CN220287691U

CN220287691U - Direct expansion type air conditioning system

Info

Publication number: CN220287691U
Application number: CN202322362086.XU
Authority: CN
Inventors: 任洋; 杨亚华; 杨兵; 游永生
Original assignee: Guangzhou Tianjia Environmental Control Equipment Co ltd; Nanjing TICA Climate Solutions Co Ltd
Current assignee: Guangzhou Tianjia Environmental Control Equipment Co ltd; Nanjing TICA Climate Solutions Co Ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2024-01-02
Anticipated expiration: 2033-08-31

Abstract

The utility model belongs to the technical field of temperature regulating equipment and discloses a direct expansion air conditioning system which comprises an indoor unit, an outdoor unit and an air control pipeline, wherein the indoor unit comprises a machine body and an indoor heat exchanger, the outdoor unit is arranged outside a hall, the outdoor unit comprises a compressor and an outdoor heat exchanger, the compressor can be alternatively communicated with the indoor heat exchanger and the outdoor heat exchanger, the indoor heat exchanger is communicated with the outdoor heat exchanger, the air control pipeline comprises an exhaust pipe and a first air supply pipe, the exhaust pipe is communicated with a hall and the external environment, the exhaust pipe is provided with a first switch valve, one end of the first air supply pipe is communicated with the middle part of the exhaust pipe, the other end of the first air supply pipe faces the outdoor heat exchanger, and two ends of the second air supply pipe are respectively communicated with the first air supply pipe and the external environment.

Description

Direct expansion type air conditioning system

Technical Field

The utility model relates to the technical field of temperature regulating equipment, in particular to a direct expansion air conditioning system.

Background

The direct expansion air conditioning system is temperature treatment equipment for directly carrying out heat exchange with air to be treated by a heat exchange medium, and the heat exchange medium and the air can reliably and stably keep the temperature and moisture of a target hall without secondary heat exchange. The direct expansion air conditioning system comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises a fan, an indoor heat exchanger, a humidity adjusting component, a filtering component and the like, and can perform temperature treatment, humidity treatment, filtering purification and the like on indoor air; the outdoor unit includes a compressor, an outdoor heat exchanger, and the like, and is capable of supplying a heat exchange medium to the indoor heat exchanger.

Specifically, when the direct expansion air conditioner heats the room in winter, the indoor heat exchanger is equivalent to a condenser, the outdoor heat exchanger is equivalent to an evaporator, the compressor of the outdoor unit supplies high-temperature and high-pressure gaseous heat exchange medium to the indoor heat exchanger, the gaseous heat exchange medium condenses, liquefies and releases heat in the indoor heat exchanger to heat the air introduced into the indoor unit, and then the heat exchange medium enters the outdoor heat exchanger through a throttle valve and other parts, evaporates, absorbs heat of the outdoor air, and enables the heat exchange medium to become gaseous again to enter the compressor to start the next cycle. In winter, the air around the outdoor heat exchanger with lower outdoor temperature is easy to frost on the outdoor unit after absorbing heat, so the air conditioner can defrost the outdoor unit regularly. The defrosting process is basically consistent with the indoor refrigeration operation of the air conditioner, other heat exchange media with high temperature and high pressure generated by the compressor are introduced into the outdoor heat exchanger, the outdoor heat exchanger is equivalent to a condenser, the heat exchange media liquefy and release heat to defrost the outdoor unit, and the defrosting process is equivalent to the whole working mode of the changed air conditioner, so that the indoor heat exchanger is converted into an evaporator to absorb the air heat of the indoor unit, thereby causing the air temperature of the indoor unit to fluctuate and the temperature and humidity in the room to be kept constant.

Therefore, how to ensure defrosting of the outdoor unit without fluctuation of heating of the indoor unit air is an effort of those skilled in the art.

Disclosure of Invention

The utility model aims to provide a direct expansion air conditioning system which can effectively avoid frosting of an outdoor unit on the premise of not influencing the indoor heating temperature.

To achieve the purpose, the utility model adopts the following technical scheme:

a direct expansion air conditioning system, comprising:

the indoor unit comprises a machine body and an indoor heat exchanger arranged in the machine body, and the machine body is arranged in a hall room;

the outdoor unit is arranged outside the hall and comprises a compressor and an outdoor heat exchanger, the compressor can be alternatively communicated with the indoor heat exchanger and the outdoor heat exchanger, and the indoor heat exchanger is communicated with the outdoor heat exchanger;

the air control pipeline comprises an exhaust pipe and a first air supply pipe; wherein,

the two ends of the exhaust pipe are respectively communicated with the hall and the external environment, and a first switch valve is arranged at one end of the exhaust pipe, which is far away from the hall;

one end of the first air supply pipe is communicated with the middle of the exhaust pipe, the other end of the first air supply pipe faces the outdoor heat exchanger, and a second switch valve is arranged on the first air supply pipe.

Preferably, the air control pipeline further comprises a second air supply pipe, a first end of the second air supply pipe is communicated with the first air supply pipe, a second end of the second air supply pipe is communicated with an external warm air source, and a third switch valve is arranged on the second air supply pipe.

Preferably, the exhaust duct is provided with a first exhaust fan at one end close to the hall, and the first exhaust fan is used for exhausting air in the hall to the exhaust duct.

Preferably, a second exhaust fan is provided at an end of the exhaust pipe away from the hall, and the second exhaust fan is used for exhausting air in the exhaust pipe to the external environment.

Preferably, the exhaust duct is provided with a humidity sensor for detecting the humidity of the air entering the exhaust duct.

Preferably, a filter is provided on the first air supply duct, and the filter is used for filtering air flowing through the first air supply duct.

Preferably, the second air supply pipe is provided with a first air supply blower, and the first air supply blower is used for conveying air of an external warm air source into the second air supply pipe.

Preferably, one end of the first air supply pipe, which faces the outdoor heat exchanger, is communicated with a cladding piece, the cladding piece is provided with a cladding cavity, and the outdoor heat exchanger is clad in the cladding cavity.

Preferably, the outdoor unit further includes a throttle valve disposed on a communication line between the indoor heat exchanger and the outdoor heat exchanger.

Preferably, the outdoor unit further comprises a multi-way valve, wherein the multi-way valve comprises a first valve port, a second valve port and a third valve port, and the first valve port, the second valve port and the third valve port are respectively communicated with the compressor, the indoor heat exchanger and the outdoor heat exchanger.

The beneficial effects are that:

according to the direct expansion air conditioning system provided by the utility model, when defrosting of the outdoor unit is required in the process of heating air in the hall, the compressor does not need to interrupt the delivery of high-temperature and high-pressure gaseous heat exchange medium to the indoor heat exchanger, and the fluctuation of the heating of the hall temperature is avoided. In the defrosting process, the first switch valve is closed, gas in the hall chamber can not be discharged to the outside of the hall through the exhaust pipe, and the second switch valve is opened, so that the exhaust pipe is communicated with the first air supply pipe, warm air in the hall chamber can enter the first air supply pipe and be transported to one side of the outdoor heat exchanger along the first air supply pipe, heat of the warm air can be directly absorbed in the process that the heat exchange medium enters the outdoor heat exchanger, the temperature of the warm air is higher, and even if the temperature is reduced after the heat is absorbed, the temperature can not be reduced to below a freezing point, so that frosting of an outdoor unit can be effectively avoided.

Drawings

Fig. 1 is a schematic structural diagram of a direct expansion air conditioning system according to the present utility model.

In the figure:

1. an indoor unit; 11. a body; 12. an indoor heat exchanger; 13. a blower; 14. a filter assembly; 141. a first stage filter; 142. a secondary filter; 15. a humidity adjustment assembly; 161. a first differential pressure detecting member; 162. a second differential pressure detecting member;

2. an outdoor unit; 21. a compressor; 22. an outdoor heat exchanger; 23. a multi-way valve; 24. a gas-liquid separator; 25. a throttle valve; 26. a flow guiding assembly; 271. a first pressure sensor; 272. a second pressure sensor;

31. an exhaust pipe; 311. a first switching valve; 312. a first exhaust fan; 313. a second exhaust fan; 314. a humidity sensor; 32. a first air supply pipe; 321. a second switching valve; 322. a filter; 33. a second air supply pipe; 331. a third switching valve; 332. a first blower;

34. a cladding; 341. a cladding cavity;

4. hall room.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The utility model provides a direct expansion air conditioning system. Referring to fig. 1, the direct expansion air conditioning system includes an indoor unit 1, an outdoor unit 2, and an air control line, wherein the indoor unit 1 includes a housing 11 and an indoor heat exchanger 12 provided in the housing 11, the housing 11 being provided in a hall 4; outdoor unit 2 is disposed outside hall room 4 and includes compressor 21 and outdoor heat exchanger 22, compressor 21 can alternatively communicate with indoor heat exchanger 12 and outdoor heat exchanger 22, and indoor heat exchanger 12 communicates with outdoor heat exchanger 22; the air control pipeline comprises an exhaust pipe 31 and a first air supply pipe 32; wherein, two ends of the exhaust pipe 31 are respectively communicated with the hall 4 and the external environment, and one end of the exhaust pipe 31 far away from the hall 4 is provided with a first switch valve 311; one end of the first air supply pipe 32 is communicated with the middle part of the exhaust pipe 31, the other end of the first air supply pipe 32 is arranged towards the outdoor heat exchanger 22, and the first air supply pipe 32 is provided with a second switch valve 321.

In the present embodiment, when defrosting of the outdoor unit 2 is required during heating of the air in the hall room 4, the compressor 21 does not need to interrupt the supply of the high-temperature and high-pressure gaseous heat exchange medium to the indoor heat exchanger 12, and the temperature heating of the hall room 4 does not fluctuate. In the defrosting process, the first switch valve 311 is closed, so that the air in the hall room 4 is not discharged out of the hall room 4 through the exhaust pipe 31, and the second switch valve 321 is opened, so that the exhaust pipe 31 is communicated with the first air supply pipe 32, warm air in the hall room 4 can enter the first air supply pipe 32 and is transported to one side of the outdoor heat exchanger 22 along the first air supply pipe 32, the heat of the warm air can be directly absorbed in the process of entering the outdoor heat exchanger 22 through a heat exchange medium, the temperature of the warm air is higher, and even if the temperature is reduced after the heat is absorbed, the temperature is not reduced below the freezing point, thereby effectively avoiding frosting of the outdoor unit 2.

Further, the air control pipeline further comprises a second air supply pipe 33, a first end of the second air supply pipe 33 is communicated with the first air supply pipe 32, a second end of the second air supply pipe is communicated with an external warm air source, and a third switch valve 331 is arranged on the second air supply pipe 33. Specifically, when the amount of warm air required for defrosting the outdoor unit 2 is more than the amount of warm air discharged to the first air supply duct 32 through only the inside of the hall 4, the third switching valve 331 may be opened at this time, and warm air is supplied into the second air supply duct 33 through the external warm air source and is introduced into the first air supply duct 32, and the heat is absorbed by the outdoor heat exchanger 22 together with the warm air supplied from the hall 4, thereby ensuring a sufficient supply of warm air.

It should be noted that, when the direct expansion air conditioning system of the present embodiment performs the conventional refrigeration, the air control pipeline is not operated at this time, and both the second switch valve 321 and the third switch valve 331 may be closed.

In this embodiment, the first switch valve 311, the second switch valve 321 and the third switch valve 331 are all electromagnetic proportional valves, so that the opening of the valve port can be adaptively adjusted, and the ventilation of the corresponding pipeline can be adjusted.

Specifically, the exhaust duct 31 is provided at one end near the hall 4 with a first exhaust fan 312, and the first exhaust fan 312 is used to exhaust the air in the hall 4 into the exhaust duct 31. The exhaust duct 31 is provided at one end remote from the hall 4 with a second exhaust fan 313, and the second exhaust fan 313 is used to exhaust the air in the exhaust duct 31 to the outside environment. The second air supply duct 33 is provided with a first blower 332, and the first blower 332 is configured to convey air from an external warm air source into the second air supply duct 33.

Specifically, the exhaust duct 31 is provided with a humidity sensor 314, and the humidity sensor 314 is configured to detect the humidity of air entering the exhaust duct 31, and detect the humidity of air in the exhaust duct in real time.

Specifically, the first air supply duct 32 is provided with a filter 322, and the filter 322 is used for filtering air flowing through the first air supply duct 32. By providing the filter 322, other impurities of warm air delivered to the outdoor heat exchanger 22 can be reduced.

In the present embodiment, one end of the first air pipe 32 facing the outdoor heat exchanger 22 is connected to a coating member 34, the coating member 34 is provided with a coating cavity 341, and the outdoor heat exchanger 22 is coated in the coating cavity 341. By providing the wrapping 34, warm air delivered through the first air delivery duct 32 can be finally introduced into the wrapping chamber 341 so as to be sufficiently heat-exchanged with the outdoor heat exchanger 22, and the wrapping 34 can further separate the outdoor heat exchanger 22 from the low-temperature air around the outdoor unit 2.

In this embodiment, the indoor unit 1 further includes a fan 13, a filter assembly 14 and a humidity adjusting assembly 15, wherein the fan 13 is disposed in the machine body 11 and is used for sucking air in the hall room 4 into the machine body 11 and discharging air after exchanging heat via the indoor heat exchanger 12 to the hall room 4, the filter assembly 14 is disposed in the machine body 11 and is used for filtering air in the machine body 11, and the humidity adjusting assembly 15 is disposed in the machine body 11 and is used for adjusting humidity of air in the machine body 11.

Specifically, the filter assembly 14 includes a primary filter 141 and a secondary filter 142, and the primary filter 141 and the secondary filter 142 are disposed at intervals along a transportation direction of air in the machine body 11, so that two-stage filtration can be performed on the air in the machine body 11, and the clean exhaust air is ensured.

More specifically, the primary filter member 141 is further provided with a first differential pressure detecting member 161 on one side, and the secondary filter member 142 is further provided with a second differential pressure detecting member 162 on one side. The first and second differential pressure detecting members 161 and 162 are capable of detecting differential pressures of both sides of the primary filter member 141 and both sides of the secondary filter member 142, respectively. Taking the primary filter 141 as an example, when the first differential pressure detecting member 161 detects that the differential pressure between two sides of the primary filter 141 exceeds the threshold value, it is indicated that excessive impurities are attached to the primary filter 141 to affect the air flow, and at this time, the filter screen of the primary filter 141 needs to be cleaned in time.

In the present embodiment, the outdoor unit 2 further includes a throttle valve 25, and the throttle valve 25 is disposed on a communication line between the indoor heat exchanger 12 and the outdoor heat exchanger 22. By providing the throttle valve 25, the heat exchange medium before entering the outdoor heat exchanger 22 can be depressurized, and the temperature of the part of the heat exchange medium can be further reduced.

In this embodiment, the outdoor unit 2 further includes a flow guiding assembly 26, where the flow guiding assembly 26 is disposed on one side of the outdoor heat exchanger 22, and is used for accelerating the air flow around the outdoor heat exchanger 22, so as to further ensure the heat exchange effect. The deflector assembly 26 may be provided as a fan.

In this embodiment, the outdoor unit 2 further includes a multi-way valve 23, and the multi-way valve 23 includes a first valve port, a second valve port, and a third valve port, which are respectively connected to the compressor 21, the indoor heat exchanger 12, and the outdoor heat exchanger 22. Specifically, when the air conditioner is in a heating working condition, the first valve port and the second valve port of the multi-way valve 23 are communicated, and the high-temperature and high-pressure heat exchange medium generated by the compressor 21 can be directly introduced into the indoor heat exchanger 12; when the air conditioner is in a refrigerating condition, the first valve port of the multi-way valve 23 is communicated with the third valve port, and the high-temperature and high-pressure heat exchange medium generated by the compressor 21 can be directly introduced into the outdoor heat exchanger 22.

Further, the outdoor unit 2 further includes a gas-liquid separator 24, and the multi-way valve 23 further includes a fourth valve port connected to the gas-liquid separator 24. Specifically, the gas-liquid separator 24 can selectively communicate with the indoor heat exchanger 12 or the outdoor heat exchanger 22 through the multi-way valve 23, thereby enabling collection of the partially circulated heat exchange medium.

Specifically, the gas-liquid separator 24 communicates with the compressor 21, and is capable of supplying the heat exchange medium to the compressor 21. A first pressure sensor 271 is provided in the communication line between the compressor 21 and the multi-way valve 23, and detects the pressure in the communication line between the compressor 21 and the multi-way valve 23. A second pressure sensor 272 is provided on the communication line between the gas-liquid separator 24 and the compressor 21, for detecting the pressure of the communication line between the gas-liquid separator 24 and the compressor 21.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A direct expansion air conditioning system, comprising:

the indoor unit (1) comprises a machine body (11) and an indoor heat exchanger (12) arranged in the machine body (11), wherein the machine body (11) is arranged in the hall (4);

the outdoor unit (2) is arranged outside the hall room (4) and comprises a compressor (21) and an outdoor heat exchanger (22), the compressor (21) can be alternatively communicated with the indoor heat exchanger (12) and the outdoor heat exchanger (22), and the indoor heat exchanger (12) is communicated with the outdoor heat exchanger (22);

the air control pipeline comprises an exhaust pipe (31) and a first air supply pipe (32); wherein,

two ends of the exhaust pipe (31) are respectively communicated with the hall (4) and the external environment, and a first switch valve (311) is arranged at one end of the exhaust pipe (31) far away from the hall (4);

one end of the first air supply pipe (32) is communicated with the middle part of the exhaust pipe (31), the other end of the first air supply pipe is arranged towards the outdoor heat exchanger (22), and a second switch valve (321) is arranged on the first air supply pipe (32).

2. The direct expansion air conditioning system according to claim 1, characterized in that the air control pipeline further comprises a second air supply pipe (33), a first end of the second air supply pipe (33) is communicated with the first air supply pipe (32), a second end of the second air supply pipe (33) is communicated with an external warm air source, and a third switch valve (331) is arranged on the second air supply pipe (33).

3. The direct expansion air conditioning system according to claim 1, characterized in that the exhaust duct (31) is provided with a first exhaust fan (312) at one end close to the hall (4), and the first exhaust fan (312) is used for exhausting air in the hall (4) into the exhaust duct (31).

4. The direct expansion air conditioning system according to claim 1, characterized in that the end of the exhaust duct (31) remote from the hall room (4) is provided with a second exhaust fan (313), the second exhaust fan (313) being used for exhausting the air in the exhaust duct (31) to the external environment.

5. The direct expansion air conditioning system according to claim 1, characterized in that a humidity sensor (314) is provided on the exhaust duct (31), and the humidity sensor (314) is configured to detect the humidity of the air entering the exhaust duct (31).

6. The direct expansion air conditioning system according to claim 1, characterized in that a filter (322) is arranged on the first air supply duct (32), the filter (322) being adapted to filter air flowing through the first air supply duct (32).

7. The direct expansion air conditioning system according to claim 2, characterized in that a first blower (332) is provided on the second blower pipe (33), and the first blower (332) is used for conveying air of an external warm air source into the second blower pipe (33).

8. The direct expansion air conditioning system according to claim 1, characterized in that one end of the first air supply pipe (32) facing the outdoor heat exchanger (22) is communicated with a cladding member (34), the cladding member (34) is provided with a cladding cavity (341), and the outdoor heat exchanger (22) is clad in the cladding cavity (341).

9. The direct expansion air conditioning system according to claim 1, wherein the outdoor unit (2) further includes a throttle valve (25), the throttle valve (25) being disposed on a communication pipe between the indoor heat exchanger (12) and the outdoor heat exchanger (22).

10. The direct expansion air conditioning system according to claim 1, wherein the outdoor unit (2) further includes a multi-way valve (23), the multi-way valve (23) including a first valve port, a second valve port, and a third valve port, the first valve port, the second valve port, and the third valve port being in communication with the compressor (21), the indoor heat exchanger (12), and the outdoor heat exchanger (22), respectively.