Plate heat exchanger of air source heat pump

Abstract

The utility model relates to the technical field of air source heat pumps, in particular to a plate heat exchanger of an air source heat pump, which is characterized in that a top plate is fixed at the top of a plate heat exchanger body, three liquid cylinders are transversely fixed at the rear end of the top plate, and liquid outlets arranged at the bottom ends of the front walls of the liquid cylinders are respectively sleeved with connecting pipes; the liquid changing mechanism comprises an outer cylinder fixed to the top plate, an inner cylinder rotationally sleeved with the outer cylinder, a plug fixed to one end of the outer cylinder and a rotating wheel, a pipe head connected with the front end of the connecting pipe in a sleeved mode is arranged on the rear wall of the outer cylinder, and three staggered through holes are formed in the circumferential wall, corresponding to the pipe head, of the inner cylinder. A sleeve sleeving the center of the plug is sleeved with the input end of the liquid pump, a flushing pipe is connected between one end of the middle of a liquid inlet tee joint connected between the water inlet pipe and the water inlet valve and the output end of the liquid pump, and one end of the middle of a liquid outlet tee joint connected between the water outlet pipe and the water outlet valve is connected with a blow-down valve; the problem that the plate heat exchanger of the air source heat pump is inconvenient to clean efficiently is well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of air source heat pumps, in particular to an air source heat pump plate heat exchanger. Background Art

[0002] Air source heat pump is an energy-saving device that uses high-level energy to make heat flow from low-level heat source air to high-level heat source. It mainly consists of two parts: air source heat pump circulation system and water storage tank. Air source heat pump water heater is a device that transfers heat from the air to water to produce hot water by consuming part of the electrical energy. Among them, plate heat exchangers are often used in air source heat pumps to heat cold water to achieve hot water supply.

[0003] Traditionally, a plate heat exchanger is a high-efficiency heat exchanger made of a series of stacked metal sheets with a certain corrugated shape. Thin rectangular channels are formed between the various plates, and heat is exchanged through the plates. The plate heat exchanger is an ideal equipment for liquid-liquid and liquid-steam heat exchange.

[0004] After long-term use, the plate heat exchanger of the air source heat pump will form scale on the heat exchange surface of the plate, which will hinder heat exchange and cause the heat transfer rate of the plate heat exchanger to decrease. Traditionally, the heat exchanger needs to be manually disassembled and the plates removed for scale cleaning. The disassembly process is complicated and tedious. At the same time, multiple disassembly of the heat exchanger will cause seal failure and damage to the heat exchanger, thereby reducing the service life of the heat exchanger. Utility Model Content

[0005] The utility model aims to provide an air source heat pump plate heat exchanger, which is used to solve the problem that the current air source heat pump plate heat exchanger is not convenient for efficient cleaning.

[0006] To achieve the above object, the present utility model provides the following technical solution: An air source heat pump plate heat exchanger, including a plate heat exchanger body disposed inside an air source heat pump water heater unit. At the top and bottom ends on one side of the front wall of the plate heat exchanger body, a water inlet pipe and a water outlet pipe are respectively provided. At the front ends of the water inlet pipe and the water outlet pipe, a water inlet valve and a water outlet valve are respectively provided. The top plate is fixed to the top of the plate heat exchanger body. There are three liquid cylinders, and the three liquid cylinders are horizontally fixed to the rear end of the top surface of the top plate. At the bottom end of the front wall of the liquid cylinder, a liquid outlet is respectively provided. The rear end of the connecting pipe is inserted into the liquid outlet. The liquid changing mechanism includes an outer cylinder horizontally fixed to the front side of the middle of the top surface of the top plate, an inner cylinder rotatably sleeved inside the inner cavity of the outer cylinder, a plug fixed to one end of the outer cylinder, and a runner rotatably sleeved at the center of the other end surface of the outer cylinder and fixed to the corresponding end of the inner cylinder. On the rear wall of the outer cylinder, pipe heads respectively sleeved and matched with the front ends of the connecting pipes are provided. On the circumferential wall of the inner cylinder corresponding to the pipe heads, three mutually staggered through holes are provided. A sleeve is sleeved at the center of the plug. The liquid pump is fixed to the position on the top plate corresponding to the plug. The sleeve is sleeved with the input end of the liquid pump. The inlet liquid three-way is connected between the water inlet pipe and the water inlet valve. A flushing pipe is connected between one end of the middle part of the inlet liquid three-way and the output end of the liquid pump. The outlet liquid three-way is connected between the water outlet pipe and the water outlet valve. One end of the middle part of the outlet liquid three-way is connected with a sewage discharge valve.

[0007] Preferably, the plate heat exchanger body includes a back plate and a front panel arranged in parallel, and a plurality of flow channel plates sandwiched between the back plate and the front panel. The water inlet pipe and the water outlet pipe are respectively arranged at the top and bottom ends on one side of the front wall of the front panel. At the top and bottom ends on the other side of the front wall of the front panel, a medium inlet and a medium outlet are respectively provided.

[0008] Preferably, a connecting frame fixedly connected with a fixing frame of the air source heat pump water heater unit is provided on the rear wall of the back plate. The rear end of the top plate is fixedly connected with the top end of the back plate by bolts, and the front end of the top plate is supported on the top end of the front panel.

[0009] Preferably, at the center of one end surface of the outer cylinder corresponding to the runner, a sleeve hole rotatably sleeved and matched with the middle rod body of the runner is provided. A threaded rod is fixedly butted at the inner end of the middle rod body of the runner. A connecting hole threadedly sleeved and matched with the threaded rod is provided on the end surface of the inner cylinder.

[0010] Preferably, detachable top covers are respectively provided on the top surfaces of the liquid cylinders at both sides of the rear end of the top surface of the top plate, and a water inlet joint is provided on the top surface of the liquid cylinder at the middle of the rear end of the top surface of the top plate.

[0011] Compared with the prior art, the beneficial effects of the present utility model are:

[0012] The air source heat pump plate heat exchanger involved in the utility model is respectively provided with acidic cleaning liquid and alkaline cleaning liquid in the liquid cylinders on both sides above the plate heat exchanger body, and the liquid cylinder in the middle serves as a clean water buffer storage container. The acidic cleaning liquid, clean water and alkaline cleaning liquid can be respectively communicated with the input end of the liquid pump through a liquid changing mechanism, so as to realize efficient cleaning of the heat exchanger plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the whole utility model;

[0014] Figure 2 It is a three-dimensional structural schematic diagram of the plate heat exchanger body of the utility model;

[0015] Figure 3 It is a three-dimensional structural schematic diagram of the liquid changing mechanism of the utility model.

[0016] In the figure: 1 - plate heat exchanger body; 1.1 - back plate; 1.2 - front panel; 1.3 - flow channel plate; 1.4 - water inlet pipe; 1.5 - water outlet pipe; 1.6 - medium inlet;

[0017] 1.7 - medium outlet; 1.8 - connecting frame;

[0018] 2 - top plate;

[0019] 3 - liquid cylinder; 3.1 - top cover; 3.2 - water inlet joint; 3.3 - liquid outlet;

[0020] 4 - connecting pipe;

[0021] 5 - liquid pump;

[0022] 6 - liquid changing mechanism; 6.1 - outer cylinder; 6.1.1 - sleeve hole; 6.1.2 - pipe head; 6.2 - inner cylinder; 6.2.1 - connecting hole; 6.2.2 - through hole;

[0023] 6.3 - plug; 6.3.1 - sleeve; 6.4 - runner; 6.4.1 - threaded rod;

[0024] 7 - flushing pipe;

[0025] 8 - liquid inlet tee;

[0026] 9 - water inlet valve;

[0027] 10 - liquid outlet tee;

[0028] 11 - water outlet valve;

[0029] 12 - sewage discharge valve. DETAILED IMPLEMENTATION MANNER

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1-3 , the present invention provides a technical solution: an air source heat pump plate heat exchanger, which includes a plate heat exchanger body 1 disposed in an air source heat pump water heater unit. The top and bottom ends of one side of the front wall of the plate heat exchanger body 1 are respectively provided with a water inlet pipe 1.4 and a water outlet pipe 1.5. The front ends of the water inlet pipe 1.4 and the water outlet pipe 1.5 are respectively provided with a water inlet valve 9 and a water outlet valve 11. Among them, the plate heat exchanger body 1 includes a back plate 1.1 and a front panel 1.2 arranged in parallel, and a plurality of flow channel plates 1.3 sandwiched between the back plate 1.1 and the front panel 1.2. The water inlet pipe 1.4 and the water outlet pipe 1.5 are respectively disposed at the top and bottom ends of one side of the front wall of the front panel 1.2, and the top and bottom ends of the other side of the front wall of the front panel 1.2 are respectively provided with a medium inlet 1.6 and a medium outlet 1.7. In order to facilitate the fixed installation of the plate heat exchanger body 1, a connecting frame 1.8 fixedly connected to the fixed frame of the air source heat pump water heater unit is provided on the rear wall of the back plate 1.1.

[0032] The top plate 2 is fixed to the top of the plate heat exchanger body 1. Among them, the rear end of the top plate 2 is fixedly connected to the top end of the back plate 1.1 by bolts, and the front end of the top plate 2 is supported on the top end of the front panel 1.2.

[0033] There are three liquid cylinders 3, and the three liquid cylinders 3 are fixed to the rear end of the top surface of the top plate 2 horizontally. The bottom ends of the front walls of the liquid cylinders 3 are respectively provided with liquid outlets 3.3. Among them, detachable top covers 3.1 are respectively provided on the top surfaces of the liquid cylinders 3 on both sides of the rear end of the top surface of the top plate 2, and a water inlet joint 3.2 is provided on the top surface of the liquid cylinder 3 in the middle of the rear end of the top surface of the top plate 2. That is, by opening the top cover 3.1, acidic cleaning liquid and alkaline inclined liquid are respectively filled into the two side liquid cylinders 3, and the water inlet joint 3.2 is directly connected to the clear water pipeline, and the middle liquid cylinder 3 serves as a clear water buffer solution.

[0034] The rear ends of the connecting pipes 4 are respectively inserted into the liquid outlets 3.3.

[0035] The liquid changing mechanism 6 includes an outer cylinder body 6.1 fixed to the front side of the middle part of the top surface of the top plate 2 along the transverse direction, an inner cylinder body 6.2 rotatably sleeved in the inner cavity of the outer cylinder body 6.1, a plug 6.3 fixedly sleeved at one end of the outer cylinder body 6.1, and a runner 6.4 rotatably sleeved at the center of the other end surface of the outer cylinder body 6.1 and fixed to the corresponding end of the inner cylinder body 6.2. Pipe heads 6.1.2 that are sleeved and matched with the front end of the connecting pipe 4 are respectively provided on the rear wall of the outer cylinder body 6.1. Three mutually staggered through holes 6.2.2 are provided on the peripheral wall of the inner cylinder body 6.2 corresponding to the pipe heads 6.1.2. A sleeve 6.3.1 is sleeved at the center of the plug 6.3. Among them, a socket hole 6.1.1 that is rotatably sleeved and matched with the middle rod body of the runner 6.4 is provided at the center of one end surface of the outer cylinder body 6.1 corresponding to the runner 6.4. A threaded rod 6.4.1 is fixedly butted at the inner end of the middle rod body of the runner 6.4. A connecting hole 6.2.1 that is threadedly sleeved and matched with the threaded rod 6.4.1 is provided on the end surface of the inner cylinder body 6.2. That is, by rotating the runner 6.4, the inner cylinder body 6.2 can be rotated relative to the outer cylinder body 6.1, so that one of the through holes 6.2.2 can be respectively communicated with the acidic cleaning liquid output channel, the clear water output channel or the alkaline cleaning liquid output channel.

[0036] The liquid pump 5 is fixed at the position on the top plate 2 corresponding to the plug 6.3, and the sleeve 6.3.1 is sleeved with the input end of the liquid pump 5.

[0037] The liquid inlet three-way joint 8 is connected between the water inlet pipe 1.4 and the water inlet valve 9, and a flushing pipe 7 is connected between one end of the middle part of the liquid inlet three-way joint 8 and the output end of the liquid pump 5.

[0038] The liquid outlet three-way joint 10 is connected between the water outlet pipe 1.5 and the water outlet valve 11, and a sewage discharge valve 12 is connected to one end of the middle part of the liquid outlet three-way joint 10.

[0039] In summary, when it is necessary to clean the hot water flow channel of the flow channel plate 1.3, first close the water inlet valve 9 and the water outlet valve 11, and at the same time open the sewage discharge valve 12.

[0040] First, rotate the inner cylinder body by rotating the runner 6.4 so that the through hole 6.2.2 corresponding to the acidic cleaning agent liquid cylinder 3 rotates to face the pipe head 6.1.2. At this time, the liquid cylinder 3 storing the acidic cleaning agent is communicated with the inner cylinder body 6.2 through the liquid outlet 3.3 at its bottom, the connecting pipe 4, the pipe head 6.1.2, and the corresponding through hole 6.2.2. At this time, turn on the liquid pump 5, and the acidic cleaning agent can be pumped and enter the hot water flow channel through the flushing pipe 7, the liquid inlet three-way joint 8, and the water inlet pipe 1.4, and then be discharged from the water outlet pipe 1.5, the liquid outlet three-way joint 10, and the sewage discharge valve 12, so as to complete the acid cleaning of the flow channel plate 1.3.

[0041] Then, rotate the runner 6.4 so that the middle liquid cylinder 3 is communicated with the input end of the liquid pump 5 to realize the clear water flushing of the flow channel plate 1.3 and remove the residual acid liquid in the channel.

[0042] Rotate the runner 6.4 again to connect the liquid cylinder 3 storing the alkaline cleaning agent with the input end of the liquid pump 5, so as to realize the alkaline cleaning of the flow channel plate 1.3.

[0043] Finally, rotate the runner 6.4 to connect the liquid cylinder 3 in the middle with the input end of the liquid pump 5 again, so as to realize the flushing of the flow channel plate 1.3 with clean water and remove the residual alkaline liquid in the channel.

[0044] Close the sewage discharge valve 12, open the water inlet valve 9 and the water outlet valve 11 at the same time, and close the liquid pump 5, then the normal heat exchange application of the plate heat exchanger body 1 can be realized.

[0045] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0046] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An air source heat pump plate heat exchanger, comprising a plate heat exchanger body (1) disposed in an air source heat pump water heater unit. At the top and bottom ends on one side of the front wall of the plate heat exchanger body (1), a water inlet pipe (1.4) and a water outlet pipe (1.5) are respectively provided. Water inlet valves (9) and water outlet valves (11) are respectively provided corresponding to the front ends of the water inlet pipe (1.4) and the water outlet pipe (1.5). It is characterized in that, Further included are: A top plate (2), which is fixed to the top of the plate heat exchanger body (1); Three liquid cylinders (3), which are fixed to the rear end of the top surface of the top plate (2) in the transverse direction, and liquid outlets (3.3) are respectively arranged at the bottom ends of the front walls of the liquid cylinders (3); A connecting pipe (4), the rear end of which is inserted into the liquid outlet (3.3); A liquid changing mechanism (6), which includes an outer cylinder body (6.1) fixed to the front side of the middle part of the top surface of the top plate (2) in the transverse direction, an inner cylinder body (6.2) rotatably sleeved in the inner cavity of the outer cylinder body (6.1), a plug (6.3) fixedly sleeved at one end of the outer cylinder body (6.1), and a runner (6.4) rotatably sleeved at the center of the other end surface of the outer cylinder body (6.1) and fixed to the corresponding end of the inner cylinder body (6.2). Pipe heads ( 6.1.2) that are respectively arranged on the rear wall of the outer cylinder body (6.1) and are sleeved and matched with the front ends of the connecting pipes (4). Three through holes (6.2.2) that are staggered from each other are arranged on the peripheral wall of the inner cylinder body (6.2) corresponding to the pipe heads (6.1.2). A sleeve (6.3.1) is sleeved in the center of the plug (6.3); A liquid pump (5), which is fixed at a position on the top plate (2) corresponding to the plug (6.3), and the sleeve (6.3.1) is sleeved with the input end of the liquid pump (5); An inlet liquid three-way joint (8), which is connected between the inlet water pipe (1.4) and the inlet water valve (9). A flushing pipe (7) is connected between one end in the middle of the inlet liquid three-way joint (8) and the output end of the liquid pump (5); An outlet liquid three-way joint (10), which is connected between the outlet water pipe (1.5) and the outlet water valve (11). A sewage discharge valve (12) is connected to one end in the middle of the outlet liquid three-way joint (10).

2. The plate heat exchanger of an air source heat pump according to claim 1, characterized in that: The plate heat exchanger body (1) includes a back plate (1.1) and a front plate (1.2) arranged in parallel, and a plurality of flow channel plates (1.3) clamped between the back plate (1.1) and the front plate (1.2). The inlet water pipe (1.4) and the outlet water pipe (1.5) are respectively arranged at the top and bottom ends on one side of the front wall of the front plate (1.2). A medium inlet (1.6) and a medium outlet (1.7) are respectively arranged at the top and bottom ends on the other side of the front wall of the front plate (1.2).

3. The plate heat exchanger of an air source heat pump according to claim 2, wherein: A connecting frame (1.8) for fixedly connecting with the fixing frame of the air source heat pump water heater is arranged on the rear wall of the back plate (1.1). The rear end of the top plate (2) is fixedly connected with the top end of the back plate (1.1) by bolts, and the front end of the top plate (2) is supported on the top end of the front plate (1.2).

4. The plate heat exchanger of an air source heat pump according to claim 1, characterized in that: A socket hole ( 6.1.1), a threaded rod (6.4.1) is fixedly butted at the inner end of the middle rod body of the runner (6.4), and a connection hole (6.2.1) that is threadedly sleeved and matched with the threaded rod (6.4.1) is provided on the end face of the inner cylinder body (6.2).

5. The plate heat exchanger of an air source heat pump according to claim 1, characterized in that: Removable top covers (3.1) are respectively provided on the top surfaces of the liquid cylinders (3) on both sides at the rear end of the top surface of the top plate (2), and a water inlet joint (3.2) is provided on the top surface of the liquid cylinder (3) in the middle at the rear end of the top surface of the top plate (2).

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