Split type efficient floor heating air conditioner

Abstract

The utility model discloses a split type efficient floor heating air conditioner which comprises an indoor unit and an outdoor unit. The indoor unit comprises an inverter compressor, a water side plate heat exchanger, a liquid reservoir and a gas-liquid separator, the inverter compressor is connected with the water side plate heat exchanger, and the water side plate heat exchanger is connected with the liquid reservoir; the outdoor unit comprises a fin type heat exchanger and an EC direct-current fan, the fin type heat exchanger is connected with the liquid reservoir, the EC direct-current fan is connected with the fin type heat exchanger, the fin type heat exchanger is connected with the gas-liquid separator, and the gas-liquid separator is connected with the inverter compressor. The indoor and outdoor intensive split framework design is adopted, safety and maintainability breakthrough is achieved through core assembly layout optimization, the core assemblies are integrated in the indoor unit in an intensive mode, the possibility of aloft work for later maintenance of equipment is reduced, and convenience and safety of maintenance are improved; meanwhile, the requirement for high-altitude hoisting is eliminated, and the bearing requirement of the outer wall of a high-rise building is met.

Description

Technical Field

[0001] This utility model relates to the field of air source heat pump technology, specifically to a split-type high-efficiency underfloor heating air conditioner. Background Technology

[0002] Variable frequency underfloor heating air conditioners are a high-efficiency heating and cooling system that combines air source heat pump technology with variable frequency control. They provide underfloor heating in winter and air conditioning in summer, representing an innovative application of multi-split air source heat pumps. Existing variable frequency underfloor heating air conditioners typically employ a split-type architecture, consisting of indoor terminal units, outdoor power units, and connecting pipes. The outdoor unit integrates three core modules: a variable frequency compressor system (including a variable frequency drive module), an EC DC variable frequency axial flow fan unit, and a high-efficiency finned tube air heat exchanger. The indoor unit only features a hydraulic variable frequency unit and a water-side plate heat exchanger, with energy transfer achieved through refrigerant connecting pipes. However, in high-rise building applications, outdoor units are generally installed using wall-mounted installation. High-rise buildings often lack dedicated maintenance access, and high-rise suspended platform operations pose certain construction safety hazards, creating difficulties and dangers for equipment maintenance. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of the existing technology by providing a split-type high-efficiency underfloor heating air conditioner to solve the problems mentioned in the background art.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A split-type high-efficiency underfloor heating air conditioner includes an indoor unit and an outdoor unit;

[0006] The indoor unit includes a variable frequency compressor, a water-side plate heat exchanger, a liquid receiver, and a gas-liquid separator. The variable frequency compressor is connected to the water-side plate heat exchanger and is used to input high-temperature and high-pressure gaseous refrigerant into the water-side plate heat exchanger for heat exchange. The water-side plate heat exchanger is connected to the liquid receiver and is used to store the refrigerant that has changed from gas to liquid after releasing heat.

[0007] The outdoor unit includes a finned heat exchanger and an EC DC fan. The finned heat exchanger is connected to the liquid receiver, and the EC DC fan is connected to the finned heat exchanger to drive outdoor air to provide heat to the refrigerant, thereby turning the low-temperature, low-pressure liquid refrigerant into a gaseous refrigerant. The finned heat exchanger is connected to the gas-liquid separator, and the gas-liquid separator is connected to the variable frequency compressor to compress the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant.

[0008] As a preferred embodiment of a split-type high-efficiency underfloor heating air conditioner, the indoor unit also includes a variable frequency water pump, which is connected to the water-side plate heat exchanger and is used to drive the water medium in the water-side plate heat exchanger to exchange heat with the high-temperature and high-pressure gaseous refrigerant; the water-side plate heat exchanger is also connected to terminal equipment to provide heating for the room where the terminal equipment is located.

[0009] As a preferred embodiment of a split-type high-efficiency underfloor heating air conditioner, the indoor unit also includes an economizer and a main circuit electronic expansion valve disposed between the liquid receiver and the finned heat exchanger. The first port of the economizer is connected to the liquid receiver, and the second port is connected to the main circuit electronic expansion valve. The main circuit electronic expansion valve is connected to the finned heat exchanger and is used to throttle and reduce the pressure of the low-temperature and high-pressure liquid refrigerant.

[0010] As a preferred embodiment of a split-type high-efficiency underfloor heating air conditioner, the indoor unit also includes an auxiliary electronic expansion valve. The second port of the economizer is also connected to the auxiliary electronic expansion valve, and the other end of the auxiliary electronic expansion valve is connected to the third port of the economizer. A portion of the low-temperature, high-pressure liquid refrigerant in the economizer is diverted to the auxiliary electronic expansion valve for throttling and pressure reduction, and then returns to the economizer to absorb heat and become gaseous refrigerant. The fourth port of the economizer is connected to the inverter compressor, and the gaseous refrigerant returns to the inverter compressor for gas replenishment.

[0011] As a preferred embodiment of a split-type high-efficiency underfloor heating air conditioner, the indoor unit further includes a four-way reversing valve for connecting the various components. The first port of the four-way reversing valve is connected to the variable frequency compressor, and the second port is connected to the water-side plate heat exchanger to connect the variable frequency compressor and the water-side plate heat exchanger. The third port of the four-way reversing valve is connected to the finned heat exchanger, and the fourth port is connected to the gas-liquid separator to connect the finned heat exchanger and the gas-liquid separator.

[0012] As a preferred embodiment of a split-type high-efficiency underfloor heating air conditioner, a first shut-off valve is provided between the main electronic expansion valve and the finned heat exchanger, and a second shut-off valve is provided between the finned heat exchanger and the third port of the four-way reversing valve.

[0013] As a preferred solution for a split-type high-efficiency underfloor heating air conditioner, the indoor unit also includes a variable frequency control system, which is used to control the variable frequency compressor, the main electronic expansion valve, the auxiliary electronic expansion valve, the variable frequency water pump, the EC DC fan, the first shut-off valve, and the second shut-off valve.

[0014] The beneficial effects of this utility model are:

[0015] This utility model of a high-efficiency underfloor heating air conditioner adopts an indoor-outdoor integrated split architecture design. Through the optimization of the core component layout, it achieves breakthroughs in safety and maintainability. The core components, such as the variable frequency compressor, variable frequency control system, water-side plate heat exchanger, and variable frequency water pump, are integrated into the indoor unit, while the outdoor unit only retains components such as finned heat exchanger and EC DC fan for a streamlined configuration. This reduces the possibility of high-altitude operations for later maintenance and improves the convenience and safety of maintenance. At the same time, this design concentrates more than 85% of the heavy components in the indoor unit, eliminating the need for high-altitude hoisting and adapting to the load-bearing requirements of the exterior walls of high-rise buildings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly described below. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the split-type high-efficiency underfloor heating air conditioner described in this utility model.

[0018] In the picture:

[0019] 1. Indoor unit; 11. Variable frequency compressor; 12. Water-side plate heat exchanger; 13. Liquid receiver; 14. Gas-liquid separator; 15. Variable frequency water pump; 16. Economizer; 17. Main circuit electronic expansion valve; 18. Auxiliary circuit electronic expansion valve; 19. Four-way reversing valve; 110. First shut-off valve; 111. Variable frequency control system; 2. Outdoor unit; 21. Finned heat exchanger; 22. EC DC fan; 23. Second shut-off valve. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0022] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0023] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] like Figure 1 As shown, this utility model provides a split-type high-efficiency underfloor heating air conditioner, including an indoor unit 1 and an outdoor unit 2;

[0025] The indoor unit 1 includes a variable frequency compressor 11, a water-side plate heat exchanger 12, a liquid receiver 13, a gas-liquid separator 14, a variable frequency water pump 15, and a variable frequency control system 111. The variable frequency compressor 11 is connected to the water-side plate heat exchanger 12. After the variable frequency control system 111 starts the variable frequency compressor 11, the variable frequency compressor 11 will discharge high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant will enter the water-side plate heat exchanger 12 through a four-way reversing valve 19. The water-side plate heat exchanger 12 is connected to the variable frequency water pump 15. The variable frequency control system 111 will control the variable frequency water pump 15 to push the water medium in the water-side plate heat exchanger 12 against the high-temperature and high-pressure gaseous refrigerant. The gaseous refrigerant exchanges heat with the water medium in the water-side plate heat exchanger 12 to increase the temperature of the water medium inside the water-side plate heat exchanger 12. At the same time, the water-side plate heat exchanger 12 is connected to terminal equipment, which is installed in the indoor room. After the temperature of the water medium in the water-side plate heat exchanger 12 is increased, it will exchange heat with the terminal equipment, thereby increasing the temperature of the indoor room for heating. After the gaseous refrigerant exchanges heat with the terminal equipment, it will change from gas to liquid. The water-side plate heat exchanger 12 is connected to a liquid receiver 13, in which the liquid refrigerant will be stored. The liquid receiver 13 can balance the circulation of refrigerant to ensure the safe operation of the variable frequency compressor 11, thereby optimizing the thermal performance of the underfloor heating air conditioner under different operating conditions.

[0026] The indoor unit 1 also includes an economizer 16 and a main circuit electronic expansion valve 17. The liquid receiver 13 is connected to the first port of the economizer 16, and the second port of the economizer 16 is connected to the main circuit electronic expansion valve 17. The economizer 16 can play the role of secondary throttling of refrigerant and intermediate gas injection, so as to break through the performance bottleneck of traditional single-stage compression cycle. After the liquid refrigerant in the liquid receiver 13 comes out of the economizer 16, most of the low temperature and high pressure liquid refrigerant will pass through the main circuit electronic expansion valve 17. The frequency converter control system 111 controls the main circuit electronic expansion valve 17 to throttle and reduce the pressure of the liquid refrigerant, thereby becoming a low temperature and low pressure liquid refrigerant.

[0027] Outdoor unit 2 includes a finned heat exchanger 21 and an EC DC fan 22. The finned heat exchanger 21 is connected to the main circuit electronic expansion valve 17. After throttling and depressurization, the liquid refrigerant will enter the finned heat exchanger 21. The finned heat exchanger 21 is connected to the EC DC fan 22. After the frequency converter control system 111 controls the EC DC fan 22 to start, the EC DC fan 22 will push the outdoor air to exchange heat with the low-temperature and low-pressure liquid refrigerant. After absorbing heat from the air, the liquid refrigerant will become a low-temperature and low-pressure gaseous refrigerant. The finned heat exchanger 21 is connected to the gas-liquid separator 14 through a four-way reversing valve 19. The low-temperature and low-pressure gaseous refrigerant returns to the gas-liquid separator 14 through the four-way reversing valve 19. The gas-liquid separator 14 is connected to the frequency converter compressor 11. The low-temperature and low-pressure gaseous refrigerant coming out of the gas-liquid separator 14 will be compressed in the frequency converter compressor 11, thus becoming a high-temperature and high-pressure gaseous refrigerant again.

[0028] Preferably, the indoor unit 1 also includes an auxiliary electronic expansion valve 18. The second port of the economizer 16 is also connected to the auxiliary electronic expansion valve 18, and the other end of the auxiliary electronic expansion valve 18 is connected to the third port of the economizer 16. After the liquid refrigerant from the receiver 13 exits through the economizer 16, some of the low-temperature and high-pressure liquid refrigerant will be diverted to the auxiliary electronic expansion valve 18. The variable frequency control system 111 will control the auxiliary electronic expansion valve 18 to throttle and reduce the pressure of the liquid refrigerant. The throttled and depressurized liquid refrigerant will return to the economizer 16 to absorb heat and become gaseous refrigerant. Since the fourth port of the economizer 16 is connected to the variable frequency compressor 11, the gaseous refrigerant will return to the variable frequency compressor 11 to increase the gaseous refrigerant flow of the variable frequency compressor 11, thereby achieving the purpose of improving heating capacity and energy efficiency.

[0029] Preferably, in this embodiment, a first shut-off valve 110 is also provided between the main electronic expansion valve 17 and the finned heat exchanger 21. The frequency conversion control system 111 can control the refrigerant through the first shut-off valve 110. When the first shut-off valve 110 is open, the low-temperature and low-pressure liquid refrigerant is allowed to flow through the finned heat exchanger 21 to absorb air heat. A second shut-off valve 23 is provided between the finned heat exchanger 21 and the third port of the four-way reversing valve 19. The frequency conversion control system 111 can also control the refrigerant through the second shut-off valve 23. When the second shut-off valve 23 is open, the low-temperature and low-pressure gaseous refrigerant is allowed to enter the gas-liquid separator 14.

[0030] This utility model of a high-efficiency underfloor heating air conditioner adopts an indoor-outdoor integrated split architecture design. Through the optimization of the core component layout, it achieves breakthroughs in safety and maintainability. The core components, such as the variable frequency compressor 11, variable frequency control system 111, water-side plate heat exchanger 12, and variable frequency water pump 15, are integrated into the indoor unit 1. The outdoor unit 2 retains only the finned heat exchanger 21 and EC DC fan 22, which are simplified and reduce the possibility of high-altitude operations for later maintenance, thus improving the convenience and safety of maintenance. At the same time, this design concentrates more than 85% of the heavy components in the indoor unit 1, eliminating the need for high-altitude hoisting and adapting to the load-bearing requirements of the exterior walls of high-rise buildings.

[0031] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A split type high efficiency radiant air conditioner, characterized in that, Includes indoor unit (1) and outdoor unit (2); The indoor unit (1) includes a variable frequency compressor (11), a water-side plate heat exchanger (12), a liquid receiver (13), and a gas-liquid separator (14). The variable frequency compressor (11) is connected to the water-side plate heat exchanger (12) and is used to input high-temperature and high-pressure gaseous refrigerant into the water-side plate heat exchanger (12) for heat exchange. The water-side plate heat exchanger (12) is connected to the liquid receiver (13) and is used to store the refrigerant that has been converted from gas to liquid after releasing heat. The outdoor unit (2) includes a finned heat exchanger (21) and an EC DC fan (22). The finned heat exchanger (21) is connected to the liquid receiver (13), and the EC DC fan (22) is connected to the finned heat exchanger (21) to drive outdoor air to provide heat to the refrigerant, so that the low-temperature and low-pressure liquid refrigerant becomes a gaseous refrigerant. The finned heat exchanger (21) is connected to the gas-liquid separator (14), and the gas-liquid separator (14) is connected to the variable frequency compressor (11) to compress the low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant.

2. The split type high efficiency floor heating and air conditioning machine according to claim 1, wherein The indoor unit (1) also includes a variable frequency water pump (15), which is connected to the water-side plate heat exchanger (12) and is used to drive the water medium in the water-side plate heat exchanger (12) to exchange heat with the high temperature and high pressure gas refrigerant; the water-side plate heat exchanger (12) is also connected to a terminal device to provide heating for the room where the terminal device is located.

3. The split type high efficiency floor heating and air conditioning machine according to claim 2, wherein The indoor unit (1) also includes an economizer (16) and a main circuit electronic expansion valve (17) disposed between the liquid receiver (13) and the finned heat exchanger (21). The first port of the economizer (16) is connected to the liquid receiver (13), and the second port is connected to the main circuit electronic expansion valve (17). The main circuit electronic expansion valve (17) is connected to the finned heat exchanger (21) and is used to throttle and reduce the pressure of the low-temperature and high-pressure liquid refrigerant.

4. The split type high efficiency floor heating and air conditioning machine according to claim 3, wherein The indoor unit (1) also includes an auxiliary electronic expansion valve (18). The second port of the economizer (16) is also connected to the auxiliary electronic expansion valve (18). The other end of the auxiliary electronic expansion valve (18) is connected to the third port of the economizer (16). A portion of the low-temperature high-pressure liquid refrigerant in the economizer (16) is diverted to the auxiliary electronic expansion valve (18) for throttling and pressure reduction, and then returns to the economizer (16) to absorb heat and become gaseous refrigerant. The fourth port of the economizer (16) is connected to the variable frequency compressor (11), and the gaseous refrigerant will return to the variable frequency compressor (11) for gas replenishment.

5. The split type high efficiency floor heating and air conditioning machine according to claim 4, wherein The indoor unit (1) also includes a four-way reversing valve (19) for connecting the components. The first port of the four-way reversing valve (19) is connected to the variable frequency compressor (11), and the second port is connected to the water-side plate heat exchanger (12) to connect the variable frequency compressor (11) and the water-side plate heat exchanger (12). The third port of the four-way reversing valve (19) is connected to the finned heat exchanger (21), and the fourth port is connected to the gas-liquid separator (14) to connect the finned heat exchanger (21) and the gas-liquid separator (14).

6. The split-type high-efficiency floor heating and air conditioning machine according to claim 5, wherein A first shut-off valve (110) is provided between the main electronic expansion valve (17) and the finned heat exchanger (21), and a second shut-off valve (23) is provided between the finned heat exchanger (21) and the third port of the four-way reversing valve (19).

7. The split type high efficiency floor heating and air conditioning machine, as recited in claim 6, wherein, The indoor unit (1) also includes a variable frequency control system (111), which is used to control the variable frequency compressor (11), the main electronic expansion valve (17), the auxiliary electronic expansion valve (18), the variable frequency water pump (15), the EC DC fan (22), the first shut-off valve (110) and the second shut-off valve (23).

Images