Air conditioning system and air conditioner

Abstract

The air conditioning system comprises a refrigerant heat exchange flow path, a compressor and a reversing valve device, the refrigerant heat exchange flow path is provided with a first port and a second port, and the compressor is provided with an air outlet and an air return port. The first port, the second port, the air outlet and the air return port are all connected with the reversing valve device, the reversing valve device is configured to have a first state, a second state and a third state which can be mutually switched, when the reversing valve device is in the first state, the air outlet is communicated with the air return port, and when the reversing valve device is in the second state, the air return port is communicated with the air return port. And the first port is communicated with the second port. The air conditioning system can ensure that lubricating oil is normally heated in a low-temperature environment, and normal work of the compressor is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioning system and an air conditioner. Background Art

[0002] Air conditioning, also known as air conditioner, is a device that uses artificial means to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in a building or structure. It mainly includes a compressor, condenser and evaporator.

[0003] The existing compressor heating technology mainly uses a heating belt outside the compressor oil pool for heating. When the ambient temperature is very low, the heating belt is effective but cannot increase the temperature of the oil pool center. The lubricating oil temperature is low and the lubrication effect cannot be achieved. Utility Model Content

[0004] The main purpose of the embodiment of the utility model is to provide an air-conditioning system, aiming to improve the technical problem in the prior art that the compressor cannot heat the lubricating oil when the ambient temperature is very low.

[0005] The embodiment of the present invention provides an air conditioning system, comprising:

[0006] A refrigerant heat exchange flow path having a first port and a second port;

[0007] A compressor having an air outlet and an air return port;

[0008] A reversing valve device, the first port, the second port, the air outlet and the air return port are all connected to the reversing valve device, and the reversing valve device is configured to have a first state, a second state and a third state that can be switched with each other. When the reversing valve device is in the first state, the air outlet is connected to the air return port, and the first port is connected to the second port.

[0009] In some embodiments of the present invention, the air-conditioning system includes a control device and a first temperature monitoring device, the control device is connected to the first temperature monitoring device, the first temperature monitoring device is used to monitor the ambient temperature of the air-conditioning system and feed back to the control device, and the control device is used to control the reversing valve device to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device.

[0010] In some embodiments, the first temperature monitoring device is configured to feed back a first signal to the control device when it is detected that the ambient temperature is lower than a first preset temperature during the startup of the air-conditioning system;

[0011] The control device is configured to control the reversing valve device to switch to the first state after receiving the first signal.

[0012] In some embodiments, the air-conditioning system further includes a second temperature monitoring device, which is connected to the control device. The second temperature monitoring device is used to monitor the internal temperature of the compressor and feed back to the control device. The control device is used to control the reversing valve device to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device and the feedback signal of the second temperature monitoring device.

[0013] In some embodiments, the second temperature monitoring device is configured to feed back a second signal to the control device after monitoring that the internal temperature of the compressor reaches a second preset temperature, and the control device is configured to switch from the first state to the second state or the third state after receiving the second signal.

[0014] In some embodiments, when the reversing valve device is in the second state, the air outlet is communicated with the first port, and the second port is communicated with the air return port;

[0015] When the reversing valve device is in the third state, the air outlet is communicated with the second port, and the first port is communicated with the air return port.

[0016] In some embodiments, the refrigerant heat exchange flow path includes a condenser, a throttling device, and an evaporator connected in sequence, the first port is the medium inlet of the condenser, and the second port is the medium inlet of the evaporator.

[0017] In some embodiments, the refrigerant heat exchange flow path further includes a four-way valve, the four-way valve having a first interface, a second interface, a third interface, and a fourth interface, the second interface being used to connect to the medium inlet of the evaporator, and the fourth interface being used to connect to the medium inlet of the condenser;

[0018] The reversing valve device has a D interface, an S interface, a C interface and an R interface, the S interface is used to connect to the air outlet, the R interface is used to connect to the return air port, the D interface is used to connect to the third interface, and the C interface is used to connect to the first interface.

[0019] In some embodiments, the air conditioning system further comprises a gas-liquid separator, the inlet of the gas-liquid separator is connected to the reversing valve device, and the outlet of the gas-liquid separator is connected to the return air port.

[0020] In some embodiments, the present invention further provides an air conditioner, which also includes the above-mentioned air conditioning system.

[0021] An embodiment of the present utility model provides an air conditioning system and an air conditioner, the air conditioning system including a refrigerant heat exchange flow path, a compressor, and a reversing valve device, wherein a first port and a second port of the refrigerant heat exchange flow path, an air outlet and an air return port of the compressor are all connected to the reversing valve device, the reversing valve device is configured to have a first state, a second state, and a third state that can be switched to each other, and when the reversing valve device is switched to the first state, the air outlet and the air return port are connected. At this time, the compressed high-temperature refrigerant is discharged from the air outlet of the compressor and directly returned to the air return port of the compressor, and the higher-temperature refrigerant returns to the cylinder. The lubricating oil in the compressor oil pool circulates with the refrigerant and is then slowly heated, so that the temperature of the compressor lubricating oil is increased, so that the lubricating oil of the air conditioning system can normally lubricate the compressor under low-temperature conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0023] Figure 1 This is a structural schematic diagram of an air-conditioning system according to an embodiment of the present utility model when the reversing valve device is in a first state;

[0024] Figure 2 This is a structural schematic diagram of an air-conditioning system according to an embodiment of the present utility model when the reversing valve device is in the second state;

[0025] Figure 3 This is a structural schematic diagram of an air-conditioning system according to an embodiment of the present utility model when the reversing valve device is in the third state;

[0026] Figure 4 This is a structural diagram of the internal control structure of an air-conditioning system according to an embodiment of the present invention.

[0027] Figure numerals: 10, compressor, 20, reversing valve device, 30, refrigerant heat exchange flow path, 31, condenser; 32, throttling device; 33, evaporator; 40, four-way valve. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] like Figure 1-4As shown, the present invention provides an air conditioning system including a refrigerant heat exchange flow path 30, a compressor 10, and a reversing valve device 20. The refrigerant heat exchange flow path 30 has a first port and a second port, and the compressor 10 has an air outlet and an air return port. The first port, the second port, the air outlet, and the air return port are all connected to the reversing valve device 20. The reversing valve device 20 is configured to have a first state, a second state, and a third state that can be switched between them. When the reversing valve device 20 is in the first state, the air outlet is connected to the air return port, and the first port is connected to the second port.

[0033] It should be noted that compressor 10 generally includes a liquid storage tank and a main body, with a return air port provided on the liquid storage tank and an air outlet provided on the main body, with the liquid storage tank and the main body being in communication. Generally, when reversing valve assembly 20 is in the second or third state, compressor 10 communicates with refrigerant heat exchange flow path 30, achieving cooling or heating functions.

[0034] It is understandable that when the reversing valve device 20 is in the first state, at this time, the compressed high-temperature refrigerant is discharged from the air outlet of the compressor 10 and directly returned to the air return port of the compressor 10, and the higher-temperature refrigerant returns to the cylinder from the liquid storage tank of the compressor 10. At this time, the lubricating oil in the oil pool of the compressor 10 circulates with the refrigerant and is then slowly heated, so that the temperature of the lubricating oil in the compressor 10 is increased, so that the lubricating oil can normally lubricate the compressor 10. That is, by placing the reversing valve device 20 in the first state, the utility model enables the air-conditioning system to normally heat the lubricating oil even in a low-temperature environment, so that the lubricating oil can normally lubricate the compressor 10.

[0035] In some embodiments, the air-conditioning system includes a control device and a first temperature monitoring device. The control device is connected to the first temperature monitoring device. The first temperature monitoring device is used to monitor the ambient temperature of the air-conditioning system and feed back to the control device. The control device is used to control the reversing valve device 20 to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device.

[0036] It can be understood that the control device can adjust the state of the reversing valve according to the temperature information monitored by the first temperature monitoring device, so that when the ambient temperature is at a lower temperature, the reversing valve can be controlled to switch to the first state, so that the compressed high-temperature refrigerant in the compressor 10 is discharged from the air outlet of the compressor 10 and directly returned to the return air port of the compressor 10.

[0037] In some embodiments, the first temperature monitoring device is configured to feed back a first signal to the control device when the ambient temperature is detected to be lower than a first preset temperature during the startup of the air conditioning system. The control device is configured to control the reversing valve device 20 to switch to the first state after receiving the first signal.

[0038] It is understandable that during the startup process, when the first temperature monitoring device detects that the ambient temperature is lower than the first preset temperature, it feeds back a first signal to the control device, and the control device controls the switching state of the reversing valve device 20.

[0039] It should be noted that the first temperature monitoring device can be a temperature sensor, a temperature and humidity sensor, etc., and the control device can be a control mainboard arranged in the air conditioner, or an external computer device or a cloud device, etc.

[0040] In some embodiments, the air-conditioning system also includes a second temperature monitoring device, which is connected to the control device. The second temperature monitoring device is used to monitor the internal temperature of the compressor 10 and feed back to the control device. The control device is used to control the reversing valve device 20 to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device and the feedback signal of the second temperature monitoring device.

[0041] It is understandable that by monitoring the temperature inside the compressor 10, it is possible to determine whether the lubricating oil inside the compressor 10 has reached a lubricating state, thereby timely switching the reversing valve device 20 to the second state or the third state for heating or cooling.

[0042] In some embodiments, the second temperature monitoring device is configured to feed back a second signal to the control device after monitoring that the internal temperature of the compressor 10 reaches a second preset temperature. The control device is configured to switch from the first state to the second state or the third state after receiving the second signal.

[0043] It should be noted that the second temperature monitoring device may also be a temperature sensor, a temperature and humidity sensor, etc.

[0044] In some embodiments, the control device monitors the ambient temperature and the temperature in the compressor 10 in real time through a first temperature monitoring device and a second temperature monitoring device. When it is monitored that the temperature in the compressor 10 is lower than the second preset temperature, the reversing valve device 20 can be controlled to switch to the first state; when it is monitored that the ambient temperature is lower than the first preset temperature, the reversing valve device 20 can be controlled to switch to the first state.

[0045] In some embodiments, when the reversing valve device 20 is in the second state, the gas outlet communicates with the first port, and the second port communicates with the return port. When the reversing valve device 20 is in the third state, the gas outlet communicates with the second port, and the first port communicates with the return port.

[0046] It is understandable that the reversing valve device 20 may be an electronic four-way valve, which changes the flow direction of the refrigerant by switching the connection mode of each connection port to achieve cooling or heating function.

[0047] In some embodiments, the refrigerant heat exchange flow path 30 includes a condenser, a throttling device, and an evaporator connected in sequence, the first port is the medium inlet of the condenser, and the second port is the medium inlet of the evaporator.

[0048] It should be noted that the throttling device is generally a throttling valve. When the reversing valve device 20 is in the second state, the first port is connected to the air outlet, and the second port is connected to the return air port. The refrigerant flows through the condenser, the throttling device, and the evaporator in sequence, and finally flows into the return air port, that is, the refrigerant heat exchange path 30 is in a cooling state.

[0049] When the reversing valve device 20 is in the third state, the second port is connected to the air outlet, and the refrigerant flows through the evaporator, the throttling device and the condenser in sequence, and finally flows into the return air port, that is, the refrigerant heat exchange flow path 30 is in the heating state.

[0050] In some embodiments, the refrigerant heat exchange flow path 30 further includes a four-way valve having a first port, a second port, a third port, and a fourth port, wherein the second port is used to connect to the medium inlet of the evaporator, and the fourth port is used to connect to the medium inlet of the condenser;

[0051] The reversing valve device 20 has a D interface, an S interface, a C interface and an R interface. The S interface is used to connect to the air outlet, the R interface is used to connect to the air return port, the D interface is used to connect to the third interface, and the C interface is used to connect to the first interface.

[0052] In some embodiments, the air conditioning system further includes a gas-liquid separator, the inlet of the gas-liquid separator is connected to the reversing valve device 20, and the outlet of the gas-liquid separator is connected to the return air port.

[0053] In some embodiments, the present invention further provides an air conditioner, which includes the air conditioning system of some or all of the above embodiments. Therefore, the air conditioner has the beneficial effects of some or all of the embodiments of the above air conditioning system, which will not be described in detail here.

[0054] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the application concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An air conditioning system, characterized in that: include: A refrigerant heat exchange flow path having a first port and a second port; A compressor having an air outlet and an air return port; A reversing valve device, the first port, the second port, the air outlet and the air return port are all connected to the reversing valve device, the reversing valve device is configured to have a first state, a second state and a third state that can be switched with each other, when the reversing valve device is in the first state, the air outlet is connected to the air return port, and the first port is connected to the second port.

2. The air conditioning system according to claim 1, characterized in that: The air-conditioning system includes a control device and a first temperature monitoring device, the control device is connected to the first temperature monitoring device, the first temperature monitoring device is used to monitor the ambient temperature of the air-conditioning system and feed back to the control device, and the control device is used to control the reversing valve device to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device.

3. The air conditioning system according to claim 2, characterized in that: The first temperature monitoring device is configured to feed back a first signal to the control device when it is detected that the ambient temperature is lower than a first preset temperature during the startup of the air conditioning system; The control device is configured to control the reversing valve device to switch to the first state after receiving the first signal.

4. The air conditioning system according to claim 2, characterized in that: The air-conditioning system also includes a second temperature monitoring device, which is connected to the control device. The second temperature monitoring device is used to monitor the internal temperature of the compressor and feed back to the control device. The control device is used to control the reversing valve device to switch between the first state, the second state and the third state according to the feedback signal of the first temperature monitoring device and the feedback signal of the second temperature monitoring device.

5. The air conditioning system according to claim 4, characterized in that: The second temperature monitoring device is configured to feed back a second signal to the control device after monitoring that the internal temperature of the compressor reaches a second preset temperature, and the control device is configured to switch from the first state to the second state or the third state after receiving the second signal.

6. The air conditioning system according to any one of claims 1 to 5, characterized in that: When the reversing valve device is in the second state, the air outlet is communicated with the first port, and the second port is communicated with the air return port; When the reversing valve device is in the third state, the air outlet is communicated with the second port, and the first port is communicated with the air return port.

7. The air conditioning system according to claim 1, characterized in that: The refrigerant heat exchange flow path includes a condenser, a throttling device, and an evaporator which are connected in sequence. The first port is the medium inlet of the condenser, and the second port is the medium inlet of the evaporator.

8. The air conditioning system according to claim 7, characterized in that: The refrigerant heat exchange flow path also includes a four-way valve, the four-way valve has a first interface, a second interface, a third interface and a fourth interface, the second interface is used to connect to the medium inlet of the evaporator, and the fourth interface is used to connect to the medium inlet of the condenser; The reversing valve device has a D interface, an S interface, a C interface and an R interface, the S interface is used to connect to the air outlet, the R interface is used to connect to the air return port, the D interface is used to connect to the third interface, and the C interface is used to connect to the first interface.

9. The air conditioning system according to claim 1, characterized in that: The air conditioning system further comprises a gas-liquid separator, the inlet of the gas-liquid separator is connected to the reversing valve device, and the outlet of the gas-liquid separator is connected to the air return port.

10. An air conditioner, characterized in that: An air conditioning system comprising any one of claims 1-9.

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