CN220379823U

CN220379823U - Hybrid thermal system

Info

Publication number: CN220379823U
Application number: CN202320857532.1U
Authority: CN
Inventors: 朱文珺; 赵张宁; 孙陈欢
Original assignee: Bosch Thermotechnology Shanghai Co Ltd
Current assignee: Bosch Thermotechnology Shanghai Co Ltd
Priority date: 2023-04-17
Filing date: 2023-04-17
Publication date: 2024-01-23
Anticipated expiration: 2033-04-17

Abstract

The present utility model relates to a hybrid thermal system. The hybrid heat system comprises a heat pump, a water heater, a heating terminal and a heat exchanger, wherein the heat exchanger is communicated with the heating terminal through a pipeline to form a heating terminal water loop, the heat exchanger is communicated with the water heater through a pipeline to form a first heating heat source end water loop, and the heat pump is communicated with the heat exchanger through a pipeline to form a second heating heat source end water loop. The hybrid heat system can integrate the first heating heat source end water loop and the second heating heat source end water loop together during heating, thereby forming a heat supply end, and exchanges heat with a heating terminal through a three-in three-out heat exchanger. Therefore, the water paths of the heat supply end and the user end can be completely isolated, the hydraulic balance of the heat source end and the heating terminal is not affected, water passing through the heat source equipment cannot directly enter the user end, the water paths are not easy to block, and the maintenance is very facilitated.

Description

Hybrid thermal system

Technical Field

The utility model relates to the technical field of refrigeration and heating, in particular to a hybrid heating system.

Background

For the comfort of heat in winter and summer, many families can install a wall-mounted boiler for heating in winter, air conditioner for refrigerating in summer, or directly purchase a heat pump for refrigerating and heating. Due to the limitations of the individual devices themselves and the lack of intelligent linkages between the devices, it is often difficult to achieve a balance of thermal comfort, thermal efficiency, and economy.

For example, when extremely cold weather occurs in winter, the heat efficiency of the single heat pump is greatly reduced in an extremely cold outdoor environment, or it is difficult to supply design heat to the user side during defrosting, resulting in reduced user comfort. Because of the lack of refrigeration capability of single heating furnace (or dual-purpose furnace) systems, in areas where there is both a thermal load and a cooling load, additional cooling systems are required, resulting in multiple sets of separate lines or multiple sets of controls in the user's home.

Disclosure of Invention

The present utility model aims to solve or alleviate to some extent the technical problems set out above.

According to the utility model, a hybrid heat system is provided, which comprises a heat pump, a water heater and a heating terminal, and further comprises a heat exchanger, wherein the heat exchanger is communicated with the heating terminal through a pipeline to form a heating terminal water loop, the heat exchanger is communicated with the water heater through a pipeline to form a first heating heat source end water loop, and the heat pump is communicated with the heat exchanger through a pipeline to form a second heating heat source end water loop.

Optionally, in the above hybrid thermal system, the hybrid thermal system further includes:

the refrigeration terminal is communicated with the heat pump through a pipeline to form a refrigeration water loop; and

a first flow direction regulating device which is arranged on the pipelines of the second heating heat source end water loop and the refrigerating water loop,

the mixed heat system can alternatively conduct the second heating heat source end water loop or the refrigerating water loop through the first flow direction regulating device.

Optionally, in the above hybrid heating system, the heating terminal includes a water separator and a heater, wherein the water separator includes a water separator main pipe for distributing water and a water separator water collector main pipe for collecting backwater.

Optionally, in the above hybrid heating system, the heating terminal further includes a water mixing flow path for providing heating return water and a second flow direction adjusting device for conducting the water mixing flow path, and the first flow direction adjusting device and the second flow direction adjusting device are three-way valves.

Optionally, in the above hybrid thermal system, the hybrid thermal system further includes a controller, wherein the heat pump, the water heater, the first flow direction adjustment device, and the second flow direction adjustment device are controlled by the controller.

Optionally, in the above hybrid heating system, the hybrid heating system further includes an outdoor temperature sensor that is in communication with the controller, and the controller instructs the first flow direction adjusting device to switch the second heating heat source side water circuit or the cooling water circuit according to an outdoor temperature change.

Optionally, in the above hybrid heating system, in a heating mode, the hybrid heating system includes a first preset temperature and a second preset temperature, wherein the first preset temperature is greater than the second preset temperature, and when the outdoor temperature is less than the second preset temperature, the controller controls the water heater to operate and controls the heat pump to stop working; when the outdoor temperature is between the second preset temperature and the first preset temperature, the first flow direction regulating device conducts the second heating heat source end water loop, and the controller controls the heat pump and the water heater to operate simultaneously; when the outdoor temperature is higher than the first preset temperature, the first flow direction regulating device conducts the second heating heat source end water loop, and the controller controls the heat pump to operate and controls the water heater to stop working;

in a refrigeration mode, the first flow direction regulating device conducts the refrigeration water loop, and the controller controls the heat pump to operate and controls the water heater to stop working.

Optionally, in the above hybrid heat system, the heat exchanger is a plate heat exchanger, and the water heater is a gas wall-mounted boiler.

Optionally, in the above hybrid heating system, the heating terminal includes a floor heating or radiator, and the cooling terminal is a fan coil.

Alternatively, in the above hybrid heating system, the heat pump is located outdoors, and the water heater and the heat exchanger are located indoors.

It can be appreciated that the hybrid heating system of the utility model can integrate the water path of the heat pump responsible for heating with the water heater to form a heating end and exchange heat with the user end through the three-in three-out heat exchanger during heating; during refrigeration, the water channel of the heat pump responsible for cooling can be directly subjected to heat exchange with the user side.

Drawings

The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present utility model. Moreover, like numerals in the figures are used to designate like parts, wherein:

fig. 1 schematically illustrates a structural schematic of an embodiment of a disclosed hybrid thermal system according to the present utility model.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. First, terms of directions such as up, down, left, right, front, rear, inner, outer, top, bottom, etc. mentioned or possible in the present specification are defined with respect to the configurations shown in the drawings, and they are relative concepts, so that they may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms.

Fig. 1 shows a schematic structural diagram of a hybrid thermal system according to the present disclosure. The hybrid heating system 100 is composed of a heat pump 110, a water heater 120, a heating terminal 130, a cooling terminal 140, a heat exchanger 150, and a first flow direction adjusting device 160, etc., wherein the heat pump 110 may be disposed outdoors, and the water heater 120 and the heat exchanger 150 may be disposed indoors together with the heating terminal 130 and the cooling terminal 140. Further, the heating terminal 130 includes, but is not limited to, a floor heating or radiator, and the cooling terminal 140 includes, but is not limited to, a fan coil. As is apparent from fig. 1, the heat exchanger 150 is in communication with the heating terminal 130 through a pipe to form a heating terminal water circuit S1, the heat exchanger 150 is in communication with the water heater 120 through a pipe to form a first heating heat source end water circuit S2, the heat pump 110 is in communication with the heat exchanger 150 through a pipe to form a second heating heat source end water circuit S3, and the heat pump 110 is in communication with the cooling terminal 140 through a pipe to form a cooling water circuit S4. The first flow direction adjusting device 160 is disposed on the pipes of the second heating heat source end water circuit S3 and the cooling water circuit S4, wherein the hybrid heating system 100 can selectively conduct the second heating heat source end water circuit S3 or the cooling water circuit S4 through the first flow direction adjusting device 160, thereby separating a cold and hot water circuit. Specifically, in the heating, the first flow direction adjusting device 160 may communicate the heat pump 110 as a heating apparatus with the second heating heat source-side water circuit S3; in the cooling, the first flow direction adjusting device 160 may communicate the heat pump 110 as a cooling device with the cooling water circuit S4. Of course, it is also possible to omit the refrigeration terminal, the first flow direction regulating device and the chilled water circuit for the sake of simplifying the system or other purposes.

As can be seen from the above, in the hybrid heating system according to the present utility model, the heat pump 110 and the water heater 120 may be responsible for heating alone or simultaneously, while cooling is only responsible for the heat pump 110. During heating, the first heating heat source end water loop S2 and the second heating heat source end water loop S3 are integrated together to form a heat supply end, and heat exchange is performed with a heating terminal through the heat exchanger 150 of 'three in and three out'. In this way, the water paths of the heating end and the user end can be completely isolated during heating, the hydraulic balance of the heating end and the heating end is not affected, water passing through the heat source equipment cannot directly enter the user end, the water paths are not easy to block, and the maintenance is very facilitated.

As will be readily understood by those skilled in the art, the heating terminal 130 may include a water dividing and collecting main 131 and a heater 132, wherein the water dividing and collecting main 131 includes a water dividing and collecting main 131a for dividing inflow water and a water dividing and collecting main 131b for collecting return water. Therefore, the hot water inlet of the heater 132 is collected to the sub-collector main pipe 131a, and the cold water outlet of the heater 132 is collected to the sub-collector main pipe 131b. It is also possible that the heating terminal 130 omits the water separator 131 for the purpose of saving cost. That is, the heat exchanger 150 may be directly connected to the terminal heat circuit, or may be connected to the water separator-collector first, and then connected to the terminal heat circuit through the water separator-collector. Further, the heating terminal 130 further includes a water mixing flow path 133 for providing the heat-radiated heating backwater, and a second flow direction adjusting device 134 for communicating the water mixing flow path 133. As shown in fig. 1, both the first and second flow direction regulating devices 160, 134 may be three-way valves.

Furthermore, the hybrid heating system 100 further comprises a controller (not shown), wherein the heat pump 110, the water heater 120, the first flow direction adjustment device 160 and the second flow direction adjustment device 134 are controlled by the controller. In addition, the hybrid heating system 100 further includes an outdoor temperature sensor 170, the outdoor temperature sensor 170 being in communication with the controller, and the controller commanding the first flow direction adjustment device 160 to switch the second heating heat source side water circuit S3 or the cooling water circuit S4 according to an outdoor temperature change.

In the above embodiment, in the heating mode, the hybrid heating system 100 includes a first preset temperature and a second preset temperature, wherein the first preset temperature is greater than the second preset temperature. When the outdoor temperature is less than the second preset temperature, the controller controls the water heater 120 to operate and controls the heat pump 110 to stop operating. When the outdoor temperature is between the second preset temperature and the first preset temperature, the first flow direction adjusting device 160 turns on the second heating heat source-side water circuit S3, and the controller controls the heat pump 110 and the water heater 120 to simultaneously operate, and the heat pump 110 bears a base heat load, and the water heater 120 bears the rest of peak heat loads. When the outdoor temperature is greater than the first preset temperature, the first flow direction adjusting device 160 turns on the second heating heat source-side water circuit S3, and the controller controls the heat pump 110 to operate and controls the water heater 120 to stop operating. In the cooling mode, the first flow direction adjusting device 160 turns on the cooling water circuit S4, and the controller controls the heat pump 110 to operate and controls the water heater 120 to stop operating.

For example, when the outdoor temperature is-5 ℃ and below, only the water heater 120 is used for heating due to the energy efficiency of the heat pump 110 being too low, and the entire heat load is loaded. When the outdoor temperature is 5 ℃ and above, only the heat pump 110 is used for heating, and the entire heat load is borne. When the outdoor temperature is between-5 ℃ and 5 ℃, the base heat load is borne by the heat pump 110, and the rest of the heat load is borne by the water heater 120. In addition, according to the heat pump economy principle, the heating target temperature of the heat pump can be limited, if the system set temperature of a user is higher than the temperature limit, the water heater is started, and the target temperature of the water heater is set according to the system requirement. If the target temperature of the system is lower than the heating temperature limited by the heat pump, the heat pump is started first, and the water heater is started after the heat pump runs at full load so as to reach the required set temperature. The system set temperature control is controlled by setting corresponding parameters by a PID controller.

In addition to controlling the operation of the heat pump and the water heater of the hybrid heating system according to the outdoor temperature, it is conceivable for a person skilled in the art to control the operation of the heat pump and the water heater of the hybrid heating system according to other parameters, such as the outlet water temperature of the heating terminal set by a user. Specifically, the hybrid thermal system 100 includes a first outlet water temperature predetermined value and a second outlet water temperature predetermined value, wherein the first outlet water temperature predetermined value is greater than the second outlet water temperature predetermined value. When the water outlet temperature set by the user is above the first water outlet temperature preset value, the controller controls the water heater 120 to operate and controls the heat pump 110 to stop operating. The controller controls the heat pump 110 or the water heater 120 to operate when the water outlet temperature set by the user is between the first water outlet temperature predetermined value and the second water outlet temperature predetermined value. For example, if the current state is that heat is supplied by the heat pump 110, the heat pump 110 is maintained to supply heat; if the current state is heating by the water heater 120, the water heater 120 is maintained to supply heat. When the outlet water temperature set by the user is below the second outlet water temperature predetermined value, the controller controls the heat pump 110 to operate and controls the water heater 120 to stop operating.

For another example, the heat pump 110 can be operated at a water outlet temperature that is always maintained not higher than a certain maximum temperature, and the water outlet temperature can be adjusted according to different loads. When the water outlet temperature set by the user is higher than the highest temperature, the controller controls the heat pump 110 to still maintain the highest temperature for heat supply, and controls the water heater 120 to perform secondary heating on the water outlet of the heat pump 110, so that the final water outlet temperature of the heating terminal 130 can reach the target water outlet temperature set by the user.

Alternatively, the heat exchanger 150 may take the form of a plate heat exchanger. The plate heat exchanger is an efficient heat exchanger formed by stacking a series of metal sheets with certain corrugated shapes. Thin rectangular channels are formed between the various plates through which heat is exchanged. The plate heat exchanger is ideal equipment for carrying out heat exchange between liquid and between liquid and vapor, and has the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, wide application, long service life and the like. Under the same pressure loss, the heat transfer coefficient is 3-5 times higher than that of the tubular heat exchanger, the occupied area is one third of that of the tubular heat exchanger, and the heat recovery rate can be up to more than 90%. In addition, the water heater 120 may include a gas wall-mounted boiler, or take the form of other heat sources capable of supplying heating hot water.

In summary, the hybrid heating system of the present utility model employs multiple cold and hot devices to form a hybrid heating/cooling system with multiple heat sources, and is matched with an automatic control system to make each device operate in an optimal state, so as to pursue an optimal balance of thermal comfort, thermal efficiency and economy.

The above description sets forth several embodiments of the hybrid thermal system of the present utility model in detail, which are provided solely for the purpose of illustrating the principles of the present utility model and its embodiments, and not limitation thereof, and various modifications and adaptations may be made by one of ordinary skill in the art without departing from the spirit and scope of the utility model. Accordingly, all equivalent arrangements should be considered to be within the scope of the present utility model and as defined in the claims.

Claims

1. The utility model provides a hybrid heating system, its includes heat pump (110), water heater (120) and heating terminal (130), its characterized in that, hybrid heating system (100) still include heat exchanger (150), heat exchanger (150) pass through the pipeline with heating terminal (130) communicate in order to form heating terminal water circuit (S1), heat exchanger (150) pass through the pipeline with water heater (120) communicate in order to form first heating heat source end water circuit (S2), heat pump (110) pass through the pipeline with heat exchanger (150) communicate in order to form second heating heat source end water circuit (S3).

2. The hybrid thermal system according to claim 1, wherein the hybrid thermal system (100) further comprises:

-a refrigeration terminal (140), the refrigeration terminal (140) being in communication with the heat pump (110) through a pipe to form a chilled water circuit (S4); and

a first flow direction adjusting device (160), wherein the first flow direction adjusting device (160) is arranged on the pipelines of the second heating heat source end water loop (S3) and the refrigerating water loop (S4),

wherein the hybrid heating system (100) can selectively conduct the second heating heat source end water loop (S3) or the refrigerating water loop (S4) through the first flow direction regulating device (160).

3. The hybrid heating system according to claim 2, wherein the heating terminal (130) comprises a water separator-collector (131) and a heater (132), wherein the water separator-collector (131) comprises a water separator-collector main pipe (131 a) for distributing water intake and a water separator-collector main pipe (131 b) for collecting water return.

4. A hybrid heating system according to claim 3, wherein the heating terminal (130) further comprises a water mixing flow path (133) for providing heating return water and a second flow direction regulating device (134) for communicating the water mixing flow path (133), and the first flow direction regulating device (160) and the second flow direction regulating device (134) are three-way valves.

5. The hybrid heating system of claim 4, wherein the hybrid heating system (100) further comprises a controller, wherein the heat pump (110), the water heater (120), the first flow direction adjustment device (160), and the second flow direction adjustment device (134) are controlled by the controller.

6. The hybrid heating system of claim 5, wherein the hybrid heating system (100) further comprises an outdoor temperature sensor (170), the outdoor temperature sensor (170) being in communication with the controller, and the controller commanding the first flow direction adjustment device (160) to switch the second heating heat source side water circuit (S3) or the cooling water circuit (S4) according to an outdoor temperature change.

7. The hybrid heating system of claim 6, wherein in heating mode, the hybrid heating system (100) includes a first preset temperature and a second preset temperature, wherein the first preset temperature is greater than the second preset temperature, wherein when the outdoor temperature is less than the second preset temperature, the controller controls the water heater (120) to operate and controls the heat pump (110) to stop operating; when the outdoor temperature is between the second preset temperature and the first preset temperature, the first flow direction regulating device (160) turns on the second heating heat source end water circuit (S3), and the controller controls the heat pump (110) and the water heater (120) to operate simultaneously; when the outdoor temperature is higher than the first preset temperature, the first flow direction regulating device (160) conducts the second heating heat source end water loop (S3), and the controller controls the heat pump (110) to operate and controls the water heater (120) to stop working;

in a cooling mode, the first flow direction regulating device (160) conducts the cooling water circuit (S4), and the controller controls the heat pump (110) to operate and controls the water heater (120) to stop operating.

8. The hybrid heating system of any one of claims 1-4, wherein the heat exchanger (150) is a plate heat exchanger and the water heater (120) is a gas fired wall-mounted boiler.

9. The hybrid heating system of any of claims 2-4, wherein the heating terminal (130) comprises a floor heating or radiator and the cooling terminal (140) comprises a fan coil.

10. The hybrid heating system according to any one of claims 1-4, wherein the heat pump (110) is located outdoors and the water heater (120) and the heat exchanger (150) are located indoors.