Heating water tank and water heater

Abstract

The utility model belongs to the technical field of water heaters, and discloses a heating water tank and a water heater. The heating water tank comprises a tank body, a bottom heat exchanger and a side heat exchanger, the bottom heat exchanger is arranged on the bottom surface of the box body and is provided with a bottom medium inlet end and a bottom medium outlet end which are used for introducing a medium; the side heat exchanger covers at least part of the side wall of the box body and is provided with a side medium inlet end, and the side medium inlet end communicates with the bottom medium outlet end. In the heating process, natural convection is formed in the box body, water in the box body fully flows and is mixed, and it can be guaranteed that the water temperature is not layered; high-temperature heat exchange media make contact with cold water at the bottom end, the heat exchange efficiency is high, and the energy utilization rate of water at the bottom of the box can be increased; after water temperature layering in the box body is eliminated, the displayed water temperature of the heating water tank is close to the actual water outlet temperature, the probability that the top water temperature of the box body is too high and the bottom water temperature cannot reach the set temperature is reduced, water outlet potential safety hazards are eliminated, constant-temperature water outlet is achieved, and user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of water heaters, in particular to a heating water tank and a water heater. Background Art

[0002] Air energy water heater, also known as air source heat pump water heater, works by using a small amount of electrical energy to drive the compressor. The high-pressure liquid working fluid evaporates into gas in the evaporator after passing through the expansion valve, and absorbs a large amount of heat energy from the air; the gaseous working fluid is compressed by the compressor into a high-temperature, high-pressure liquid, and then enters the condenser to release heat and heat the water, and this cycle continues to provide hot water.

[0003] Existing air-energy water heaters generally have coils attached to the outside of the water tank as condensers. Since the refrigerant flows from top to bottom around the water tank, during the process of heating the water inside the water tank, the high-temperature refrigerant will first heat the water in the upper part of the water tank. As the refrigerant flows, the temperature of the refrigerant gradually decreases from top to bottom, resulting in stratification of the water temperature inside the water tank during the heating process, with the water temperature in the upper part of the water tank being high and the water temperature in the lower part of the water tank being low. Water temperature stratification will lead to problems such as low energy utilization of the water temperature in the lower part of the water tank, too high water outlet temperature in the upper part of the water tank, and reduced heat exchange efficiency of the condenser. Utility Model Content

[0004] The utility model aims to provide a heating water tank and a water heater, which can solve the problems of low energy utilization rate of water temperature in the lower part of the water tank, too high water outlet temperature in the upper part of the water tank and reduced heat exchange efficiency of the condenser caused by water temperature stratification in the water tank.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A heating water tank, comprising:

[0007] Box;

[0008] A bottom heat exchanger is arranged on the bottom surface of the box body, and the bottom heat exchanger is provided with a bottom medium inlet end for medium to enter and a bottom medium outlet end for medium to flow out;

[0009] A side heat exchanger covers at least a portion of the side wall of the box body, and the side heat exchanger is provided with a side medium inlet end, and the side medium inlet end is connected to the bottom medium outlet end.

[0010] As an optional solution of the above-mentioned heating water tank, the bottom heat exchanger includes a bottom coil, and the bottom coil covers at least a part of the bottom surface of the tank body.

[0011] As an optional solution for the above-mentioned heating water tank, the bottom coil extends spirally with the bottom medium inlet end or the bottom medium outlet end as the center;

[0012] And / or, the bottom coil is a flat tube;

[0013] And / or, the bottom coil is fixed to the box body by bonding with heat-conducting adhesive.

[0014] As an optional solution for the above-mentioned heating water tank, the side heat exchanger includes:

[0015] A vertical pipe, the vertical pipe being connected to the bottom medium outlet end;

[0016] A transverse communication structure extends around the circumference of the box body and is communicated with the vertical pipe.

[0017] As an optional solution for the above-mentioned heating water tank, the transverse connecting structure includes a plurality of transverse tubes, and the plurality of transverse tubes are arranged in parallel around the circumference of the tank body, and each of the transverse tubes is connected to the vertical tube.

[0018] As an optional solution for the above-mentioned heating water tank, the transverse connecting structure includes a heat exchange tube group, which includes a plurality of transverse tubes connected in series or in parallel, and the plurality of transverse tubes are arranged in parallel around the circumference of the box body, and the heat exchange tube group is connected to the vertical tube.

[0019] As an optional solution for the above-mentioned heating water tank, the heat exchange tube group is provided with multiple groups, and the multiple groups of heat exchange tube groups are connected in series, and the heat exchange tube groups at the head and tail ends are respectively connected to the vertical pipe;

[0020] Alternatively, the heat exchange tube groups are provided in a plurality of groups, the plurality of groups of heat exchange tube groups are arranged along the length direction of the vertical tube, and each of the heat exchange tube groups is connected to the vertical tube.

[0021] As an optional solution for the above-mentioned heating water tank, two vertical pipes are provided, the transverse communication structure is respectively connected to the two vertical pipes, and the two vertical pipes are arranged at intervals;

[0022] And / or, the top end or the bottom end of the vertical pipe is connected to the bottom medium outlet end.

[0023] As an optional solution for the above-mentioned heating water tank, the side heat exchanger includes a microchannel heat exchanger;

[0024] Alternatively, the side heat exchanger comprises a side coil extending in a spiral around the circumference of the tank.

[0025] A water heater comprises the above-mentioned heating water tank.

[0026] Beneficial effects of the utility model:

[0027] The heating water tank provided by the utility model comprises a box body, a bottom heat exchanger and a side heat exchanger; the bottom heat exchanger is arranged on the bottom surface of the box body, and the bottom medium inlet end of the bottom heat exchanger is used to pass the high-temperature heat exchange medium; the side heat exchanger covers at least part of the side wall of the box body, and the side medium inlet end of the side heat exchanger is connected with the bottom medium outlet end of the bottom heat exchanger. The high-temperature heat exchange medium first passes through the bottom heat exchanger, and heats the water at the bottom end of the box body through the heat exchange between the bottom heat exchanger and the box body; the water temperature at the bottom end of the box body increases after being heated, and the density of the heated water decreases with the increase in temperature, so that the hot water will flow upward, and the cold water at the top of the box body will flow downward, forming natural convection in the box body. The temperature of the heat exchange medium entering the side heat exchanger is relatively low, and the side of the box body can be heated, that is, the hot water flowing upward can be kept warm, so that the temperature of the hot water in the box body is uniform, and constant temperature water outlet is achieved.

[0028] During the entire heating process, natural convection is formed inside the box, and the water in the box flows and mixes fully, ensuring that the water temperature is not stratified; the high-temperature heat exchange medium is in contact with the cold water at the bottom, with high heat exchange efficiency, which can increase the energy utilization rate of the water at the bottom of the box; after eliminating the water temperature stratification in the box, the displayed water temperature of the heating water tank is close to the actual water outlet temperature, reducing the probability of the water temperature at the top of the box being too high and the water temperature at the bottom not reaching the set temperature, eliminating water outlet safety hazards and improving users' water use experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a heating water tank provided by the utility model.

[0030] In the figure:

[0031] 100, box body; 110, cold water inlet; 120, hot water outlet; 200, condenser; 210, bottom heat exchanger; 211, bottom medium inlet end; 212, bottom medium outlet end; 220, side heat exchanger; 221, vertical pipe; 222, horizontal pipe; 223, outlet pipe; 224, inlet pipe. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides a heating water tank, such as Figure 1 As shown, the heating water tank includes a tank body 100, a bottom heat exchanger 210 and a side heat exchanger 220. The tank body 100 is used to store water, and both the bottom heat exchanger 210 and the side heat exchanger 220 contain heat exchange medium, which can exchange heat with the water in the tank body 100 to heat the water in the tank body 100, thereby preparing hot water for use.

[0037] The bottom heat exchanger 210 is disposed at the bottom of the box 100 and is used to heat the water at the bottom of the box 100; the side heat exchanger 220 covers at least part of the side wall of the box 100, and the side heat exchanger 220 is used to exchange heat with the box 100 to heat the water in the box 100. In order to simplify the structure and reduce the number of parts, the bottom heat exchanger 210 and the side heat exchanger 220 are connected, and the heat exchange medium passes through the bottom heat exchanger 210 and the side heat exchanger 220 connected in series to improve the utilization rate of the heat in the heat exchange medium.

[0038] In order to avoid water temperature stratification in the box body 100, the inlet end of the bottom heat exchanger 210 (hereinafter referred to as the bottom medium inlet end 211) is used to introduce heat exchange medium, and the outlet end of the bottom heat exchanger 210 (hereinafter referred to as the bottom medium outlet end 212) is connected to the inlet end of the side heat exchanger 220 (hereinafter referred to as the side medium inlet end), so that the high-temperature heat exchange medium first passes through the bottom heat exchanger 210 to heat the water at the bottom end of the box body 100, and then enters the side heat exchanger 220 to further exchange heat with the water, so as to achieve the effect of keeping the heated hot water warm, so that the box body 100 can discharge water at a constant temperature.

[0039] In this embodiment, the high-temperature heat exchange medium first passes through the bottom heat exchanger 210, and heats the water at the bottom of the box 100 through heat exchange between the bottom heat exchanger 210 and the box 100; the water temperature at the bottom of the box 100 increases after being heated, and the density of the heated water decreases as the temperature increases, so that the hot water will flow upward, and the cold water at the top of the box 100 will flow downward, forming natural convection in the box 100. The temperature of the heat exchange medium entering the side heat exchanger 220 is relatively low, and the side of the box 100 can be heated, that is, the hot water flowing upward can be kept warm, so that the temperature of the hot water in the box 100 is uniform, and constant temperature water output is achieved.

[0040] During the entire heating process, natural convection is formed inside the box 100, and the water in the box 100 flows and mixes fully, which can ensure that the water temperature is not stratified; the high-temperature heat exchange medium is in contact with the cold water at the bottom, and the heat exchange efficiency is high, which can increase the energy utilization rate of the water at the bottom of the box 100; after eliminating the water temperature stratification in the box 100, the displayed water temperature of the heating water tank is close to the actual water outlet temperature, reducing the probability of the water temperature at the top of the box 100 being too high and the water temperature at the bottom failing to reach the set temperature, eliminating the hidden danger of water outlet safety, and improving the user's water use experience.

[0041] In addition, the bottom heat exchanger 210 exchanges heat with the bottom of the box 100, and the side heat exchanger 220 exchanges heat with the side of the box 100. Since the height dimension of the box 100 is relatively large, the heat exchange area on the side of the box 100 is larger. The high-temperature heat exchange medium first enters the bottom heat exchanger 210 to heat the water at the bottom. The heat exchange medium with reduced temperature then enters the side heat exchanger 220 to heat the water on the side of the box 100. This can balance the distribution of heat in the box 100 and is conducive to uniform water temperature in the box 100.

[0042] In order to improve the heat exchange effect between the bottom heat exchanger 210 and the box 100, the bottom heat exchanger 210 includes a bottom coil, and the bottom coil covers at least a portion of the bottom surface of the box 100. The bottom coil is used to perform contact heat exchange with the box 100, and the winding method of the bottom coil can be adjusted according to the shape or size of the box 100 to increase the heat exchange area between the bottom heat exchanger 210 and the box 100, thereby improving the heat exchange effect.

[0043] like Figure 1 As shown, the bottom surface of the box 100 is a downwardly convex arc surface, and the bottom coil extends in a spiral with one end of the bottom coil as the center. The bottom coil can extend following the curvature change of the bottom surface of the box 100, so that the bottom coil forms an arc surface that matches the bottom surface of the box 100, thereby increasing the contact area between the bottom coil and the box 100, thereby making the bottom coil and the bottom of the box 100 more efficiently exchange heat, improving the heat conduction efficiency, effectively increasing the amount of heat obtained at the bottom of the box 100, and achieving uniform distribution of heating above and below the box 100.

[0044] In this embodiment, one end of the bottom coil is the bottom medium inlet end 211, and the other end is the bottom medium outlet end 212. The bottom coil is spirally wound in multiple turns, the bottom medium inlet end 211 is located on the outside, and the bottom medium outlet end 212 is located in the center or extends from the center to the outside. That is, the heat exchange medium enters from the outer ring of the bottom coil and flows out from the center of the bottom coil. This arrangement enables the high-temperature heat exchange medium to directly exchange heat with the bottom end of the box 100 after entering the bottom coil, avoiding heat waste, improving heat utilization, and improving heat exchange effect.

[0045] In other embodiments, the bottom coil may extend spirally around the bottom medium inlet end 211 as the center, that is, the heat exchange medium enters from the center of the bottom coil and flows out from the outer circle of the bottom coil.

[0046] Optionally, the bottom coil can be a metal coil with good thermal conductivity, such as an aluminum coil or a copper coil. The bottom coil can also be other non-metallic coils with good thermal conductivity, and the specific material of the bottom coil can be set as needed.

[0047] Optionally, the bottom coil may be a flat tube, so that the contact area between the bottom coil and the bottom of the box 100 is increased, thereby ensuring good heat exchange between the two.

[0048] Optionally, the bottom coil can be fixed to the bottom of the box 100 by bonding with thermal conductive adhesive, which facilitates the fixation of the bottom coil to the box 100. The thermal conductive adhesive bonding can ensure that the bottom coil maintains good contact with the box 100 and facilitates the rapid diffusion of heat into the box 100 to heat the water at the bottom of the box 100.

[0049] In this embodiment, the side heat exchanger 220 covers part of the side surface of the box body 100 and has a certain size in the vertical direction to increase the heat exchange area with the box body 100 and improve the heat exchange effect.

[0050] Specifically, the side heat exchanger 220 includes a vertical pipe 221 and a transverse communication structure, and the transverse communication structure is connected to the vertical pipe 221. In this embodiment, the transverse communication structure includes a plurality of transverse pipes 222. The vertical pipe 221 extends in the up-down direction and is used to communicate with the bottom medium outlet 212 of the bottom coil; a plurality of transverse pipes 222 are arranged in parallel in the vertical direction, and each transverse pipe 222 is connected to the vertical pipe 221, and the transverse pipes 222 are arranged around the circumference of the box body 100. The heat exchange medium flowing out of the bottom coil first enters the vertical pipe 221, and is divided to the plurality of transverse pipes 222 by flowing in the vertical pipe 221, so as to reduce the temperature difference of the heat exchange medium in the transverse pipe 222; by exchanging heat with the box body 100 through a plurality of transverse pipes 222 arranged at intervals in the vertical direction, the heat provided to the box body 100 by the side heat exchanger 220 can be distributed more evenly in the vertical direction, so as to further eliminate the water temperature stratification.

[0051] Optionally, the gap between two adjacent transverse tubes 222 may be different. For example, when it is necessary to avoid the surface structure of the box 100, the gap between two adjacent transverse tubes 222 may be slightly increased to avoid structural interference; when it is not necessary to avoid, the gap between two adjacent transverse tubes 222 is smaller, so as to increase the number of transverse tubes 222 as much as possible without changing the size of the box 100, thereby increasing the heat exchange area.

[0052] In this embodiment, two vertical pipes 221 are provided. One end of each horizontal pipe 222 is connected to one of the two vertical pipes 221, and the other end is connected to the other of the two vertical pipes 221, and the two vertical pipes 221 are arranged at intervals. This arrangement can connect the two ends of multiple horizontal pipes 222 in parallel, thereby improving the structural stability of the side heat exchanger 220.

[0053] In addition, the two vertical pipes 221 are arranged at intervals, and the interval between the two vertical pipes 221 can be adjusted by bending the horizontal pipe 222, and the size of the space enclosed by the horizontal pipe 222 can be adjusted to match the box bodies 100 of different sizes, thereby improving the compatibility of the side heat exchanger 220.

[0054] In some embodiments, multiple transverse tubes 222 may be connected in series or in parallel to form a heat exchange tube group, and the heat exchange tube group is respectively connected to the two vertical tubes 221. When multiple transverse tubes 222 are connected in series, the end of the upstream transverse tube 222 may be connected to the head end of the downstream transverse tube 222 through a connecting pipe to form a series structure; when multiple transverse tubes 222 are connected in parallel, both ends of the multiple transverse tubes 222 are connected in sequence through a connecting pipe to form a parallel structure.

[0055] Optionally, the number of heat exchange tube groups can be set to multiple groups, and the multiple heat exchange tube groups are connected in series, and the heat exchange tube groups at the head and tail ends are respectively connected to the vertical pipe 221, that is, the multiple heat exchange tube groups are connected in series to form a transverse connecting structure, and the two ends of the transverse connecting structure are respectively connected to the vertical pipe 221.

[0056] Optionally, the number of heat exchange tube groups can be set to multiple groups, and the connecting sections of each group of heat exchange tube groups are respectively connected to the vertical pipe 221, and the multiple groups of heat exchange tube groups can be arranged in the vertical direction.

[0057] In this embodiment, the side heat exchanger 220 also includes an inlet pipe 224 and an outlet pipe 223. The inlet pipe 224 serves as the side medium inlet end of the side heat exchanger 220. The inlet pipe 224 is used to communicate with the bottom medium outlet end 212 of the bottom coil so that the heat exchange medium in the bottom coil can enter the side heat exchanger 220; the outlet pipe 223 serves as the side medium outlet end of the side heat exchanger 220. The outlet pipe 223 is used to discharge the heat exchange medium to achieve the flow of the heat exchange medium.

[0058] like Figure 1 As shown, the inlet pipe 224 and the outlet pipe 223 can be connected to the same vertical pipe 221 and are respectively located at the two ends of the vertical pipe 221; in other embodiments, the inlet pipe 224 can be connected to one of the two vertical pipes 221, and the outlet pipe 223 can be connected to the other of the two vertical pipes 221.

[0059] In this embodiment, the inlet pipe 224 is connected to the top of one of the vertical pipes 221, that is, the heat exchange medium flowing out of the bottom coil enters the top of the vertical pipe 221, flows from top to bottom and is divided into each horizontal pipe 222. This arrangement is conducive to heating the water below the hot water that rises to the top of the box body 100 through natural convection, is conducive to improving the insulation effect of the hot water on the top of the box body 100, and is conducive to eliminating water temperature stratification.

[0060] In other embodiments, the inlet pipe 224 can be connected to the bottom end or the middle of one of the vertical pipes 221 without affecting the normal operation of the heating water tank.

[0061] In other embodiments, the side heat exchanger 220 may include a side coil, and the side coil may extend spirally along the circumference of the tank 100 to be wound around the outside of the tank 100 in a plurality of turns.

[0062] In other embodiments, the side heat exchanger 220 may also include a microchannel heat exchanger, which has good heat exchange performance and energy-saving advantages.

[0063] In order to facilitate the heating of the water tank to replenish water and provide hot water, the box body 100 is provided with a cold water inlet 110 and a hot water outlet 120. The cold water inlet 110 is used to pass water into the box body 100 to replenish the water in time; the hot water outlet 120 is used to output hot water to the outside for convenient use.

[0064] In this embodiment, the hot water outlet 120 is arranged at the top of the box 100, and the cold water inlet 110 is arranged at the bottom of the box 100, so as to make full use of the characteristics of low density of hot water and high density of cold water. Hot water is stably output through the hot water outlet 120 at the top of the box 100, and cold water is replenished in time through the cold water inlet 110 at the bottom of the box 100, which is beneficial to the heat exchange between cold water and the bottom coil, improves the heating efficiency, and helps to maintain a uniform water temperature in the box 100.

[0065] In this embodiment, the side heat exchanger 220 is located between the cold water inlet 110 and the hot water outlet 120, and has a certain extension dimension in the vertical direction to heat the water in the middle section of the box 100; the temperature of the heat exchange medium entering the side heat exchanger 220 is relatively low, which can play a role in keeping the water temperature in the box 100 warm, which is beneficial to eliminating water temperature stratification, improving the uniformity of water temperature in the box 100, and achieving constant temperature water outlet.

[0066] In this embodiment, the cold water inlet 110 is located between the bottom heat exchanger 210 and the side heat exchanger 220 to avoid the cold water inlet 110 interfering with the bottom heat exchanger 210 and the side heat exchanger 220; in some embodiments, the cold water inlet 110 can be set between the two vertical pipes 221 of the side heat exchanger 220 to avoid interfering with the structural layout in the side heat exchanger 220.

[0067] Optionally, the box body 100 may also be provided with a sewage outlet, which is provided at the bottom of the box body 100 and is used to completely discharge the water in the box body 100 to prevent water from remaining in the box body 100 and breeding bacteria.

[0068] This embodiment also provides a water heater, which may be an air-energy water heater. The water heater includes the above-mentioned heating water tank to eliminate the problem of water temperature stratification, ensure that the outlet water temperature meets the use requirements, and eliminate the hidden danger of water outlet safety.

[0069] The water heater also includes an expansion valve, a compressor and an evaporator. The expansion valve, the evaporator, the compressor, the bottom heat exchanger 210 and the side heat exchanger 220 are connected in sequence, and the outlet end of the side heat exchanger 220 is connected to the expansion valve to form a circulation loop, wherein the bottom heat exchanger 210 and the side heat exchanger 220 form a condenser 200. The liquid working medium (heat exchange medium) evaporates into a gaseous state in the evaporator after passing through the expansion valve, and absorbs a large amount of heat energy from the air; the gaseous working medium is compressed by the compressor into a high-temperature, high-pressure liquid, and then enters the condenser 200 to release heat and heat the water, and the heat exchange medium passing through the condenser 200 returns to the expansion valve, and the cycle continues to work to provide hot water.

[0070] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A heating water tank, characterized in that: include: Box (100); A bottom heat exchanger (210) is arranged on the bottom surface of the box body (100), and the bottom heat exchanger (210) is provided with a bottom medium inlet end (211) for medium to enter and a bottom medium outlet end (212) for medium to flow out; A side heat exchanger (220), the side heat exchanger (220) covers at least a portion of the side wall of the box body (100), the side heat exchanger (220) is provided with a side medium inlet end, and the side medium inlet end is connected to the bottom medium outlet end (212).

2. The heating water tank according to claim 1, characterized in that: The bottom heat exchanger (210) includes a bottom coil, and the bottom coil covers at least a portion of the bottom surface of the box (100).

3. The heating water tank according to claim 2, characterized in that: The bottom coil extends spirally with the bottom medium inlet end (211) or the bottom medium outlet end (212) as the center; And / or, the bottom coil is a flat tube; And / or, the bottom coil is fixed to the box (100) by bonding with heat-conducting adhesive.

4. The heating water tank according to any one of claims 1 to 3, characterized in that: The side heat exchanger (220) comprises: A vertical pipe (221), the vertical pipe (221) being in communication with the bottom medium outlet end (212); A transverse communication structure, wherein the transverse communication structure extends around the circumference of the box body (100), and the transverse communication structure is connected to the vertical pipe (221).

5. The heating water tank according to claim 4, characterized in that: The transverse communication structure comprises a plurality of transverse tubes (222), the plurality of transverse tubes (222) being arranged in parallel around the circumference of the box body (100), and each of the transverse tubes (222) being connected to the vertical tube (221).

6. The heating water tank according to claim 4, characterized in that: The transverse connecting structure comprises a heat exchange tube group, the heat exchange tube group comprises a plurality of transverse tubes (222) connected in series or in parallel, the plurality of transverse tubes (222) are arranged in parallel around the circumference of the box body (100), and the heat exchange tube group is connected to the vertical tube (221).

7. The heating water tank according to claim 6, characterized in that: The heat exchange tube groups are provided with a plurality of groups, the plurality of groups of heat exchange tube groups are connected in series, and the heat exchange tube groups at the head and tail ends are respectively connected to the vertical pipe (221); Alternatively, the heat exchange tube groups are provided in a plurality of groups, and the plurality of groups of heat exchange tube groups are arranged along the length direction of the vertical tube (221), and each group of the heat exchange tube groups is connected to the vertical tube (221).

8. The heating water tank according to claim 4, characterized in that: Two vertical pipes (221) are provided, and the transverse communication structure is respectively connected to the two vertical pipes (221), and the two vertical pipes (221) are arranged at intervals; And / or, the top end or the bottom end of the vertical pipe (221) is in communication with the bottom medium outlet end (212).

9. The heating water tank according to any one of claims 1 to 3, characterized in that: The side heat exchanger (220) comprises a microchannel heat exchanger; Alternatively, the side heat exchanger (220) includes a side coil, and the side coil extends spirally around the circumference of the tank (100).

10. A water heater, characterized in that: Comprising a heating water tank as claimed in any one of claims 1 to 9.

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