Heat exchanger of air source heat pump water heater

Abstract

The utility model is suitable for the field of heat pumps, and provides an air source heat pump water heater heat exchanger which comprises a water heater and an auxiliary heater. The water heater comprises an evaporator and a heat exchanger; a liquid storage tank and an expansion valve are sequentially arranged on a pipeline between the heat exchanger and the evaporator in the flowing direction of the liquid refrigerant; a gas-liquid separator and a compressor are sequentially arranged on the other pipeline between the evaporator and the heat exchanger in the flowing direction of the gaseous refrigerant; an auxiliary heater is further arranged on the cold water inlet pipe in series in the direction of injecting water into the heat exchanger. The water heater further comprises an intelligent controller which is electrically connected with the water heater and the auxiliary heater. The water heater and the auxiliary heater are used in cooperation, and the problems that a traditional water heater is difficult to operate at low temperature, frosts at low temperature and is low in water outlet temperature are solved; under the regulation and control of the intelligent controller, the water temperature in the water storage tank can be always kept in a required temperature interval.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pumps, and in particular relates to a heat exchanger, in particular to an air source heat pump water heater heat exchanger. Background Art

[0002] The application of low-temperature air source heat pump water heaters on offshore platforms is mainly reflected in its energy-saving and environmentally friendly characteristics. Since offshore platforms are usually located in areas far away from land, energy supply is relatively limited, and environmental protection requirements are high, the use of air source heat pump technology can effectively reduce energy consumption and reduce carbon emissions.

[0003] The air source heat pump absorbs low-temperature heat from the air and raises the temperature through a compressor, thereby providing hot water and heating services to the platform.

[0004] At present, traditional low-temperature air source heat pump water heaters, when used on offshore platforms, have the disadvantages of difficulty in low-temperature operation, low-temperature frost and low water outlet temperature. Specifically, the theoretical peak value of the heating temperature is limited and cannot meet the higher temperature requirements of offshore platforms. Moreover, it is difficult to operate at low temperatures. When the water temperature is below 20°C, the energy efficiency is low and it is easy to frost, requiring additional work to defrost. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an air source heat pump water heater heat exchanger, aiming to solve the technical problems of low temperature operation difficulty, low temperature frosting and low water outlet temperature when the traditional low temperature air source heat pump water heater is used on the offshore platform.

[0006] To achieve the above objectives, the utility model provides the following technical solutions.

[0007] An air source heat pump water heater heat exchanger, comprising a water heater and an auxiliary heater;

[0008] The water heater includes an evaporator and a heat exchanger;

[0009] A liquid storage tank and an expansion valve are sequentially arranged on a pipeline between the heat exchanger and the evaporator along the flow direction of the liquid refrigerant;

[0010] A gas-liquid separator and a compressor are sequentially arranged on another pipeline between the evaporator and the heat exchanger along the flow direction of the gaseous refrigerant;

[0011] It also includes a cold water inlet pipe, and an auxiliary heater is arranged in series along the upper edge of the cold water inlet pipe in the direction of injecting water into the heat exchanger;

[0012] It also includes an intelligent controller, which is electrically connected to the water heater and the auxiliary heater respectively.

[0013] Furthermore, the cold water inlet pipe is connected to the bottom water inlet of the heat exchanger.

[0014] Furthermore, it also includes a hot water outlet pipe, which is connected to the top water outlet of the heat exchanger.

[0015] Furthermore, a first filter is provided on a pipeline between the heat exchanger and the evaporator in the flow direction of the liquid refrigerant. The first filter is used to remove impurities in the refrigerant cycle, protect the internal cleanliness of the system, avoid damage to components due to clogging by impurities, and extend the service life of the water heater.

[0016] Furthermore, the cold water inlet pipe is sequentially provided with a water inlet valve, a second filter and a circulating pump along the direction of water injection into the heat exchanger, wherein the water inlet valve is used to control the on-off of the cold water inlet pipe so as to inject water into the heat exchanger through the cold water inlet pipe as needed, wherein during the water injection process, the circulating pump is used to provide water injection kinetic energy.

[0017] Furthermore, the intelligent controller adopts a PLC program controller with a 485 remote communication interface.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] When the water heater of the utility model is in operation, the outside air passes through the evaporator, and the refrigerant absorbs the heat in the air and evaporates; the evaporated refrigerant enters the gas-liquid separator for gas-liquid separation, and then the gaseous refrigerant enters the compressor, where it is compressed to increase the temperature and pressure; the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger to release heat and heat the water; the refrigerant after releasing heat is reduced in pressure and temperature by the expansion valve, and enters again to absorb heat, forming a closed cycle; the auxiliary heater of the utility model performs auxiliary heating on the water entering the heat exchanger in advance;

[0020] In summary, the utility model solves the problems of low-temperature operation difficulty, low-temperature frost and low water outlet temperature of traditional water heaters through the mutual cooperation of the water heater and the auxiliary heater;

[0021] Under the control of the intelligent controller, the water temperature in the water tank can always be maintained within the required temperature range to meet the customer's usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention.

[0023] Figure 1 A system structure diagram of a heat exchanger of an air source heat pump water heater provided by the utility model;

[0024] Figure 2 This is a control system structure diagram of the air source heat pump water heater heat exchanger of the utility model.

[0025] The reference numerals are as follows:

[0026] 100, water heater; 101, evaporator; 102, heat exchanger; 103, liquid storage tank; 104, first filter; 105, expansion valve; 106, gas-liquid separator; 107, compressor;

[0027] 200, auxiliary heater; 201, water inlet valve; 202, second filter; 203, circulation pump;

[0028] 300. Intelligent controller;

[0029] 400, cold water inlet pipe;

[0030] 500. Hot water outlet pipe. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0033] like Figure 1 and Figure 2 As shown, in one embodiment of the present disclosure, an air source heat pump water heater heat exchanger is provided, including a water heater 100 and an auxiliary heater 200, wherein the water heater 100 is used to heat water from a water tank.

[0034] For details, please refer to Figure 1 The water heater 100 provided in the embodiment of the present disclosure includes an evaporator 101, which is used to absorb heat from the outside air, wherein the refrigerant inside the evaporator evaporates under low pressure by absorbing the heat of the air, thereby converting the low-temperature heat energy of the outside into the internal energy of the refrigerant, thereby improving the efficiency of the system and ensuring that it can work normally even in the low-temperature environment of the offshore platform;

[0035] Furthermore, the water heater 100 of the disclosed embodiment also includes a heat exchanger 102, which is used to transfer the heat of the refrigerant to the water to heat the water, wherein the high-temperature and high-pressure gaseous refrigerant is liquefied in the heat exchanger 102 and releases heat to the cold water flowing through it, thereby heating the cold water to become hot water.

[0036] Please continue reading Figure 1 In the embodiment of the utility model, a liquid storage tank 103, a first filter 104 and an expansion valve 105 are sequentially arranged along the flow direction of the liquid refrigerant on a pipeline between the heat exchanger 102 and the evaporator 101, wherein:

[0037] The liquid storage tank 103 is mainly used to store refrigerant. The refrigerant liquefied in the heat exchanger 102 first enters the liquid storage tank 103. The liquid storage tank 103 has sufficient refrigerant to ensure the stable operation of the system. During the heat pump cycle, the state of the refrigerant changes continuously. The liquid storage tank 103 can also be used to adjust the flow of the refrigerant as needed to avoid affecting the overall operation of the water heater 100 due to excessive or insufficient flow.

[0038] The first filter 104 is used to remove impurities in the refrigerant cycle, protect the internal cleanliness of the system, avoid component damage caused by clogging by impurities, and extend the service life of the water heater 100.

[0039] The expansion valve 105 is used to control the flow rate of the refrigerant and reduce the pressure so that the refrigerant reaches a proper state before entering the evaporator 101 to improve the heat exchange efficiency.

[0040] Please continue to refer to Figure 1 In the embodiment of the present disclosure, a gas-liquid separator 106 and a compressor 107 are sequentially arranged along the flow direction of the gaseous refrigerant on another pipeline between the evaporator 101 and the heat exchanger 102, wherein the function of the gas-liquid separator 106 is to separate the gaseous and liquid refrigerants during the refrigerant circulation process, to ensure that the compressor 107 inhales the gaseous refrigerant, to prevent the occurrence of liquid hammer, and to ensure the safe operation of the compressor 107.

[0041] In actual operation, the working process of the water heater 100 is as follows: the outside air passes through the evaporator 101, and the refrigerant absorbs the heat in the air and evaporates; the evaporated refrigerant enters the gas-liquid separator 106 for gas-liquid separation, and then the gaseous refrigerant enters the compressor 107, and is compressed to increase the temperature and pressure; the high-temperature and high-pressure gaseous refrigerant enters the heat exchanger 102, releases heat to heat the water; the refrigerant after releasing heat passes through the expansion valve 105 to reduce the pressure and temperature, and then enters 11 again to absorb heat, forming a closed cycle.

[0042] For further information, see Figure 1The utility model further includes a cold water inlet pipe 400 and a hot water outlet pipe 500. The cold water inlet pipe 400 is connected to the bottom water inlet of the heat exchanger 102, and the hot water outlet pipe 500 is connected to the top water outlet of the heat exchanger 102. Low-temperature water enters the heat exchanger 102 through the cold water inlet pipe 400. In the heat exchanger 102, the heat released by the refrigerant is transferred to the water, which is heated to form hot water. The hot water is discharged through the hot water outlet pipe 500.

[0043] Preferably, in the embodiment of the present disclosure, the cold water inlet pipe 400 is provided with a water inlet valve 201, a second filter 202 and a circulation pump 203 in sequence along the direction of water injection into the heat exchanger 102, wherein the water inlet valve 201 is used to control the on-off of the cold water inlet pipe 400, so as to inject water into the heat exchanger 102 through the cold water inlet pipe 400 as needed, wherein during the water injection process, the circulation pump 203 is used to provide water injection kinetic energy;

[0044] In addition, the second filter 202 provided in the present disclosure is used to filter water during the water injection process of the cold water inlet pipe 400 .

[0045] As a preference, Figure 1 and Figure 2 As shown, in the embodiment of the present disclosure, an auxiliary heater 200 is also arranged in series on the cold water inlet pipe 400 in the direction of injecting water into the heat exchanger 102. The auxiliary heater 200 performs heat exchange based on a carbon fiber heater combined with high-temperature resistant thermal oil to perform auxiliary heating of the water entering the heat exchanger 102 in advance; heat exchange based on a carbon fiber heater combined with high-temperature resistant thermal oil means that the heat generated by the carbon fiber heater is transferred to the object to be heated (the water flowing through the cold water inlet pipe 400) through the high-temperature resistant thermal oil.

[0046] Preferably, the utility model also includes an intelligent controller 300, which adopts a PLC program controller with a built-in 485 remote communication interface; the intelligent controller 300 is electrically connected to the water heater 100 and the auxiliary heater 200 respectively, and the intelligent controller 300 is used to control the operation of each electrical component in the water heater 100 and the auxiliary heater 200.

[0047] The utility model solves the defects of the traditional water heaters such as the difficulty of low-temperature operation, low-temperature frosting and low water outlet temperature (55°C) by using the water heater 100 and the auxiliary heater 200 in coordination with each other, and can fully meet the actual application environment and requirements of the offshore platform.

[0048] In order to better and more reasonably coordinate and cooperate with each other between the water heater 100 and the auxiliary heater 200, so as to maximize energy utilization and minimize energy consumption, and enable the water heater 100 and the auxiliary heater 200 to operate better; the utility model uses an intelligent controller 300 to realize intermittent operation between the water heater 100 and the auxiliary heater 200.

[0049] To solve the problems of low-temperature operation difficulty, low-temperature frost and low water outlet temperature of air source water heaters: when the ambient temperature is below 10 degrees Celsius, the intelligent controller 300 is first used to control the auxiliary heater 200 to start working. When the water temperature in the water storage tank is raised to 10°C or above, the water heater 100 starts working and the auxiliary heater 200 stops working;

[0050] When the water temperature in the water storage tank rises to 48°C or above, the auxiliary heater 200 starts to preheat and gradually work;

[0051] When the water temperature in the water storage tank rises to 53°C or above, the water heater 100 stops running, and the auxiliary heating circulation heat exchanger continues to raise the water temperature in the water storage tank to 68°C. At this time, the entire set of new intelligent heat exchangers stops working, completing a heating cycle;

[0052] When the water temperature in the water storage tank drops to 45°C due to various reasons, the utility model will automatically repeat the above heating automatic operation mode to ensure that the water temperature in the water storage tank can always be maintained between 45°C and 68°C to meet the use requirements of customers.

[0053] The above solutions are only an illustration of a preferred example, but are not limited thereto. When implementing the present utility model, appropriate replacement and / or modification can be performed according to user needs.

[0054] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0055] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. An air source heat pump water heater heat exchanger, characterized in that: It comprises a water heater (100) and an auxiliary heater (200); The water heater (100) comprises an evaporator (101) and a heat exchanger (102); A liquid storage tank (103) and an expansion valve (105) are sequentially arranged on a pipeline between the heat exchanger (102) and the evaporator (101) along the flow direction of the liquid refrigerant; A gas-liquid separator (106) and a compressor (107) are sequentially arranged on another pipeline between the evaporator (101) and the heat exchanger (102) along the flow direction of the gaseous refrigerant; It also includes a cold water inlet pipe (400), and an auxiliary heater (200) is arranged in series along the cold water inlet pipe (400) in the direction of injecting water into the heat exchanger (102); It also includes an intelligent controller (300), which is electrically connected to the water heater (100) and the auxiliary heater (200) respectively.

2. The air source heat pump water heater heat exchanger according to claim 1, characterized in that: The cold water inlet pipe (400) is connected to the bottom water inlet of the heat exchanger (102).

3. The air source heat pump water heater heat exchanger according to claim 2, characterized in that: It also includes a hot water outlet pipe (500), which is connected to the top water outlet of the heat exchanger (102).

4. The air source heat pump water heater heat exchanger according to claim 3, characterized in that: A first filter (104) is also provided on a pipeline between the heat exchanger (102) and the evaporator (101) along the flow direction of the liquid refrigerant.

5. The air source heat pump water heater heat exchanger according to claim 4, characterized in that: The cold water inlet pipe (400) is provided with a water inlet valve (201), a second filter (202) and a circulation pump (203) in sequence along the direction of injecting water into the heat exchanger (102).

6. An air source heat pump water heater heat exchanger according to any one of claims 2 to 5, characterized in that: The intelligent controller (300) adopts a PLC program controller with a built-in 485 remote communication interface.

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