Multi-mode heat pump water temperature subsection control device

Abstract

The utility model discloses a multi-mode heat pump water temperature subsection control device which comprises a control device body, the control device body comprises a controller and a temperature sensor assembly, the temperature sensor assembly is arranged in a heat pump mechanism, and the heat pump mechanism and the temperature sensor assembly are respectively and electrically connected with the controller. The utility model provides a multi-mode heat pump water temperature subsection control device which comprises a control device body, the control device body comprises a controller and a temperature sensor assembly, specifically, the temperature sensor assembly is installed in a heat pump mechanism, and the temperature sensor assembly is installed in the heat pump mechanism. The heat pump mechanism and the temperature sensor assembly are electrically connected with the controller. Therefore, the temperature of the heat pump mechanism is monitored through the temperature sensor assembly, the surrounding environment temperature is also monitored, monitored temperature data are sent to the controller, and the heat pump unit is controlled to stop according to which value by judging a limit value and a target value set by a user.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pump control devices, and more specifically, to a multi-mode heat pump water temperature segmented control device. Background Art

[0002] Heat pump is a highly efficient energy-saving device that fully utilizes low-grade thermal energy. Heat can be transferred spontaneously from a high-temperature object to a low-temperature object, but not spontaneously in the opposite direction. The working principle of a heat pump is a mechanical device that forces heat to flow from a low-temperature object to a high-temperature object in a reverse cycle. It consumes only a small amount of reverse cycle net work to obtain a large amount of heat supply, and can effectively utilize the low-grade thermal energy that is difficult to use to achieve energy saving.

[0003] However, the existing fixed-frequency heat pump water heaters or heating units have an unavoidable shortcoming, which is that they are limited by a single water temperature upper limit setting. This fixed setting makes it difficult for the unit to respond flexibly under different ambient temperatures and load demands, especially when facing extreme climates. In actual use, when the ambient temperature is too low or too high, the user can easily cause the load demand to exceed the design capacity of the unit by setting the default water temperature upper limit, which makes the heat pump system easily fall into the dilemma of over-operation. This abnormal operating state will not only lead to a significant decrease in energy efficiency and impaired system stability, but may also cause a series of serious consequences such as compressor overload and damage to key components.

[0004] Therefore, it is necessary to propose a multi-mode heat pump water temperature segmented control device to at least partially solve the problems existing in the prior art. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which will be further described in detail in the detailed implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and essential technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] In order to at least partially solve the above-mentioned problems, the utility model provides a multi-mode heat pump water temperature segmented control device, including: a control device body, the control device body includes a controller, a temperature sensor assembly, the temperature sensor assembly is configured in a heat pump mechanism, and the heat pump mechanism and the temperature sensor assembly are electrically connected to the controller respectively.

[0007] According to the multi-mode heat pump water temperature segmented control device of the embodiment of the utility model, the heat pump mechanism includes a compressor, a four-way valve, a condenser, a liquid storage tank, a heat exchanger, a fin evaporator, and a gas-liquid separator. The compressor is respectively connected to the heat exchanger, the gas-liquid separator, and the four-way valve. The heat exchanger is connected to the condenser through the liquid storage tank. The condenser is connected to the four-way valve. The heat exchanger and the four-way valve are respectively connected to the fin evaporator.

[0008] According to the multi-mode heat pump water temperature segmented control device of the embodiment of the utility model, an evaporator fan is configured in the fin evaporator, and the temperature sensor assembly includes inlet and outlet water temperature sensors and an ambient temperature sensor. The evaporator fan, inlet and outlet water temperature sensors, and ambient temperature sensor are electrically connected to the controller respectively.

[0009] According to the multi-mode heat pump water temperature segmented control device of the embodiment of the utility model, a main circuit electronic expansion valve is also arranged between the heat exchanger and the fin evaporator.

[0010] According to the multi-mode heat pump water temperature segmented control device of the embodiment of the utility model, an auxiliary electronic expansion valve is arranged between the heat exchanger and the main electronic expansion valve.

[0011] According to the multi-mode heat pump water temperature segmented control device of the embodiment of the utility model, a filter is arranged between the main electronic expansion valve and the fin evaporator.

[0012] Compared with the prior art, the present invention has at least the following beneficial effects:

[0013] The utility model provides a multi-mode heat pump water temperature segmented control device, which includes a control device body, and the control device body includes a controller and a temperature sensor assembly. Specifically, the temperature sensor assembly is installed in the heat pump mechanism, and the heat pump mechanism and the temperature sensor assembly are electrically connected to the controller respectively. Therefore, the temperature of the heat pump mechanism is monitored by the temperature sensor assembly, and the surrounding ambient temperature is also monitored, and the monitored temperature data is sent to the controller, and by judging the limit value and the target value set by the user, the heat pump unit is controlled to perform shutdown at which value.

[0014] The multi-mode heat pump water temperature segmented control device described in the utility model, other advantages, objectives and features of the utility model will be reflected in part through the following description, and in part will also be understood by technical personnel in the field through research and practice of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of the heat pump mechanism in the utility model.

[0017] Figure 2 It is a schematic diagram of the connection structure of the controller in the utility model.

[0018] Figure 3 This is a temperature detection value diagram of the controller in the utility model. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can implement the invention with reference to the description.

[0020] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0021] like Figure 1-Figure 3 As shown, the utility model provides a multi-mode heat pump water temperature segmented control device, including: a control device body, the control device body includes a controller, a temperature sensor assembly, specifically, the temperature sensor assembly is installed in the heat pump mechanism, and the heat pump mechanism and the temperature sensor assembly are electrically connected to the controller respectively. Therefore, the temperature of the heat pump mechanism is monitored by the temperature sensor assembly, and the surrounding ambient temperature is also monitored, and the monitored temperature data is sent to the controller. According to the current ambient temperature Th and water temperature Ti, the controller can search for the preset initial value preset in the RAM according to the ambient temperature Th and water temperature Ti, wherein the preset value corresponds to a different environment and water temperature. Figure 3 The value in is used as the preset control temperature limit value for the corresponding temperature range. By judging the limit value and the target value set by the user, the heat pump unit is controlled to shut down at which value.

[0022] Parameter name (definition) Setting range default value Remark High Environment Limit 1 Tenv1(-40℃~30℃) 18℃ Low Environment Limit 2 Tenv2(-40℃~0℃) -10℃ Low environmental limit 3 Tenv3(-40℃~0℃) -20℃ Low Environment Limit 4 Tenv4(-40℃~0℃) -30℃ High ambient heating / hot water limit 1 Ts1(20℃~55℃) 50℃ Low ambient heating / hot water limit 2 Ts2(20℃~55℃) 50℃ Low ambient heating / hot water limit 3 Ts3(20℃~55℃) 48℃ Low ambient heating / hot water limit 4 Ts4(20℃~55℃) 45℃

[0023] Table 1

[0024] like Figure 3As shown in Table 1, Tenv1: [High ambient limit 1], Ts1: [High ring heating / hot water upper limit 1], Tenv2: [Low ambient limit 2], Ts2: [Low ring heating / hot water upper limit 2], Tenv3: [Low ambient limit 3], Ts3: [Low ring heating / hot water upper limit 3], Tenv4: [Low ambient limit 3], Ts4: [Low ring heating / hot water upper limit 4]. In the actual operation of the heat pump mechanism, the ambient temperature Ta is detected in real time through the NTC sensor (the NTC sensor is installed on the outer surface of the unit). The controller determines which range the uploaded ambient temperature falls into. When the user sets the temperature to exceed the upper limit of the control temperature, the heat pump mechanism actually presets the upper limit temperature to execute the shutdown process to ensure the safety of the compressor. For example: when the ambient temperature Td≥Tenv1 preset temperature, the actual upper limit temperature of the heat pump control temperature is preset Ts1. When the water temperature reaches the target value, the heat pump unit immediately executes the shutdown process, and the corresponding icon is displayed on the online control, and the feedback unit is shut down due to temperature limit. Similarly, in the corresponding operation process, if the ambient temperature Ta is continuously judged and Tenv1>Ta≥Tenv2-2, the water temperature control is limited to the upper limit of 55℃, and no temperature limit process is performed. When it is detected that Tenv2-2>Ta≥Tenv3, the upper limit temperature of the heat pump control temperature is Ts3, and so on.

[0025] The utility model can judge the current environment and perform segmented limit control on the upper limit of the water temperature. This avoids the situation of operating in an ultra-compressor condition when only a single temperature control is used, which affects the life of the compressor. At the same time, it avoids the use of electric auxiliary heating, which makes it impossible to fully utilize the high energy efficiency of the heat pump to make hot water in the low water temperature section, and reduces the energy efficiency of making hot water under ultra-low temperature conditions. It achieves the effect of fast and efficient hot water production under ultra-low temperature conditions below -20℃, and can greatly improve the reliability of the unit.

[0026] Furthermore, the heat pump mechanism includes a compressor 1, a four-way valve 2, a condenser 3, a liquid storage tank 4, a heat exchanger 5, a finned evaporator 8, and a gas-liquid separator 10, wherein the compressor 1 is respectively connected to the heat exchanger 5, the gas-liquid separator 10, and the four-way valve 2, the heat exchanger 5 is connected to the condenser 3 through the liquid storage tank 4, the condenser 3 is connected to the four-way valve 2, and the heat exchanger 5 and the four-way valve 2 are respectively connected to the finned evaporator 8. Through the design of the above structure, the heat pump mechanism can produce heat to meet the use needs.

[0027] Furthermore, an evaporator fan 9 is installed in the fin evaporator 8, and the evaporator fan 9 is used to accelerate the air flow and improve the heat dissipation efficiency. The temperature sensor assembly includes an inlet and outlet water temperature sensor 12 and an ambient temperature sensor 13, which are respectively installed on the fin evaporator 8 and are used to monitor the water temperature in the pipeline passing through the fin evaporator 8 and the ambient temperature. The evaporator fan 9, the inlet and outlet water temperature sensor 12, and the ambient temperature sensor 13 are respectively electrically connected to the controller, so the controller can control the rotation speed of the evaporator fan 9 to adjust the heat dissipation efficiency; and the inlet and outlet water temperature sensor 12 and the ambient temperature sensor 13 can send the monitored temperature data to the controller, and the controller can realize the above-mentioned shutdown of the heat pump unit according to which value.

[0028] Furthermore, a main electronic expansion valve 7 is installed between the heat exchanger 5 and the fin evaporator 8, an auxiliary electronic expansion valve 6 is installed between the heat exchanger 5 and the main electronic expansion valve 7, and a filter 11 is installed between the main electronic expansion valve 7 and the fin evaporator 8. The water circuit is regulated by the auxiliary electronic expansion valve 6 and the main electronic expansion valve 7, and the filter 11 can filter the water to filter out the scale in the water.

[0029] Furthermore, a return air temperature sensor 14 and a low pressure sensor 16 are installed between the compressor 1 and the gas-liquid separator 10, an exhaust temperature sensor 17 is installed between the compressor 1 and the four-way valve 2, and an external coil temperature sensor 15 is installed on the fin evaporator 8 to monitor its temperature.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A multi-mode heat pump water temperature segmented control device, characterized in that: include: The control device body includes a controller and a temperature sensor assembly. The temperature sensor assembly is arranged in the heat pump mechanism. The heat pump mechanism and the temperature sensor assembly are electrically connected to the controller respectively.

2. A multi-mode heat pump water temperature segmented control device according to claim 1, characterized in that: The heat pump mechanism includes a compressor, a four-way valve, a condenser, a liquid storage tank, a heat exchanger, a fin evaporator, and a gas-liquid separator. The compressor is respectively connected to the heat exchanger, the gas-liquid separator, and the four-way valve. The heat exchanger is connected to the condenser through the liquid storage tank. The condenser is connected to the four-way valve. The heat exchanger and the four-way valve are respectively connected to the fin evaporator.

3. A multi-mode heat pump water temperature segmented control device according to claim 2, characterized in that: The fin evaporator is provided with an evaporator fan, the temperature sensor assembly comprises an inlet and outlet water temperature sensor and an ambient temperature sensor, and the evaporator fan outlet water temperature sensor and the ambient temperature sensor are electrically connected to the controller respectively.

4. A multi-mode heat pump water temperature segmented control device according to claim 2, characterized in that: A main circuit electronic expansion valve is also arranged between the heat exchanger and the finned evaporator.

5. A multi-mode heat pump water temperature segmented control device according to claim 4, characterized in that: An auxiliary electronic expansion valve is arranged between the heat exchanger and the main electronic expansion valve.

6. A multi-mode heat pump water temperature segmented control device according to claim 4, characterized in that: A filter is arranged between the main electronic expansion valve and the fin evaporator.

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