An integrated industrial air conditioning unit using flammable refrigerant

Abstract

The utility model relates to a kind of integrated industrial air conditioning unit using combustible refrigerant, indoor side air duct and outdoor side air duct are separated in shell using first partition, evaporator and air supply fan are placed in indoor side air duct, condenser and condensing fan are placed in outdoor side air duct, indoor side air duct is communicated with indoor space by air supply port and return air port, outdoor side air duct is communicated with outdoor space by air inlet and air outlet, air supply valve is installed at the air supply port, exhaust valve for selectively communicating with outdoor side air duct is installed on indoor side air duct, refrigerant detection device for detecting the content of combustible refrigerant is installed in shell, the refrigerant detection device is connected with controller, the controller is configured to control the air supply valve to close and exhaust valve to open in response to refrigerant leakage information.The utility model can handle combustible refrigerant leakage in time, ensure air conditioning unit use safety.

Description

Technical Field

[0001] This utility model belongs to the field of air conditioning equipment technology, and specifically relates to an integrated industrial air conditioning unit using a flammable refrigerant. Background Technology

[0002] Current industrial air conditioning units generally use conventional Freon refrigerants. While Freon is a non-flammable refrigerant, it has a significant destructive effect on the ozone layer and a substantial greenhouse effect. Currently, some air conditioning equipment uses more environmentally friendly flammable refrigerants. However, due to the flammability and explosiveness of flammable refrigerants, their use poses certain risks. If existing industrial air conditioning units directly use flammable refrigerants, leaks in the evaporator and connecting pipes connected to the indoor unit could allow the flammable refrigerant to directly enter the room, especially in enclosed spaces, easily causing an explosion, resulting in poor safety. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide an integrated industrial air conditioning unit that uses flammable refrigerant, which can promptly handle leaked flammable refrigerant and ensure the safety of the air conditioning unit.

[0004] To solve the aforementioned technical problem, the basic concept of the technical solution adopted by this utility model is as follows:

[0005] An integrated industrial air conditioning unit using a flammable refrigerant includes an indoor air duct and an outdoor air duct separated within the casing by a first partition. An evaporator and a blower are located in the indoor air duct, while a condenser and a condenser blower are located in the outdoor air duct. The indoor air duct connects to an indoor space via an air supply outlet and a return air outlet, and the outdoor air duct connects to an outdoor space via an air inlet and an air outlet. An air supply valve is installed at the air supply outlet, and an exhaust valve for selective connection with the outdoor air duct is installed on the indoor air duct. A refrigerant detection device for detecting the flammable refrigerant content is installed within the casing. The refrigerant detection device is connected to a controller configured to close the air supply valve and open the exhaust valve in response to refrigerant leakage information.

[0006] Furthermore, the refrigerant detection device is installed in the indoor side air duct.

[0007] Furthermore, the refrigerant detection device is installed in the indoor air duct between the evaporator and the air outlet.

[0008] Furthermore, in the indoor air duct, the blower is installed above the evaporator, and in the outdoor air duct, the condenser is installed below the condenser, and the compressor is installed to one side of the condenser.

[0009] Furthermore, the condenser and evaporator are installed in parallel on the front and rear sides of the internal space of the housing, the first partition is placed between the evaporator and the condenser, an air supply port and an air return port are provided on the front side plate of the housing corresponding to the air supply fan and the evaporator, and an air inlet and an air outlet are provided on the rear side plate of the housing corresponding to the condenser and the condensing fan.

[0010] Furthermore, a horizontally placed second partition is installed above the evaporator and condenser, and the blower is installed above the second partition. A vent is opened on the second partition corresponding to the air inlet side of the blower. The top of the first partition is fixedly connected to the second partition, and the bottom of the first partition is fixedly connected to the water collection tray below the evaporator. The compressor is installed below the water collection tray. The second partition, the first partition, and the water collection tray are used to separate the outdoor air duct and the indoor air duct.

[0011] Furthermore, the exhaust valve is installed on the second partition located on top of the outdoor air duct, connecting the indoor air duct above the second partition with the outdoor air duct.

[0012] Furthermore, an exhaust port extending in a direction parallel to the condenser is provided on the second partition, and the exhaust valve is installed at the exhaust port.

[0013] Furthermore, the bottom of the first partition has a horizontal bottom edge that bends towards the water collection tray. The bottom edge is fixedly connected to the water collection tray. The refrigerant pipe connected to the evaporator passes through the bottom edge and is connected to the compressor. A fan bracket is fixedly installed below the first partition. A condenser fan is fixedly installed on the fan bracket. The bottom of the fan bracket is fixed to the bottom plate of the housing.

[0014] Furthermore, a controller is installed below the air outlet on the front side panel of the housing. The controller is fixedly mounted on a mounting bracket, and the front and rear ends of the mounting bracket are respectively fixed to the front side panel and the first partition.

[0015] In summary, the integrated industrial air conditioning unit using flammable refrigerant provided by this utility model has the following advantages compared with the prior art:

[0016] (1) This utility model sets an exhaust valve between the indoor side air duct and the outdoor side air duct and installs an air supply valve at the air supply outlet. When the refrigerant detection device detects that there is flammable refrigerant in the air inside the casing, the controller immediately controls the air supply valve to close and the exhaust valve to open, so as to prevent the air containing flammable refrigerant from being sent to the indoor space. At the same time, the air containing flammable refrigerant is discharged from the indoor side air duct to the outdoor side air duct, and then further discharged to the outside through the air outlet, so as to prevent flammable refrigerant from entering the room and accumulating in the relatively closed indoor space and causing an explosion, thus ensuring the safety of the air conditioning unit.

[0017] (2) This utility model improves the safety of air conditioning unit use by making simple structural improvements. At the same time, the overall structure is compact and reasonable, the overall size is small, the space occupied is small, and the cost is low.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the attached diagram:

[0021] Figure 1 This is a diagram of the internal structure of the air conditioning unit of this utility model;

[0022] Figure 2 This is a three-dimensional view of the internal structure of the air conditioning unit of this utility model;

[0023] Figure 3 This utility model relates to the structure of the air conditioning unit housing. Figure 1 ;

[0024] Figure 4 This utility model relates to the structure of the air conditioning unit housing. Figure 2 .

[0025] In the picture:

[0026] 1. Housing, 1a front side panel, 1b rear side panel, 1c bottom plate, 2. Evaporator, 3. Blower, 4. Condenser, 5. Condenser fan, 6. Compressor, 7. Drain tray, 8. First partition, 81 bottom edge, 9. Indoor air duct, 10. Outdoor air duct, 11. Air outlet, 12. Air outlet, 13. Air inlet, 14. Air supply valve, 15. Air exhaust valve, 16. Second partition, 17. Controller, 18. Refrigerant pipe, 19. Fan bracket, 20. Mounting bracket, 21.

[0027] It should be noted that the accompanying drawings and text description are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] like Figures 1 to 4 As shown, this utility model provides an integrated industrial air conditioning unit using a flammable refrigerant, including a housing 1. An evaporator 2, a blower 3, a condenser 4, a condenser fan 5, a compressor 6, etc. are installed inside the housing 1. A water collection tray 7 is installed below the evaporator 2. The drain outlet of the water collection tray 7 is connected to a drain pipe (not shown in the figure). The drain pipe discharges the collected condensate to the outside.

[0032] An indoor air duct 9 and an outdoor air duct 10 are separated within the casing 1 by a first partition 8. The evaporator 2 and the blower 3 are installed in the indoor air duct 9, while the condenser 4 and the condenser fan 5 are installed in the outdoor air duct 10. The indoor air duct 9 connects to the indoor space via an air supply outlet 11 and a return air outlet 12, while the outdoor air duct 10 connects to the outdoor space via an air outlet 13 and an air inlet 14. Indoor air enters the indoor air duct 9 through the return air outlet 12 under the action of the blower 3, exchanges heat with the evaporator 2, and is then discharged from the air supply outlet 11, creating air circulation within the room and regulating the temperature and humidity. Simultaneously, outdoor air enters the outdoor air duct 10 through the air inlet 14 under the action of the condenser fan 5, exchanges heat with the condenser 4, and is then discharged from the air outlet 13.

[0033] In this embodiment, an air supply valve 15 is installed at the air supply outlet 11, and an exhaust valve 16 for selective communication with the outdoor air duct 10 is installed on the indoor air duct 9. A refrigerant detection device (not shown in the figure) is also installed inside the housing 1. This device uses a refrigerant sensor to detect the content of flammable refrigerant in the surrounding air. In this embodiment, the refrigerant detection device is further installed in the indoor air duct 9 to detect whether the air in the indoor air duct 9 contains flammable refrigerant, i.e., to detect whether a refrigerant leak has occurred at the connection point of the evaporator 2 pipe.

[0034] In this embodiment, the refrigerant detection device is connected to the controller 18 of the air conditioning unit. The refrigerant detection device transmits the detection results to the controller 18, which is configured to control the air supply valve 15 to close and the exhaust valve 16 to open in response to refrigerant leakage information. That is, when the refrigerant detection device detects flammable refrigerant in the air in the indoor air duct 9, it indicates that a refrigerant leak has occurred at the pipe connection point. At this time, the controller 18 controls the air supply valve 15 to close, disconnecting the passage between the space inside the housing 1 and the indoor space, preventing air containing flammable refrigerant from being sent to the indoor space through the air supply port 11. At this time, the air supply fan 3 can be further controlled to stop. At the same time, the exhaust valve 16 is controlled to open, and under the action of the condenser fan 5, the air containing flammable refrigerant can be exhausted from the indoor air duct 9 to the outdoor air duct 10, and then further discharged to the outside through the air inlet 14. This allows for timely handling in the event of a flammable refrigerant leak, ensuring that the flammable refrigerant is directly discharged to the outdoor environment through the exhaust valve 16 and the outdoor side duct 10. This prevents the flammable refrigerant from directly entering the room and accumulating in the relatively enclosed indoor space, which could lead to an explosion, thus ensuring the safety of the air conditioning unit.

[0035] In this embodiment, a threshold can be set to determine whether the refrigerant is leaking. The threshold is the concentration of the refrigerant. The threshold is stored in the controller 18 in advance. When the refrigerant detection sensor detects that the concentration of combustible refrigerant in the air reaches the threshold, it is determined that the refrigerant is leaking, and the actions of closing the air supply valve 15 and opening the exhaust valve 16 are executed.

[0036] In this embodiment, it is further preferred that the refrigerant detection sensor be installed in the indoor air duct 9 between the evaporator 2 and the air outlet 11. Thus, under the action of the fan 3, any leaks in the evaporator 2 piping will flow towards the refrigerant detection sensor, thereby ensuring the accuracy and reliability of the sensor's detection.

[0037] In this embodiment, it is further preferred that, in the indoor side air duct 9, the blower 3 is installed above the evaporator 2, and more preferably, two blowers 3 are installed to ensure the air supply volume. In the outdoor side air duct 10, the condenser fan 5 is installed below the condenser 4, and only one condenser fan 5 is installed. Both the evaporator 2 and the condenser 4 are flat plate structures, installed parallel to each other on the front and rear sides of the inner space of the shell 1, and connected to the front side plate 1a and the rear side plate 1b of the shell 1 through the tube plates on both sides, respectively. The first partition plate 8 is placed between the evaporator 2 and the condenser 4.

[0038] On the front panel 1a of the casing 1, an air supply outlet 11 and a return air outlet 12 are provided corresponding to the blower 3 and evaporator 2, respectively. The air supply outlet 11 is located above the return air outlet 12 and is a long, narrow outlet, corresponding to both blowers 3. On the opposite rear panel 1b, an air outlet 13 and an air inlet 14 are provided corresponding to the condenser 4 and condenser fan 5, respectively. The air outlet 13 is located above the air inlet 14. This design allows treated air to be delivered to the room from the upper air supply outlet 11, while the recirculated air flows back into the casing 1 from the lower return air outlet 12, which is beneficial for indoor air circulation and improves indoor heat exchange efficiency. It also makes the structure of the air conditioning unit more compact, reducing its size and thus the space it occupies.

[0039] In this embodiment, it is further preferred that the compressor 6 is also installed in the outdoor air duct 10, and the compressor 6 is installed on one side of the condenser fan 5, so that the structural layout of the components inside the housing 1 can be more compact.

[0040] In this embodiment, a horizontally placed second partition 17 is installed above the evaporator 2 and the condenser 4. The four sides of the second partition 17 are sealed and fixedly connected to the four side plates of the housing 1. The second partition 17 is used as a mounting bracket for the blowers 3. The two blowers 3 are fixedly installed above the second partition 17. Two ventilation openings (not shown in the figure) are opened on the second partition 17 corresponding to the air inlet side of the two blowers 3 to form the indoor side air duct 9.

[0041] In this embodiment, preferably, the top of the first partition 8 is fixedly connected to the second partition 17, the bottom of the first partition 8 is fixedly connected to the water tray 7 below the evaporator 2, and both sides of the first partition 8 are fixedly connected to the left and right side plates of the housing 1. The compressor 6 is installed below the water tray 7. The outdoor air duct 10 is separated by the horizontally placed second partition 17, the vertically installed first partition 8, and the horizontally placed water tray 7, and the remaining space is the indoor air duct 9. The compressor 6 is installed in the outdoor air duct 10 directly below the water tray 7. This structural layout simplifies the internal structure of the air conditioning unit, makes the spatial layout of the components inside the housing 1 more reasonable and compact, and also helps to reduce the thickness of the housing 1, reduce the volume of the air conditioning unit, and reduce the space occupied by the air conditioning unit.

[0042] In a further preferred embodiment, the first partition 8 has a structure with multiple bends in the height direction to facilitate fixed connection with various components and to separate the space required for the indoor air duct 9 and the outdoor air duct 10. The bottom of the first partition 8 has a horizontal bottom edge 81 that bends towards the water collection tray 7. The bottom edge 81 is fixedly connected to the water collection tray 7, and the other three sides of the water collection tray 7 are sealed to the three side plates of the housing 1. Thus, the area below the bottom edge 81 and the water collection tray 7 forms the outdoor air duct 10, and the area above forms the indoor air duct 9. The refrigerant pipe 19, connected to the evaporator 2, passes through the bottom edge 81 of the first partition 8 and connects to the compressor 6 below. A fan bracket 20 is also fixedly installed below the bottom edge 81, and the condenser fan 5 is fixedly installed on the fan bracket 20. The bottom of the fan bracket 20 is fixed to the bottom plate 1c of the housing 1.

[0043] The exhaust valve 16 can be installed at any position on the first partition 8, as long as it connects the indoor air duct 9 to the outdoor air duct 10. In this embodiment, it is more preferable to install the exhaust valve 16 on the second partition 17 located at the top of the outdoor air duct 10, connecting the indoor air duct 9 above the second partition 17 to the outdoor air duct 10 below. This simplifies the structure and facilitates the rapid exhaust of air from the indoor air duct 9 to the outside through the outdoor air duct 10 and the air inlet 14.

[0044] To ensure the efficiency of the exhaust valve 16 during exhaust, it is further preferred that a long strip-shaped exhaust port (not shown in the figure) extending in a direction parallel to the condenser 4 is provided on the second partition 17, and an exhaust valve 16 for controlling the opening and closing of the exhaust port is installed at the exhaust port. This increases the area of ​​the exhaust port and improves the exhaust efficiency.

[0045] In this embodiment, a controller 18 is installed below the air outlet 11 of the front side plate 1a of the housing. The control panel is placed on the front side plate 1a. The controller 18 is fixedly installed on the mounting bracket 21. The mounting bracket 21 is a frame structure, and its front and rear ends are fixed to the front side plate 1a and the first partition plate 8, respectively.

[0046] This invention, by installing an exhaust valve between the indoor and outdoor air ducts and an air supply valve at the air outlet, ensures that when the refrigerant detection device detects flammable refrigerant in the air inside the casing, the controller immediately closes the air supply valve and opens the exhaust valve. This prevents air containing flammable refrigerant from being sent into the indoor space. Simultaneously, the air containing flammable refrigerant is exhausted from the indoor air duct to the outdoor air duct, and then further discharged outdoors through the air outlet. This prevents flammable refrigerant from entering the room and accumulating in the relatively enclosed indoor space, which could lead to an explosion, thus ensuring the safety of the air conditioning unit.

[0047] This utility model significantly improves the safety of air conditioning units through simple structural improvements. At the same time, the overall structure is compact and reasonable, with a small overall size, small space occupation, and low cost.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An integrated industrial air conditioning unit using a flammable refrigerant, characterized in that: An indoor air duct and an outdoor air duct are separated within the housing by a first partition. The evaporator and blower are located in the indoor air duct, while the condenser and condenser blower are located in the outdoor air duct. The indoor air duct is connected to the indoor space through an air supply port and an air return port, and the outdoor air duct is connected to the outdoor space through an air inlet and an air outlet. An air supply valve is installed at the air supply port, and an exhaust valve for selectively connecting to the outdoor air duct is installed on the indoor air duct. A refrigerant detection device for detecting the content of flammable refrigerant is installed within the housing. The refrigerant detection device is connected to a controller, which is configured to control the air supply valve to close and the exhaust valve to open in response to refrigerant leakage information.

2. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 1, characterized in that: The refrigerant detection device is installed in the indoor side air duct.

3. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 2, characterized in that: The refrigerant detection device is installed in the indoor side air duct between the evaporator and the air outlet.

4. The integrated industrial air conditioning unit using a flammable refrigerant according to any one of claims 1-3, characterized in that: In the indoor air duct, the blower is installed above the evaporator; in the outdoor air duct, the condenser is installed below the condenser, and the compressor is installed to one side of the condenser.

5. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 4, characterized in that: The condenser and evaporator are installed in parallel on the front and rear sides of the internal space of the housing. The first partition is placed between the evaporator and the condenser. An air supply port and an air return port are provided on the front side plate of the housing corresponding to the air supply fan and the evaporator. An air inlet and an air outlet are provided on the rear side plate of the housing corresponding to the condenser and the condensing fan.

6. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 5, characterized in that: A horizontally placed second partition is installed above the evaporator and condenser. The blower is installed above the second partition. A vent is opened on the second partition corresponding to the air inlet side of the blower. The top of the first partition is fixedly connected to the second partition, and the bottom of the first partition is fixedly connected to the water collection tray below the evaporator. The compressor is installed below the water collection tray. The second partition, the first partition, and the water collection tray are used to separate the outdoor air duct and the indoor air duct.

7. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 6, characterized in that: The exhaust valve is installed on the second partition located on top of the outdoor air duct, connecting the indoor air duct above the second partition with the outdoor air duct.

8. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 7, characterized in that: An exhaust vent is provided on the second partition plate, extending in a direction parallel to the condenser, and an exhaust valve is installed at the exhaust vent.

9. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 6, characterized in that: The bottom of the first partition has a horizontal bottom edge that bends toward the water collection tray. The bottom edge is fixedly connected to the water collection tray. The refrigerant pipe connected to the evaporator passes through the bottom edge and is connected to the compressor. A fan bracket is fixedly installed below the first partition. A condenser fan is fixedly installed on the fan bracket. The bottom of the fan bracket is fixed to the bottom plate of the housing.

10. The integrated industrial air conditioning unit using a flammable refrigerant according to claim 5, characterized in that: A controller is installed below the air outlet on the front side panel of the housing. The controller is fixedly mounted on a mounting bracket, and the front and rear ends of the mounting bracket are respectively fixed to the front side panel and the first partition.

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