Air conditioner heat pump device

Abstract

The utility model discloses an air conditioner heat pump device which comprises a compressor, a liquid storage device, a first heat exchanger and a second heat exchanger, the first heat exchanger and the second heat exchanger are connected with the compressor through a first pipeline, and the liquid storage device is used for storing refrigerants. When the heat pump device works in a refrigeration cycle state, the first heat exchanger is used as an evaporator, and the second heat exchanger is used as a condenser; a first pipe opening and a second pipe opening are formed in the bottom wall of the liquid storage device, and the liquid storage device is connected with the end, close to the first heat exchanger, of the first pipeline based on the first pipe opening and a first connecting pipe inserted into the first pipe opening. The liquid storage device is connected with the end, close to the second heat exchanger, of the first pipeline based on the second pipe opening and a second connecting pipe inserted into the second pipe opening, and the bottom wall of the liquid storage device is located above a pipeline connector, connected with the first pipeline, of the first heat exchanger. The air conditioner heat pump device provided by the technical scheme of the utility model can effectively save the use of refrigerants and save the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to an air conditioning heat pump device. Background Art

[0002] In traditional air conditioning systems, the design of the liquid reservoir is usually in a straight-mounted form, and the connection pipe opening is mostly located near the top of the liquid reservoir. This design has certain limitations, especially when the liquid reservoir copper tube cannot be fully extended into the bottom of the liquid reservoir, resulting in the refrigerant at the bottom not being fully utilized by the system. In addition, part of the refrigerant remains at the bottom of the liquid reservoir and fails to circulate effectively, which causes certain technical waste and may affect the overall performance of the system.

[0003] For heat pump units, there is a difference in the amount of refrigerant required when running in cooling and heating modes. More refrigerant may be required in cooling mode, but less in heating mode. Therefore, it is particularly important to design a reservoir that can adapt to this change and store excess refrigerant. However, the existing reservoir design does not fully take this demand into account, especially in the installation form and structure of the reservoir. This design deficiency makes it difficult to call the refrigerant at the bottom when the system needs to quickly adjust the refrigerant usage, thereby affecting the response speed and efficiency of the system. For this reason, existing heat pump units are generally equipped with a higher surplus amount of refrigerant, but this practice not only increases the initial cost of the equipment, but also leads to waste of refrigerant. Utility Model Content

[0004] The utility model aims to provide an air conditioning heat pump device which can make the refrigerant in the unit fully play its role and reduce the usage of the refrigerant.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an air-conditioning heat pump device, which includes a compressor, a liquid reservoir, and a first heat exchanger and a second heat exchanger connected to the compressor, the first heat exchanger and the second heat exchanger are connected by a first pipe, and the liquid reservoir is used to store refrigerant; when the heat pump device works in a refrigeration cycle state, the first heat exchanger is used as an evaporator and the second heat exchanger is used as a condenser; a first pipe opening and a second pipe opening are provided on the bottom wall of the liquid reservoir, the liquid reservoir is connected to an end of the first pipe close to the first heat exchanger based on the first pipe opening and a first connecting pipe inserted into the first pipe opening, the liquid reservoir is connected to an end of the first pipe close to the second heat exchanger based on the second pipe opening and a second connecting pipe inserted into the second pipe opening, and the bottom wall of the liquid reservoir is located above the pipe interface of the first heat exchanger connected to the first pipe.

[0006] Preferably, the first heat exchanger is a fin-type heat exchanger, and the second heat exchanger is a shell-and-tube heat exchanger.

[0007] Preferably, the depth of the first connecting pipe inserted into the first pipe opening is not greater than the thickness of the first pipe opening, and the depth of the second connecting pipe inserted into the second pipe opening is not greater than the thickness of the second pipe opening.

[0008] Preferably, it further comprises an economizer connected to the first heat exchanger and the second heat exchanger, and both ends of the economizer are connected to the first pipeline through a third connecting pipe and a fourth connecting pipe, respectively.

[0009] Preferably, one end of the economizer is connected to the first pipeline through an expansion valve.

[0010] Preferably, the compressor is a variable frequency compressor, the compressor is connected to the first heat exchanger and the second heat exchanger through a four-way valve, the four-way valve is connected to the first heat exchanger through a second pipeline, and the four-way valve is connected to the second heat exchanger through a third pipeline.

[0011] Compared with the prior art, the air-conditioning heat pump device provided by the above technical solution of the utility model sets the connecting pipe port of the liquid reservoir at the bottom and adjusts the installation height of the liquid reservoir to be higher than the heat exchanger, so that the refrigerant can flow smoothly from the bottom of the liquid reservoir to other parts of the device, thereby reducing the residual and waste of refrigerant in the liquid reservoir. In addition, for both cooling and heating modes, the device can fully guarantee operation and effectively save the use of refrigerant. Due to the reduction of refrigerant, the liquid reservoir can even adopt a smaller model to save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a refrigerant circulation flow diagram of the air-conditioning heat pump device in the heating cycle in the embodiment of the utility model.

[0013] Figure 2 This is a refrigerant circulation flow diagram of an air-conditioning heat pump device in a refrigeration cycle in an embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0015] As shown in the figure, this embodiment discloses an air conditioning heat pump device, which includes a compressor 1, a liquid storage tank 4, and a first heat exchanger 2 and a second heat exchanger 3 connected to the compressor 1.

[0016] The first heat exchanger 2 and the second heat exchanger 3 are connected via a first pipe G1 so that the refrigerant circulates between the first heat exchanger 2 and the second heat exchanger 3 , and the liquid storage tank 4 is used to store the refrigerant.

[0017] When the heat pump device operates in a refrigeration cycle state, the first heat exchanger 2 is used as an evaporator, and the second heat exchanger 3 is used as a condenser. Correspondingly, when the heat pump device operates in a heating cycle state, the first heat exchanger 2 is used as a condenser, and the second heat exchanger 3 is used as an evaporator.

[0018] The bottom wall of the liquid reservoir 4 is provided with a first pipe opening K1 and a second pipe opening K2. The liquid reservoir 4 is connected to one end of the first pipe G1 close to the first heat exchanger 2 based on the first pipe opening K1 and the first connecting pipe L1 inserted into the first pipe opening K1. The liquid reservoir 4 is connected to one end of the first pipe G1 close to the second heat exchanger 3 based on the second pipe opening K2 and the second connecting pipe L2 inserted into the second pipe opening K2. The bottom wall of the liquid reservoir 4 is located above the pipe interface K3 of the first heat exchanger 2 connected to the first pipe G1. The liquid reservoir 4 in this embodiment is an inverted structure, that is, the first pipe opening K1 and the second pipe opening K2 for the liquid reservoir 4 to enter and exit are provided on the bottom wall.

[0019] In this embodiment, the installation height of the liquid reservoir 4 is higher than the height of the pipe interface K3 of the first heat exchanger 2. Such installation can ensure that when the heat pump device is running for cooling, the refrigerant in the system will not be stored in the liquid reservoir 4. Because the liquid reservoir 4 is installed at a higher position, when running for cooling, even if the refrigerant flows through the liquid reservoir 4, it will flow out due to gravity and will not accumulate in large quantities at the bottom of the liquid reservoir 4, thereby effectively reducing the amount of refrigerant configured in the heat pump device.

[0020] Specifically, the first heat exchanger 2 is a fin-type heat exchanger, and the second heat exchanger 3 is a shell-and-tube heat exchanger.

[0021] On the other hand, the depth of the first connecting pipe L1 inserted into the first pipe opening K1 is not greater than the thickness of the first pipe opening K1, and the depth of the second connecting pipe L2 inserted into the second pipe opening K2 is not greater than the thickness of the second pipe opening K2, thereby avoiding refrigerant residue at the pipe opening in the liquid reservoir 4.

[0022] On the other hand, the heat pump device further includes an economizer 5 connected to the first heat exchanger 2 and the second heat exchanger 3 , and both ends of the economizer 5 are connected to the first pipeline G1 through a third connecting pipe L3 and a fourth connecting pipe L4 , respectively.

[0023] Specifically, one end of the economizer 5 is connected to the first pipeline G1 through the expansion valve M1.

[0024] On the other hand, the compressor 1 is a variable frequency compressor 1, and the compressor 1 is connected to the first heat exchanger 2 and the second heat exchanger 3 through a four-way valve M2. The four-way valve M2 is connected to the first heat exchanger 2 through a second pipe G2, and the four-way valve M2 is connected to the second heat exchanger 3 through a third pipe G3.

[0025] Based on the above air conditioning heat pump device, when the heating mode is operated, as shown in the figure, after the refrigerant flows out of the compressor 1, it passes through the four-way valve M2, the first heat exchanger 2, the liquid storage tank 4, the economizer 5, the expansion valve M1, the second heat exchanger 3 in sequence, and finally flows back to the compressor 1 through the four-way valve M2. During the circulation of the refrigerant, the excess refrigerant can be stored in the liquid storage tank 4.

[0026] When the cooling mode is running, as shown in the figure, the refrigerant flows out of the compressor 1 and passes through the four-way valve M2, the second heat exchanger 3, the economizer 5, the expansion valve M1, the liquid storage tank 4, the first heat exchanger 2 in sequence, and finally flows back to the compressor 1 through the four-way valve M2.

[0027] During the refrigeration mode cycle, since the liquid reservoir 4 is installed at a higher position, when the refrigeration is running, even if the refrigerant flows through the liquid reservoir 4, it will flow out due to gravity and will not accumulate in the bottom of the liquid reservoir 4 in large quantities.

[0028] It can be seen that for both cooling and heating modes, this system can fully guarantee operation and effectively save the use of refrigerant. Due to the reduction of refrigerant, the liquid storage tank 4 can even use a smaller model to save costs.

[0029] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. An air conditioning heat pump device, characterized in that: The heat pump device comprises a compressor, a liquid reservoir, and a first heat exchanger and a second heat exchanger connected to the compressor. The first heat exchanger and the second heat exchanger are connected by a first pipe, and the liquid reservoir is used to store refrigerant. When the heat pump device works in a refrigeration cycle state, the first heat exchanger is used as an evaporator, and the second heat exchanger is used as a condenser. A first pipe opening and a second pipe opening are provided on the bottom wall of the liquid reservoir. The liquid reservoir is connected to an end of the first pipe close to the first heat exchanger based on the first pipe opening and a first connecting pipe inserted into the first pipe opening. The liquid reservoir is connected to an end of the first pipe close to the second heat exchanger based on the second pipe opening and a second connecting pipe inserted into the second pipe opening. The bottom wall of the liquid reservoir is located above a pipe interface of the first heat exchanger connected to the first pipe.

2. The air conditioning heat pump device according to claim 1, characterized in that: The first heat exchanger is a fin-type heat exchanger, and the second heat exchanger is a shell-and-tube heat exchanger.

3. The air conditioning heat pump device according to claim 1, characterized in that: The depth of the first connecting pipe inserted into the first pipe opening is not greater than the thickness of the first pipe opening, and the depth of the second connecting pipe inserted into the second pipe opening is not greater than the thickness of the second pipe opening.

4. The air conditioning heat pump device according to claim 1, characterized in that: It also includes an economizer connected to the first heat exchanger and the second heat exchanger, and two ends of the economizer are connected to the first pipeline through a third connecting pipe and a fourth connecting pipe respectively.

5. The air conditioning heat pump device according to claim 4, characterized in that: One end of the economizer is connected to the first pipeline through an expansion valve.

6. The air conditioning heat pump device according to claim 1, characterized in that: The compressor is a variable frequency compressor, which is connected to the first heat exchanger and the second heat exchanger through a four-way valve, which is connected to the first heat exchanger through a second pipeline, and which is connected to the second heat exchanger through a third pipeline.

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