CN216115541U

CN216115541U - Double-pipe heat exchanger

Info

Publication number: CN216115541U
Application number: CN202122576241.9U
Authority: CN
Inventors: 黄永华; 李皇
Original assignee: Suzhou Dingdong Technology Co ltd
Current assignee: Suzhou Dingdong Technology Co ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-03-22
Anticipated expiration: 2031-10-26

Abstract

The utility model discloses a double-pipe heat exchanger, and relates to the technical field of drinking water equipment. The double-pipe heat exchanger comprises an outer pipe, an inner pipe, a first water tank, a first water pump, a water inlet pipe and a water outlet pipe. The outer pipe is sleeved outside the inner pipe, the inner pipe is used for allowing a second fluid to flow through, the outer pipe and the inner pipe enclose into an annular cavity together, one end of the first water tank is connected with the annular cavity through the water inlet pipe, the other end of the first water tank is connected with the annular cavity through the water outlet pipe, the first water tank is used for storing the first fluid, and the first water pump is installed on the water inlet pipe. Compared with the prior art, the double-pipe heat exchanger provided by the utility model adopts the inner pipe and the outer pipe which jointly enclose the annular cavity and the first water pump arranged on the water inlet pipe, so that the heat exchange or heat preservation functions can be flexibly switched, the output temperature of fluid is ensured to meet the user demand, the heat exchange rate is convenient to adjust, and the user experience is improved.

Description

Double-pipe heat exchanger

Technical Field

The utility model relates to the technical field of drinking water equipment, in particular to a double-pipe heat exchanger.

Background

At present, the double-pipe heat exchanger is widely applied to production and life due to the advantages of low cost and good heat exchange effect. In a double pipe heat exchanger, the heat of the hot fluid is transferred to the cold fluid through the inner pipe wall to lower the temperature of the hot fluid. However, the existing double-pipe heat exchanger cannot flexibly switch heat exchange or heat preservation functions according to the requirements of users, so that the heat exchange rate between hot fluid and cold fluid is consistent all the time, the temperature of the output hot fluid or cold fluid is not adjustable, and the user experience is influenced.

In view of this, it is very important to design and manufacture a double pipe heat exchanger capable of flexibly switching heat exchange or heat preservation functions, especially in the production of drinking water equipment.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a double-pipe heat exchanger which can flexibly switch heat exchange or heat preservation functions to ensure that the output temperature of fluid meets the requirements of users, is convenient to adjust the heat exchange rate and improves the user experience.

The utility model is realized by adopting the following technical scheme.

The utility model provides a double-pipe heat exchanger, including the outer tube, the inner tube, first water tank, first water pump, inlet tube and outlet pipe, the outer pipe box is located outside the inner tube, the inner tube is used for supplying the second fluid to flow through, the outer tube encloses into the toroidal cavity with the inner tube jointly, the inlet tube is passed through to the one end of first water tank and is connected with the toroidal cavity, the other end passes through the outlet pipe and is connected with the toroidal cavity, first water tank is used for storing first fluid, first water pump is installed on the inlet tube, first water pump can be when corotation with the first fluid suction toroidal cavity in the first water tank, in order to utilize the first fluid to carry out the heat transfer to the second fluid in the inner tube, first water pump can also when the reversal take out first water tank with the first fluid in the toroidal cavity, in order to utilize the air to keep warm to the second fluid in the inner tube.

Optionally, the water inlet pipe is connected to the bottom of the first water tank, the water outlet pipe is connected to the top of the first water tank, and the top of the first water tank is provided with air holes.

Optionally, the double-pipe heat exchanger further comprises a refrigeration assembly, the refrigeration assembly is mounted on the first water tank, and the refrigeration assembly is used for refrigerating the first fluid in the first water tank so as to keep the temperature of the first fluid unchanged.

Optionally, the refrigeration assembly comprises a heat exchange piece, a first fin and a second fin, the heat exchange piece is installed on the side wall of the first water tank, the first fin and the second fin are arranged on two sides of the heat exchange piece relatively, the first fin extends into the first water tank, and the second fin extends out to the outside.

Optionally, the heat exchange member is a semiconductor cooling plate.

Optionally, heat-conducting silica gel is coated between the first fin and the heat exchange piece, and heat-conducting silica gel is coated between the second fin and the heat exchange piece.

Optionally, the double-pipe heat exchanger further comprises a second water tank, a heating element and a second water pump, the heating element is installed in the second water tank, the second water tank is used for storing a second fluid, the heating element is used for heating the second fluid, the second water tank is connected with the inner pipe through the second water pump, and the second water pump is used for pumping the second fluid into the inner pipe.

Optionally, the heating element is an electrically heated tube.

Optionally, the double-pipe heat exchanger further includes a temperature sensor, the inner pipe is provided with an outlet, the temperature sensor is installed in the outlet, and the temperature sensor is used for detecting the output temperature of the second fluid.

Optionally, the double-pipe heat exchanger further comprises a controller, the controller is connected with the temperature sensor and the first water pump at the same time, and the controller is used for controlling the pumping flow of the first water pump according to the output temperature.

The double-pipe heat exchanger provided by the utility model has the following beneficial effects:

the casing pipe heat exchanger provided by the utility model has the advantages that the outer pipe is sleeved outside the inner pipe, the inner pipe is used for allowing a second fluid to flow through, the outer pipe and the inner pipe jointly enclose an annular cavity, one end of the first water tank is connected with the annular cavity through the water inlet pipe, the other end of the first water tank is connected with the annular cavity through the water outlet pipe, the first water tank is used for storing a first fluid, the first water pump is arranged on the water inlet pipe, the first water pump can pump the first fluid in the first water tank into the annular cavity in the forward rotation process so as to exchange heat for the second fluid in the inner pipe through the first fluid, and the first water pump can also pump the first fluid in the annular cavity back into the first water tank in the reverse rotation process so as to preserve heat for the second fluid in the inner pipe through air. Compared with the prior art, the double-pipe heat exchanger provided by the utility model adopts the inner pipe and the outer pipe which jointly enclose the annular cavity and the first water pump arranged on the water inlet pipe, so that the heat exchange or heat preservation functions can be flexibly switched, the output temperature of fluid is ensured to meet the user demand, the heat exchange rate is convenient to adjust, and the user experience is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a double-pipe heat exchanger according to an embodiment of the present invention;

fig. 2 is a block diagram of a structure in which a controller is connected to a temperature sensor and a first water pump in a double pipe heat exchanger according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a tube sleeve disposed outside an inner tube in a double tube heat exchanger according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a refrigeration assembly in a double-tube heat exchanger according to an embodiment of the present invention.

Icon: 100-double pipe heat exchanger; 110-an outer tube; 120-an inner tube; 130-a first water tank; 140-a first water pump; 160-water inlet pipe; 170-water outlet pipe; 180-a refrigeration component; 181-heat exchange member; 182-a first fin; 183-second fin; 190-a second water tank; 200-a heating element; 210-a second water pump; 220-a temperature sensor; 230-a controller; 240-annular cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

Referring to fig. 1, 2 and 3, a double pipe heat exchanger 100 for exchanging heat with a fluid is provided in an embodiment of the present invention. It can switch heat transfer or heat preservation function in a flexible way to guarantee that fluidic output temperature satisfies the user demand, and be convenient for adjust heat transfer rate, promote user experience.

In this embodiment, double pipe heat exchanger 100 is applied to among the drinking water equipment, and double pipe heat exchanger 100 is used for carrying out the heat transfer to water, and wherein, first fluid is cold water, and the second fluid is hot water, and double pipe heat exchanger 100 can utilize cold water to carry out the heat transfer to hot water to make hydrothermal temperature reduce, at this in-process, heat transfer rate can be adjusted in a flexible way, satisfies user's demand with guaranteeing hydrothermal output temperature. But not limited thereto, in other embodiments, the double pipe heat exchanger 100 may be used for exchanging heat with oil or other fluids, and the types of the first fluid and the second fluid are not particularly limited.

The double pipe heat exchanger 100 includes an outer pipe 110, an inner pipe 120, a first water tank 130, a first water pump 140, a water inlet pipe 160, a water outlet pipe 170, a refrigerating assembly 180, a second water tank 190, a heating element 200, a second water pump 210, a temperature sensor 220, and a controller 230. The outer tube 110 is sleeved outside the inner tube 120, the inner tube 120 is used for allowing a second fluid to flow through, the outer tube 110 and the inner tube 120 jointly enclose an annular cavity 240, the annular cavity 240 is used for allowing a first fluid to flow through, and the first fluid and the second fluid can exchange heat through the wall of the inner tube 120 to reduce the temperature of the second fluid. One end of the first water tank 130 is connected to the annular cavity 240 through the water inlet pipe 160, and the other end is connected to the annular cavity 240 through the water outlet pipe 170. First water tank 130 is used for storing first fluid, and first water pump 140 installs on inlet tube 160, and first water pump 140's the flow of drawing water is adjustable to in adjust heat transfer rate, promote user experience.

Specifically, the first water pump 140 can pump the first fluid in the first water tank 130 into the annular cavity 240 during the forward rotation to exchange heat with the second fluid in the inner tube 120 by the first fluid; the first water pump 140 is also capable of pumping the first fluid in the annular cavity 240 back to the first water tank 130 when reversed to keep the second fluid in the inner tube 120 warm with air. In this way, the double pipe heat exchanger 100 can flexibly switch heat exchange or heat preservation functions to ensure that the output temperature of the second fluid meets the user's requirements.

In this embodiment, the water inlet pipe 160 is connected to the bottom of the first water tank 130, the water outlet pipe 170 is connected to the top of the first water tank 130, and the first fluid in the first water tank 130 is not filled. The first water pump 140 can pump the first fluid in the first water tank 130 into the annular cavity 240 through the water inlet pipe 160 during forward rotation, and then flow back into the first water tank 130 through the water outlet pipe 170, so as to realize a continuous heat exchange function; the first water pump 140 can also draw the first fluid in the annular cavity 240 back to the first water tank 130 through the water inlet pipe 160 when the water tank rotates reversely, at this time, because the water outlet pipe 170 is not in contact with the first fluid in the first water tank 130, the first fluid cannot be sucked into the annular cavity 240 through the water outlet pipe 170, and only air is left in the annular cavity 240, so that the heat preservation function is realized.

Specifically, an air hole (not shown) is formed in the top of the first water tank 130, and the air hole can allow external air to enter, so that the air pressure in the first water tank 130 is the same as the external atmospheric pressure, thereby ensuring that the first water pump 140 can stably operate.

It should be noted that the first water pump 140 is installed on the water inlet pipe 160, and the first water pump 140 is used for pumping the first fluid in the first water tank 130 into the annular cavity 240 during the forward rotation, so as to exchange heat with the second fluid in the inner pipe 120, so that the temperature of the second fluid is reduced. In this process, the power of the first water pump 140 is adjustable, that is, the pumping flow of the first water pump 140 is adjustable, and the flow of the first fluid in the annular cavity 240 can be adjusted without depending on a valve, so as to adjust the heat exchange rate between the first fluid and the second fluid, thereby adjusting the output temperature of the second fluid and ensuring that the output temperature of the second fluid meets the user requirement.

When the power of the first water pump 140 is adjusted, the flow rate of the first fluid in the annular cavity 240 decreases, and thus, the volume of the first fluid exchanging heat with the unit volume of the second fluid decreases, the heat exchange rate between the first fluid and the second fluid decreases, and the output temperature of the second fluid increases; when the power of the first water pump 140 is increased, the flow rate of the first fluid in the annular cavity 240 increases, and thus the volume of the first fluid exchanging heat with the unit volume of the second fluid increases, the heat exchange rate between the first fluid and the second fluid increases, and the output temperature of the second fluid decreases.

Further, refrigeration subassembly 180 is installed on first water tank 130, and refrigeration subassembly 180 is used for refrigerating the first fluid in first water tank 130 to keep the temperature of first fluid unchangeable, thereby guarantee that first fluid can be stably to the second fluid heat transfer. Specifically, since the first fluid absorbs heat of the second fluid in the process of exchanging heat with the second fluid, the temperature of the first fluid rises to a certain extent, and at this time, the first fluid is refrigerated by the refrigeration assembly 180, so that the original temperature of the first fluid is kept unchanged, and the temperature rise is avoided.

It should be noted that the heating element 200 is installed in the second water tank 190, the second water tank 190 is used for storing the second fluid, the heating element 200 is used for heating the second fluid, the second water tank 190 is connected to the inner pipe 120 through the second water pump 210, and the second water pump 210 is used for pumping the second fluid into the inner pipe 120, so that the second fluid exchanges heat with the first fluid in the annular cavity 240 in the inner pipe 120. In this embodiment, the heating member 200 is an electric heating tube.

In this embodiment, the inner tube 120 is provided with an outlet (not shown), the temperature sensor 220 is installed in the outlet, and the temperature sensor 220 is used for detecting the output temperature of the second fluid. The controller 230 is connected with the temperature sensor 220 and the first water pump 140 simultaneously, and the controller 230 is used for controlling the pumping flow of the first water pump 140 according to the output temperature of the second fluid to adjust the heat exchange rate between the first fluid and the second fluid, so as to adjust the output temperature of the second fluid, further realize the automatic control of the output temperature of the second fluid, and improve the user experience.

Referring to fig. 4, the cooling assembly 180 includes a heat exchanging member 181, a first fin 182, and a second fin 183. The heat exchange member 181 is mounted on a side wall of the first water tank 130, and the first fin 182 and the second fin 183 are oppositely disposed on both sides of the heat exchange member 181. The first fin 182 extends into the first tank 130 and contacts the first fluid, and the first fin 182 is used for cooling the first fluid. The second fins 183 are extended to the outside, and the second fins 183 are used for heat dissipation.

In this embodiment, the heat exchanging member 181 is a semiconductor cooling fin. The semiconductor cooling plate is provided with a hot end (not shown) and a cold end (not shown) opposite to each other, the cold end is connected with the first fin 182, and the hot end is connected with the second fin 183. The cold energy generated by the semiconductor refrigeration sheet is transferred to the first fin 182 through the cold end and is transferred to the first fluid under the action of the first fin 182; the heat generated by the semiconductor chilling plate is transferred to the second fins 183 through the hot end and is dissipated to the outside under the action of the second fins 183.

Specifically, heat-conducting silica gel (not shown) is coated between the first fins 182 and the heat exchange member 181, and heat-conducting silica gel is coated between the second fins 183 and the heat exchange member 181, and is used for improving the heat exchange performance and reducing the heat loss.

In the double-pipe heat exchanger 100 provided by the embodiment of the present invention, the outer pipe 110 is sleeved outside the inner pipe 120, the inner pipe 120 is used for allowing a second fluid to flow through, the outer pipe 110 and the inner pipe 120 together enclose an annular cavity 240, one end of the first water tank 130 is connected with the annular cavity 240 through the water inlet pipe 160, the other end of the first water tank 130 is connected with the annular cavity 240 through the water outlet pipe 170, the first water tank 130 is used for storing the first fluid, the first water pump 140 is installed on the water inlet pipe 160, the first water pump 140 can pump the first fluid in the first water tank 130 into the annular cavity 240 during forward rotation, so as to exchange heat with the second fluid in the inner pipe 120 by using the first fluid, and the first water pump 140 can also pump the first fluid in the annular cavity 240 back into the first water tank 130 during reverse rotation, so as to preserve heat of the second fluid in the inner pipe 120 by using air. Compared with the prior art, the double-pipe heat exchanger 100 provided by the utility model adopts the inner pipe 120 and the outer pipe 110 which jointly enclose the annular cavity 240 and the first water pump 140 arranged on the water inlet pipe 160, so that the heat exchange or heat preservation functions can be flexibly switched to ensure that the output temperature of the fluid meets the requirements of users, the heat exchange rate can be adjusted without depending on a valve, the production cost is saved, and the user experience is improved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-pipe heat exchanger is characterized by comprising an outer pipe, an inner pipe, a first water tank, a first water pump, a water inlet pipe and a water outlet pipe, the outer pipe is sleeved outside the inner pipe, the inner pipe is used for a second fluid to flow through, the outer pipe and the inner pipe jointly enclose an annular cavity, one end of the first water tank is connected with the annular cavity through the water inlet pipe, the other end of the first water tank is connected with the annular cavity through the water outlet pipe, the first water tank is used for storing a first fluid, the first water pump is arranged on the water inlet pipe, the first water pump can pump the first fluid in the first water tank into the annular cavity when the first water pump rotates forwards, the first water pump can also pump the first fluid in the annular cavity back to the first water tank when the first water pump rotates reversely, so that the second fluid in the inner pipe is insulated by air.

2. The double-pipe heat exchanger according to claim 1, wherein the water inlet pipe is connected to the bottom of the first water tank, the water outlet pipe is connected to the top of the first water tank, and the top of the first water tank is provided with air holes.

3. The double-pipe heat exchanger according to claim 1, further comprising a refrigeration assembly mounted to the first tank for refrigerating the first fluid in the first tank to maintain the temperature of the first fluid constant.

4. The double-pipe heat exchanger according to claim 3, wherein the refrigerating assembly comprises a heat exchange member, a first fin and a second fin, the heat exchange member is mounted on a side wall of the first water tank, the first fin and the second fin are oppositely arranged on two sides of the heat exchange member, the first fin extends into the first water tank, and the second fin extends to the outside.

5. The double-tube heat exchanger according to claim 4, wherein the heat exchanging member is a semiconductor cooling fin.

6. The double-pipe heat exchanger according to claim 4, wherein a heat conductive silica gel is coated between the first fin and the heat exchange member, and a heat conductive silica gel is coated between the second fin and the heat exchange member.

7. The double pipe heat exchanger according to claim 1, further comprising a second water tank, a heating element and a second water pump, wherein the heating element is mounted in the second water tank, the second water tank is used for storing a second fluid, the heating element is used for heating the second fluid, the second water tank is connected with the inner pipe through the second water pump, and the second water pump is used for pumping the second fluid into the inner pipe.

8. The double-pipe heat exchanger according to claim 7, wherein the heating element is an electric heating pipe.

9. The double-pipe heat exchanger according to claim 1, further comprising a temperature sensor, wherein the inner pipe is provided with an outlet, the temperature sensor being mounted in the outlet, the temperature sensor being configured to detect an output temperature of the second fluid.

10. The double-pipe heat exchanger according to claim 9, further comprising a controller, wherein the controller is connected with the temperature sensor and the first water pump at the same time, and the controller is used for controlling the pumping flow of the first water pump according to the output temperature.