Plate heat exchanger and heating water heater

Abstract

The utility model belongs to the technical field of intelligent household appliances, and particularly relates to a plate heat exchanger and a heating water heater, the plate heat exchanger comprises a plurality of plate sheets, a fluid channel is formed between every two adjacent plate sheets, every two adjacent fluid channels are a domestic water channel and a heating water channel respectively, at least one fluid channel in the fluid channels at the two end sides is a channel for domestic water, and the temperature of the domestic water is lower than that of the heating water; by means of the structure, efficient heat exchange is achieved, and meanwhile the temperature stability of domestic water in the using process is guaranteed.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a plate heat exchanger and a heating hot water boiler. Background Technology

[0002] A plate heat exchanger is a highly efficient heat exchange device consisting of a series of stacked metal plates with narrow channels between them. Hot and cold fluids flow alternately within these channels, and heat is efficiently transferred through the heat conduction of the plates.

[0003] In the prior art, a plate heat exchanger includes: multiple plates, with a fluid channel formed between two adjacent plates, and the two adjacent fluid channels are respectively a heating fluid channel and a heated fluid channel. The fluid channels on both ends are heating fluid channels. After the fluid in the heated fluid channel passes through the plate heat exchanger, the fluid temperature rises.

[0004] However, during the repeated use of the heated fluid in a short period of time, when the heated fluid channel is closed, the fluid in the heating fluid channel in the plate heat exchanger will still further heat the fluid in the heated fluid channel through heat exchange. This causes the fluid temperature to exceed the set temperature for a period of time after the heated fluid channel is reopened. Utility Model Content

[0005] This application provides a plate heat exchanger and a heating hot water boiler to solve the problem that when the heated fluid is repeatedly used in a short period of time, the temperature of the fluid will exceed the set temperature for a period of time after the heated fluid channel is opened.

[0006] In a first aspect, embodiments of this application provide a plate heat exchanger, comprising: a plurality of plates, with a fluid channel formed between two adjacent plates, the two adjacent fluid channels being a channel for domestic water and a channel for heating water, and at least one of the fluid channels on the two ends being the channel for domestic water.

[0007] As an optional implementation, in the plate heat exchanger provided in this application, the fluid channel on both ends that is far from the fluid inlet and outlet of the plate heat exchanger is the channel for the domestic water.

[0008] As an optional implementation, the plate heat exchanger provided in this application has corner holes on the plates, which are the inlets or outlets of the fluid channels.

[0009] As an optional implementation, the plate heat exchanger provided in this application has sealing gaskets on both sides of the plate, and the sealing gaskets are disposed around the corner holes and at the edges of the plate.

[0010] As an optional implementation, the plate heat exchanger provided in this application has corrugated plates.

[0011] Secondly, embodiments of this application provide a heating hot water boiler, including: a plate heat exchanger, a domestic water pipeline and a heating water circulation pipeline, wherein the heating water circulation pipeline and the domestic water pipeline exchange heat through the plate heat exchanger, and the plate heat exchanger is any of the plate heat exchangers provided in the first aspect above.

[0012] As an optional implementation, the heating hot water boiler provided in this application further includes: a water server, which is used to regulate the water flow rate of the domestic water pipeline.

[0013] As an optional implementation, the heating hot water boiler provided in this application includes a domestic water inlet in the domestic water pipeline, and the water server is installed at the domestic water inlet.

[0014] As an optional implementation, the heating hot water boiler provided in this application includes a domestic water outlet in the domestic water pipeline, and the water servo is installed at the domestic water outlet.

[0015] As an optional implementation, the heating water boiler provided in this application further includes a gas heat exchanger, through which the water in the heating water circulation pipeline is heated.

[0016] This application provides a plate heat exchanger and a heating water boiler. The plate heat exchanger includes: multiple plates, with a fluid channel formed between two adjacent plates. The two adjacent fluid channels are respectively a channel for domestic water and a channel for heating water. At least one of the fluid channels on both ends is a channel for domestic water, and the temperature of the domestic water is lower than the temperature of the heating water. This structure achieves efficient heat exchange while ensuring the temperature stability of the domestic water during use. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 Schematic diagram of the plate heat exchanger provided in this application Figure 1 ;

[0019] Figure 2 Schematic diagram of the plate heat exchanger provided in this application Figure 2 ;

[0020] Figure 3 Schematic diagram of the plate heat exchanger provided in this application Figure 3 ;

[0021] Figure 4 This is a schematic diagram of the structure of the heating hot water boiler provided in this application.

[0022] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0023] Attached reference numerals: 1. Plate; 2. Domestic water channel; 3. Heating water channel; A. End plate; B. Base plate; 4. Plate heat exchanger; 5. Domestic water pipeline; 6. Heating water circulation pipeline. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0026] Secondly, it should be noted that in the description of this utility model, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Plate heat exchangers, as highly efficient heat exchange devices, are widely used in various industrial production and daily life applications. They consist of a series of stacked metal plates, with narrow channels formed between them. This design allows hot and cold fluids to flow alternately within these channels, achieving efficient heat transfer through the thermal conduction of the plates.

[0029] Current plate heat exchangers consist of multiple plates stacked together, with a fluid channel formed between adjacent plates. These fluid channels are divided into heating fluid channels and heated fluid channels. Both end-plate fluid channels are for heating. When the heated fluid passes through these channels, it absorbs heat from the heating fluid, thus increasing its temperature.

[0030] However, in current plate heat exchangers, especially when the heated fluid is repeatedly used within a short period, even after the heated fluid channel is closed, the fluid in the heating fluid channel continues to further heat the fluid in the original heated fluid channel through heat exchange. This causes the fluid temperature to exceed the set temperature for a period of time after the heated fluid channel is reopened, thus affecting the fluid's performance.

[0031] To address the aforementioned issues, this application provides a plate heat exchanger in which multiple plates are arranged in an alternating pattern to form adjacent fluid channels, which are used for domestic water and heating water at different temperatures. At least one end-side fluid channel is set to flow domestic water at a lower temperature. In this way, when domestic water is repeatedly used, the uneven heating of domestic water by heating water after heat exchange (because the end-side domestic water channel is only heated on one side) causes the domestic water from the end side and the non-end side to mix and flow out, thereby effectively avoiding the problem of excessively high fluid temperature in the initial stage and ensuring that a stable fluid at a preset temperature is provided every time domestic water is used.

[0032] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0033] Figures 1-3 This is a schematic diagram of the plate heat exchanger structure provided in this application. This application provides a plate heat exchanger 4, such as... Figure 1-3 As shown, a plate heat exchanger 4 includes:

[0034] Multiple plates 1, with two adjacent plates 1 forming a fluid channel, and the two adjacent fluid channels being a domestic water channel 2 and a heating water channel 3, respectively, with at least one of the fluid channels on both ends being a domestic water channel 2.

[0035] The plate heat exchanger 4, as a highly efficient heat exchange device, mainly comprises multiple plates 1, with a fluid channel formed between two adjacent plates 1. Each fluid channel is used for fluid flow. Thus, in the plate heat exchanger 4, adjacent fluid channels respectively flow domestic water and heating water, thereby achieving efficient heat transfer. The design specifically considers the impact of temperature differences, ensuring that at least one end of the fluid channel flows with domestic water at a relatively lower temperature.

[0036] In a plate heat exchanger, the fluid flow path is as follows: The fluid first enters the heat exchanger's channels through end plate A, and these channels guide the fluid forward until it reaches the bottom plate region B. Upon reaching the bottom region, the fluid is again directed back into the fluid channels for the next cycle of circulation. This process continues until the fluid completes heat exchange and finally flows out of the heat exchanger through end plate A. This circulating flow ensures that the fluid can efficiently transfer heat within the heat exchanger.

[0037] At least one fluid channel on each end of the plate heat exchanger 4 is configured to flow domestic water with a relatively low flow temperature. During short-term repeated use of domestic water, when the domestic water channel is closed, the fluid in the heating water channel of the plate heat exchanger 4 will still further heat the fluid in the domestic water channel through heat exchange. At this time, since the end side is configured with a domestic water channel, and only one side of the end side domestic water channel has a heating water channel, the fluid in the heating water channel exchanges less heat with the fluid in the first channel. The heat exchange generated by the fluid in the heating water channel with the fluid in the end side domestic water channel cannot make the temperature of the domestic water on the end side reach the set temperature. The fluid in the end side domestic water channel will mix with the fluid in the non-end side domestic water channel and flow out. This avoids the problem that the domestic water temperature exceeds the set temperature for a period of time after the domestic water channel is opened during short-term repeated use of domestic water, and ensures that a stable and required fluid temperature can be obtained every time the domestic water is opened during use.

[0038] This application provides a plate heat exchanger 4, comprising: multiple plates 1, with a fluid channel formed between two adjacent plates 1, and the two adjacent fluid channels being a domestic water channel 2 and a heating water channel 3, respectively. At least one of the fluid channels on both ends is a domestic water channel 2, and the temperature of the domestic water is lower than that of the heating water. This structure achieves efficient heat exchange while ensuring the temperature stability of the domestic water during use.

[0039] In one alternative implementation, the fluid channels on both ends that are far from the fluid inlet and outlet of the plate heat exchanger 4 are channels 2 for domestic water.

[0040] First, when domestic water flows in from the end channel furthest from the inlet and outlet, it can more effectively utilize the entire length of the heat exchanger for heat exchange. Placing the low-temperature domestic water away from the inlet and outlet allows it to have ample opportunity to exchange heat with the high-temperature heating water throughout its flow path, thereby improving overall heat exchange efficiency. This design allows the domestic water to absorb heat from the heating water more evenly.

[0041] Secondly, placing domestic water channels away from inlets and outlets helps ensure the stability of domestic water temperature during use. Specifically, domestic water located at the end and non-end will have more time and space to mix, which can average out temperature differences caused by uneven local heat exchange. For example, during heat exchange, if domestic water in one area heats up rapidly due to a large temperature difference with heating water, the temperature will tend to be more even as it flows to other areas and mixes with the domestic water there.

[0042] Furthermore, this layout helps address the issue of temperatures exceeding set values ​​when domestic water is reused repeatedly in a short period. Because the domestic water supply channels are located away from the inlets and outlets, even when the flow of domestic water is shut off, residual heat will have a relatively small impact on the domestic water, thus reducing the risk of the domestic water temperature exceeding the set value when it is turned on again.

[0043] In summary, by setting the fluid inlet and outlet channels of the two end-side fluid channels, which are far from the plate heat exchanger 4, as the domestic water channel 2, not only can the heat exchange efficiency be improved, but also the accuracy and stability of temperature control can be enhanced.

[0044] In one alternative implementation, plate 1 has corner holes, which serve as inlets or outlets for fluid channels.

[0045] In the construction of the plate heat exchanger 4, each plate 1 is designed with corner holes. These serve as inlets or outlets for fluid passages, guiding fluid into or out of the interior of the plate heat exchanger 4.

[0046] First, the presence of the corner holes allows the fluid to be evenly distributed into each fluid channel, avoiding the problem of low heat exchange efficiency caused by uneven fluid distribution. When the plate heat exchanger 4 is operating, domestic water and heating water flow through adjacent fluid channels respectively. The corner hole design ensures that these two fluids can enter their respective channels evenly, achieving optimal heat exchange throughout the entire plate structure. This uniform distribution is crucial for improving overall heat exchange efficiency because it ensures that the fluid maintains full contact with the opposite fluid throughout the heat exchange process, maximizing heat transfer.

[0047] Secondly, the corner holes, serving as fluid inlets and outlets, greatly facilitate the connection between the plate heat exchanger 4 and the external piping system. This means that whether integrating the plate heat exchanger 4 into existing industrial processes or designing new fluid circulation systems, the installation work can be completed more easily and quickly.

[0048] In summary, the corner holes, as an indispensable part of the plate heat exchanger 4, not only promote uniform fluid distribution and efficient flow, but also greatly simplify the integration process between the equipment and the external piping system. At the same time, they also facilitate daily maintenance and cleaning, helping to ensure the long-term stable operation of the plate heat exchanger 4.

[0049] In one alternative implementation, sealing gaskets are provided on both sides of the plate 1, and the sealing gaskets are provided around the corner holes and on the edge of the plate 1.

[0050] In the construction of the plate heat exchanger 4, sealing gaskets are designed on both sides of the plates 1. These sealing gaskets are placed around the corner holes and at the edges of the plates 1. The corner holes are key areas for fluid entry and exit from the plates 1, while the edges of the plates 1 are key areas for connections between the plates 1 and between the plates 1 and the frame. The sealing gaskets are designed to ensure a tight seal between these key areas, prevent fluid leakage, and thus maintain the normal operation of the plate heat exchanger 4.

[0051] The reason for placing gaskets on both sides of plate 1, especially around the corner holes and edge areas, is that these areas are potential leakage points in the plate heat exchanger 4. The corner holes, as critical connection points for fluid channels, can lead to fluid leakage and affect heat exchange efficiency if not sealed properly. Similarly, the edge areas of plate 1 are subjected to significant pressure during the stacking and fixing process; poor sealing can also cause leakage. Therefore, using gaskets can significantly improve the sealing performance of the plate heat exchanger 4, ensuring stable operation under various conditions.

[0052] In one alternative implementation, plate 1 has corrugations.

[0053] In the design of the plate heat exchanger 4, the corrugations on the plates 1 are a series of uneven structures formed on the surface of the plates 1, usually presenting as continuous or discontinuous wave shapes. This design not only enhances the heat exchange efficiency but also improves the structural strength of the plates 1, enabling the plate heat exchanger 4 to operate stably under various working conditions.

[0054] First, the corrugations designed on plate 1 significantly increase the effective heat exchange area of ​​plate 1. By increasing the uneven structure on the surface of plate 1, the contact area between the fluid and plate 1 is greatly improved even with the same physical dimensions. This means that when the fluid flows through plate 1, it can exchange heat with plate 1 more fully, thereby significantly improving heat exchange efficiency. Furthermore, the corrugated structure promotes turbulence, which further increases the rate of heat transfer. Turbulence can reduce the thickness of the fluid boundary layer, making it easier for heat to be transferred from one fluid to another, which is crucial for improving overall heat exchange efficiency.

[0055] Secondly, the corrugated design plays a crucial role in enhancing the rigidity and deformation resistance of the plate 1. Plate heat exchangers 4 often handle high-pressure or high-temperature fluids, requiring their components to possess sufficient strength and stability. The corrugated structure, by increasing the thickness of the plate 1 and altering its internal stress distribution, effectively improves the plate 1's compressive strength and resistance to deformation. This means that even under extreme operating conditions, the plate heat exchanger 4 can maintain good performance, without efficiency reduction or malfunction due to plate 1 deformation. Simultaneously, the corrugated structure also helps disperse the forces applied to the plate 1, thereby extending the equipment's service life.

[0056] In addition, the corrugated structure helps reduce the flow resistance of the fluid between the plates 1, improving fluid flowability. Traditional smooth plate surfaces can lead to poor fluid flow, especially at high flow rates, easily generating significant flow resistance. The corrugated structure, by altering the fluid's flow path, makes it easier for the fluid to pass through the narrow space between the plates 1, thereby reducing flow resistance and promoting smooth fluid flow. This characteristic helps improve heat exchange efficiency because lower flow resistance means less energy is required to pump the fluid.

[0057] Figure 4 This is a schematic diagram of a portion of the heating hot water boiler provided in this application. This application provides a heating hot water boiler, such as... Figure 4 As shown, a heating hot water boiler includes:

[0058] Plate heat exchanger 4, domestic water pipe 5 and heating water circulation pipe 6, the heating water circulation pipe 6 and domestic water pipe 5 exchange heat through plate heat exchanger 4, plate heat exchanger 4 is any of the plate heat exchangers 4 provided above.

[0059] In a heating and hot water boiler that includes a plate heat exchanger 4, domestic water pipes 5, and heating water circulation pipes 6, domestic water and heating water are effectively transferred through two adjacent channels.

[0060] When a user repeatedly uses domestic hot water in a short period of time, even after the user closes the hot water outlet, the heating water in plate heat exchanger 4 will still further heat the domestic hot water through heat exchange. At this time, since the domestic water channel is set on the end side, and only one side of the domestic water channel has a heating water channel, the heat exchange between the heating water and the domestic water is less. The heat exchange between the heating water and the domestic water on the end side cannot make the domestic water temperature on the end side reach the set temperature. The domestic water on the end side and the domestic water on the non-end side will flow out mixed. This avoids the problem that the hot water temperature exceeds the set temperature for a period of time after the hot water is turned on during the repeated use of hot water in a short period of time, and ensures that a stable and satisfactory hot water temperature can be obtained every time the hot water is turned on during use.

[0061] The heating water boiler integrates a high-efficiency plate heat exchanger 4, domestic water pipes 5, and heating water circulation pipes 6. The boiler achieves heat exchange between domestic water and heating water through the plate heat exchanger 4. This design not only improves energy efficiency but also solves the problem of unstable outlet water temperature that users may encounter when repeatedly using domestic hot water in a short period.

[0062] In one alternative implementation, the heating hot water boiler also includes a water server for regulating the water flow rate of the domestic water pipe 5.

[0063] A water servo is an intelligent regulating device whose main function is to precisely control the water flow in the domestic water pipes 5. By adding a water servo, the heating water boiler can achieve more precise and stable regulation of the domestic water temperature.

[0064] Traditional heating and hot water boilers often encounter temperature fluctuations during use. When multiple water outlets use water simultaneously or when water usage changes drastically, traditional boilers often struggle to adjust quickly, leading to temperature fluctuations and impacting the user experience. A water servo, however, effectively counteracts these temperature fluctuations caused by changes in water usage by sensing and adjusting the water flow in the domestic water pipes 5 in real time, ensuring stable and comfortable hot water output. Furthermore, the water servo can automatically adjust the water flow based on the user's set temperature requirements, achieving energy-saving and efficient hot water supply.

[0065] To implement the functions of the water servo, the first step is to install the water servo device in the domestic water pipe 5 of the heating water boiler. Then, by connecting the water servo to the control system of the heating water boiler, information exchange between the two is achieved. The control system monitors the flow rate and water temperature changes in the domestic water pipe 5 in real time and sends adjustment commands to the water servo according to preset algorithms and logic. Upon receiving the command, the water servo quickly adjusts its internal regulating valve, thereby changing the water flow rate in the domestic water pipe 5. In this way, the water servo can achieve precise control of the water temperature output from the water boiler, ensuring that users can obtain a stable and comfortable hot water experience in any water usage scenario.

[0066] In one alternative implementation, the domestic water pipeline 5 includes a domestic water inlet, and a water server is installed at the domestic water inlet.

[0067] In the heating water boiler, the domestic water pipe 5 includes a domestic water inlet, which is the entrance for the boiler to connect to an external water source. The water servo is located at this inlet. As an intelligent regulating device, the water servo primarily controls and regulates the flow rate of domestic water before it enters the boiler.

[0068] Placing the water servo at the domestic water inlet ensures precise flow control of all domestic water entering the water heater. This design helps the water heater utilize energy more efficiently because the heating time and energy required can be precisely controlled by adjusting the water flow. Simultaneously, it effectively prevents drastic temperature fluctuations, ensuring users receive a stable and comfortable hot water experience.

[0069] In one alternative implementation, the domestic water pipeline 5 includes a domestic water outlet, and a water server is installed at the domestic water outlet.

[0070] As the final link in the five-stage process of domestic water pipelines, the domestic water outlet is directly related to the user's water experience. It is not only responsible for releasing domestic water to places that users can easily reach, such as kitchen faucets and bathroom shower heads, but also plays a role in regulating the speed and direction of water flow to adapt to different water needs.

[0071] To further improve water efficiency and comfort, a water servo is installed at the domestic water outlet. It integrates sophisticated sensors and control mechanisms to monitor the water flow in real time and automatically adjust parameters such as water temperature and pressure based on preset conditions or immediate user commands. This design not only ensures users receive water conditions that meet their needs instantly, such as a suitable shower temperature or a stable water flow for washing vegetables, but also significantly improves water resource utilization efficiency and reduces unnecessary waste.

[0072] In one alternative implementation, the heating water boiler further includes a gas heat exchanger, through which water in the heating water circulation pipe 6 is heated.

[0073] In addition to the components mentioned earlier, the heating water boiler is also equipped with a gas heat exchanger. This component is a key part of the heating water circulation pipe 6, and its main function is to use the heat generated by the combustion of gas to heat the water in the circulation pipe. The gas heat exchanger transfers the heat energy released by the combustion of gas to the heating water through an efficient heat exchange process, thereby raising the temperature of the heating water.

[0074] The reason for introducing gas heat exchangers into heating water boilers is that they provide a highly efficient and reliable heating method. Compared to other heating methods, gas combustion generates a large amount of heat that is easy to control, meeting the diverse heating temperature needs of different users. At the same time, gas heat exchangers, through optimized heat exchange design, can maximize thermal efficiency and reduce energy waste. Furthermore, as a clean energy source, the use of gas also helps reduce environmental pollution, aligning with modern environmental protection principles.

[0075] In practical applications, a gas-fired heat exchanger is installed on the heating water circulation pipe 6 to ensure smooth flow and heating of the circulating water. The operation of the gas-fired heat exchanger is typically connected to the water heater's control system, allowing users to set their desired heating water temperature. When the water heater starts, the control system instructs the gas supply system to provide an appropriate amount of gas to the heat exchanger and ignite it. The heat generated by combustion is transferred to the circulating water through the heat exchange surface of the heat exchanger, raising its temperature. Simultaneously, the control system monitors the heating water temperature in real time and adjusts the gas supply as needed to ensure a stable and comfortable heating water temperature. In this way, the heating water heater can provide users with stable and efficient heating services.

[0076] The technical solution of this utility model has been described in conjunction with the specific embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A plate heat exchanger, characterized in that Comprising: a plurality of plates, two adjacent plates forming a fluid channel, two adjacent fluid channels being a domestic water channel and a heating water channel respectively, at least one of the two end-side fluid channels being the domestic water channel.

2. The plate heat exchanger according to claim 1, characterized in that The fluid channel far from the fluid inlet and outlet of the plate heat exchanger among the two end-side fluid channels is the domestic water channel.

3. The plate heat exchanger according to claim 1 or 2, characterized in that The plate has a corner hole, which is the inlet or outlet of the fluid channel.

4. The plate heat exchanger according to claim 3, characterized in that The plate has a sealing gasket on both sides, which is arranged around the corner hole and the edge of the plate.

5. The plate heat exchanger according to claim 1 or 2, characterized in that The plate has a corrugation.

6. A combination heating and hot water boiler, characterised in that Comprising: a plate heat exchanger, a domestic water pipeline and a heating water circulation pipeline, the heating water circulation pipeline and the domestic water pipeline being heat exchanged by the plate heat exchanger, the plate heat exchanger being any one of claims 1-5.

7. The combination heating and hot water boiler according to claim 6, wherein Further comprising: a water servo, which is used to adjust the water flow of the domestic water pipeline.

8. The combination heating and hot water boiler according to claim 7, wherein The domestic water pipeline includes a domestic water inlet, and the water servo is arranged at the domestic water inlet.

9. The combination heating and hot water boiler of claim 7 wherein, The domestic water pipeline includes a domestic water outlet, and the water servo is arranged at the domestic water outlet.

10. The combination heating and hot water boiler of claim 6, wherein Further comprising: a gas heat exchanger, and the water in the heating water circulation pipeline is heated by the gas heat exchanger.

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