper parts of the room, and rises upward. It gathers under the ceiling and is drawn in by the high-level area 10, entering the gaps between the multi-layer heat exchange plates 1 to start a new cycle. Meanwhile, the chilled water absorbs the heat released by the airflow, and after its temperature rises, it flows into the return water pipe and is sent to the air conditioning unit for cooling. Then it is sent back to the heat exchange plates 1 to start the next cycle.

[0076] In this embodiment, the air conditioner indoor unit with its multi-layered heat exchange plates arranged vertically side by side is floor-mounted and combined with a wardrobe. The vertical space of the heat exchange plates 1 in this indoor unit is close to the room height, reaching over 2 meters. This significantly increases the length and heat exchange area of ​​the heat exchange plates 1, correspondingly extending the downward travel of the air within the heat exchange gaps 3 along the surface of the heat exchange plates 1. In other words, this embodiment further amplifies the concentrated downward force "equivalent to a long vertical tube" as described in the previous embodiment: the low-temperature, high-density air within the heat exchange gaps 3 continuously releases heat and cools, its density continuously increases, and its downward movement accelerates during the longer vertical travel, thus strengthening the downward force. Furthermore, since natural convection circulation occurs within the enclosed room space, the buoyancy of the low-temperature airflow in the room after heating up is twinned with the downward force of the low-temperature airflow inside the air conditioner indoor unit. The downward force of the low-temperature airflow between the heat exchange plates inside the air conditioner indoor unit and the upward buoyancy of the low-temperature airflow in the room after heating up together drive the natural convection circulation of the indoor air. The downward force and upward buoyancy work together to drive the natural circulation of indoor air, achieving noiseless natural circulation of indoor air without the need for a fan.

[0077] This embodiment can also operate in heating mode. During heating operation, the heating hot water from the air conditioning unit enters the heat exchange medium pipes 2 of each heat exchange plate 1, flowing downwards from the top of the heat exchange plate 1, and undergoes counter-current heat exchange with the heated rising airflow in the gaps between the heat exchange plates 1. The temperature of the rising airflow further increases, and its density further decreases, causing the airflow to accelerate upwards. It is then output to the indoor space through the high-level area 10, releasing heat to the room before settling towards the ground and being drawn in by the low-level area 11, entering the gaps between the heat exchange plates 1 to begin a new cycle. Meanwhile, the heating hot water, after releasing heat to the airflow, decreases in temperature and flows into the return water pipe, being sent to the air conditioning unit for heating, and then back into the heat exchange plates 1, beginning the next cycle. The room air absorbs heat and heats up in the gaps between the heat exchange plates of the indoor unit, enhancing the upward force. The downward force of the high-temperature airflow in the indoor unit after releasing heat and cooling down, together drive the natural circulation of indoor air, achieving a noiseless natural circulation of indoor air without a fan.

[0078] This embodiment uses a temperature and humidity separation method to modulate indoor air: the air conditioning indoor unit with multiple heat exchange plates arranged vertically in parallel is linked with the fresh air dehumidification device. The air conditioning indoor unit is responsible for regulating the temperature of indoor air, while the fresh air dehumidification device is responsible for regulating the humidity of indoor air. The fresh air dehumidification device sends deeply dehumidified fresh air into the indoor space to reduce the relative humidity and absolute humidity of indoor air to prevent condensation on the heat exchange plate 1.

[0079] The advantages of this embodiment are as follows: by vertically arranging multiple heat exchange plates in parallel, the air conditioner indoor unit is combined with a storage system such as a wardrobe, constructing a new type of air conditioner indoor unit and its structural relationship with the indoor space. This inherits the characteristics of radiant cooling—no fan and zero noise—and significantly improves the heat exchange intensity by using multiple heat exchange plates vertically in parallel and double-sided heat exchange, thus solving the problem of insufficient radiant cooling intensity. In particular, this embodiment expands the vertical accommodating space of the heat exchange plate 1 to almost the height of the room through floor installation, which amplifies the downward force "equivalent to a long vertical pipe stroke" many times over, enabling the establishment of a stable and reliable natural air circulation even in residential spaces. The cross-sectional area of ​​the air return and outlet of the air conditioner indoor unit in this embodiment is much larger than that of traditional air conditioner indoor units, resulting in extremely low indoor air velocity. Combined with deep dehumidification of fresh air, this achieves an ultimate experience of extremely high thermal comfort from the fresh air air conditioner.

[0080] Example 7 See Figure 12 and Figure 13 This embodiment provides another type of air conditioning indoor unit with vertically arranged multi-layer heat exchange plates, based on the above-mentioned embodiment six. This embodiment shares the same principle, structure, and operation as embodiment six, both employing floor-standing or wall-mounted installation and integration with wardrobes. The multi-layer heat exchange plates 1 are arranged vertically side-by-side, with the inner layer longer than the outer layer. The high-position area 10 and the low-position area 11 are located above and below the heat exchange plate assembly, respectively. The heat exchange plate assembly, together with the top and bottom plates, forms a triangular air inlet and outlet area in longitudinal section. The difference lies in that this embodiment changes the plate length gradient of the multi-layer heat exchange plates 1 from a sequential, step-by-step change to a grouped, step-by-step change, simplifying the specifications of the heat exchange plates while maintaining the triangular pattern of the air inlet and outlet areas.

[0081] Specifically, in this embodiment, the multi-layer heat exchange plate 1 forms several heat exchange plate groups, and the heat exchange plates 1 in each heat exchange plate group have the same length. Between adjacent heat exchange plate groups, the heat exchange plate length of the heat exchange plate group closer to the side wall is greater than the heat exchange plate length of the heat exchange plate group farther from the side wall. That is, each heat exchange plate group is arranged in a stepped manner along the direction away from the side wall, and the upper and lower edges of the plate surface of each heat exchange plate group form steps with the adjacent heat exchange plate groups respectively.

[0082] ① The upper surface of the heat exchange plate group is stepped down. Therefore, in this embodiment, the hypotenuse of the triangular air inlet area in the vertical section is no longer a straight line but a broken line, presenting a stepped broken line, with each step corresponding to a heat exchange plate group. The high-level slope formed by the stepped down of the upper end of the heat exchange plate 1 is correspondingly broken line, but the air inlet area of ​​the air conditioner indoor unit is still triangular in the vertical section. The cross-sectional area of ​​the air inlet is still linearly proportional to the air volume (return air volume), that is, the cross-sectional area of ​​the air inlet near the high-level area 10 is large and the air volume is large, while the cross-sectional area of ​​the air inlet far from the high-level area 10 is small and the air volume is small, thereby maintaining the uniformity and consistency of the return airflow velocity on each cross-section.

[0083] ② The lower edge of the heat exchange plate assembly also rises in a stepped manner. Therefore, in this embodiment, the hypotenuse of the triangular air outlet area in the vertical cross-section is no longer a straight line but a broken line, presenting a stepped broken line. The lower slope formed by the gradual rise of the lower end of the heat exchange plate 1 is correspondingly broken, but the air outlet area of ​​the indoor unit of the air conditioner still has a triangular pattern in the vertical cross-section. The cross-sectional area of ​​the air outlet is still linearly proportional to the air volume, that is, the cross-sectional area of ​​the air outlet near the lower region 11 is large and the air volume is large, while the cross-sectional area of ​​the air outlet far from the lower region 11 is small and the air volume is small, thus maintaining the uniformity and consistency of the airflow velocity on each cross-section.

[0084] It should be noted that the stepped arrangement in Embodiment 2 is applied to the indoor unit of the air conditioner installed in the ceiling, and the stepped reduction on the upper part of the panel only affects the return air side; while the stepped tiered arrangement in this embodiment is applied to the indoor unit of the air conditioner installed on the floor, with the return air side (upper part of the panel) and the air outlet side (lower part of the panel) arranged in a stepped manner at the same time, so that both the high-level slope and the low-level slope are broken lines. Under the premise of maintaining the triangular pattern of the air inlet and air outlet areas (that is, maintaining the consistency of airflow velocity in each cross section), the specification type of heat exchange plate 1 is compressed from "changing one sheet at a time" to "changing in groups", and the specification compression is greater.

[0085] In this embodiment, the multi-layer heat exchange plate 1 is divided into several groups and arranged in a stepped manner. The heat exchange plates 1 in each group have the same height, which greatly reduces the types of heat exchange plates used in the indoor unit of the air conditioner, making it easier to carry out large-scale production and cost control.

[0086] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. An indoor air conditioning unit with multiple layers of heat exchange plates arranged vertically side by side, characterized in that, include: The multi-layer heat exchange plate is arranged vertically in parallel, with heat exchange gaps formed between adjacent heat exchange plates. A heat exchange medium pipeline is provided inside the heat exchange plate, and the heat exchange medium pipeline is configured to receive external cooling medium to cool the air in the heat exchange gap through the heat exchange plate, forming low-temperature, high-density air. It also includes a return air area and an outlet air area, wherein the return air area, the heat exchange gap, the outlet air area and the indoor space are sequentially connected to form a gas passage; In this process, the low-temperature, high-density air within the heat exchange gap slides along the surface of the heat exchange plate toward the air outlet area, converging to form a descending airflow and creating negative pressure in the air outlet area. This negative pressure serves as the primary driving force for the air in the indoor space to flow along the gas passage, driving the indoor air through the return air area into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plate, the air slides out of the heat exchange gap toward the air outlet area and is output to the indoor space, establishing a natural circulating airflow.

2. The air conditioning indoor unit with vertically arranged multi-layer heat exchange plates as described in claim 1, characterized in that, The length of the heat exchange plate near the return air area is no greater than the length of the heat exchange plate far from the return air area.

3. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 2, characterized in that, The length of each heat exchange plate gradually increases from the side closer to the return air area toward the side farther away from the return air area.

4. The air conditioning indoor unit with vertically arranged multi-layer heat exchange plates as described in claim 2, characterized in that... The multi-layer heat exchange plates form several heat exchange plate groups, and the heat exchange plates in each heat exchange plate group have the same length. Among adjacent heat exchanger groups, the length of the heat exchanger plate in the heat exchanger group closer to the return air area is shorter than the length of the heat exchanger plate in the heat exchanger group farther from the return air area.

5. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 1, characterized in that... A transition channel is provided between the return air area and the heat exchange gap. The return air area is connected to the heat exchange gap through the transition channel to increase the distance between the return air inlet of the return air area and the air outlet of the outlet air area.

6. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 1, characterized in that... The cooling medium in the heat exchange medium pipeline flows in the opposite direction to the air flow in the heat exchange gap.

7. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 1, characterized in that... The heat exchange plate is made of metal or plastic.

8. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 1, characterized in that... When the low-temperature, high-density air in each heat exchange gap descends through the outlet area, the outermost airflow forms a cylinder wall effect to protect the continuity of the inner low-temperature, high-density airflow and prevent the inner low-temperature airflow from spreading laterally, forming a concentrated downward force in a vertical tube configuration.

9. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 1, characterized in that... It also includes a housing, on which a return air inlet and an air outlet are respectively provided corresponding to the return air area and the air outlet area; the multi-layer heat exchange plate is arranged inside the housing, and the multi-layer heat exchange plate cooperates with the housing to form the return air area and / or the air outlet area.

10. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 9, characterized in that... The indoor unit of the air conditioner is installed in the ceiling through the housing, and the air outlet of the air outlet area and the return air outlet of the return air area face the indoor space below.

11. An indoor air conditioning unit with multiple layers of heat exchange plates arranged vertically side by side, characterized in that, include: case; A multi-layer heat exchange plate is arranged inside the shell. The multi-layer heat exchange plate is arranged vertically side by side, and a heat exchange gap is formed between adjacent heat exchange plates. A heat exchange medium pipeline is provided inside the heat exchange plate, and the heat exchange medium pipeline is configured to receive external heat exchange medium. The multi-layer heat exchange plate, together with the shell, forms a high-level region above it and a low-level region below it. The high-level region and the low-level region are respectively connected to the heat exchange gap. In the cooling state, the high-level region, the heat exchange gap, the low-level region, and the indoor space are sequentially connected to form a cooling gas passage. The heat exchange medium pipeline receives external heat exchange medium to cool the air in the heat exchange gap through the heat exchange plate, forming low-temperature, high-density air. The low-temperature, high-density air slides along the surface of the heat exchange plate toward the low-level region to converge in the low-level region, forming a descending airflow and creating negative pressure on the high-level region. This negative pressure serves as the main driving force for the air in the indoor space to flow along the cooling gas passage, driving the indoor air through the high-level region into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plate, the air slides out from the heat exchange gap toward the low-level region and is output to the indoor space, establishing a natural circulating airflow. In heating mode, the low-level region, the heat exchange gap, the high-level region, and the indoor space are sequentially connected to form a heating gas passage. The heat exchange medium pipeline receives external heat exchange medium to heat the air in the heat exchange gap through the heat exchange plate, forming high-temperature, low-density air. The high-temperature, low-density air slides along the surface of the heat exchange plate toward the high-level region to converge and form an upward airflow in the high-level region, creating negative pressure on the low-level region. This negative pressure serves as the main driving force for the air in the indoor space to flow along the heating gas passage, driving the indoor air through the low-level region into the heat exchange gap. After convective and radiative heat exchange with the heat exchange plate, the air slides out from the heat exchange gap toward the high-level region and is output to the indoor space, establishing a natural circulating airflow.

12. The air conditioning indoor unit with vertically arranged multi-layer heat exchange plates as described in claim 11, characterized in that, The indoor unit of the air conditioner is installed on the floor or on the side wall of the indoor space via the housing.

13. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 12, characterized in that, The length of each heat exchange plate gradually decreases from the side closest to the sidewall toward the side furthest from the sidewall; wherein the upper end of each heat exchange plate cooperates to form a high-level inclined surface that is connected to and faces the high-level region, and the high-level inclined surface is inclined to the horizontal plane.

14. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 13, characterized in that... The lower ends of each heat exchange plate are fitted together to form a low-level inclined surface that is connected to and faces the low-level region, and the low-level inclined surface is inclined to the horizontal plane.

15. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 12, characterized in that... The multi-layer heat exchange plates form several heat exchange plate groups, and the heat exchange plates in each heat exchange plate group have the same length. Among adjacent heat exchanger groups, the length of the heat exchanger plate in the heat exchanger group closer to the sidewall is greater than the length of the heat exchanger plate in the heat exchanger group farther from the sidewall.

16. The air conditioning indoor unit with multi-layer heat exchange plates arranged vertically side by side as described in claim 12, characterized in that... The housing is provided with a high-level air vent connecting the high-level area and the indoor space, and a low-level air vent connecting the low-level area and the indoor space. The high-level air vent is located on the top plate of the housing and / or on the side plate of the housing away from the side wall, and the low-level air vent is located on the bottom plate of the housing and / or on the side plate of the housing away from the side wall.

17. An air conditioner indoor unit module, characterized in that, The device includes two air conditioning indoor units with multi-layer heat exchange plates arranged vertically side by side as described in any one of claims 1 to 10; the two air conditioning indoor units are arranged adjacent to each other; wherein the return air areas of the two air conditioning indoor units are arranged adjacent to each other and the air outlet areas are arranged opposite to each other, or the air outlet areas of the two air conditioning indoor units are arranged adjacent to each other and the return air areas are arranged opposite to each other.

18. A building space air conditioning system, characterized in that, It includes several groups of air conditioning indoor units with multi-layer heat exchange plates arranged vertically side by side as described in any one of claims 1 to 10 and / or several groups of air conditioning indoor unit modules as described in claim 17, wherein the several groups of air conditioning indoor units with multi-layer heat exchange plates arranged vertically side by side and / or the air conditioning indoor unit modules are arranged at intervals.

19. A building space air conditioning system, characterized in that, The air conditioning indoor unit module as described in claim 17 is provided, wherein the return air area of ​​the air conditioning indoor unit away from the boundary of the indoor space is connected to a horizontally extending air duct, and the extended return air outlet of the horizontally extending air duct is opened at a position away from the corresponding air outlet area.

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