Civil hot water system based on air source heat pump unit

Abstract

The utility model discloses a civil hot water system based on an air source heat pump unit. The civil hot water system comprises the air source heat pump unit, a hot water tank and a reheating circulation unit. The hot water tank is of a horizontal structure, a partition plate in the hot water tank divides the hot water tank into a heating section and a heat storage section, and the top of the partition plate and the top wall of the hot water tank are vertically arranged at intervals. The heating section is connected with a cold water supply pipeline; the cold water supply pipeline comprises a first pipeline and a second pipeline; the air source heat pump unit and the heating section form a circulating heating loop through a third pipeline, a fourth pipeline and the heating section; the reheating circulation unit comprises a reheating circulation main pipe and a plurality of first pipe joints which are arranged at the bottom of the heat storage section side by side at intervals, the reheating circulation main pipe communicates with the first pipeline, and a second valve is arranged on the reheating circulation main pipe close to the first pipeline; each first pipe joint is communicated with the reheating circulation main pipe, a temperature monitoring piece is arranged at a water inlet of each first pipe joint, and a third valve is arranged on each first pipe joint. The hot water tank is of a horizontal structure, the hot water tank does not need to be elevated, the total installation height is reduced, and then the load bearing per unit area of a roof is reduced; the air source heat pump unit is used for heating water in the heating section to 60 DEG C or above, hot water overflows to the heat storage section through the top of the partition plate, and heat storage is achieved; and each first pipe joint corresponds to a certain area.

Description

Technical Field

[0001] The utility model relates to the field of civil hot water supply, in particular to a civil hot water system based on an air source heat pump unit. Background Art

[0002] Hotels, hotels, hospital wards and other places all require centralized domestic hot water. In order to meet the large demand for heat, many places use heat pumps for centralized heating, such as air source heat pump heating, water source heat pump heating, etc. Among them, air source heat pump heating mostly adopts the solution of roof air source heat pump with open hot water tank, and the water in the open hot water tank is heated by the air source heat pump. However, this centralized heating solution often requires the configuration of a cold water tank of the same height, and the cold water tank is used to replenish water in the hot water tank, but this method is prone to cause large fluctuations in the outlet temperature of the hot water tank, and there is a phenomenon of hot and cold; in addition, in order to ensure the water supply pressure of high-rise floors, the cold water tank and the hot water tank need to be raised about 10m from the roof. The hot water tank and the cold water tank are often vertical, which makes the total height of the water tank very high, posing a safety hazard, and greatly increases the load per unit area of ​​the roof, which has a greater impact on the roof structure; furthermore, the sanitation of the open hot water tank is poor. Summary of the invention

[0003] In view of this, the utility model proposes a civil hot water system based on an air source heat pump unit.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a civil hot water system based on an air source heat pump unit, comprising an air source heat pump unit, a hot water tank and a reheat circulation unit; the hot water tank is a horizontal structure, and a partition in the hot water tank divides it into a heating section and a heat storage section, and the top of the partition and the top wall of the hot water tank are arranged at intervals from top to bottom; the heating section is connected to a cold water supply pipeline, and the cold water supply pipeline has a first pipeline and a second pipeline that are interconnected, a first pump is arranged on the first pipeline, and a first valve is arranged on the second pipeline; the air source heat pump unit forms a circulating heating loop through a third pipeline, a fourth pipeline and the heating section, and a second pump is arranged on the third pipeline or the fourth pipeline;

[0006] The reheat circulation unit includes a reheat circulation main pipe and a plurality of first pipe joints arranged side by side at intervals at the bottom of the heat storage section, the reheat circulation main pipe is connected with the first pipeline, and a second valve is arranged on the reheat circulation main pipe close to the first pipeline; each of the first pipe joints is connected with the reheat circulation main pipe, a temperature monitoring component is arranged at the water inlet of each first pipe joint and a third valve is arranged on the first pipe joint, a signal output end of the temperature monitoring component is connected with a signal input end of a controller, and control input ends of the first pump, the second pump, the first valve, the second valve and the third valve are all connected with a control output end of the controller.

[0007] The beneficial effects are: the pressurized hot water tank of the utility model is a horizontal structure and can withstand a certain pressure. There is no need to raise the hot water tank, which greatly reduces the total height of the hot water tank, improves safety, and greatly reduces the load-bearing per unit area of ​​the roof; the utility model utilizes an air source heat pump unit to heat the water in the heating section to above 60°C, and the hot water overflows to the heat storage section through the top of the partition to achieve heat storage; each first pipe joint corresponds to a certain area, and when the water temperature in the area is lower than the set temperature, it can enter the electric heating section through the reheat circulation main pipe, and circulate in this way, so that the water temperature in the lower part of the heat storage section gradually increases, thereby maximally ensuring the temperature of the lower area of ​​the heat storage section, and solving the problem of hot and cold heating in the existing air source heat pump heating.

[0008] Preferably, the reheat cycle main pipe is a blind pipe with one end closed, and has a plurality of second pipe joints corresponding one by one to the first pipe joints, and the second pipe joints are flange-connected to the first pipe joints.

[0009] Preferably, the hot water tank has a liquid level sensor, and the liquid level signal output end of the liquid level sensor is connected to the liquid level signal input end of the controller. When the liquid level of the heat storage section reaches the set liquid level, the second pump and the first pump are turned off to stop the water supply; when the water level of the heat storage section reaches the lowest set liquid level, the first pump and the second pump are turned on to replenish water and perform circulation heating to meet the heat demand.

[0010] Preferably, the reheat circulation units are two or more and are spaced apart along the length direction of the hot water tank. Two or more reheat circulation units are spaced apart along the length direction of the hot water tank to effectively ensure the water temperature in the lower area of ​​the hot water tank and avoid the water temperature being too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the utility model.

[0012] Figure 2 It is a circuit principle block diagram of the utility model. DETAILED DESCRIPTION

[0013] The following is a detailed description of an embodiment of the utility model in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the utility model, and a detailed implementation method and a specific operation process are given, but the protection scope of the utility model is not limited to the following embodiment.

[0014] It should be noted that, in the description of the present utility model, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0015] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0016] like Figure 1-2As shown, the civil hot water system based on the air source heat pump unit 3 of the utility model comprises a hot water tank 2 with a hot water inlet and a hot water outlet 1, an air source heat pump unit 3 and a reheat circulation unit. The hot water tank 2 is a horizontal structure. The partition 4 in the hot water tank 2 separates it into a heating section 2.1 and a heat storage section 2.2 (the hot water outlet is located in the heat storage section). The top of the partition 4 and the top wall of the hot water tank 2 are arranged in an upper and lower interval, so that the hot water in the heating section 2.1 overflows to the heat storage section 2.2 to meet the user's heating needs; the heating section 2.1 and the cold water The water supply pipeline is connected, and the cold water supply pipeline has a first pipeline and a second pipeline that are interconnected. The first pipeline is located on the bottom wall of the heating section and is provided with a first pump P1. The second pipeline has a first valve F1. The first pump P1 is used to pump cold water to the heating section 2.1; the air source heat pump unit 3 forms a circulating heating loop through the third pipeline L3, the fourth pipeline L4 and the heating section 2.1. The third pipeline L3 is provided with a second pump P2. The second pump P2 provides circulating power. The water in the heating section 2.1 is heated by the air source heat pump unit 3. Such a cycle can heat the water in the heating section 2.1 to a set temperature. When the hot water in the heating section 2.1 exceeds the partition 4, it overflows to the heat storage section 2.2. The reheat circulation unit includes a reheat circulation main pipe 6 and a plurality of first pipe joints 5 arranged side by side at intervals at the bottom of the heat storage section 2.2. One end of the reheat circulation main pipe 6 is closed and the other end thereof is connected to the first pipeline (of course, one of the first pipe joints 5 can also be directly installed at one end of the reheat circulation main pipe), and a second valve F2 is arranged on the reheat circulation main pipe 6 close to the first pipeline, and the water entering the heating section 2.1 can be adjusted by controlling the opening and closing states of the first valve F1 and the second valve F2; each first pipe joint 5 is connected to the reheat circulation main pipe 6, and a temperature monitoring component (preferably a temperature sensor T) is arranged at the water inlet of each first pipe joint 5, and a third valve F3 is arranged on the first pipe joint 5, and the signal output end of the temperature sensor T is connected to the signal input end of the controller, and the control input ends of the first pump P1, the second pump P2, the first valve F1, the second valve F2 and the third valve F3 are all connected to the control output end of the controller.

[0017] The utility model uses a cold water supply pipeline to supply water to the heating section 2.1, and uses a circulating heating loop between the air source heat pump unit 3 and the heating section 2.1 to circulate and heat the cold water entering the heating section 2.1 to 60°C; when the water level in the heating section 2.1 rises to the top of the partition 4, it overflows downward to the heat storage section 2.2 to achieve heat storage to meet the heat demand of the user. In addition, each first pipe joint 5 of the utility model corresponds to a certain area, thereby realizing the partition of the heat storage section 2.2; the temperature sensor T at the inlet of each first pipe joint 5, its corresponding third valve F3, second valve F2 and first pump P1 are controlled in linkage. When the water temperature at the corresponding point of the first pipe joint 5 is lower than the set value (generally 60°C), the controller controls the first valve F1 to close and the second valve F2 to open, and the third valve F3 of the corresponding area is also opened accordingly, and the first pump P1 is started, so that the water in the area is then pumped into the first pump P1. Under the action, the water enters the heating section 2.1 through the reheating circulation main pipe 6, and the circulating heating circuit between the air source unit and the heating section 2.1 continuously heats the water; and the water in the lower part of the heat storage section 2.2 enters the heating section 2.1, and the top of the heating section 2.1 overflows to the heat storage section 2.2, and the cycle is repeated, so that the water temperature in the lower part of the heat storage section 2.2 is increased to above 60°C, realizing the zoned heating of the bottom area of ​​the heat storage section 2.2, maximally ensuring the water temperature in the lower part of the heat storage section 2.2, and solving the problem of hot and cold in the existing air source heat pump heating. Of course, in actual installation, in order to avoid frequent start-up of the air source heat pump unit, an electric auxiliary heating coil can be installed in the heating section 2.1. When the water temperature in the lower area of ​​the heat storage section 2.2 is lower than 60°C, the water in this area enters the heating section 2.1 from the bottom of the heating section 2.1, is heated by the heating coil, and then overflows to the heat storage section 2.2, and the cycle is repeated, so that the water temperature in the lower area of ​​the heat storage section 2.2 is increased to above 60°C.

[0018] Combination Figure 1 It can be seen that the reheat cycle main pipe 6 is connected with a second pipe joint 7 corresponding to the first pipe joint 5 one by one above and below. The second pipe joint 7 and the first pipe joint 5 are connected by a flange, and the installation is simple and convenient.

[0019] During actual installation, a liquid level sensor is installed in the heat storage section 2.2, and the liquid level signal output end of the liquid level sensor is connected to the liquid level signal input end of the controller. When the liquid level in the heat storage section 2.2 is higher than the set liquid level, the air source heat pump unit 3, the first pump P1 and the second pump P2 are turned off, and water intake and heating are stopped; when the water in the heat storage section 2.2 is lower than the set liquid level, the first pump P1 is turned on to replenish water, and the second pump P2 and the air source heat pump unit 3 are turned on at the same time for circulation heating until the liquid level in the heat storage section reaches the highest water level to meet user needs.

[0020] The horizontal hot water tank 2 often has a certain length. To ensure that the water temperature in the lower area is above the set temperature, two or more rows of first pipe joints 5 can be arranged at intervals along the length direction of the hot water tank 2, and each row of first pipe joints 5 is connected to the reheating circulation main pipe 6 to achieve reheating of the lower area of ​​the hot water tank 2, thereby overcoming the problem that the existing civil hot water is easily hot and cold. In addition, the hot water tank 2 of the utility model is a horizontal structure, which greatly reduces the load-bearing per unit area of ​​the roof and reduces the impact on the roof structure. It is not only suitable for building roofs, but also suitable for refuge floors of high-rise buildings. Of course, it can also be directly installed on the outdoor ground, and the installation position is flexible and convenient.

[0021] It should be emphasized that the controller of the present invention can be a general-purpose processor, a special-purpose processor, a conventional processor, a digital signal processor (DSP), multiple microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) circuit, etc. It can also be a programmable logic controller (i.e., PLC) or an industrial computer.

[0022] Finally, it should be emphasized that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A civil hot water system based on an air source heat pump unit, comprising an air source heat pump unit and a hot water tank, Features: It also includes a reheat circulation unit; the hot water tank is a horizontal structure, the partition in the hot water tank divides it into a heating section and a heat storage section, and the top of the partition and the top wall of the hot water tank are arranged in an upper and lower interval; The heating section is connected to a cold water supply pipeline, the cold water supply pipeline has a first pipeline and a second pipeline that are interconnected, and a first pump is provided on the first pipeline, and a first valve is provided on the second pipeline; the air source heat pump unit forms a circulating heating loop through a third pipeline, a fourth pipeline and the heating section, and a second pump is provided on the third pipeline or the fourth pipeline; The reheat circulation unit includes a reheat circulation main pipe and a plurality of first pipe joints arranged side by side at intervals at the bottom of the heat storage section, the reheat circulation main pipe is connected with the first pipeline, and a second valve is arranged on the reheat circulation main pipe close to the first pipeline; each of the first pipe joints is connected with the reheat circulation main pipe, a temperature monitoring component is arranged at the water inlet of each first pipe joint and a third valve is arranged on the first pipe joint, a signal output end of the temperature monitoring component is connected with a signal input end of a controller, and control input ends of the first pump, the second pump, the first valve, the second valve and the third valve are all connected with a control output end of the controller.

2. The civil hot water system based on the air source heat pump unit according to claim 1, Features: The reheat cycle main pipe is a blind pipe with one end closed, and has a plurality of second pipe joints corresponding one by one to the first pipe joints, and the second pipe joints are flange-connected to the first pipe joints.

3. The civil hot water system based on the air source heat pump unit according to claim 1, Features: The hot water tank is provided with a liquid level sensor, and a liquid level signal output end of the liquid level sensor is connected to a liquid level signal input end of the controller.

4. The civil hot water system based on the air source heat pump unit according to claim 1, Features: The number of the reheat circulation units is two or more and they are arranged at intervals along the length direction of the hot water tank.

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