Plate heat exchanger and water heater

Abstract

The utility model provides a plate heat exchanger and a water heater, and belongs to the technical field of liquid heat exchange. The plate heat exchanger comprises a heat exchange plate assembly and a pressing plate assembly, the heat exchange plate assembly is provided with a plurality of mutually-communicated cold water cavities and a plurality of mutually-communicated hot water cavities in a surrounding mode, the cold water cavities and the hot water cavities are arranged alternately, and first cleaning drain outlets are formed in the positions, corresponding to the cold water cavities, of the first side of the heat exchange plate assembly; the pressing plate assembly comprises a first pressing plate, a second pressing plate, a first sealing gasket and a second sealing gasket, the first pressing plate is detachably and fixedly connected to the first side of the heat exchange plate assembly, the first sealing gasket is located between the first pressing plate and the heat exchange plate assembly, and the second pressing plate is detachably and fixedly connected to the second side of the heat exchange plate assembly. The first sealing gasket is configured to block the first cleaning drain outlet, the second pressing plate is detachably and fixedly connected to the second side of the heat exchange plate assembly, the second sealing gasket is located between the second pressing plate and the heat exchange plate assembly, and the second sealing gasket is configured to block the second cleaning drain outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid heat exchange, in particular to a plate heat exchanger and a water heater. Background Art

[0002] Affected by the structural space, the plate heat exchangers equipped in most household gas heating hot water boilers on the market are made of multiple layers of heat exchange plates welded together, and no dedicated cold and hot water channel cleaning and drainage outlets are reserved. Cleaning and drainage can only be achieved through the cold and hot water inlet and outlet ports.

[0003] The traditional cleaning method is not only difficult to operate, but also fails to clean the stubborn scale, which affects the heat exchange effect. It may even cause the plate heat exchanger to become ineffective due to scale blockage, resulting in a waste of resources. Utility Model Content

[0004] The utility model aims to provide a plate heat exchanger, which is easy to clean, improves the heat conduction of the cavity wall, avoids the plate heat exchanger being blocked by scale and has to be replaced with a new heat exchanger, thereby reducing the use cost.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] According to one aspect of the utility model, a plate heat exchanger is provided, including a heat exchange plate assembly and a pressure plate assembly, the heat exchange plate assembly is surrounded by a plurality of cold water chambers and a plurality of hot water chambers that are interconnected, the cold water chambers and the hot water chambers are arranged alternately, a first cleaning drain outlet is opened at a first side of the heat exchange plate assembly corresponding to the position of each cold water chamber, a second cleaning drain outlet is opened at a second side of the heat exchange plate assembly corresponding to the position of each hot water chamber, the pressure plate assembly includes a first pressure plate, a second pressure plate, a first sealing gasket and a second sealing gasket, the first pressure plate is detachably fixed to the first side of the heat exchange plate assembly, the first sealing gasket is located between the first pressure plate and the heat exchange plate assembly, the first sealing gasket is configured to block the first cleaning drain outlet, the second pressure plate is detachably fixed to the second side of the heat exchange plate assembly, the second sealing gasket is located between the second pressure plate and the heat exchange plate assembly, and the second sealing gasket is configured to block the second cleaning drain outlet.

[0007] According to an embodiment of the utility model, a first connecting portion is provided in the middle of the first pressing plate, and a second connecting portion is provided on the second pressing plate corresponding to the first connecting portion, and the second connecting portion is detachably connected to the first connecting portion.

[0008] According to one embodiment of the utility model, the first connecting part is the first folded part at one end of the first pressure plate, the first folded part is located on the front or back of the heat exchange plate assembly, a hanging hole is provided at one end of the first folded part, and the second connecting part is the second folded part at one end of the second pressure plate, a hook is provided at one end of the second folded part, and the hook is hung with the hanging hole.

[0009] According to one embodiment of the utility model, a third connection part and a fourth connection part are respectively provided at both ends of the first pressure plate, a fifth connection part and a sixth connection part are respectively provided at both ends of the second pressure plate corresponding to the third connection part and the fourth connection part, the fifth connection part is detachably connected to the third connection part, and the sixth connection part is detachably connected to the fourth connection part.

[0010] According to an embodiment of the present utility model, the cross-sections of the first pressing plate and the second pressing plate are both C-shaped, and the longitudinal sections of the first pressing plate and the second pressing plate are both L-shaped.

[0011] According to one embodiment of the utility model, the heat exchange plate assembly includes a bottom plate, a top plate and a plurality of heat exchange plates, the cold water chamber and the hot water chamber are formed by a plurality of heat exchange plates, the plurality of heat exchange plates are fixed between the bottom plate and the top plate, the edge of the heat exchange plate has an annular flange, and the first cleaning sewage outlet and the second cleaning sewage outlet are both located on the annular flange.

[0012] According to one embodiment of the utility model, it also includes multiple first screws and multiple second screws. The first pressure plate is detachably fixed to the first side of the bottom plate or the top plate by the first screws, and the second pressure plate is detachably fixed to the second side of the bottom plate or the top plate by the second screws.

[0013] According to one embodiment of the utility model, the bottom plate, the top plate and the heat exchange plate are all provided with a cold water inlet, a cold water outlet, a hot water inlet and a hot water outlet, a plurality of cold water chambers are interconnected through the cold water inlet and the cold water outlet, and a plurality of hot water chambers are interconnected through the hot water inlet and the hot water outlet.

[0014] According to one embodiment of the utility model, the first cleaning sewage outlet and the second cleaning sewage outlet are both long strip holes.

[0015] The utility model also discloses a water heater, comprising the plate heat exchanger mentioned above.

[0016] An embodiment of the present invention has the following advantages or beneficial effects:

[0017] The utility model discloses a plate heat exchanger, which includes a heat exchange plate assembly and a pressure plate assembly. The heat exchange plate assembly is surrounded by a plurality of cold water chambers and a plurality of hot water chambers that are interconnected. The cold water chambers and the hot water chambers are arranged alternately. A first cleaning drain outlet is provided on a first side of the heat exchange plate assembly corresponding to each cold water chamber, and a second cleaning drain outlet is provided on a second side of the heat exchange plate assembly corresponding to each hot water chamber. The pressure plate assembly includes a first pressure plate, a second pressure plate, a first sealing gasket and a second sealing gasket. The first pressure plate is detachably fixed to the first side of the heat exchange plate assembly, the first sealing gasket is located between the first pressure plate and the heat exchange plate assembly, and the first sealing gasket is configured to block the first cleaning drain outlet. The second pressure plate is detachably fixed to the second side of the heat exchange plate assembly, the second sealing gasket is located between the second pressure plate and the heat exchange plate assembly, and the second sealing gasket is configured to block the second cleaning drain outlet. Maintenance personnel only need to remove the pressure plate assembly to see the inside of the cold water chamber and the hot water chamber, brush off the scale on the chamber wall with a brush or other tools, and then clear the scale from the cleaning drain port, and then install the pressure plate assembly on the heat exchanger plate assembly to facilitate cleaning, improve the heat conduction of the chamber wall, avoid the plate heat exchanger being blocked by scale and having to be replaced with a new heat exchanger, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0019] Figure 1 is an exploded view of a plate heat exchanger according to an exemplary embodiment.

[0020] Figure 2 is a perspective view of a plate heat exchanger according to an exemplary embodiment.

[0021] Figure 3 is a perspective view of a heat exchange plate assembly according to an exemplary embodiment.

[0022] Figure 4 is another perspective view of a heat exchange plate assembly according to an exemplary embodiment.

[0023] Figure 5 yes Figure 1 Enlarged view of part A.

[0024] The reference numerals are described as follows:

[0025] 1. Heat exchange plate assembly; 11. First cleaning drain outlet; 12. Second cleaning drain outlet; 13. Bottom plate; 131. Cold water inlet; 132. Cold water outlet; 133. Hot water inlet; 134. Hot water outlet; 135. Threaded hole; 14. Top plate; 15. Heat exchange plate; 151. Annular flange; 2. Press plate assembly; 21. First press plate; 211. First connecting part; 2111. Hanging hole; 212. Third connecting part; 213. Fourth connecting part; 22. Second press plate; 221. Second connecting part; 2211. Hook; 222. Fifth connecting part; 223. Sixth connecting part; 23. First sealing gasket; 24. Second sealing gasket; 3. First screw; 4. Second screw. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0027] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0028] like Figure 1-5 As shown, a plate heat exchanger according to an embodiment of the utility model comprises a heat exchange plate assembly 1 and a pressure plate assembly 2 .

[0029] The heat exchange plate assembly 1 is surrounded by a plurality of interconnected cold water chambers and a plurality of interconnected hot water chambers, the cold water chambers and the hot water chambers are arranged alternately, and the cold water chambers and the hot water chambers are not connected.

[0030] The hot water heats the wall panels on both sides of the hot water chamber, and the wall panels on both sides of the hot water chamber are part of the surrounding cold water chamber. Under the action of heat conduction, the water in the cold water chamber is heated to achieve a heat exchange function.

[0031] A first cleaning drain port 11 is provided at a first side of the heat exchange plate assembly 1 corresponding to each cold water cavity, and a second cleaning drain port 12 is provided at a second side of the heat exchange plate assembly 1 corresponding to each hot water cavity.

[0032] The pressure plate assembly 2 includes a first pressure plate 21 , a second pressure plate 22 , a first sealing gasket 23 and a second sealing gasket 24 .

[0033] The first pressing plate 21 is detachably fixed to the first side of the heat exchange plate assembly 1. The first sealing gasket 23 is located between the first pressing plate 21 and the heat exchange plate assembly 1. The first sealing gasket 23 is configured to block the first cleaning drain outlet 11 to prevent water from overflowing during normal use.

[0034] The second pressing plate 22 is detachably fixed to the second side of the heat exchange plate assembly 1. The second sealing gasket 24 is located between the second pressing plate 22 and the heat exchange plate assembly 1. The second sealing gasket 24 is configured to block the second cleaning drain outlet 12 to prevent water from overflowing during normal use.

[0035] The sizes of the first sealing gasket 23 and the second sealing gasket 24 are larger than the opening sizes of the first cleaning sewage outlet 11 and the second cleaning sewage outlet 12 .

[0036] The sizes of the first pressing plate 21 and the second pressing plate 22 are larger than the sizes of the first sealing gasket 23 and the second sealing gasket 24 .

[0037] The first cleaning sewage outlet 11 and the second cleaning sewage outlet 12 are both long strip holes, and the size of the long strip holes can allow a brush or a steel brush to extend into and perform cleaning operations.

[0038] A plate heat exchanger of the utility model embodiment has a heat exchange plate assembly 1 of a plate heat exchanger with dedicated first cleaning drain outlets 11 and second cleaning drain outlets 12 on both sides corresponding to the cold water chamber and the hot water chamber respectively. The maintenance personnel only need to remove the pressure plate assembly 2 to see the inside of the cold water chamber and the hot water chamber, brush off the scale on the cavity wall with a brush or other tools, and then clean the scale away from the cleaning drain outlet, and then install the pressure plate assembly 2 on the heat exchange plate assembly 1, so as to facilitate cleaning, improve the heat conduction of the cavity wall, avoid the plate heat exchanger being blocked by scale and having to be replaced with a new heat exchanger, and reduce the use cost.

[0039] like Figure 1 , 2 As shown, in a preferred embodiment of the utility model, the first pressure plate 21 is provided with a first connecting portion 211, and the second pressure plate 22 is provided with a second connecting portion 221 corresponding to the first connecting portion 211, and the second connecting portion 221 is detachably connected to the first connecting portion 211, thereby improving the pressing effect of the first pressure plate 21 and the second pressure plate 22 on the first sealing gasket 23 and the second sealing gasket 24 respectively, thereby improving the sealing performance of the plugging.

[0040] like Figure 1 , 2 As shown, in a preferred embodiment of the present invention, the first connecting portion 211 is a first folded portion at one end of the first pressure plate 21, the first folded portion is located on the front or back of the heat exchange plate assembly 1, and a hanging hole 2111 is provided at one end of the first folded portion.

[0041] The second connection portion 221 is a second folded portion at one end of the second pressing plate 22 . A hook 2211 is disposed at one end of the second folded portion, and the hook 2211 is hung with the hanging hole 2111 .

[0042] During installation, the hook 2211 is first connected to the hanging hole 2111, and then the first pressing plate 21 and the second pressing plate 22 are respectively fixed to the two sides of the heat exchange plate assembly 1, so as to facilitate disassembly and assembly and improve cleaning efficiency.

[0043] For example, Figure 2 As shown, the first folding portion and the second folding portion are located on the front side of the heat exchange plate assembly 1, and the fixing positions of the first pressure plate 21 and the second pressure plate 22 and the heat exchange plate assembly 1 are close to the back side of the heat exchange plate assembly 1. The tighter the first pressure plate 21 and the second pressure plate 22 are fixed to the heat exchange plate assembly 1, the greater the hanging tension between the hook 2211 and the hanging hole 2111, and the greater the clamping force.

[0044] Preferably, there are multiple hooks 2211 and multiple hanging holes 2111 to achieve uniform compression of the first sealing gasket 23 and the second sealing gasket 24 .

[0045] like Figure 1 , 2 As shown, in a preferred embodiment of the present invention, a third connecting portion 212 and a fourth connecting portion 213 are respectively provided at two ends of the first pressing plate 21 .

[0046] The second pressing plate 22 is provided with a fifth connecting portion 222 and a sixth connecting portion 223 at two ends thereof corresponding to the third connecting portion 212 and the fourth connecting portion 213 , respectively.

[0047] The fifth connection part 222 is detachably connected to the third connection part 212 , and the sixth connection part 223 is detachably connected to the fourth connection part 213 , so as to realize annular compression and uniform compression of the first sealing gasket 23 and the second sealing gasket 24 .

[0048] In a preferred embodiment of the present invention, the cross-sections of the first pressing plate 21 and the second pressing plate 22 are both C-shaped, and the third connecting portion 212 and the fourth connecting portion 213 are located at two ends of the cross-section of the first pressing plate 21 .

[0049] The longitudinal sections of the first pressing plate 21 and the second pressing plate 22 are both L-shaped. The vertical portion of the longitudinal section of the first pressing plate 21 is a main pressing surface, and the first folded portion is a transverse portion of the longitudinal section of the first pressing plate 21 .

[0050] In a preferred embodiment of the present invention, the heat exchange plate assembly 1 includes a bottom plate 13, a top plate 14 and a plurality of heat exchange plates 15, the cold water chamber and the hot water chamber are formed by the plurality of heat exchange plates 15, and the plurality of heat exchange plates 15 are fixed between the bottom plate 13 and the top plate 14.

[0051] like Figure 5 As shown, the edge of the heat exchange plate 15 has an annular flange 151 , which is the annular side wall of the cold water cavity or the hot water cavity. The first cleaning drain port 11 and the second cleaning drain port 12 are both located on the annular flange 151 of the heat exchange plate 15 .

[0052] The heat exchange plate 15, the bottom plate 13 and the top plate 14 are welded together. Of course, it is not limited to welding, and they can also be formed as one piece. Those skilled in the art can select the manufacturing method of the heat exchange plate assembly 1 according to actual needs.

[0053] like Figure 1-4 As shown, in a preferred embodiment of the present utility model, a plurality of first screws 3 and a plurality of second screws 4 are also included.

[0054] The first pressing plate 21 is detachably fixed to a first side of the bottom plate 13 or the top plate 14 by means of a first screw 3 , and the second pressing plate 22 is detachably fixed to a second side of the bottom plate 13 or the top plate 14 by means of a second screw 4 .

[0055] like Figure 3 , 4 As shown, at least two threaded holes 135 are provided on both sides of the bottom plate 13, and a through hole is provided on the first pressure plate 21 corresponding to the threaded hole 135. One end of the first screw 3 passes through the through hole of the first pressure plate 21 and is connected to the threaded hole 135. The threaded cap at the other end of the first screw 3 presses the first pressure plate 21 onto one side of the heat exchange plate assembly 1 to fix the first pressure plate 21.

[0056] One end of the second screw 4 passes through the through hole of the second pressing plate 22 and is connected to the threaded hole 135 , and the threaded cap at the other end of the second screw 4 presses the second pressing plate 22 onto the other side of the heat exchange plate assembly 1 to fix the second pressing plate 22 .

[0057] like Figure 1-4 As shown, in a preferred embodiment of the present utility model, the bottom plate 13, the top plate 14 and the heat exchange plate 15 are all provided with a cold water inlet 131, a cold water outlet 132, a hot water inlet 133 and a hot water outlet 134, a plurality of cold water chambers are interconnected through the cold water inlet 131 and the cold water outlet 132, and a plurality of hot water chambers are interconnected through the hot water inlet 133 and the hot water outlet 134.

[0058] The cold water flows through each cold water chamber in turn through the baffle flow, and the hot water flows through each hot water chamber in turn through the baffle flow, thereby improving the working efficiency of the heat exchanger.

[0059] In a preferred embodiment of the present invention, the length of the elongated hole is 50-90% of the length of the heat exchange plate 15 .

[0060] The utility model also discloses a water heater, including the above-mentioned plate heat exchanger. The water heater of the utility model adopts the above-mentioned plate heat exchanger, which is easy to clean, improves the heat conduction of the cavity wall, avoids the plate heat exchanger being blocked by scale and has to be replaced with a new heat exchanger, thereby reducing the use cost.

[0061] In the embodiments of the present invention, the term "multiple" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0062] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0063] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate heat exchanger, characterized in that: include: A heat exchange plate assembly (1) is provided with a plurality of interconnected cold water chambers and a plurality of interconnected hot water chambers, the cold water chambers and the hot water chambers being arranged alternately, a first cleaning and draining port (11) is provided at a first side of the heat exchange plate assembly (1) corresponding to a position of each of the cold water chambers, and a second cleaning and draining port (12) is provided at a second side of the heat exchange plate assembly (1) corresponding to a position of each of the hot water chambers. A pressure plate assembly (2), the pressure plate assembly (2) comprising a first pressure plate (21), a second pressure plate (22), a first sealing gasket (23) and a second sealing gasket (24), the first pressure plate (21) being detachably fixed to a first side of the heat exchange plate assembly (1), the first sealing gasket (23) being located between the first pressure plate (21) and the heat exchange plate assembly (1), the first sealing gasket (23) being configured to block the first cleaning drain outlet (11), the second pressure plate (22) being detachably fixed to a second side of the heat exchange plate assembly (1), the second sealing gasket (24) being located between the second pressure plate (22) and the heat exchange plate assembly (1), the second sealing gasket (24) being configured to block the second cleaning drain outlet (12).

2. The plate heat exchanger according to claim 1, characterized in that: The first pressing plate (21) is provided with a first connecting portion (211), and the second pressing plate (22) is provided with a second connecting portion (221) corresponding to the first connecting portion (211), and the second connecting portion (221) is detachably connected to the first connecting portion (211).

3. The plate heat exchanger according to claim 2, characterized in that: The first connection part (211) is a first folded part at one end of the first pressure plate (21), the first folded part is located on the front side or the back side of the heat exchange plate assembly (1), a hanging hole (2111) is provided at one end of the first folded part, and the second connection part (221) is a second folded part at one end of the second pressure plate (22), a hook (2211) is provided at one end of the second folded part, and the hook (2211) is hung on the hanging hole (2111).

4. The plate heat exchanger according to claim 2, characterized in that: The first pressing plate (21) is provided with a third connecting portion (212) and a fourth connecting portion (213) at both ends, respectively; the second pressing plate (22) is provided with a fifth connecting portion (222) and a sixth connecting portion (223) at both ends corresponding to the third connecting portion (212) and the fourth connecting portion (213), respectively; the fifth connecting portion (222) is detachably connected to the third connecting portion (212), and the sixth connecting portion (223) is detachably connected to the fourth connecting portion (213).

5. The plate heat exchanger according to claim 4, characterized in that: The cross-sections of the first pressing plate (21) and the second pressing plate (22) are both C-shaped, and the longitudinal sections of the first pressing plate (21) and the second pressing plate (22) are both L-shaped.

6. The plate heat exchanger according to claim 1, characterized in that: The heat exchange plate assembly (1) comprises a bottom plate (13), a top plate (14) and a plurality of heat exchange plates (15); the cold water chamber and the hot water chamber are formed by the plurality of heat exchange plates (15); the plurality of heat exchange plates (15) are fixed between the bottom plate (13) and the top plate (14); the edges of the heat exchange plates (15) have an annular flange (151); and the first cleaning sewage outlet (11) and the second cleaning sewage outlet (12) are both located on the annular flange (151).

7. The plate heat exchanger according to claim 6, characterized in that: It also includes a plurality of first screws (3) and a plurality of second screws (4), wherein the first pressing plate (21) is detachably fixed to the first side of the bottom plate (13) or the top plate (14) by means of the first screws (3), and the second pressing plate (22) is detachably fixed to the second side of the bottom plate (13) or the top plate (14) by means of the second screws (4).

8. The plate heat exchanger according to claim 6, characterized in that: The bottom plate (13), the top plate (14) and the heat exchange plate (15) are all provided with a cold water inlet (131), a cold water outlet (132), a hot water inlet (133) and a hot water outlet (134); a plurality of the cold water chambers are interconnected via the cold water inlet (131) and the cold water outlet (132); a plurality of the hot water chambers are interconnected via the hot water inlet (133) and the hot water outlet (134).

9. The plate heat exchanger according to any one of claims 1 to 8, characterized in that: The first cleaning sewage outlet (11) and the second cleaning sewage outlet (12) are both long strip holes.

10. A water heater, characterized in that: A plate heat exchanger comprising any one of claims 1-9.

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