Heat pump water storage type water heater

Abstract

The invention discloses a heat pump water storage type water heater, and relates to the technical field of heat pump heating, the heat pump water storage type water heater comprises a water storage tank and a heat exchange assembly, and further comprises a partition plate assembly and a cold and hot mixing assembly, the partition plate assembly is longitudinally arranged in the water storage tank in a sliding mode, and the partition plate assembly divides the interior of the water storage tank into an upper heat preservation cavity and a lower heat preservation cavity; communicating holes are uniformly formed in the partition plate assembly in a penetrating mode, a blocking structure used for blocking the communicating holes is arranged on the partition plate assembly, and a water outlet pipe communicated with the upper heat preservation cavity is further arranged on the water storage tank. Based on the partition plate assembly and the cold and hot mixing assembly, after hot water heated by the heat pump enters the water storage tank, fluctuation of water flow can be reduced, layering and zoning of cold and hot water are achieved, the temperature of hot water taken by a user is remarkably increased, and therefore the user can blend hot water at different temperatures according to needs, and the hot water dispenser has the advantages of being simple in structure, low in cost and convenient to use. The operation is convenient, and the practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of heat pump heating, in particular to a heat pump water storage type water heater. Background Art

[0002] A heat pump is a water heater that uses the energy in the air to generate heat. It can provide a large amount of water, high water pressure and constant temperature to meet the different hot water needs of the whole family 24 hours a day, while consuming the least energy to meet the above requirements.

[0003] In the prior art, the heat pump storage water heater needs to be continuously replenished with cold water when in use, that is, cold water enters the inner tank before hot water can flow out. However, there is a disadvantage that even if the whole tank is filled with 75°C hot water, once cold water enters, it quickly merges with the hot water and will quickly lower the water temperature. In addition, the cold water replenished by the heat pump storage water heater mixes quickly with the original hot water in the water tank. In this way, when in use, although it is always heated, the water temperature in the tank also drops quickly, causing large fluctuations in the outlet water temperature, affecting use. Summary of the invention

[0004] The object of the present invention is to provide a heat pump storage water heater to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme: A heat pump water storage type water heater provided by the present invention comprises a water storage tank and a heat exchange component, and also comprises a partition plate component and a cold and hot mixing component, wherein the partition plate component is longitudinally slidably arranged in the water storage tank, and the partition plate component divides the inner cavity of the water storage tank into an upper heat preservation cavity and a lower heat preservation cavity, the partition plate component is evenly penetrated with connecting holes, the partition plate component is provided with a plugging structure for plugging the connecting holes, and the water storage tank is also provided with a water outlet pipe connected with the upper heat preservation cavity; The hot and cold mixing assembly includes a mixing chamber, two liquid inlet pipes connected to the mixing chamber, and a liquid outlet pipe connected to the mixing chamber, the end of the liquid outlet pipe away from the mixing chamber is connected to the input end of the heat exchange assembly, the two liquid inlet pipes are respectively a first liquid inlet pipe and a second liquid inlet pipe, the end of the first liquid inlet pipe away from the mixing chamber is connected to the bottom of the lower insulation chamber, and a one-way solenoid valve is provided on the first liquid inlet pipe, the end of the second liquid inlet pipe away from the mixing chamber is connected to the water inlet pipe, the end of the liquid outlet pipe away from the mixing chamber is connected to the input end of the heat exchange assembly, and the output end of the heat exchange assembly is connected to the upper insulation chamber of the water storage tank through a connecting pipe.

[0006] Furthermore, the cross-section of the water tank is non-circular, the partition plate assembly includes a plate body, the outer wall of the plate body is tightly attached to the inner wall of the water tank, a circular groove is opened on the top of the plate body, and the connecting holes are evenly arranged in the circular groove area of ​​the plate body.

[0007] Furthermore, the plate body is made of a high temperature resistant low density material, and the interior of the plate body is hollow to form a weight reduction cavity.

[0008] Furthermore, the sealing structure includes a sealing plate rotatably arranged in a circular groove, and the shape of the sealing plate is adapted to the circular groove so that the outer wall of the sealing plate is tightly attached to the inner wall of the circular groove, and the top of the sealing plate is also provided with a pressure ring pressed on the outer edge of the sealing plate, and an adaptation hole is provided on the sealing plate corresponding to the connecting hole. The sealing structure also includes a driving member for driving the sealing plate to rotate around its center line between a first angle and a second angle, when the sealing plate is at the first angle, the adaptation hole of the sealing plate coincides with the connecting hole, and when the sealing plate is at the second angle, the adaptation hole of the sealing plate is completely staggered with the connecting hole.

[0009] Furthermore, the driving member includes a driving shaft, the top end of the driving shaft passes through the center of the plate body and the sealing plate and is fixed with a limiting cylinder, a strip-shaped groove is opened on the outer side of the driving shaft along its length direction, and a block is provided on the sealing plate to be inserted into the strip-shaped groove, and the bottom end of the driving shaft is connected to a driving source for driving the driving shaft to rotate.

[0010] Furthermore, the driving source includes a shell, a transition cavity is formed in the shell, wherein the transition cavity includes a columnar cavity and a fan-shaped cavity, the bottom end of the driving shaft extends to the columnar cavity and is provided with a rotating column, a torsion spring is provided between the rotating column and the columnar cavity, a baffle adapted to the fan-shaped cavity is provided on the side of the rotating column close to the fan-shaped cavity, the water inlet pipe includes a water inlet section and a water injection section respectively connected to the fan-shaped cavity, and when the torsion spring is in a normal state, the baffle is located between the water inlet section and the water injection section.

[0011] Furthermore, the hot and cold mixing assembly includes an outer shell, a mixing chamber is formed in the outer shell, and the mixing chamber is columnar, a side plate is arranged in the mixing chamber, the side plate divides the mixing chamber into an outer ring chamber and a central chamber, the head end and the tail end of the outer ring chamber are not connected, the tail end of the outer ring chamber is connected to the central chamber, the first liquid inlet pipe and the second liquid inlet pipe both flow into the outer ring chamber part of the mixing chamber along the tangential direction, but the first liquid inlet pipe is connected to the middle part of the outer ring chamber, the second liquid inlet pipe is connected to the head end of the outer ring chamber, and the liquid outlet pipe is connected to the central chamber.

[0012] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects: The present invention is based on the setting of a partition plate component and a hot and cold mixing component, so that after the hot water heated by the heat pump enters the water storage tank, the fluctuation of the water flow can be reduced, the stratification and zoning of cold and hot water can be achieved, and the temperature of the hot water taken by the user can be significantly improved, so that the user can prepare hot water of different temperatures according to the needs. It has the characteristics of simple structure, low cost, easy operation, strong practicality, etc.

[0013] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0015] Figure 1 It is a schematic diagram of the structure of the present invention from a first viewing angle; Figure 2 is a schematic diagram of the structure of the present invention from a second viewing angle; Figure 3 It is a schematic diagram of the cross-sectional structure of the water storage tank of the present invention; Figure 4 It is a schematic diagram of the structure of the hot and cold mixing assembly of the present invention; Figure 5 yes Figure 3 Schematic diagram of the local structure at A; Figure 6 It is a schematic diagram of the driving source structure of the present invention.

[0016] In the figure: 1-water storage tank; 11-upper insulation chamber; 12-lower insulation chamber; 2-heat exchange assembly; 3-partition plate assembly; 31-connecting hole; 32-plate body; 321-weight reduction chamber; 33-circular sink; 4-cold and hot mixing assembly; 41-mixing chamber; 411-outer ring chamber; 412-central chamber; 42-first liquid inlet pipe; 421-one-way solenoid valve; 43-second liquid inlet pipe; 44-liquid outlet pipe; 45-housing; 46-side plate; 5-sealing structure; 51-sealing plate; 52-pressure ring; 53-adapting hole; 54-driving member; 541-driving shaft; 542-limiting cylinder; 543-strip card slot; 544-block; 545-housing; 546-columnar cavity; 547-fan-shaped cavity; 548-rotating column; 549-baffle; 6-water inlet pipe; 61-water inlet section; 62-water injection section; 7-water outlet pipe; 8-connecting pipe. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0018] See also Figure 1-Figure 6 The present invention provides a heat pump water storage water heater, including a water storage tank 1 and a heat exchange component 2, wherein the heat exchange component 2 is mainly used to exchange heat with cold water to heat the cold water, and includes a heat exchange chamber and a heat exchange tube. The heat exchange component 2 is a prior art, and its specific structure and principle are not elaborated here. When in use, the cold water exchanges heat with the high-temperature fluid medium in the heat exchange tube in the heat exchange chamber in the heat exchange chamber. When the cold water is heated to become hot water of a preset temperature, it is discharged from the output end of the heat exchange chamber into the water storage tank 1 for storage, so as to provide hot water to the user when needed.

[0019] Of course, the heat pump storage water heater also includes components such as an evaporator, a condenser, a compressor and an expansion valve, but the above components are all existing technologies, and their specific structures and principles are not elaborated in detail here.

[0020] The present invention is to explain that the heat pump water storage type water heater also includes a partition plate assembly 3 and a hot and cold mixing assembly 4. The partition plate assembly 3 is longitudinally slidably arranged in the water storage tank 1. The partition plate assembly 3 divides the inner cavity of the water storage tank 1 into an upper insulation cavity 11 and a lower insulation cavity 12. The partition plate assembly 3 is evenly penetrated with connecting holes 31. The partition plate assembly 3 is also provided with a sealing structure 5 for sealing the connecting holes 31. The water storage tank 1 is also provided with a water outlet pipe 7 connected to the upper insulation cavity 11.

[0021] During the hot water storage period, the connecting hole 31 of the partition plate assembly 3 is not blocked by the blocking structure 5. At this time, the upper insulation chamber 11 and the lower insulation chamber 12 in the water storage tank 1 are in a connected state. The temperature of the hot water stored in the water storage tank 1 will gradually decrease after long-term storage. During this process, the stored water will produce thermal stratification. The water with high temperature will be transferred to the upper insulation chamber 11 (high temperature layer), and the water with lower temperature will be transferred to the lower insulation chamber 12 (low temperature layer). When the user uses the hot water, the water with slightly higher temperature in the upper insulation chamber 11 can be discharged through the water outlet pipe 7 for the user to use. In the process of discharging hot water from the upper insulation chamber 11, the partition plate assembly 3 can play an approximate separation effect, which can reduce the interference of the hot water (high temperature water) flow in the upper insulation chamber 11 with the hot water (low temperature water) in the lower insulation chamber 12, and avoid the hot water in the lower insulation chamber 12 from being disturbed and mixed with the water in the upper insulation chamber 11, thereby reducing the real-time temperature of the hot water in the upper insulation chamber 11.

[0022] Combination Figure 2 and Figure 4As shown, the hot and cold mixing assembly 4 includes a mixing chamber 41, two liquid inlet pipes connected to the mixing chamber 41, and a liquid outlet pipe 44 connected to the mixing chamber 41. The two liquid inlet pipes are respectively a first liquid inlet pipe 42 and a second liquid inlet pipe 43. The end of the first liquid inlet pipe 42 away from the mixing chamber 41 is connected to the bottom of the lower insulation chamber 12 of the water storage tank 1, and a one-way solenoid valve 421 is provided on the first liquid inlet pipe 42. The end of the second liquid inlet pipe 43 away from the mixing chamber 41 is connected to the water inlet pipe 6; the end of the liquid outlet pipe 44 away from the mixing chamber 41 is connected to the input end of the heat exchange assembly 2, and the output end of the heat exchange assembly 2 is connected to the upper insulation chamber 11 of the water storage tank 1 through a connecting pipe 8.

[0023] During use, as the liquid level in the upper heat preservation chamber 11 continues to decrease, when the liquid level in the upper heat preservation chamber 11 drops to the lower limit liquid level, it is necessary to add water to the water storage tank 1. At this time, the blocking structure 5 closes the connecting hole 31 of the partition plate assembly 3, and the one-way solenoid valve 421 is opened, and cold water is injected into the mixing chamber 41 through the water inlet pipe 6 through the second liquid inlet pipe 43. The cold water in the mixing chamber 41 is then introduced into the heat exchange assembly 2 from the input end of the heat exchange assembly 2 through the liquid outlet pipe 44 (due to the setting of the one-way solenoid valve 421, the cold water will not enter the lower heat preservation chamber 12 from the first liquid inlet pipe 42). After the cold water is heated by the heat exchange assembly 2 and becomes hot water, it is discharged from the output end of the heat exchange assembly 2 and enters the upper heat preservation chamber 11 through the connecting pipe 8 for storage; In the above process, since the plugging structure 5 closes the connecting hole 31 of the partition plate assembly 3, the upper insulation chamber 11 and the lower insulation chamber are both independent chambers. After the hot water enters the upper insulation chamber 11, it can avoid mixing with the low-temperature water in the lower insulation chamber 12, thereby reducing the temperature of the upper insulation chamber 11. As the amount of liquid in the upper insulation chamber 11 increases, the liquid in the upper insulation chamber 11 is equivalent to a "weight block" with increasing weight. The "weight block" can squeeze the partition plate assembly 3 to move it downward and transfer the liquid in the lower insulation chamber 12 from the upper insulation chamber 11 to the lower insulation chamber 12. A liquid inlet pipe 42 is pressed out, and the pressed low-temperature water enters the mixing chamber 41 and can be mixed with cold water and heated by the heat exchange component 2 before entering the upper insulation chamber 11; when the liquid level in the upper insulation chamber 11 reaches the upper limit liquid level, the water inlet pipe 6 stops injecting water, at this time, the blocking structure 5 releases the sealing of the connecting hole 31 of the partition plate component 3, the one-way solenoid valve 421 is closed, the upper insulation chamber 11 and the lower insulation chamber 12 are reconnected, and the partition plate component 3 moves upward and resets under the action of buoyancy. During the hot water storage period, the hot water stored inside it will naturally form layers. The present invention can significantly increase the temperature of hot water when the user takes it, so that the user can mix hot water of different temperatures according to needs.

[0024] It is particularly noteworthy that in the above-mentioned process of replenishing hot water, as hot water continuously enters the upper insulation chamber, the partition plate assembly 3 can move to the bottom of the water storage tank 1, so as to completely discharge the hot water with a lower temperature in the lower insulation chamber 12 to mix with the cold water, and re-enter the upper insulation chamber 11 of the water storage tank 1 after being heated by the heat exchange assembly 2. On the one hand, this method reduces the temperature difference between the upper insulation chamber 11 and the lower insulation chamber 12 in the water storage tank 1, thereby improving the insulation effect of the water storage tank 1; on the other hand, since the low-temperature water discharged from the lower insulation chamber 12 can be mixed with the cold water in the mixing chamber 41, the temperature of the mixed water when entering the heat exchange assembly 2 is also increased, thereby accelerating the process of the hot water entering the upper insulation chamber 11 to reach the preset temperature, thereby improving the heat exchange efficiency, shortening the time required to replenish high-temperature water in the water storage tank 1, and also reducing the heat exchange power of the heat exchange assembly 2, which has an energy-saving effect.

[0025] Combination Figure 3 As shown, in a specific embodiment of the present invention, the cross-section of the water storage tank 1 is non-circular, the partition plate assembly 3 includes a plate body 32, the outer wall of the plate body 32 is tightly attached to the inner wall of the water storage tank 1, a circular groove 33 is provided on the top of the plate body 32, and the connecting holes 31 are evenly arranged in the circular groove 33 area of ​​the plate body 32.

[0026] In a specific embodiment of the present invention, the plate body 32 is made of a high temperature resistant low density material, and the plate body 32 is hollow inside to form a weight reduction cavity 321. Thus, the weight of the plate body 32 can be reduced to increase the buoyancy of the plate body 32, ensuring that the plate body 32 will be reset under the action of buoyancy after the water injection stops.

[0027] In a specific embodiment of the present invention, the sealing structure 5 includes a sealing plate 51 rotatably set in the circular groove 33, and the shape of the sealing plate 51 is adapted to the circular groove 33 so that the outer wall of the sealing plate 51 is tightly attached to the inner wall of the circular groove 33. The sealing structure 5 is also provided with a pressing ring 52 pressed on the outer edge of the sealing plate 51, and an adapting hole 53 is provided on the sealing plate 51 corresponding to the connecting hole 31. The sealing structure 5 also includes a driving member 54 for driving the sealing plate 51 to rotate around its center axis between a first angle and a second angle. When the sealing plate 51 is at the first angle, the adapting hole 53 of the sealing plate 51 coincides with the connecting hole 31. When the sealing plate 51 is at the second angle, the adapting hole 53 of the sealing plate 51 is completely offset from the connecting hole 31.

[0028] Based on the above design, when the water inlet pipe 6 does not inject water into the mixing chamber 41, the sealing plate 51 is at a first angle driven by the driving member 54, the adapter hole 53 of the sealing plate 51 coincides with the connecting hole 31 of the plate body 32, and the upper insulation chamber 11 and the lower insulation chamber 12 are connected; and when the water inlet pipe 6 injects water into the mixing chamber 41, the sealing plate 51 is driven by the driving member 54 to move to a second angle, the adapter hole 53 of the sealing plate 51 is misaligned with the connecting hole 31 of the plate body 32, the sealing plate 51 can block the connecting hole 31, the upper insulation chamber 11 and the lower insulation chamber 12 are not connected, and the upper insulation chamber 11 and the lower insulation chamber 12 each form an independent chamber.

[0029] Combination Figure 5 As shown, further, the driving member 54 includes a driving shaft 541, the top end of the driving shaft 541 passes through the center of the plate body 32 and the sealing plate 51 and is fixed with a limiting cylinder 542, a strip groove 543 is provided on the outer side of the driving shaft 541 along its length direction, and a block 544 is provided on the sealing plate 51 to be inserted into the strip groove 543, and the bottom end of the driving shaft 541 is connected to a driving source for driving the driving shaft 541 to rotate.

[0030] Based on the above design, when the driving member 54 is working, it can drive the driving shaft 541 to rotate through the driving source, and when the driving shaft 541 rotates, based on the cooperation between the block 544 and the strip groove 543 on the sealing plate 51, the sealing plate 51 can be rotated together to complete the conversion of the sealing plate 51 between the first angle and the second angle, and the cooperation between the driving shaft 541 and the sealing plate 51 will not affect the up and down movement of the plate body 32 in the water storage tank 1.

[0031] Combination Figure 6 As shown, further, the driving source includes a shell 545, and a transition cavity is formed in the shell 545, wherein the transition cavity includes a columnar cavity 546 and a fan-shaped cavity 547, and the bottom end of the driving shaft 541 extends to the columnar cavity 546 and is provided with a rotating column 548, and a torsion spring (not shown) is provided between the rotating column 548 and the columnar cavity 546, and a baffle 549 adapted to the fan-shaped cavity 547 is provided on the side of the rotating column 548 close to the fan-shaped cavity 547, and the water inlet pipe 6 includes a water inlet section 61 and a water injection section 62 respectively connected to the fan-shaped cavity 547, and when the torsion spring is in a normal state, the baffle 549 is located between the water inlet section 61 and the water injection section 62.

[0032] Based on the above design, when the water inlet pipe 6 is not started to inlet water, the torsion spring is in a normal state, the baffle 549 is between the water inlet section 61 and the water injection section 62, at this time, the drive shaft 541 is at a first angle, the adapter hole 53 of the sealing plate 51 coincides with the connecting hole 31 of the plate body 32, and the upper heat preservation chamber 11 is connected to the lower heat preservation chamber 12; When the water inlet pipe 6 starts to be filled with water, the cold water enters the fan-shaped cavity 547 through the water inlet section 61 of the water inlet pipe 6, which will push the baffle 549 to rotate in the fan-shaped cavity 547. When the baffle 549 is flushed by the incoming water in the fan-shaped cavity 547 and rotates, it will synchronously drive the driving shaft 541 to rotate through the rotating column 548. After the baffle 549 rotates, the water inlet section 61 and the water injection section 62 are in a connected state. The water inlet section 61 and the water injection section 62 are connected through the fan-shaped cavity 547 to allow cold water to enter the mixing cavity 41. At this time, the driving shaft 541 rotates to the second angle, and the adapter hole 53 of the sealing plate 51 is misaligned with the connecting hole 31 of the plate body 32, and the sealing plate 51 can block the connecting hole 31.

[0033] That is, when the water inlet pipe 6 of the present invention does not inject water into the mixing chamber 41, the sealing plate 51 is at the first angle, and when the water inlet pipe 6 injects water into the mixing chamber 41, the sealing plate 51 will automatically move to the second angle.

[0034] In a specific embodiment of the present invention, the hot and cold mixing component 4 includes an outer shell 45, a mixing chamber 41 is formed in the outer shell 45, and the mixing chamber 41 is columnar, a side plate 46 is arranged in the mixing chamber 41, and the side plate 46 divides the mixing chamber 41 into an outer ring chamber 411 and a central chamber 412, the head end and the tail end of the outer ring chamber 411 are not connected, and the tail end of the outer ring chamber 411 is connected to the central chamber 412, the first liquid inlet pipe 42 and the second liquid inlet pipe 43 both flow into the outer ring chamber 411 part of the mixing chamber 41 along the tangential direction, but the first liquid inlet pipe 42 is connected to the middle part of the outer ring chamber 411, the second liquid inlet pipe 43 is connected to the head end of the outer ring chamber 411, and the liquid outlet pipe 44 is connected to the central chamber 412.

[0035] Based on the above design, when the water inlet pipe 6 injects cold water into the mixing chamber 41 through the second liquid inlet pipe 43, the cold water will first enter the outer ring chamber 411 and flow in a ring along the outer ring chamber 411. When the cold water reaches the middle of the outer ring chamber 411, it will mix with the low-temperature water flowing into the lower insulation chamber 12 through the first liquid inlet pipe 42, and then flow along the outer ring chamber 411 into the central chamber 412, and then be discharged through the liquid outlet pipe 44.

[0036] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A heat pump water storage water heater, comprising a water storage tank and a heat exchange component, characterized in that: It also includes a partition plate assembly and a hot and cold mixing assembly, wherein the partition plate assembly is longitudinally slidably arranged in the water storage tank, and the partition plate assembly divides the inner cavity of the water storage tank into an upper heat preservation cavity and a lower heat preservation cavity, the partition plate assembly is evenly penetrated with connecting holes, the partition plate assembly is provided with a blocking structure for blocking the connecting holes, and the water storage tank is also provided with a water outlet pipe connected to the upper heat preservation cavity; The hot and cold mixing assembly includes a mixing chamber, two liquid inlet pipes connected to the mixing chamber, and a liquid outlet pipe connected to the mixing chamber, the two liquid inlet pipes are respectively a first liquid inlet pipe and a second liquid inlet pipe, one end of the first liquid inlet pipe away from the mixing chamber is connected to the bottom of the lower insulation chamber, and a one-way solenoid valve is provided on the first liquid inlet pipe, one end of the second liquid inlet pipe away from the mixing chamber is connected to the water inlet pipe, one end of the liquid outlet pipe away from the mixing chamber is connected to the input end of the heat exchange assembly, and the output end of the heat exchange assembly is connected to the upper insulation chamber of the water storage tank through a connecting pipe.

2. The heat pump storage water heater according to claim 1, characterized in that: The cross section of the water tank is non-circular. The partition plate assembly includes a plate body, the outer wall of the plate body is tightly attached to the inner wall of the water tank, a circular sink groove is formed on the top of the plate body, and the connecting holes are evenly arranged in the circular sink groove area of ​​the plate body.

3. The heat pump storage water heater according to claim 2, characterized in that: The plate body is made of a high temperature resistant low density material, and the interior of the plate body is hollow to form a weight reduction cavity.

4. The heat pump storage water heater according to claim 2, characterized in that: The sealing structure includes a sealing plate rotatably arranged in a circular groove, and the shape of the sealing plate is adapted to the circular groove so that the outer wall of the sealing plate is tightly attached to the inner wall of the circular groove. The top of the sealing plate is also provided with a pressure ring pressed on the outer edge of the sealing plate, and an adaptation hole is provided on the sealing plate corresponding to the connecting hole. The sealing structure also includes a driving member for driving the sealing plate to rotate around its center line between a first angle and a second angle. When the sealing plate is at the first angle, the adaptation hole of the sealing plate coincides with the connecting hole, and when the sealing plate is at the second angle, the adaptation hole of the sealing plate is completely offset from the connecting hole.

5. The heat pump storage water heater according to claim 4, characterized in that: The driving member includes a driving shaft, the top end of the driving shaft passes through the center of the plate body and the sealing plate and is fixed with a limiting cylinder, a strip-shaped groove is opened on the outer side of the driving shaft along its length direction, and a card block is provided on the sealing plate to be inserted into the strip-shaped groove, and the bottom end of the driving shaft is connected to a driving source for driving the driving shaft to rotate.

6. The heat pump storage water heater according to claim 5, characterized in that: The driving source includes a shell, a transition cavity is formed in the shell, wherein the transition cavity includes a columnar cavity and a fan-shaped cavity, the bottom end of the driving shaft extends to the columnar cavity and is provided with a rotating column, a torsion spring is provided between the rotating column and the columnar cavity, a baffle adapted to the fan-shaped cavity is provided on the side of the rotating column close to the fan-shaped cavity, the water inlet pipe includes a water inlet section and a water injection section respectively connected to the fan-shaped cavity, and when the torsion spring is in a normal state, the baffle is located between the water inlet section and the water injection section.

7. The heat pump storage water heater according to claim 5, characterized in that: The hot and cold mixing component includes an outer shell, a mixing chamber is formed in the outer shell, and the mixing chamber is columnar. A side plate is arranged in the mixing chamber, and the side plate divides the mixing chamber into an outer ring chamber and a central chamber. The head end and the tail end of the outer ring chamber are not connected, and the tail end of the outer ring chamber is connected to the central chamber. The first liquid inlet pipe and the second liquid inlet pipe both flow into the outer ring chamber part of the mixing chamber along a tangential direction, but the first liquid inlet pipe is connected to the middle part of the outer ring chamber, the second liquid inlet pipe is connected to the head end of the outer ring chamber, and the liquid outlet pipe is connected to the central chamber.

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