Air conditioning device capable of supplementing refrigerant indoors

Abstract

The utility model discloses an air conditioning device capable of supplementing refrigerant indoors, which comprises an outdoor unit and an indoor unit, a compressor and a condenser are arranged in the outdoor unit, an evaporator and an expansion valve are arranged in the indoor unit, the air conditioning device further comprises a heat exchanger arranged indoors, and the outlet end of the heat exchanger is communicated to a pipeline between the condenser and the expansion valve through a pipeline bypass. Refrigerant can be supplemented on the indoor side in a liquid form, so that high-altitude operation can be avoided, and the safety is improved.

Description

Technical Field

[0001] The utility model relates to an air-conditioning device, in particular to an air-conditioning device capable of replenishing refrigerant indoors. Background Art

[0002] The existing air conditioning device structure is as follows Figure 1 As shown, the air conditioner includes an outdoor unit and an indoor unit. The outdoor unit integrates a compressor 1 and a condenser 2, while the indoor unit integrates an expansion valve 3 and an evaporator 4. The refrigerant outlet of compressor 1 is connected to the inlet of condenser 2 via a pipeline. The outlet of condenser 2 is connected to the inlet of expansion valve 3 via a pipeline. The outlet of expansion valve 3 is connected to the inlet of evaporator 4 via a pipeline. The outlet of evaporator 4 is connected to the refrigerant return port of compressor 1 via a pipeline. During operation, the high-temperature, high-pressure refrigerant gas, namely Freon gas, compressed and output by compressor 1 first releases heat to the outside through condenser 2 to form a medium-temperature, high-pressure liquid. The medium-temperature, high-pressure liquid is then throttled and cooled by expansion valve 3 to form a low-temperature, low-pressure liquid. The low-temperature, low-pressure liquid then enters evaporator 4, absorbs heat from the indoor air passing through evaporator 4, and forms a medium-temperature, low-pressure refrigerant gas. The medium-temperature, low-pressure refrigerant gas returns to compressor 1 and is compressed again to form a high-temperature, high-pressure refrigerant gas, thus completing the refrigeration cycle of the air conditioner.

[0003] When the Freon in an air conditioning system is low, it needs to be replenished promptly, otherwise the cooling effect will decrease. Existing air conditioning systems install a three-way valve 5 at the refrigerant outlet of compressor 1. One valve port of the three-way valve 5 is connected to the refrigerant outlet of compressor 1, another valve port of the three-way valve 5 is connected to the inlet of condenser 2, and the third valve port of the three-way valve 5 serves as a replenishment port. During replenishment, a Freon gas tank is used to replenish high-pressure Freon gas through the three-way valve 5 to the pipeline between compressor 1 and condenser 2. Therefore, refrigerant replenishment in existing air conditioning systems is carried out outdoors. For high-rise buildings, the air conditioning outdoor unit is installed outdoors, and refrigerant replenishment requires workers to work at height, which is quite dangerous and very inconvenient. Summary of the Invention

[0004] The utility model provides an air-conditioning device capable of replenishing refrigerant indoors, so as to solve the problem that the refrigerant replenishing port of the air-conditioning device in the prior art is located outdoors, resulting in inconvenience and high risk in refrigerant replenishment.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0006] An air-conditioning device capable of replenishing refrigerant indoors comprises an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor and a condenser, and the indoor unit comprises an evaporator and an expansion valve, wherein the compressor, condenser, expansion valve and evaporator are sequentially connected through pipelines to form a refrigeration cycle loop, and further comprises a heat exchanger arranged indoors, wherein the inlet end of the heat exchanger is connected to the inlet valve, and the outlet end of the heat exchanger is connected to the pipeline between the condenser and the expansion valve through a pipeline bypass.

[0007] Furthermore, it also includes a throttling tube, and the outlet end of the heat exchanger is connected to the pipeline between the condenser and the expansion valve through the throttling tube bypass.

[0008] Furthermore, it also includes a pressure sensor installed at the outlet end of the compressor, and the pressure sensor is electrically connected to the air-conditioning controller for signal transmission.

[0009] In this utility model, the refrigerant replenishing device includes a heat exchanger and an inlet valve, which are located indoors. When refrigerant replenishment is needed, a Freon gas tank delivers high-pressure refrigerant gas to the heat exchanger through the inlet valve. The high-pressure refrigerant gas releases heat into the room through the heat exchanger, forming a medium-temperature, high-pressure refrigerant liquid. The medium-temperature, high-pressure refrigerant liquid then enters the pipeline between the condenser and the expansion valve, and ultimately enters the expansion valve to join the refrigeration cycle. This allows refrigerant to be replenished indoors in liquid form.

[0010] In the present invention, the heat exchanger can also be connected to the condenser and the expansion valve through a throttling tube, and the refrigerant liquid flowing out of the heat exchanger can be further cooled and depressurized through the throttling tube.

[0011] Compared with the prior art, the utility model can replenish refrigerant in liquid form on the indoor side, thereby avoiding high-altitude operations, improving safety, and having the advantage of convenient replenishment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural principle diagram of an existing air-conditioning device.

[0013] Figure 2 It is a structural principle diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 2As shown, this embodiment discloses an air conditioning device capable of replenishing refrigerant indoors. The device comprises an outdoor unit, an indoor unit, and a heat exchanger 6 disposed indoors. The outdoor unit comprises a compressor 1 and a condenser 2, while the indoor unit comprises an evaporator 3 and an expansion valve 4. The refrigerant outlet of compressor 1 is connected to the inlet of condenser 2 via a pipeline. The outlet of condenser 2 is connected to one valve port of a three-way valve 5 via a pipeline. The other valve port of the three-way valve 5 is connected to the inlet of expansion valve 3. The inlet of heat exchanger 6 is connected to a valve 7, and the outlet of heat exchanger 6 is connected to the third valve port of the three-way valve 5 via a pipeline. The outlet of expansion valve 3 is connected to the inlet of evaporator 4 via a pipeline, and the outlet of evaporator 4 is connected to the refrigerant return port of compressor 1 via a pipeline.

[0016] As an improvement to this embodiment, this embodiment further includes a throttling tube 8 , the outlet end of the heat exchanger 6 is connected to the inlet end of the throttling tube 8 , and the outlet end of the throttling tube 8 is connected to the third valve port of the three-way valve 5 .

[0017] Therefore, when refrigerant replenishment is needed, a Freon tank is used to deliver high-pressure gaseous refrigerant to the heat exchanger 6 through the valve 7. The refrigerant gas releases heat into the room within the heat exchanger 6, transforming into a liquid. The liquid is then further cooled and depressurized by the throttle tube 8 before entering the expansion valve 3 through the three-way valve 5. Therefore, this embodiment allows refrigerant replenishment indoors. The heat exchanger 6, valve 7, and throttle tube 8 in this embodiment can be integrated into a single module, which can be integrated into the indoor unit of the air conditioner or installed separately on an indoor wall.

[0018] As an improvement to this embodiment, this embodiment also includes a pressure sensor 9 installed at the outlet end of the compressor. The pressure sensor 9 collects the refrigerant gas pressure output by the compressor 1. The pressure sensor 9 is electrically connected to the air-conditioning controller 10 for signal transmission. The air-conditioning controller 10 collects the pressure data collected by the pressure sensor 9 and compares it with a preset threshold. When the pressure data collected by the pressure sensor 9 is less than the preset threshold, it indicates that the refrigerant needs to be replenished. At this time, the air-conditioning controller 10 can issue an early warning.

[0019] Conventional air conditioners require refrigerant to be replenished outdoors, making refrigerant refilling inconvenient. Consequently, users typically only refill refrigerant when they notice a significant decrease in cooling performance, by which time the refrigerant shortage is already significant. However, this embodiment requires refrigerant to be replenished indoors, making refrigerant refill more convenient. The air conditioner controller 10 monitors the refrigerant pressure output by the compressor in real time, notifying the user when refrigerant is insufficient.

[0020] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner unless there is any contradiction. Such combinations, as long as they do not violate the concept of the present invention, should also be regarded as the contents disclosed in the present disclosure. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0021] The present invention is not limited to the specific details in the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by those skilled in the art should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims

1. An air conditioning device capable of replenishing refrigerant indoors, comprising an outdoor unit and an indoor unit, wherein the outdoor unit comprises a compressor and a condenser, and the indoor unit comprises an evaporator and an expansion valve, wherein the compressor, condenser, expansion valve, and evaporator are sequentially connected by pipes to form a refrigeration cycle, characterized in that: It also includes a heat exchanger arranged indoors, the inlet end of the heat exchanger is connected to an inlet valve, and the outlet end of the heat exchanger is connected to the pipeline between the condenser and the expansion valve through a pipeline bypass.

2. An air-conditioning device capable of replenishing refrigerant indoors according to claim 1, characterized in that: It also includes a throttling pipe, and the outlet end of the heat exchanger is connected to the pipeline between the condenser and the expansion valve through the throttling pipe bypass.

3. The air-conditioning device capable of replenishing refrigerant indoors according to claim 1, characterized in that: It also includes a pressure sensor installed at the outlet end of the compressor, and the pressure sensor is electrically connected to the air conditioner controller for signal transmission.

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