A double-coil heat exchanger

Abstract

A double-coil heat exchanger comprises a shell, an inner cylinder, a first spiral cylinder coil, a second spiral cylinder coil, a first baffle, a second baffle and a third baffle, the first baffle is spirally wound into a spiral cylinder, the second baffle is spirally wound into a spiral cylinder, and the third baffle is spirally wound into a spiral cylinder; the second spiral cylinder coil is embedded into the first spiral cylinder coil in parallel, a refrigerant inlet pipe is connected with one parallel end through a refrigerant inlet pipe hole, and a refrigerant outlet pipe is connected with the other parallel end through a refrigerant outlet pipe hole; the inner cylinder is embedded into the second spiral cylinder coil, the first baffle is matched with the inner surface of the shell and the first spiral cylinder coil, the second baffle is embedded into and matched with the second spiral cylinder coil and the first spiral cylinder coil, and the third baffle is matched with the outer surface of the inner cylinder and the second spiral cylinder coil. The arrangement of the first baffle, the second baffle and the third baffle increases the heat exchange time and the heat exchange area by changing the water flow direction, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] This utility model relates to a heat pump, and more particularly to a refrigerant and water heat exchange device. Background Technology

[0002] The existing technology, Chinese patent 201420806093.2, describes a titanium tube heat exchanger that can effectively improve heat exchange efficiency. It includes a shell and a top cover forming a sealed cavity at the top of the shell. The top of the shell has an outlet pipe and a flow switch on the outlet pipe, while the bottom of the shell has an inlet pipe. Inside the shell are an inner titanium coil connected to a refrigerant outlet extending outside the shell, and an outer titanium coil surrounding the inner titanium coil and connected to a refrigerant inlet extending outside the shell. The diameter of the inner titanium coil is smaller than that of the outer titanium coil. This titanium tube heat exchanger effectively improves heat exchange efficiency by using titanium coils of different diameters connecting the refrigerant inlet and outlet. When the refrigerant gas enters and releases heat, the larger diameter outer titanium coil reduces the pressure of the heat pump system, while when the refrigerant liquid flows out, the smaller diameter inner titanium coil ensures sufficient heat exchange, thus effectively improving the heat exchange efficiency of the titanium tube heat exchanger. The problem is that the heat exchange area between the water and the coil is small. Utility Model Content

[0003] The purpose of this invention is to provide a dual-coil heat exchanger with a large heat exchange area and high heat exchange efficiency.

[0004] This utility model is implemented as follows: a dual-coil heat exchanger, characterized in that it includes an outer shell, an inner cylinder, a first spiral cylindrical coil, a second spiral cylindrical coil, a first baffle plate, a second baffle plate, and a third baffle plate.

[0005] The outer casing includes a refrigerant inlet and a refrigerant outlet at the top, a hot water outlet at the upper part of the circumferential wall panel, and a cold water inlet at the lower part.

[0006] The first baffle plate is spirally wound into a spiral cylindrical shape.

[0007] The second baffle plate is spirally wound into a spiral cylindrical shape.

[0008] The third baffle plate is spirally wound into a spiral cylindrical shape;

[0009] The second spiral cylindrical coil is embedded in the first spiral cylindrical coil and connected in parallel. The refrigerant inlet pipe is connected to one parallel end through the refrigerant inlet pipe hole, and the refrigerant outlet pipe is connected to another parallel end through the refrigerant outlet pipe hole. The inner cylinder is embedded in the second spiral cylindrical coil. The first baffle plate is fitted with the inner surface of the outer shell and the first spiral cylindrical coil. The second baffle plate is embedded in the second spiral cylindrical coil and the first spiral cylindrical coil and fits together. The third baffle plate fits together with the outer surface of the inner cylinder and the second spiral cylindrical coil.

[0010] The special feature of the aforementioned dual-coil heat exchanger is that the cross-section of the second baffle plate is trapezoidal or square.

[0011] The dual-coil heat exchanger is characterized in that the cross-sections of the first baffle and the third baffle are hyperbolic.

[0012] This utility model discloses a dual-coil heat exchanger. The arrangement of the first baffle, the second baffle, and the third baffle changes the water flow direction, increasing the heat exchange time and heat exchange area, thereby improving the heat exchange efficiency. Attached Figure Description

[0013] Figure 1 This is the front view of this utility model.

[0014] Figure 2 This is a schematic diagram of the present invention. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0017] like Figure 1 , Figure 2 As shown, a dual-coil heat exchanger includes an outer shell 1, an inner cylinder 2, a first spiral cylindrical coil 3, a second spiral cylindrical coil 4, a first baffle 5, a second baffle 6, and a third baffle 7.

[0018] The outer casing 1 includes a refrigerant inlet and a refrigerant outlet at the top, a hot water outlet 11 at the upper part of the circumferential wall panel, and a cold water inlet 12 at the lower part.

[0019] Inner cylinder 2 is hollow and sealed;

[0020] The first baffle plate 5 is spirally wound into a spiral cylindrical shape.

[0021] The second baffle plate 6 is spirally wound into a spiral cylindrical shape.

[0022] The third baffle plate 7 is spirally wound into a spiral cylindrical shape;

[0023] The second spiral cylindrical coil 4 is embedded in the first spiral cylindrical coil 3 and connected in parallel. The refrigerant inlet pipe is connected to one parallel end through the refrigerant inlet pipe hole, and the refrigerant outlet pipe is connected to another parallel end through the refrigerant outlet pipe hole. The inner cylinder 2 is embedded in the second spiral cylindrical coil 4. The first baffle 5 is fitted with the inner surface of the outer shell 1 and the first spiral cylindrical coil 3. The second baffle 6 is embedded in the second spiral cylindrical coil 4 and the first spiral cylindrical coil 3 and fits together. The third baffle 7 is fitted with the outer surface of the inner cylinder 2 and the second spiral cylindrical coil 4.

[0024] The cross-section of the second baffle plate 6 is trapezoidal or square.

[0025] The cross-sections of the first baffle 5 and the third baffle 7 are hyperbolic.

[0026] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A dual-coil heat exchanger, characterized in that: It includes an outer shell, an inner cylinder, a first spiral cylindrical coil, a second spiral cylindrical coil, a first baffle, a second baffle, and a third baffle. The outer casing includes a refrigerant inlet and a refrigerant outlet at the top, a hot water outlet at the upper part of the circumferential wall panel, and a cold water inlet at the lower part. The first baffle plate is spirally wound into a spiral cylindrical shape. The second baffle plate is spirally wound into a spiral cylindrical shape. The third baffle plate is spirally wound into a spiral cylindrical shape; The second spiral cylindrical coil is embedded in the first spiral cylindrical coil and connected in parallel. The refrigerant inlet pipe is connected to one parallel end through the refrigerant inlet pipe hole, and the refrigerant outlet pipe is connected to another parallel end through the refrigerant outlet pipe hole. The inner cylinder is embedded in the second spiral cylindrical coil. The first baffle plate is fitted with the inner surface of the outer shell and the first spiral cylindrical coil. The second baffle plate is embedded in the second spiral cylindrical coil and the first spiral cylindrical coil and fits together. The third baffle plate fits together with the outer surface of the inner cylinder and the second spiral cylindrical coil.

2. The dual-coil heat exchanger according to claim 1, characterized in that: The cross-section of the second baffle is trapezoidal or square.

3. A dual-coil heat exchanger according to claim 1, characterized in that: The cross-sections of the first and third baffles are hyperbolic.

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