Cascade type air source heat pump evaporator

Abstract

The utility model relates to a cascade type air source heat pump evaporator which comprises two evaporator bodies arranged in a V shape or an L shape, each evaporator body comprises a frame, a high-temperature side fin and a low-temperature side fin, and the high-temperature side fin and the low-temperature side fin are oppositely arranged in the frame. The high-temperature side fins and the low-temperature side fins are connected with a high-temperature side unit and a low-temperature side unit of the heat pump unit through conveying pipelines respectively. The heat pump unit has the advantages that when the environment temperature is low, the low-temperature side unit absorbs heat in air through the low-temperature side fins in the two frames, the heat is transmitted to the plate heat exchanger in the heat pump unit through the conveying pipeline, the high-temperature side unit absorbs heat in the plate heat exchanger, and high heat is produced; at the moment, the high-temperature side unit uses the high-temperature side fins in the two frames to produce heat, and the low-temperature side unit stops working. Therefore, when the low-temperature-side unit or the high-temperature-side unit operates, the corresponding low-temperature-side fins or the corresponding high-temperature-side fins are arranged in the two frames.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump units, and particularly to a cascade air source heat pump evaporator. Background Technique

[0002] At present, in the cascade air source heat pumps of single-stage and double-stage systems on the market, generally two evaporators are arranged in a V shape or an L shape inside the unit. The low-temperature stage system is connected to one of the evaporators (from 2 to 5 layers), and the high-temperature stage system is connected to the other evaporator.

[0003] In this connection mode, when the low-temperature side unit or the high-temperature side unit in the heat pump unit operates, only one side of the evaporator is in use, while the other side evaporator is out of use. When the axial flow fan works to suck air, the air pressures on both sides of the evaporators are unbalanced. Especially when operating at low temperatures, ice forms on one side of the evaporator, and its air intake is different from that of the other side, thus affecting the overall performance of the unit. Content of the Utility Model

[0004] The purpose of the utility model is to provide a cascade air source heat pump evaporator to solve the above problems existing in the prior art.

[0005] The technical solution for the utility model to solve the above technical problems is as follows:

[0006] A cascade air source heat pump evaporator includes two evaporator bodies arranged in a V shape or an L shape. Each evaporator body includes a frame and a high-temperature side fin and a low-temperature side fin oppositely arranged inside the frame. The low-temperature side fin and the high-temperature side fin are respectively connected to the low-temperature side unit and the high-temperature side unit of the heat pump unit through a conveying pipeline.

[0007] The beneficial effect of the utility model is that when the environmental temperature is low, the low-temperature side unit uses the low-temperature side fins in the two frames to absorb heat from the air, and transfers it to the plate heat exchanger inside the heat pump unit through the conveying pipeline. The high-temperature side unit absorbs the heat in the plate heat exchanger to produce high heat. When the environmental temperature is high, the low-temperature side unit stops operating. At this time, the high-temperature side unit uses the high-temperature side fins in the two frames to produce heat, so that when either the low-temperature side unit or the high-temperature side unit operates, there are corresponding low-temperature side fins or high-temperature side fins in use inside the two frames, ensuring that when the axial flow fan works, the air resistance and air pressure in the two evaporator bodies can be kept consistent.

[0008] Based on the above technical solution, the utility model can also be improved as follows.

[0009] Further, one side of the high-temperature side fins and the low-temperature side fins on each evaporator body is connected to the conveying pipeline, and the two conveying pipelines are respectively located on both sides of the frame.

[0010] Further, mounting plates are fixedly installed on both side surfaces of the high-temperature side fins and the low-temperature side fins, and both the high-temperature side fins and the low-temperature side fins are detachably installed in the frame through the mounting plates.

[0011] Further, fixing plates are detachably installed on both sides of the frame, and the opposite side surfaces of the two fixing plates are respectively in contact with one side surface of the high-temperature side fins and the low-temperature side fins.

[0012] Further, a plurality of mounting holes are formed in the lower parts of the front and rear sides of each frame and are located between the high-temperature side fins and the low-temperature side fins, and electric heating tubes can be inserted into the interiors of the plurality of mounting holes.

[0013] Further, the frame is made of stainless steel. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of two evaporator bodies of the present utility model;

[0015] Figure 2 is a schematic structural diagram of the high-temperature side fins of the present utility model;

[0016] Figure 3 is a schematic diagram of the evaporator body and the heat pump of the present utility model;

[0017] Figure 4 is the present utility model Figure 1 Enlarged view at A in.

[0018] In the drawings, the list of components represented by each reference numeral is as follows:

[0019] 1. Frame; 2. High-temperature side fins; 3. Low-temperature side fins; 4. Conveying pipeline; 5. Mounting plate; 6. Fixing plate; 7. Mounting hole. Detailed Embodiment

[0020] The principles and features of the present utility model are described below with reference to the drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model.

[0021] As Figures 1 to 4As shown in the figure, Embodiment 1 of the present utility model provides a cascade air source heat pump evaporator, which includes two evaporator bodies arranged in a V shape or an L shape. Each evaporator body includes a frame 1, and a high-temperature side fin 2 and a low-temperature side fin 3 oppositely arranged inside the frame 1. The high-temperature side fin 2 and the low-temperature side fin 3 are respectively connected to the high-temperature side unit and the low-temperature side unit of the heat pump unit through a conveying pipeline 4.

[0022] When the ambient temperature is low, the low-temperature side unit uses the low-temperature side fins 3 in the two frames 1 to absorb heat from the air, and transfers it to the plate heat exchanger inside the heat pump unit through the conveying pipeline 4. The high-temperature side unit absorbs heat from the plate heat exchanger to produce high-temperature heat. When the ambient temperature is high, the low-temperature side unit stops operating. At this time, the high-temperature side unit uses the high-temperature side fins 2 in the two frames 1 to produce heat, so that when either the low-temperature side unit or the high-temperature side unit is operating, there are corresponding high-temperature side fins 3 or low-temperature side fins 2 available inside the two frames 1, ensuring that when the axial flow fan is working, the air resistance and air pressure inside the two evaporator bodies can be kept consistent.

[0023] Embodiment 2 of the present utility model provides a cascade air source heat pump evaporator. On the basis of Embodiment 1, one side of the high-temperature side fin 2 and the low-temperature side fin 3 on each evaporator body is connected to the conveying pipeline 4, and the two conveying pipelines 4 are respectively located on the front and back sides of the frame 1.

[0024] By setting the conveying pipeline 4, it is convenient to convey the refrigerant from the heat pump unit into the evaporator body.

[0025] Embodiment 3 of the present utility model provides a cascade air source heat pump evaporator. On the basis of Embodiment 1 or 2, mounting plates 5 are fixedly installed on both side surfaces of the high-temperature side fin 2 and the low-temperature side fin 3. The high-temperature side fin 2 and the low-temperature side fin 3 are detachably installed inside the frame 1 through the mounting plates 5.

[0026] By setting the mounting plates 5, it is convenient to install the high-temperature side fin 2 and the low-temperature side fin 3. At the same time, when maintenance is required, it is convenient for the staff to disassemble them.

[0027] Embodiment 4 of the present utility model provides a cascade air source heat pump evaporator. On the basis of any one of Embodiments 1 to 3, fixing plates 6 are detachably installed on both sides of the frame 1, and one side surfaces of the two fixing plates 6 are respectively in contact with one side surfaces of the high-temperature side fin 2 and the low-temperature side fin 3.

[0028] By setting the fixing plates 6, one side of the high-temperature side fin 2 and the low-temperature side fin 3 is limited, avoiding the displacement of the high-temperature side fin 2 and the low-temperature side fin 3 when the unit is operating.

[0029] Embodiment 5 of the present utility model: A cascade air source heat pump evaporator. On the basis of any one of Embodiments 1 to 4, a plurality of mounting holes 7 are provided at the lower parts of the front and rear sides of each frame 1 and between the high-temperature side fins 2 and the low-temperature side fins 3, and electric heating tubes can be inserted into the interiors of the plurality of mounting holes 7.

[0030] The electric heating tubes are installed in a detachable manner, enabling the staff to install a quantified number of electric heating tubes according to requirements. When frosting occurs inside the frame 1, defrosting is carried out through the bottom auxiliary electric heating tubes, reducing the defrosting time for the overall system, preventing internal frosting, increasing the air resistance, and affecting the heating capacity.

[0031] Embodiment 6 of the present utility model: A cascade air source heat pump evaporator. On the basis of any one of Embodiments 1 to 5, the frame 1 is made of stainless steel.

[0032] Stainless steel has good mechanical properties and can withstand large forces and pressures, ensuring the stability and safety of the frame 1.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cascade air source heat pump evaporator, characterized in that: The invention comprises two evaporator bodies arranged in a V-shape or an L-shape, each of the evaporator bodies comprising a frame (1) and high-temperature side fins (2) and low-temperature side fins (3) arranged relatively inside the frame (1), the high-temperature side fins (2) and the low-temperature side fins (3) being connected to the high-temperature side unit and the low-temperature side unit of the heat pump unit respectively through a delivery pipe (4).

2. The cascade air source heat pump evaporator according to claim 1, characterized in that: One side of the high-temperature side fin (2) and the low-temperature side fin (3) on each evaporator body is connected to the delivery pipe (4), and the two delivery pipes (4) are respectively located on the front and rear sides of the frame (1).

3. The cascade air source heat pump evaporator according to claim 1, characterized in that: Mounting plates (5) are fixedly mounted on both side surfaces of the high-temperature side fins (2) and the low-temperature side fins (3); the high-temperature side fins (2) and the low-temperature side fins (3) are detachably mounted in the frame (1) via the mounting plates (5).

4. The cascade air source heat pump evaporator according to claim 1, characterized in that: Fixing plates (6) are detachably mounted on both sides of the frame (1), and opposite side surfaces of the two fixing plates (6) are in contact with one side surface of the high-temperature side fin (2) and the low-temperature side fin (3), respectively.

5. The cascade air source heat pump evaporator according to claim 1, characterized in that: A plurality of mounting holes (7) are provided at the lower parts of the front and rear sides of each frame (1) and between the high-temperature side fins (2) and the low-temperature side fins (3), and electric heating tubes can be plugged into the interiors of the plurality of mounting holes (7).

6. The cascade air source heat pump evaporator according to claim 1, characterized in that: The frame (1) is made of stainless steel.

Images