CN212299424U - Module water heater - Google Patents

Abstract

The utility model belongs to the water heater field, in particular to module water heater. The water heater consists of a heating module and a heat storage module, and a heating unit, a control unit and other wearing parts are integrated in the heating module. The heat storage module comprises water tank, heat preservation, shell etc. the module that generates heat and heat storage module all are independent parts, the module that generates heat realizes dismantling and the combination through removable structure with the heat storage module, the module that generates heat constitutes the water heater wholly with heat storage module group together. The quick-wear parts and the durable parts of the water heater are respectively made into different modules, the different modules are independent parts, and the modules are combined through a structure easy to disassemble and assemble, so that low maintenance cost and low purchase replacement cost are realized.

Description

Module water heater

Technical Field

The utility model belongs to the water heater field, especially a module water heater.

Background

The traditional water heater with the water tank has large volume and troublesome assembly and disassembly, brings great problems to after-sale maintenance, and a manufacturer needs to establish a perfect after-sale network to ensure good after-sale service; in addition, when a certain part of the water heater is damaged after the guarantee period, the whole water heater is scrapped, the purchase cost is high, and the scrapped product wastes resources and pollutes the environment. Because the volume ratio of water storage formula water heater is bigger, when certain part damages, the consumer dismantles by oneself and takes the maintenance point maintenance to be impossible, need to maintain the back service staff and go to the door to serve, the labour cost is high, and the after-sales personnel are not in time to go to the door, or charge in disorder, also is not good for consumer's experience.

Simultaneously, traditional water heater of taking the water tank, the mainstream product can not realize instant heating effect, lead to the extravagant energy of long-term heat preservation, the long also influence of heating time is experienced simultaneously, knot incrustation scale scheduling problem also can not be solved, certainly there has already economical realization instant heating of a series of schemes, heat accumulation bimodulus effect, but this patent has not only inherited the bimodulus, does not knot incrustation scale scheduling problem, the after sale has been solved simultaneously, trade and buy the cost scheduling problem, simultaneously still strengthened heat exchange efficiency on the basis of utility model 'a bimodulus water heater', the noise problem of heating has been solved.

The water heater is characterized in that parts of the water heater are divided into a quick-wear part and a durable part, the quick-wear part is integrated into one part, the durable part is integrated into the other part, the two parts are combined through a structure easy to disassemble and assemble, and the combined water heater is a complete water heater. For example, the water tank is a durable part, and hardly causes problems in the life span. Especially the utility model discloses in adopt the scheme of heat transfer heating, because the pressure of running water is all born by the heat exchanger, the water tank can be made open form with plastics blowing integrated into one piece, need not bear running water pressure, only is used for storing heat energy, makes the water tank can reach 50 years's life-span even with PP plastics integrated into one piece, and the heat exchanger adopts the preparation of 316 stainless steel pipe, and the life-span also can reach more than 50 years in the running water. The electronic components, the heating components and the electric components are all easily damaged parts of the water heater, are integrally packaged in a shell to form a heating module, and the minimum volume of the heating module can be about 1.5 times that of a 500 ml mineral water bottle. The heating module and the heat storage module are assembled into a whole in an easy-to-disassemble and assemble mode to form a complete water heater, when parts in the heating module are damaged, a user can detach the whole module by himself and replace the module by himself at a dealer. When the water heater is damaged or replaced by a new one due to the service life, only a new heating module needs to be purchased, the heat storage module does not need to be replaced, money and trouble are saved, and the environment is protected.

Of course, by the present invention, one can easily think: the modularization is not limited to be divided into two parts, for example, the three parts of heat storage, heat generation and electronic control can be divided. However, this patent considers too many parts will increase the cost and also increase the fault point, so this patent from the practical perspective, it is practical that the water heater is made into two parts, the module of a plurality of parts, the utility model discloses do not embody in the claims, but can think easily through this patent, lack the creativity and can not bring the positive effect yet, regard as the scope of protection of the utility model.

SUMMERY OF THE UTILITY MODEL

For solving the deficiencies of the prior water heater technology, the utility model provides a new technical scheme.

The purpose of the utility model is solved by the following technical solutions:

the utility model provides a module water heater, includes module, the heat accumulation module of generating heat, the module of generating heat contains heating element 1, the control unit 2, the heat accumulation module contains water tank 3, heat preservation 4, the module of generating heat and heat accumulation module all are independent part, the module of generating heat and heat accumulation module realize dismantling and combining through detachable construction, the module of generating heat constitutes the water heater wholly with heat accumulation module is in the same place.

Furthermore, interfaces are arranged on the heating module and the heat storage module, the interfaces are communicated together to form a water flow channel of the heating module and the heat storage module, and the heating module heats heat storage media in the heat storage module through natural convection or forced convection.

Further, the heating unit comprises a heater 7, a heater shell 8 and a secondary heat exchanger 9, the heater and the secondary heat exchanger are assembled in the heater shell, the heat storage module further comprises a primary heat exchanger 10, the primary heat exchanger is arranged in the water tank 3, and the water outlet end of the primary heat exchanger is connected with the water inlet end of the secondary heat exchanger through a detachable structure.

The heating module is equipped with cold water joint 11, hot water joint 12, convection current interface 22, on the heater shell is connected to convection current interface one, convection current interface 22 is one or more, the heat accumulation module still includes convection current interface two 23, on convection current interface two is connected to water tank 3, constitute the passageway of the heat accumulation module convection current heat transfer with the heat accumulation module after convection current interface one is connected with convection current interface two.

The heating module is provided with a first circulating water inlet interface 13, a first circulating water outlet interface 14, a cold water joint 11, a hot water joint 12 and a pump 15, the pump is connected between the first circulating water inlet interface 13 or the first circulating water outlet interface 14 and the heating unit 1, the heat storage module is provided with a second circulating water inlet interface 16 and a second circulating water outlet interface 17, the second circulating water inlet interface and the second circulating water outlet interface are connected to the water tank 3, and the second circulating water outlet interface, the first circulating water inlet interface, the pump, the heating unit, the first circulating water outlet interface and the second circulating water inlet interface form a circulating loop of the water heater.

The convection control device is used for controlling the on, off and strength of a convection heating channel of the heating module and the heat storage module, the convection control device is an electric device or a thermal expansion element 31 drives a movable part to control the size of the convection channel, and the rotating speed of the pump 15 can be controlled by an electronic module.

The water heater is characterized by further comprising a pump 15, a flow distribution mechanism 18 and a spray pipe 19, wherein a circulating water inlet connector I13, a circulating water outlet connector I14, a cold water connector 11, a hot water connector 12 and a spray pipe connector I20 are arranged on the heating module, the pump is connected between the circulating water inlet connector I13 and the heating unit, a circulating water inlet connector II 16, a circulating water outlet connector II 17 and a spray pipe connector II 21 are arranged on the heat storage module, the circulating water inlet connector II and the circulating water outlet connector II are connected onto the water tank 3, the circulating water outlet connector II, the circulating water inlet connector I, the pump, the heating unit, the circulating water outlet connector I and the circulating water inlet connector II form a circulating loop of the water heater, the flow distribution mechanism 18 comprises three connectors and is assembled at the water outlet end of the pump, the other two connectors are respectively connected with the heating unit and the spray pipe connector I20, the spray pipe 19 is arranged on the second spray pipe connector 21, and the position and the shape of a water outlet of the spray pipe are beneficial to enhancing the heat exchange efficiency of the first-stage heat exchanger 10.

The heating module is provided with a first circulating water inlet interface 13, a first circulating water outlet interface 14, a cold water joint 11 and a hot water joint 12, the pump is connected between the first circulating water inlet interface or the first circulating water outlet interface and the heating unit, the second circulating water inlet interface 16 and the second circulating water outlet interface 17 are arranged on the heat storage module, the second circulating water inlet connector and the second circulating water outlet connector are connected to the water tank 3, the second circulating water outlet connector, the first circulating water inlet connector, the pump, the heating unit, the first circulating water outlet connector and the second circulating water inlet connector form a circulating loop of the water heater, one end of the bypass pipe 25 is connected with the pump, the other end of the bypass pipe is connected with the heating module, the position on the heating module is located at the far end connected with the heating module and the pump, and the flow distribution mechanism is used for adjusting the flow proportion of the bypass pipe 25 and the circulation interface.

The heat storage module is characterized by further comprising an electrifying protection mechanism, and the electrifying protection mechanism enables the heating module to be assembled on the heat storage module and then triggers the switch to be electrified to work in a mechanical mode, an electromagnetic mode, a capacitance mode and the like.

The heating module is fixed with one end of the heat storage module through a buckle, and the other end of the heating module is fixed through threads.

Advantageous effects

The utility model discloses a modular water heater has not only inherited advantages such as instantaneous heat storage bimodulus, not knot incrustation scale, utilizes the modular thinking to solve the problem of after-sales maintenance simultaneously, makes the durable part of water heater needn't scrap at the same time, and the cost of trading is low, saves social resource, has very much the popularization meaning.

Drawings

The present invention will be further explained with reference to the drawings and examples

FIG. 1 is a schematic diagram of a natural convection structure

FIG. 2 is a schematic diagram of a heat generating module

FIG. 3 is a schematic view of a thermal storage module

FIG. 4 is a schematic diagram of a natural convection structure

FIG. 5 is a schematic view of a natural convection structure

FIG. 6 is a schematic view of a scale-free natural convection structure

FIG. 7 is a schematic view of a scale-free natural convection structure

FIG. 8 is a schematic view of a scale-free natural convection structure

FIG. 9 is a schematic diagram of a forced convection structure

FIG. 10 is a schematic diagram of a forced convection structure

FIG. 11 is a schematic diagram of a forced convection structure III

FIG. 12 is a schematic diagram of a forced convection structure

FIG. 13 is a schematic diagram of a forced convection structure

FIG. 14 is a schematic view of a scale-free forced convection structure

FIG. 15 is a schematic view of a scale-free forced convection structure II

FIG. 16 is a schematic view of a scale-free forced convection structure

FIG. 17 is a schematic view of a scale-free forced convection structure

FIG. 18 is a schematic view of a scale-free forced convection structure

In the figure:

1. the heating device comprises a heating unit 2, a control unit 3, a water tank 4, a heat-insulating layer 5, a heating module shell 6, a heat storage module shell 7, a heater 8, a heater shell 9, a secondary heat exchanger 10, a primary heat exchanger 11, a cold water joint 12, a hot water joint 13, a first circulating water inlet joint 14, a first circulating water outlet joint 15, a pump 16, a second circulating water inlet joint 17, a second circulating water outlet joint 18, a flow distribution mechanism 19, a spray pipe 20, a first spray pipe joint 21, a second spray pipe joint 22, a first convection joint 23, a second convection joint 24, a hot water extension pipe 25, a bypass pipe 26, a chimney pipe 27, a first cold water joint 28, a second cold water joint 29, a first hot water joint 30, a second hot water joint 31, a thermal expansion element 32, a thermal expansion element shell 33, a, Heating disc 37, heating disc shell 38, first heat exchanger interface 39, second heat exchanger interface 40, firm screw 41, firm nut 42, window 43, key 44, magnetic induction element 45, magnet 46 and one-way valve

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be further explained with reference to the drawings and examples.

Example one

Fig. 1 to 5 are schematic structural views of a water heater according to a first embodiment of the present invention, which is a modular water heater solution specifically for natural convection. Fig. 2 is a schematic view of a heat generating module, fig. 3 is a schematic view of a heat storage module, and fig. 1, 4 and 5 are structural schematic views of the combination of the heat generating module and the heat storage module.

As shown in fig. 1, the heating module is mounted at the bottom of the heat storage module, the two convection interfaces one 22 on the heating module are inserted into the convection interface two 23 of the heat storage module, and the cold water interface one 27 on the heating module is inserted into the cold water interface two 28 of the heat storage module. The two first convection interfaces 22 are connected to the shell of the heating unit 1 and can be fixed in a threaded connection or welding mode, and the two second convection interfaces are fixed at the bottom of the water tank 3 in a threaded connection or welding mode. The heating unit for natural convection heat transfer in fig. 1 may be a steel cup heater, a thick film heater, an electromagnetic heater, etc. with a certain water capacity, and if a pipeline type cast aluminum heater is adopted, the natural convection mode cannot be used. When water in the water tank needs to be heated, the electric heating element in the heating unit 1 works to heat a small amount of water in the heating unit 1, the density of the hot water is lower, the hot water floats to the upper part of the water tank through the convection interface, heat is transferred to the water tank in the floating process of the hot water, and cold water in the water tank sinks into the heating unit through the convection interface to be heated due to higher density, so that natural convection heat transfer is formed. A chimney pipe 26 is further arranged on one convection interface II, and the chimney pipe 26 has two functions: 1. when the heating unit 1 is heated, hot water of the heating unit floats upwards, the water temperature in the chimney pipe is higher than that in the water tank, the pressure of water inside and outside the pipe at the bottom is different due to density difference, so that a suction effect is formed, directional circulation is formed when the heating unit 1 heats water in the water tank 3, cold water flows into the heating unit from a convection interface without the chimney pipe and flows out of the chimney pipe, and the suction force is overlarge as the length is longer under the condition of proper pipe diameter (the heat transfer of the pipe wall cannot be too good, and the water temperature inside the pipe must be kept higher than the outside); 2. when the water heater is supplied with water, cold water flows into the bottom of the water tank 3 from the cold water joint 11, and hot water is pressed into the heating unit 1 from the chimney 26. When the water heater in fig. 1 supplies water to the outside, water in the water tank 3 flows into the heating unit 1 through two paths, one path is hot water at the top of the water tank, the other path is water at the bottom of the water tank, when the water in the water tank is in a preheating state, the water flowing into the heating unit is cold and hot mixed, and the heating unit can work in advance without overtemperature. The hot water joint of fig. 1 is connected to the heating unit, and the structure can realize the effect of instant heating and opening.

In the drawings, such as a temperature sensor, a water outlet, a water flow switch and the like are not shown, mainly for the sake of clarity, all the drawings of the patent only show the structure related to the technical innovation, and the necessary components of the known technology are not shown, and thus the description is given.

Fig. 2 is a front view and a top view of the heating module, the front view shows a window 22 of the heating module, the window displays information related to the working state such as the temperature of the water heater, and a row of keys 43 are provided, and the user sets the parameters of the water heater by operating the keys. The top of the front view is provided with three connectors, namely two convection connectors one 22 and a hot water connector one 29, each connector is provided with three grooves for assembling rubber rings, when the three connectors are inserted into the heat storage module, the three rubber rings are sealed to prevent water leakage, and any number of rubber rings can be adopted. In the actual product, do one bit tapering to three interfaces and can be more favorable to assembly and sealed, under the tapered condition, can join in marriage more tightly when the module that generates heat inserts the heat accumulation module more, at last through the powerful locking of screw formation more effective sealed. The lower part of the front view is provided with a cold water joint 11 and a hot water joint 12 which are used for connecting external cold and hot water pipelines. The hot water joint 12 and the hot water joint 29 can be two ends of a part, and as the hot water joint 12 and the hot water joint 29 in the figure are not connected with the heating unit, the two parts can be completely and directly connected to the heat storage module in an actual product, so that one refute joint is omitted, and failure points are reduced. In the plan view of fig. 2, the control unit 2 is assembled in the heat generating module case 5, and the control unit integrates functional modules such as a window 42 and a key 43, and includes a power module, a switch module, a sensing module, and the like, which together form the whole control unit. Fastening screws 40 are distributed at both ends of the heat generating module, and fastening nuts 41 screwed into the heat storage module lock the two modules together. In an actual product, a scheme that one end of the clamp is buckled and the other end of the clamp is locked by a screw may be adopted; or one end of the fixing buckle is fixed, and the other end of the fixing buckle is movable; or both ends all adopt movable buckle, follow-up three kinds of schemes are more favorable to dismantling, are the scheme of more superior grade in the actual product, are only in order to simplify the utility model discloses an attached drawing, so these ripe well-known structural schemes do not show. Magnetic induction element 44 is the tongue tube, elements such as hall switch, the assembly is at the internal surface that heating module shell 5 and thermal storage module laminating, when two module assembly are in the same place, sense magnet 45 on the thermal storage module, thereby switch on and make the thermal storage module can the switch on, this is for preventing that the user from not installing the thermal storage module on, or do not install and just insert the electricity and use in place, lead to some potential risks, this structure also can adopt the mechanism to trigger, electric capacity triggers, infrared triggering mode etc. but here uses magnetism to trigger more for excelling in, magnetism triggers need not be at the surperficial trompil of shell, also need not transparently.

Fig. 3 is a schematic view of a thermal storage module, i.e., a water tank having an insulating layer, in which pipe members or heat exchange pipes are installed, which are not easily damaged. The lower part is provided with a plurality of interfaces 23 and 30 matched with the heating module, a nut 41 for assembling and fixing, and a magnet 45 for assembling induction of the two modules, which are not described much.

Fig. 4 is substantially the same as fig. 1, except that the cold water flows in from the heating unit, the hot water flows out from the water tank through the hot water extension pipe 24, and the instant heating cannot be realized, and the water in the water tank must be heated first to use the hot water.

Fig. 5 shows a natural convection scheme of electromagnetic heating, since the heating plate of electromagnetic heating belongs to a durable part and is made of ferromagnetic stainless steel without possibility of damage, so that the heating plate can be assembled in a heat storage module. In the figure, the electromagnetic coil 35 and its control unit are assembled in the heating module, the heating plate 36 is assembled in the heating plate housing 37, the heating plate housing 37 is assembled at the bottom of the water tank 3, the top of the heating plate housing has an opening for heat convection with the water in the water tank 3, the heating plate housing 37 is also assembled with a convection control mechanism, the convection control mechanism is composed of a thermal expansion element 31, a thermal expansion element housing 32, a spring 33 and a sealing cover 34, and the working principle is as follows: when the water temperature in the heating disc shell is lower than the set temperature, the thermal expansion element is in a closed state, the sealing cover blocks the convection opening of the thermal expansion element shell under the action of the spring force, so that the water heater only heats a small amount of water in the heating disc shell 37, and the effect of instant heating is realized; when the water temperature in the heating disc shell exceeds the set temperature, the thermal expansion element is opened, the water in the heating disc shell and the water in the water tank 3 carry out heat convection, the opening degree is determined according to the water temperature, and the strength of the heat convection is automatically adjusted. When the temperature of the water in the heating disc housing drops below a set temperature, the thermal expansion element is reset under spring force. When the water inlet temperature is high, the water tank 3 does not need to be heated, the water tank is directly opened and heated instantly, the water tank is equivalent to an instant water heater, when the water inlet temperature is low in winter, the water tank stores heat, and hot water enters the pipeline of the heating plate 36 through the hot water extension pipe 24 and is secondarily heated and then flows out of the hot water joint 12. Certainly, although the thermal expansion element is a pure mechanical part, the probability of problems occurring in the service life is low, the service life of the thermal expansion element is far shorter than that of the heating plate and the plastic water tank, so that a convection control mechanism can be eliminated, and the capacity increasing effect can be partially realized only by controlling the size of the convection heat exchange aperture of the heating plate shell. The heating disc shell can be cancelled, and the using effect of the water heater is the same as that of the common water storage type. Adopt electromagnetic heating, if the dish that generates heat is put in the water tank, then rivers need not through the module heating of generating heat, can not use the interface between this kind of scheme heating module and the heat accumulation module, cold water joint 11, hot water joint 12 all directly fixed on the heat accumulation module, the module that generates heat has only seted up the through-hole and has let these two joints pass, of course, the module that generates heat also can avoid the position of two joints. The principle in the actual product is that the fewer the interfaces, the better the appearance and the function are ensured.

Example two

Fig. 6, 7 and 8 are schematic structural diagrams of a second embodiment, which is a solution of a modular water heater using heat exchange technology to solve the problems of scale, corrosion of a water tank and life span, and a natural convection heating method is also used in the present embodiment.

As shown in fig. 6, a primary heat exchanger 10 is installed in the heat storage module, a second cold water port 28 is arranged at a water inlet end of the primary heat exchanger, the primary heat exchanger in the figure is a tubular heat exchanger, and heat exchanger structural forms such as a tube fin type heat exchanger can be adopted according to needs, so that a more appropriate heat exchanger structure is selected according to the comprehensive cost and efficiency. The water outlet end of the primary heat exchanger 10 is connected with a second heat exchanger connector 39. The second cold water port 28 and the second heat exchanger port 39 can be connected to the heat exchanger in a welding or threaded connection mode. If the tubular heat exchanger adopts a corrugated pipe, one end of the corrugated pipe can be compressed into a buckle, and the buckled corrugated pipe can be connected by threads and other more ways, which is a common operation way. Since the tap water pressure can be borne by the heat exchanger, the water tank 3 does not need to bear the tap water pressure, the water tank can be formed by plastic blow molding, a through hole is formed in the bottom or the top, the primary heat exchanger 10 can be installed by the size of the through hole, the through hole is sealed by a water tank cover (the water tank cover is not shown in the schematic diagram), the water tank cover can be made of the same plastic material as the water tank, and the water tank cover are welded together by an induction welding technology or a laser welding technology. If the heat exchanger can not ensure that the problem does not occur absolutely in the life cycle (in fact, the service life of about 50 years can be ensured by using a 316 stainless steel pipe which is slightly thicker in tap water), the water tank cover and the water tank can be sealed by adopting rubber and fastened by screws. If the water tank cover is arranged at the bottom of the water tank 3, the heat exchanger is fixed on the water tank cover, and the interface can be the structure of the water tank cover. As shown in fig. 6, the heat storage module is further provided with a second convection interface 23, which is different from the first embodiment in that only one convection interface is provided, and a plurality of convection interfaces may be provided according to a test result. The reason is that in the first embodiment, the water tank needs to bear the pressure of running water, the interface is too large and is not sealed, the pressure at the bottom of the water tank is only the self weight of the content medium by adopting a heat exchange scheme, and the convection interface can be a kidney-shaped large opening without worrying about sealing.

As shown in fig. 6, the heating unit is composed of a heater 7, a heater shell 8, and a secondary heat exchanger 9, where the heater shell 8 is generally composed of two parts, such as an upper shell and a lower shell, and after the internal components are assembled, the upper shell and the lower shell are assembled together and fastened by using rubber ring sealing screws to form a sealed heating unit assembly. The water inlet end of the secondary heat exchanger 9 is connected with a first heat exchanger interface 38 which can be a structure on the heater shell 8, and the specific structure of an actual product is comprehensively considered from the aspects of production process, cost, fault points and the like. The water outlet end of the secondary heat exchanger 9 is connected with a hot water joint 12. The convection interface I22 is a structure on the heater shell and is provided with a sealing ring installation groove. As described above, the cold water connection 11 may be directly connected to the heat storage module, which is not described in more detail.

Fig. 7 is added with a convection control mechanism on the basis of fig. 6, so as to realize the dual-mode effect of instant heating and heat storage and the capacity increasing effect in the heat storage mode. This mechanism is illustrated as a mechanical element, consisting of a thermal expansion element 31, a spring 33, a sealing cover 34, the spring 33 not being shown in this illustration, but this is an essential element. As shown, the thermal expansion element is located against one end of the sealing cover 34 for the purpose of amplifying the ejection action of the thermal expansion element, the sealing cover being of a hinged construction and the spring may be in the form of a torsion spring which opens like a door when the thermal expansion element is actuated. The operation principle of the flow control mechanism is described in the first embodiment, and is not repeated.

Fig. 8 is the addition of a primary heat exchanger 10 to fig. 5 for the purpose of solving scaling and tank corrosion, explosion and life problems. The heating plate 36 is made of tubular ferromagnetic material, and is a part of the heater and a heat exchanger at the moment, and the water inlet end of the heating plate 36 is connected with the water outlet end of the primary heat exchanger 10.

EXAMPLE III

Fig. 9 to 13 show a part of a modular water heater with forced convection, which differs from the natural convection in that a pump 15 is added, and the advantage of forced convection is that the installation position of the heating module is not necessarily limited to the bottom of the heat storage module, such as the top in fig. 13, which is useful in some occasions, such as a small kitchen appliance, because it is placed under a faucet and the interface is just connected to the top; for a horizontal water heater, the heating module is more attractive when being placed at the left end and the right end of the water heater. In addition, forced convection is more beneficial to controlling the convection strength, and improves the working conditions of the heater, such as low convection speed, high surface temperature of the heater, and insufficient convection dead water area, which generates local high temperature, in natural convection. The natural convection interface requires a large enough caliber, and the position, size, shape and flow length of the interface are all studied, so that the heater has a friendly working environment, and the structural design is limited. The natural convection can not adopt a pipeline type cast aluminum heater, and the heating unit is required to have a certain water capacity space, and the cast aluminum heater is the best heater at present. It should be noted that, in all the solutions of forced convection in this patent, a rotation speed control module of the pump 15 may be added to adjust the water flow of the circulating heating according to the temperature of the heating unit.

As shown in fig. 9, the heating module includes a heating unit 1, a pump 5, a first circulating water inlet port 13, a first circulating water outlet port 14, a first cold water port 27, a first cold water port 11, and a hot water port 12, in which a water suction port of the pump 5 is connected to the first circulating water inlet port 13, and a water outlet is connected to the heating unit 1, that is, the pump is assembled at a water inlet end of the heating unit. This is equipped with two purposes: 1. the water suction pipe of the pump cannot be too thin, otherwise, the water quantity is very small, and if the heating unit 1 adopts a cast aluminum heater, the pump is preferably arranged at the water inlet end of the heating unit; 2. The water temperature that the pump dress flows through at the unit that generates heat intake is lower, is favorable to protecting the pump, and the dress is higher because water can be higher through the unit heating temperature that generates heat in the unit play water end that generates heat, and the coil of pump is overheated easily. Of course, it is within the scope of this patent to mount the pump 5 at the water outlet end of the heat generating unit. Three interfaces on the heat storage module are matched with the heating module, and a hot water extension pipe 24 is further arranged on the second circulating water inlet interface 16 of the heat storage module. The working mode of the water heater is as follows: when the temperature of the water tank 3 is lower than a preset value, the pump 5 and the heating unit 1 are started to work, the impeller of the pump rotates to press water into the heating unit 1, the heated water enters the hot water extension pipe 24 through the circulating water outlet connector I14 and then enters the water tank, the water in the pump is pressed out by the impeller to form vacuum in the pump body, the water in the water tank enters the pump through the circulating water inlet connector I13 under the self-gravity and the atmospheric pressure, continuous heating internal circulation is formed in the way, and the heating circulation stops until the water temperature in the water tank reaches the preset value or other limited conditions. When the water heater supplies water to the outside through the hot water joint 12, cold water flows in from the cold water joint 11, a water flow sensing unit mounted on a pipe of the cold water joint senses a water flow event, if a pump is in a working state, the working is stopped immediately, the heating unit 1 determines whether to work according to data of a temperature sensor arranged on the heating unit, and adjusts the power of the heating unit according to the temperature. The water in the water tank enters the heating unit 1 through the hot water extension pipe 24 and the first circulation water inlet connector 13. The water flow sensing unit and temperature sensor are not shown in the drawings and one skilled in the art will know which sensor to select and where to install. Because hot water flows out of the heating unit, the structure of fig. 9 can realize two modes of instant heating and heat storage, the water temperature is kept constant for a long time, and the upper and lower water flows of the water tank enter the heating unit, so that the heating unit can be heated as early as possible, and the capacity increasing effect is realized. For example, when the water in the water tank is at 80 degrees, if the water can only flow into the heating unit through the hot water extension pipe 24, the heating unit can not work for a long time, and when the water is still fed into the lower part of the water tank, the cold water flows into the bottom of the water tank, so that the water entering the heating unit is mixed with the cold water, and the heating unit can start to work immediately.

Fig. 10 is a solution with one less port than that in fig. 9, and the circulating water inlet port shares the first cold water port, which is better than the solution in fig. 9.

Fig. 11 changes the flow direction of the pump 15 on the basis of fig. 10, in order to avoid the cold and hot mixed water entering the heating unit, the pump 15 of this installation mode contains a one-way valve plate inside, which does not allow the water flow to pass through reversely, at this time, the water entering the heating unit 1 can only flow in from the hot water extension pipe 24, and the hot water extension pipe 24 may need to use a pipe with a thicker pipe diameter to ensure the flow rate of the pump.

The hot water connector 12 of fig. 12 is not connected to the heating unit 1, and the pipeline between the first cold water connector 27 and the pump connection part is provided with the check valve 46, so that the instant heating effect cannot be realized, but the advantage is that even if the water temperature of the water tank reaches the highest set value, the heating unit can be started to work as long as water is supplied outwards, and in the process of using hot water, cold water flows into the heating unit, so that the working condition of the heater is relatively better. The structure can also be used for eliminating the one-way valve 46, tap water flows into the water tank by two paths from the cold water joint 11, the water amount flowing into the heating unit is possibly too small, so that the full-power work cannot be realized, the water supply time of the water heater is shortened, and the pump 15 is required to start circulating heating at the moment. The addition of a one-way valve is a more preferred solution in comparison.

Fig. 13 the heating module is placed on top of the heat storage module, and the forced circulation is adopted, so that the water heater is placed to work in the same way as the previous scheme, and the structure is suitable for small kitchen wares. All configurations of this patent that employ forced convection can be modified to this form.

Example four

Fig. 14 to 18 are schematic structural diagrams of a fourth embodiment, which is a partial structural form of a water-scale-free solution of the modular water heater adopting forced convection, and like the second embodiment, the fourth embodiment also aims to solve the problems of no scale formation, no corrosion and explosion of the water tank and prolonged service life of the water tank. Having described the first three embodiments in detail, this embodiment will be understood by reference to the brief description.

As shown in fig. 14, which is a combined structure of the second and third embodiments, the pump 15 is used to realize forced circulation heating instead of natural convection heating, so that there are two heating modes, namely heating mode and heat storage mode, and there is an effect of volume increase, the water tank 3 is only used for storing hot water, and water in the water tank cannot flow out from the hot water joint 12. Tap water flows into the first-stage heat exchanger 10 from the cold water joint 11, and flows into the second-stage heat exchanger in the heating unit for second-stage heating after primary heat exchange. The water flow in the water tank is driven by the pump 15 to flow through the heater shell 8 to be circularly heated. And will not be described much.

As shown in fig. 15, a mechanical convection control mechanism is added, which is composed of a thermal expansion element 31, a spring 33 and a sealing cover, not shown, and works in the following manner: when the water temperature in the heater shell 8 is lower than the set temperature, the thermal expansion element 31 is in a contraction state, the first circulating water outlet port 14 is covered by the sealing cover, the pump 15 cannot form circulation when running, at the moment, the heater 7 only heats a small amount of water in the heater shell, and tap water flows out after being heated by the secondary heat exchanger 9, so that the instant heating effect is achieved; when the water temperature in the heater shell 8 is higher than a set value, the medium in the thermal expansion element 31 begins to expand and pushes out the push rod, the sealing cover is pushed to move to open the through hole of the first circulating water outlet port 14, and circulating heating is started under the action of the pump. The push rod strokes of the thermal expansion elements are different at different temperatures, the higher the temperature is, the larger the stroke is, so that the size of a circulating channel is controlled according to the temperature, and the circulating strength is automatically controlled. Of course, the intensity of the cycling can also be controlled by electronically controlling the speed of the pump. The purpose of controlling the cycle strength is to maintain a suitable temperature within the heat generating unit 1 to achieve good instant heating and compatibilization effects. For example, when the temperature of water in the heating unit 1 is 60 degrees, the outlet water temperature can be ensured to reach 42 degrees, and the temperature must be ensured to be below 60 degrees during design, the pump does not work or the flow control mechanism closes the circulation channel, and the heat of the heater is not diffused into the water tank, so that a good instant heating effect is realized.

Fig. 16 is a view showing a bypass pipe 25 in addition to fig. 15, wherein the bypass pipe is connected with the water suction end of the pump 15 and the water outlet end of the heating unit 1, and conversely, the pump is arranged at the water outlet end of the heating unit, and one end of the bypass pipe is connected with the water outlet end of the pump, and the other end of the bypass pipe is connected with the water inlet end of the heating unit. The flow control mechanism in fig. 15 plays a role in flow distribution in fig. 16, the thermal expansion element 32 and the spring 33 are all the same, the sealing cover 34 has a different structure, in fig. 16, the sealing cover needs to adjust the opening degrees of the two holes simultaneously, when the first circulating water outlet port 14 is closed, the opening of the bypass pipe connected to the heating unit is all opened, at this time, the pump 15 drives water flow to circulate in the heating unit, the convection heat exchange effect of the secondary heat exchanger is greatly enhanced, and the water temperature in the whole heating unit is also uniform. When the opening of the first circulating water outlet port 14 is fully opened, the water temperature in the heating unit is proved to be too high, the opening of the bypass pipe is closed, and the water flow circulates between the heating unit 1 and the water tank. When the sealing cap 34 is in the middle of the above two states, the two cycles are performed simultaneously. This solution adds only one bypass pipe, but it brings about remarkable good effect, the bypass pipe 25 in the figure is outside the heater shell, in the actual product, in order to simplify the structure and avoid excessive heat dissipation, the hole can be designed on the heater shell 8 directly, and then it is only necessary to connect to one end of the pump with a shorter pipe.

Fig. 17 is a scheme for enhancing the primary heat exchange efficiency, in which a flow distribution mechanism 18 is added on a pipeline connecting a pump and a heating unit, the flow distribution mechanism 18 has three interfaces, two of the interfaces are connected with the pump and the heating unit 1, the other interface is a nozzle interface one 20, the flow distribution mechanism can be an electric mechanism, the opening degree of a valve of the flow distribution mechanism is determined according to the water temperature in the heating unit, and the flow distribution mechanism can also be a mechanism driven by a mechanical thermal expansion element, and the thermal expansion element only needs to be installed at a proper temperature sensing position. A nozzle 19 is also installed inside the water tank 3, and the position and the shape of the nozzle are determined according to the position and the shape of the heat exchanger, so that the pump 15 is used for driving water flow to forcibly enhance the heat exchange efficiency of the primary heat exchanger. Water is a poor heat conductor, the speed of natural convection is very low, the buoyancy of the water can be calculated by utilizing the density of the water at different temperatures, so that the acceleration of the natural convection of the water is calculated, and the heat exchange efficiency of the natural convection is very low through theoretical calculation. In the heating unit 1, because the electric heating tube heats the water on the surface of the electric heating tube to reach the boiling point, a large amount of bubbles are generated, and the effect of strong convection is achieved in a small space, the efficiency of secondary heat exchange is relatively high, but the condition is not existed in primary heat exchange, and the good heat exchange efficiency depends on the convection strength of a medium. The working mode is as follows: when the water temperature in the heater shell 8 is lower than the set temperature, the flow distribution mechanism 18 closes the channel connected with the heating unit, the channel of the spray pipe is fully opened, and the pump drives water flow to be sprayed out from the spray pipe 19, so that the water around the primary heat exchanger flows rapidly, and the heat exchange efficiency is enhanced; when the water temperature in the heater shell is higher than the set temperature, the flow distribution mechanism adjusts the opening size of the channel connected with the heating unit 1 according to the temperature value, and the opening is larger when the temperature of the heating unit is higher. If the pump has a sufficiently large flow rate, we can design that even if the channel connecting the heat generating unit is fully open, some water will still flow through the nozzle. In the figure, the nozzle is a simple pipe, and the actual product is not limited to such a structure that a cross pipe is connected to the nozzle, and the cross pipe is opened like a flute so that the sprayed water flows around the heat exchanger in an optimal state. The structure of the water heater well accords with the use logic of the water heater, for example, when the temperature of water in the liner is reduced in winter, water in the heating unit does not flow into the water tank in a circulating mode, the power of the heater is absorbed by water flowing in the first-stage heat exchanger and flows out, the flow of the pump is sprayed out from the spray pipe to enhance the heat exchange efficiency of the first-stage heat exchanger, therefore, heat in the water tank can be effectively squeezed, when the power of the heater is 5.5 kilowatts and the temperature of the water tank is 25 ℃, 42-degree hot water can be provided under the condition that the flow is 3.5 liters, the utilization rate of the hot water is far higher than that of a common electric water heater, and a better. In addition, when the water temperature is high in the spring, summer and autumn without preheating the water tank, the pump does not work, the heating unit works by water supply according to the information of the water flow switch, and the water is turned off and stops working.

Fig. 18 shows a combination of the solutions of fig. 15 and 17, in which the section of the water inlet channel of the nozzle is not controlled, but only the section of the circulation flow channel of the heat generating unit 1, in such a way that it is used in the case of very high flow rates of the pump, and this will not be described much.

The above examples are not intended to be exhaustive of all structures and methods, and combinations of all aspects described above, and any aspect which can be readily devised by the present invention, are within the scope of the invention.

Claims (10)

1. A modular water heater, characterized in that: including module, the heat accumulation module of generating heat, the module of generating heat contains heating unit (1), the control unit (2), the heat accumulation module contains water tank (3), heat preservation (4), the module of generating heat and heat accumulation module all are independent part, the module of generating heat realizes dismantling and combining through detachable construction with the heat accumulation module, the module of generating heat constitutes the water heater wholly with the heat accumulation module is in the same place.

2. A modular water heater as claimed in claim 1, wherein: the heating module and the heat storage module are provided with interfaces which are communicated together to form a water flow channel of the heating module and the heat storage module, and the heating module heats heat storage media in the heat storage module through natural convection or forced convection.

3. A modular water heater as claimed in claim 1 or 2, wherein: the heating unit comprises a heater (7), a heater shell (8) and a secondary heat exchanger (9), the heater and the secondary heat exchanger are assembled in the heater shell, the heat storage module further comprises a primary heat exchanger (10), the primary heat exchanger is arranged in the water tank (3), and the water outlet end of the primary heat exchanger is connected with the water inlet end of the secondary heat exchanger through a detachable structure.

4. A modular water heater as claimed in claim 1 or 2, wherein: the heating module is equipped with cold water joint (11), hot water joint (12), convection current interface (22), on the heater shell is connected to convection current interface one, convection current interface one (22) are one or more, the heat accumulation module still includes convection current interface two (23), on convection current interface two is connected to water tank (3), constitute the passageway of the module that generates heat and heat accumulation module convection current heat transfer after convection current interface one is connected with convection current interface two.

5. A modular water heater as claimed in claim 1 or 2, wherein: the heating module is provided with a circulating water inlet interface I (13), a circulating water outlet interface I (14), a cold water joint (11), a hot water joint (12) and a pump (15), the pump is connected between the circulating water inlet interface I (13) or the circulating water outlet interface I (14) and the heating unit (1), the heat storage module is provided with a circulating water inlet interface II (16) and a circulating water outlet interface II (17), the circulating water inlet interface II and the circulating water outlet interface II are connected to the water tank (3), and the circulating water outlet interface II, the circulating water inlet interface I, the pump, the heating unit, the circulating water outlet interface I and the circulating water inlet interface II form a circulating loop of the water heater.

6. The modular water heater of claim 1 or 2, wherein: the convection control device is characterized by further comprising a convection control mechanism, wherein the convection control mechanism is used for controlling the on/off and the strength of a convection heating channel of the heating module and the heat storage module, and the convection control mechanism is an electric or thermal expansion element (31) driving a movable piece to control the size of the convection channel or adopts an electronic module to control the rotating speed of the pump (15).

7. The modular water heater of claim 3, wherein: the water heater is characterized by further comprising a pump (15), a flow distribution mechanism (18) and a spray pipe (19), wherein a circulating water inlet interface I (13), a circulating water outlet interface I (14), a cold water joint (11), a hot water joint (12) and a spray pipe interface I (20) are arranged on the heating module, the pump is connected between the circulating water inlet interface I (13) and the heating unit, a circulating water inlet interface II (16), a circulating water outlet interface II (17) and a spray pipe interface II (21) are arranged on the heat storage module, the circulating water inlet interface II and the circulating water outlet interface II are connected onto the water tank (3), the circulating water outlet interface II, the circulating water inlet interface I, the pump, the heating unit, the circulating water outlet interface I and the circulating water inlet interface II form a circulating loop of the water heater, the flow distribution mechanism (18) comprises three interfaces, the three interfaces are assembled at the water outlet end of the, the flow distribution mechanism adjusts the flow proportion of the heating unit and the spray pipe flowing through according to the working condition, the spray pipe (19) is installed on the second spray pipe connector (21), and the position and the shape of a water outlet of the spray pipe are beneficial to enhancing the heat exchange efficiency of the first-stage heat exchanger (10).

8. The modular water heater of claim 3, wherein: the water heater is characterized by further comprising a pump (15), a bypass pipe (25) and a flow distribution mechanism (18), wherein a circulating water inlet interface I (13), a circulating water outlet interface I (14), a cold water joint (11) and a hot water joint (12) are arranged on the heating module, the pump is connected between the circulating water inlet interface I or the circulating water outlet interface I and the heating unit, a circulating water inlet interface II (16) and a circulating water outlet interface II (17) are arranged on the heat storage module, the circulating water inlet interface II and the circulating water outlet interface II are connected onto the water tank (3), the circulating water outlet interface II, the circulating water inlet interface I, the pump, the heating unit, the circulating water outlet interface I and the circulating water inlet interface II form a circulating loop of the water heater, one end of the bypass pipe (25) is connected with the pump, the other end of the bypass pipe is connected onto the heating, the flow distribution mechanism is used for adjusting the flow proportion of the bypass pipe (25) and the circulation interface.

9. The modular water heater of claim 1 or 2, wherein: the heat storage module is characterized by further comprising an electrifying protection mechanism, and the electrifying protection mechanism enables the heating module to be assembled on the heat storage module and then triggers the switch to work in an electrifying mode in a mechanical, electromagnetic and capacitive mode.

10. The modular water heater of claim 1 or 2, wherein: the heating module is fixed with one end of the heat storage module through a buckle, and the other end of the heating module is fixed through threads.

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