CN220287825U - Refrigerant system and air conditioner - Google Patents

Abstract

The utility model discloses a refrigerant system and an air conditioner, wherein the refrigerant system comprises: the refrigerant system includes refrigerant circulation pipeline and locates the compressor in the refrigerant circulation pipeline, its characterized in that, refrigerant system still includes: the pressure relief pipe is provided with a first end and a second end, the first end is communicated with a refrigerant circulating pipeline at the exhaust end of the compressor, and the second end is communicated with a refrigerant circulating pipeline at the air inlet end of the compressor; the pressure relief valve is arranged on the pressure relief pipe and used for controlling the on-off of the pressure relief pipe. According to the refrigerant system disclosed by the utility model, after the refrigerant system is stopped, high-pressure refrigerant in the refrigerant circulation pipeline at the exhaust end of the compressor flows into the refrigerant circulation pipeline at the air inlet end of the compressor through the pressure relief valve, so that the pressure difference between the refrigerant at the exhaust end of the compressor and the refrigerant at the air inlet end is reduced, and the condition of overload protection during the next starting of the compressor is prevented.

Description

Refrigerant system and air conditioner

Technical Field

The utility model relates to the technical field of household appliances, in particular to a refrigerant system and an air conditioner.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

In the existing air conditioning equipment, a throttling element is required to be arranged to reduce the pressure of high-pressure refrigerant liquid from a condenser into low-pressure low-temperature refrigerant, and the low-pressure low-temperature refrigerant liquid enters an evaporator to evaporate and absorb heat. In some refrigerant systems of air conditioning equipment, a thermal expansion valve is used as a throttling component, and after the thermal expansion valve is stopped, a refrigerant flow path is blocked, so that a refrigerant at a high pressure side cannot flow to a low pressure side through the thermal expansion valve, the pressure difference between a pipeline at an exhaust end and a pipeline at a suction side of a compressor is high, and when the compressor is started again, the pressure difference at the suction side and the exhaust side of the compressor is possibly too high, so that the overload protection of the compressor is caused.

Disclosure of Invention

The utility model aims to at least solve the problem of overload protection of the compressor caused by too high pressure difference on the two sides of the suction and exhaust of the compressor. The aim is achieved by the following technical scheme:

the first aspect of the present utility model provides a refrigerant system, the refrigerant system includes a refrigerant circulation pipeline, and a compressor, a first heat exchanger and a second heat exchanger connected in series in the refrigerant circulation pipeline, the refrigerant system further includes: the pressure relief pipe is provided with a first end and a second end, the first end is communicated with the refrigerant circulation pipeline where the exhaust end of the compressor is located, and the second end is communicated with the refrigerant circulation pipeline where the air inlet end of the compressor is located; the pressure relief valve is arranged on the pressure relief pipe and used for controlling the on-off of the pressure relief pipe.

According to the refrigerant system disclosed by the utility model, the pressure relief pipe is arranged between the exhaust end and the air inlet end of the compressor, and after the compressor is stopped, the pressure relief valve is controlled to be opened, so that high-pressure refrigerant in the refrigerant circulation pipeline of the exhaust end of the compressor flows into the refrigerant circulation pipeline of the air inlet end of the compressor through the pressure relief valve, and the pressure difference between the refrigerant at the exhaust end of the compressor and the refrigerant at the air inlet end of the compressor is reduced, so that the condition of overload protection of the compressor in the next starting is reduced.

In addition, the refrigerant system according to the present utility model may further have the following additional technical features:

in some embodiments of the utility model, the first heat exchanger is a condenser and the second heat exchanger is an evaporator, the first end being connected to the refrigerant circulation line between the discharge end of the compressor and the intake end of the condenser.

In some embodiments of the utility model, the second end is connected to the refrigerant circulation line between the inlet end of the compressor and the outlet end of the evaporator.

In some embodiments of the present utility model, the refrigerant system further comprises a four-way valve disposed in the refrigerant circulation line, the first end being connected in communication with the refrigerant circulation line between the discharge end of the compressor and the inlet of the four-way valve, and the second end being connected in communication with the refrigerant circulation line between the intake end of the compressor and the outlet of the four-way valve.

In some embodiments of the present utility model, the refrigerant system further includes a first check valve disposed in the refrigerant circulation line, the first check valve being disposed adjacent to the first end and on a downstream side of the first end, the first check valve being configured to allow the refrigerant to flow from the compressor toward the first heat exchanger.

In some embodiments of the present utility model, the refrigerant system further includes a refrigerant filling pipe, and the refrigerant circulation pipe between the first check valve and the compressor is connected to a liquid outlet end of the refrigerant filling pipe. .

In some embodiments of the present utility model, the refrigerant system further includes a second check valve provided to the refrigerant charge pipe, the second check valve configured to allow the refrigerant to flow from the refrigerant charge pipe toward the refrigerant circulation line.

In some embodiments of the utility model, the refrigerant system further comprises a high pressure shut-off valve disposed in the refrigerant circulation line between the discharge end of the condenser and the intake end of the evaporator.

In some embodiments of the utility model, the refrigerant system further comprises a low pressure shut-off valve disposed in the refrigerant circulation line between the discharge end and the second end of the evaporator.

According to a second aspect of the present utility model, there is also provided an air conditioner, which includes the refrigerant system in any one of the first aspect.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 schematically illustrates a schematic structural view of a refrigerant system according to some embodiments of the present utility model;

FIG. 2 schematically illustrates a schematic structural view of a refrigerant system according to some embodiments of the present utility model;

FIG. 3 schematically illustrates a schematic structural view of a refrigerant system according to some embodiments of the present utility model;

FIG. 4 schematically illustrates a schematic structural view of a refrigerant system according to some embodiments of the present utility model;

fig. 5 schematically illustrates a schematic structural view of a refrigerant system according to some embodiments of the present utility model.

The reference numerals are as follows:

100. a refrigerant system; 10. a refrigerant circulation line; 20. a compressor; 30. a first heat exchanger; 40. a second heat exchanger; 50. a pressure relief tube; 51. a first end; 52. a second end; 53. a pressure release valve;

60. a four-way valve; 61. a port A; 62. a port B; 63. a C port; 64. a D port;

11. a first one-way valve; 12. a high pressure shut-off valve; 13. a low pressure shut-off valve;

70. a refrigerant filling pipe; 71. and a second one-way valve.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.

For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.

As shown in fig. 1, according to an embodiment of the present utility model, a refrigerant system is provided.

The refrigerant system 100 includes a refrigerant circulation pipe 10 and a compressor 20 disposed on the refrigerant circulation pipe 10, wherein the refrigerant system 100 further includes a pressure relief pipe 50 and a pressure relief valve 53 disposed on the pressure relief pipe 50, specifically, the pressure relief valve 53 is used for controlling on-off of the pressure relief pipe 50, the pressure relief pipe 50 has a first end 51 and a second end 52, the first end 51 and the second end 52 of the pressure relief pipe 50 are respectively communicated with the refrigerant circulation pipe 10 of the air inlet end and the air outlet end of the compressor 20, so that when the pressure relief valve 53 is opened to make the pressure relief pipe 50 in a communicating state, a high pressure refrigerant in the refrigerant circulation pipe 10 of the air outlet end of the compressor 20 flows into the refrigerant circulation pipe 10 of the air inlet end of the compressor 20 through the pressure relief valve 53.

Specifically, the thermal expansion valve disposed in the refrigerant system 100 is in a closed state when the air conditioner is stopped and locks the refrigerant circulation pipeline 10, so in this embodiment, when the air conditioner receives a stop instruction and closes the compressor 20, the thermal expansion valve and other devices, the pressure release valve 53 is controlled to open to communicate the pressure release pipe 50, and the refrigerant in a high-pressure state in the refrigerant circulation pipeline 10 at the exhaust end of the compressor 20 flows into the refrigerant circulation pipeline 10 at the air inlet end of the compressor 20 through the pressure release pipe 50, so that the pressure of the refrigerant at the exhaust end of the compressor 20 is reduced and the pressure of the refrigerant at the air inlet end of the compressor 20 is increased, thereby reducing the pressure difference between the refrigerant at the exhaust end of the compressor 20 and the refrigerant at the air inlet end, ensuring that the high-low pressure difference of the compressor 20 is less than 10PSI (Pounds per square inch pounds force/square inch), ensuring that the compressor 20 can normally operate when the compressor 20 is restarted, and avoiding the overload protection condition of the compressor 20.

In the present embodiment, the refrigerant system 100 further includes a compressor 20, a first heat exchanger 30, and a second heat exchanger 40 connected in series in the refrigerant circulation line 10.

In some embodiments, as shown in fig. 1, 2 and 3, when the air conditioner is a single-cooling air conditioner, the air conditioner only has a cooling function, and the first heat exchanger 30 in the refrigerant system 100 is a condenser, the second heat exchanger 40 in the refrigerant system 100 is an evaporator, the first heat exchanger 30 is disposed at an outdoor unit of the air conditioner, and the second heat exchanger 40 is disposed at an indoor unit of the air conditioner.

The first end 51 of the pressure relief pipe 50 is located between the air-intake end of the compressor 20 and the air-intake end of the condenser, and the second end 52 is located between the air-intake end of the compressor 20 and the air-exhaust end of the evaporator, so that the first end 51 and the second end 52 are located as close to the air-intake end and the air-exhaust end of the compressor 20, respectively. Generally, the compressor 20 is disposed in an outdoor unit of the air conditioner, so that the first end 51 and the second end 52 are disposed as close to an air inlet end and an air outlet end of the compressor 20 as possible, and the whole of the pressure relief tube 50 is disposed in the outdoor unit, so that the total length of the pressure relief tube 50 is reduced, and the corresponding pressure relief speed is increased, and the retention of the refrigerant in the pressure relief tube 50 is reduced.

In other embodiments, as shown in fig. 4 and 5, when the air conditioner is a cooling and heating type air conditioner, the air conditioner has a cooling function and a heating function, and the four-way valve 60 is further provided in the refrigerant circulation line 10, and the flow direction of the refrigerant in the refrigerant circulation line 10 is changed by controlling the four-way valve 60 to switch in different communication states.

In the cooling mode, as shown in fig. 4, the first heat exchanger 30 is a condenser, the second heat exchanger 40 is an evaporator, and the flow direction of the refrigerant is the direction indicated by the arrow in fig. 4. In the heating mode, as shown in fig. 5, the first heat exchanger 30 is an evaporator, the second heat exchanger 40 is a condenser, and the flow direction of the refrigerant is the direction indicated by the arrow in fig. 5.

In detail, as shown in fig. 4 and 5, the four-way valve 60 includes an a port 61, a B port 62, a C port 63 and a D port 64, wherein the a port 61 is communicated with the exhaust end of the compressor 20, the C port 63 is communicated with the intake end of the compressor 20, the D port 64 is communicated with the first heat exchanger 30, the B port 62 is communicated with the second heat exchanger 40, the a port 61 is an inlet of the four-way valve 60, and the C port 63 is an outlet of the four-way valve 60.

In this embodiment, the first end 51 of the pressure relief pipe 50 is connected to the refrigerant circulation line 10 between the a port 61 and the exhaust end of the compressor 20, the second end 52 of the pressure relief pipe 50 is connected to the refrigerant circulation line 10 between the C port 63 and the intake end of the compressor 20, so that the first end 51 and the second end 52 are respectively disposed as close to the intake end and the exhaust end of the compressor 20 as possible, the whole pressure relief pipe 50 is disposed in the outdoor unit, the total length of the pressure relief pipe 50 is reduced, the corresponding pressure relief speed is further increased, and the retention of the refrigerant in the pressure relief pipe 50 is reduced.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the refrigerant system 100 is further provided with a first check valve 11, the first check valve 11 is disposed on the refrigerant circulation line 10, when the air conditioner is a single-cooled air conditioner, the first check valve 11 is disposed between the first end 51 of the pressure release pipe 50 and the air inlet end of the condenser, and the first check valve 11 is disposed adjacent to the first end 51. Through setting up first check valve 11, in the in-process of opening relief valve 53 and carrying out the pressure release to refrigerant system 100, because the refrigerant circulation pipeline 10 of first check valve 11 low reaches side and the high-pressure refrigerant in the condenser can't reverse through first check valve 11, consequently, only need unload the exhaust end of compressor 20 to the refrigerant pressure in the refrigerant circulation pipeline 10 between the first check valve 11 can, make the pressure release process of compressor 20 more connect and have less and the noise of short time more, be favorable to promoting user's use experience.

In some embodiments of the present utility model, as shown in fig. 4 and 5, the refrigerant system 100 is further provided with a first check valve 11, the first check valve 11 is disposed on the refrigerant circulation line 10, when the air conditioner is a cold and warm air conditioner, the first check valve 11 is disposed between the first end 51 of the pressure relief pipe 50 and the a port 61 of the four-way valve 60, and the first check valve 11 is disposed adjacent to the first end 51. Through setting up first check valve 11, in the in-process of opening relief valve 53 and carrying out the pressure release to refrigerant system 100, because the refrigerant circulation pipeline 10 of first check valve 11 low reaches side and the high-pressure refrigerant in the condenser can't reverse through first check valve 11, consequently, only need unload the exhaust end of compressor 20 to the refrigerant pressure in the refrigerant circulation pipeline 10 between the first check valve 11 can, make the pressure release process of compressor 20 more connect and have less and the noise of short time more, be favorable to promoting user's use experience.

By providing the first check valve 11, the pressure relief process of the compressor 20 can be rapidly completed within 1 minute, and noise can be reduced.

In some embodiments of the present utility model, after the first check valve 11 is disposed in the refrigerant system 100, if refrigerant is required to be filled in the refrigerant system 100 due to a refrigerant loss or the like, when the refrigerant is filled from the position of the high-pressure stop valve 12 in the refrigerant system 100, the refrigerant cannot reversely pass through the inside of the compressor 20 entering through the first check valve 11 when the refrigerant is migrated in the refrigerant circulation line 10, so that a vacuum state exists in the inside of the compressor 20, and there is a risk that the compressor 20 is damaged due to vacuum discharge.

In this embodiment, as shown in fig. 3 and 4, the refrigerant system 100 further includes a refrigerant charge pipe 70, the refrigerant charge pipe 70 is communicated with the refrigerant circulation line 10, and a connection position of the refrigerant charge pipe 70 and the refrigerant circulation line 10 is located between the first check valve 11 and the exhaust end of the compressor 20. In detail, when the refrigerant system 100 is filled with the refrigerant, the refrigerant is filled into the refrigerant system 100 from the refrigerant filling pipe 70, the refrigerant passes through the first check valve 11 in the forward direction and is stored in the condenser, and part of the gaseous refrigerant can migrate into the compressor 20 through the refrigerant circulation pipeline 10, so that the vacuum resistance in the compressor 20 can be rapidly increased, and the damage to the compressor 20 and the installation personnel caused by the vacuum discharge is avoided.

In some embodiments of the present utility model, a second check valve 71 is further disposed in the refrigerant filling pipe 70, and the second check valve 71 is used to make the refrigerant filling pipe 70 conduct unidirectionally from the external filling device to the direction of the refrigerant circulation pipe 10, so as to avoid the refrigerant in the refrigerant circulation pipe 10 from leaking out through the refrigerant filling pipe 70.

In some embodiments of the present utility model, as shown in fig. 3 and 4, the refrigerant system 100 further includes a high-pressure stop valve 12 and a low-pressure stop valve 13, wherein the high-pressure stop valve 12 and the low-pressure stop valve 13 are both disposed in series in the refrigerant circulation line 10, specifically, the high-pressure stop valve 12 is disposed between the exhaust end of the condenser and the intake end of the evaporator, and the low-pressure stop valve 13 is disposed between the exhaust end of the evaporator and the second end 52. In some embodiments, when it is necessary to charge the condenser in the outdoor unit with refrigerant, the high-pressure cut-off valve 12 may be used as a charging port to increase the efficiency of refrigerant charging.

When the air conditioner is a single-cooling type air conditioner, as shown in fig. 3, the high-temperature and high-pressure refrigerant in the compressor 20 is discharged through the exhaust end, then flows through the condenser to perform cooling heat exchange, the heat exchanged refrigerant sequentially passes through the throttling element in the refrigerant circulation pipeline 10 and the high-pressure stop valve 12 to further throttle and reduce the pressure of the refrigerant, then the refrigerant enters the evaporator in the indoor unit, flows through the evaporator to perform heat exchange, finally achieves the aim of cooling indoor air, and the refrigerant after heat exchange of the indoor unit flows back into the compressor 20 through the air inlet end after passing through the low-pressure stop valve 13, thereby realizing the refrigeration cycle of the single-cooling type air conditioner.

According to an embodiment of the utility model, an air conditioner is further provided, and the air conditioner comprises a refrigerant system. Specifically, the air conditioner provided by the utility model comprises, but is not limited to, a single-cooling type air conditioner, a cold-warm type air conditioner, a window type air conditioner, a split wall-mounted air conditioner, a split clothes closet air conditioner, a ceiling type air conditioner, an embedded air conditioner and a central air conditioner, and the air conditioner provided by the utility model has the same technical effects as a refrigerant system and is not repeated herein.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. The refrigerant system comprises a refrigerant circulation pipeline, and a compressor, a first heat exchanger and a second heat exchanger which are connected in series in the refrigerant circulation pipeline, and is characterized in that the refrigerant system further comprises:

the pressure relief pipe is provided with a first end and a second end, the first end is communicated with the refrigerant circulation pipeline where the exhaust end of the compressor is located, and the second end is communicated with the refrigerant circulation pipeline where the air inlet end of the compressor is located;

the pressure relief valve is arranged on the pressure relief pipe and used for controlling the on-off of the pressure relief pipe.

2. The refrigerant system as set forth in claim 1, wherein said first heat exchanger is a condenser and said second heat exchanger is an evaporator, said first end being connected to said refrigerant circulation line between an exhaust end of said compressor and an intake end of said condenser.

3. The refrigerant system as set forth in claim 2, wherein,

the second end is connected to the refrigerant circulation line between the air inlet end of the compressor and the air outlet end of the evaporator.

4. The refrigerant system as set forth in claim 1, further comprising a four-way valve disposed in said refrigerant circulation line, said first end being connected in communication with said refrigerant circulation line between an exhaust end of said compressor and an inlet of said four-way valve, said second end being connected in communication with said refrigerant circulation line between an intake end of said compressor and an outlet of said four-way valve.

5. The refrigerant system according to any one of claims 1 to 4, further comprising a first check valve provided to the refrigerant circulation line, the first check valve being provided adjacent to the first end and on a downstream side of the first end, the first check valve being configured such that refrigerant flows from the compressor toward the first heat exchanger.

6. The refrigerant system as set forth in claim 5, further comprising a refrigerant charge pipe, said refrigerant circulation line between said first check valve and said compressor being connected to a liquid outlet end of said refrigerant charge pipe.

7. The refrigerant system as set forth in claim 6, further comprising a second check valve provided to said refrigerant charge pipe, said second check valve being configured such that refrigerant flows from said refrigerant charge pipe toward said refrigerant circulation line.

8. The refrigerant system as set forth in claim 3, further comprising a high pressure shut-off valve disposed in said refrigerant circulation line between an exhaust end of said condenser and an intake end of said evaporator.

9. The refrigerant system as set forth in claim 8, further comprising a low pressure shut-off valve disposed in said refrigerant circulation line between a discharge end and said second end of said evaporator.

10. An air conditioner, characterized in that it comprises a refrigerant system as set forth in any one of claims 1-8.