Heat pump unit and air conditioning system

Abstract

The utility model discloses a heat pump unit and an air conditioning system. The heat pump unit comprises a refrigerant flow path, a plurality of heat exchange assemblies and a plurality of adjusting valves, wherein the heat exchange assemblies and the adjusting valves are arranged on the refrigerant flow path and can be used for adjusting working modes of the heat pump unit. At least one heat exchange assembly in the heat exchange assemblies is composed of a first heat exchange part and a second heat exchange part, and heat exchange can be conducted between the first heat exchange part and the second heat exchange part. Compared with the prior art, the fin type heat exchanger and the driving plate heat exchanger are arranged to be composed of the two heat exchange parts, heat exchange can be conducted between the two heat exchange parts, and therefore waste heat of the fin type heat exchanger, invalid heat dissipation of the driving plate radiator and other part of heat can be used in a combined mode to conduct heating or water heating. Comprehensive management and reasonable utilization of a plurality of heat sources in different working modes are realized, and the utilization rate of heat is improved.

Description

A heat pump unit and air conditioning system Technical Field

[0001] This utility model relates to the field of refrigeration and heating, and in particular to a heat pump unit and air conditioning system. Background Technology

[0002] Air source heat pump units absorb (release) heat from the air and release (absorb) heat into the air conditioning system, thereby providing heating (cooling) to the room. Air source heat pump units are currently the mainstream products on the market. Their drive boards typically have 5% to 8% of the input electrical power as ineffective heat generation. This portion of heat is generally dissipated into the air, resulting in ineffective heat dissipation.

[0003] In addition, when the heat pump unit is cooling, it dissipates heat into the air through the outdoor fins, resulting in some ineffective heat loss.

[0004] When a heat pump unit is heating or heating water, frost will form on its fins when the outdoor temperature is low. This frost layer can impede airflow and heat exchange, reducing the unit's efficiency or even causing it to fail. Therefore, periodic defrosting is necessary. A common method is to reverse the direction of the four-way valve, allowing the heat pump unit to extract heat from the air conditioning system's hot water system and release that heat back onto the fins, melting the frost into water which is then discharged. During defrosting, the heat pump absorbs heat from the air conditioning system, causing a drop in room temperature, reducing the effective heating capacity of the heat pump air conditioner, and leading to discomfort due to the lower room temperature.

[0005] As can be seen from the above operation process of the heat pump unit, there are two parts of ineffective heat loss in the heat pump unit. At the same time, there is a heat demand when defrosting is required. Therefore, how to utilize the ineffective heat dissipation of the heat pump unit for heating and hot water production can achieve the rational utilization of heat.

[0006] Therefore, how to design a heat pump unit and air conditioning system that can achieve the rational utilization of heat is a technical problem that the industry urgently needs to solve. Summary of the Invention

[0007] In view of the problem of heat waste in the operation of heat pump units in the prior art, this utility model proposes a heat pump unit and an air conditioning system.

[0008] The technical solution of this utility model is to propose a heat pump unit, characterized in that it includes a refrigerant flow path and a plurality of heat exchange components and regulating valves disposed on the refrigerant flow path for adjusting the working mode of the heat pump unit;

[0009] At least one heat exchange assembly consists of a first heat exchange section and a second heat exchange section, and the first heat exchange section and the second heat exchange section can exchange heat.

[0010] Furthermore, the heat exchange assembly includes: a plate heat exchanger, a finned heat exchanger, and a drive plate heat exchanger;

[0011] The plate heat exchanger is a refrigerant-water heat exchanger.

[0012] The finned heat exchanger has a refrigerant-air heat exchange tube serving as a first heat exchange section and a refrigerant-water heat exchange tube serving as a second heat exchange section, and the refrigerant-air heat exchange tube and the refrigerant-water heat exchange tube are connected in series on the same fin.

[0013] The drive plate heat exchanger has an air-cooled radiator serving as a first heat exchange section and a water-cooled heat exchange tube serving as a second heat exchange section. Both the air-cooled radiator and the water-cooled heat exchange tube are connected to the drive plate for heat exchange.

[0014] Furthermore, the regulating valve includes a first regulating valve connected between the hot water pump and the drive plate heat exchanger, a second regulating valve connected between the hot water pump and the drive plate heat exchanger via the finned heat exchanger, a third regulating valve and a fourth regulating valve connected in series between the hot water tank and the plate heat exchanger, a sixth regulating valve connected between the indoor unit of the air conditioner and the plate heat exchanger, a seventh regulating valve connected between the air conditioner pump and the plate heat exchanger, and a fifth regulating valve connected at one end between the plate heat exchanger and the sixth regulating valve, and at the other end between the hot water tank and the fourth regulating valve. The drive plate heat exchanger is also connected between the third regulating valve and the fourth regulating valve.

[0015] Furthermore, the heat pump unit has a single heating mode, and in the single heating mode, the sixth regulating valve and the seventh regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0016] Furthermore, the heat pump unit has a single hot water mode, and in the single hot water mode, the first regulating valve, the third regulating valve, and the fifth regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0017] Furthermore, the heat pump unit has a single cooling mode, and in the single cooling mode, the sixth regulating valve and the seventh regulating valve are opened, the plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube in the finned heat exchanger and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

[0018] Furthermore, the heat pump unit also has a heating and non-stop defrosting mode, and a heating and heat recovery mode;

[0019] In the heating and non-stop defrosting modes, the second, fourth, sixth, and seventh regulating valves are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes and refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat.

[0020] In the heating and heat recovery mode, the first regulating valve, the fourth regulating valve, the sixth regulating valve, and the seventh regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0021] Furthermore, the heat pump unit also has a hot water production and non-stop defrosting mode. In the hot water production and non-stop defrosting mode, the second regulating valve, the third regulating valve, and the fifth regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes and the refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat.

[0022] Furthermore, the heat pump unit also has a cooling and heat recovery mode, and in the cooling and heat recovery mode, the second regulating valve, the fourth regulating valve, the sixth regulating valve, and the seventh regulating valve are opened, the plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube, the refrigerant-water heat exchange tube in the finned heat exchanger, and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

[0023] This utility model also proposes an air conditioning system, which has the above-mentioned heat pump unit.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] This utility model features a finned heat exchanger with a refrigerant-air heat exchange tube serving as the first heat exchange section and a refrigerant-water heat exchange tube serving as the second heat exchange section. A drive plate heat exchanger has an air-cooled radiator serving as the first heat exchange section and a water-cooled heat exchange tube serving as the second heat exchange section. Heat exchange can occur between the first and second heat exchange sections, allowing this utility model to utilize the heat loss of both the drive plate heat exchanger and the finned heat exchanger. Furthermore, with the control of a regulating valve, this utility model can use the heat loss of both the drive plate heat exchanger and the finned heat exchanger to produce hot water and provide heating for the air conditioning system. It also utilizes the hot water in the hot water tank and the heat loss of the drive plate heat exchanger for defrosting, improving comfort during defrosting. This allows for comprehensive management and utilization of multiple heat sources in the heat pump unit under three different modes: single cooling mode, single heating mode, and single hot water mode. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 is a schematic diagram of the structure of the heat pump unit proposed in this utility model;

[0028] Figure 2 is a flowchart of the present invention in single heating mode;

[0029] Figure 3 is a flowchart of the present invention in both heating and non-stop defrosting modes;

[0030] Figure 4 is a flowchart of the present invention in the heating and heat recovery modes;

[0031] Figure 5 is a flowchart of the present invention in single-system hot water mode;

[0032] Figure 6 is a flowchart of the present invention in the hot water production and non-stop defrosting modes;

[0033] Figure 7 is a flowchart of the present invention in single refrigeration mode;

[0034] Figure 8 is a flowchart of the present invention in the refrigeration and heat recovery mode;

[0035] Figure 9 is a structural schematic diagram of the finned heat exchanger of this utility model;

[0036] Figure 10 is a structural schematic diagram of the drive plate heat exchanger in this utility model;

[0037] Figure 11 is the action logic table of the corresponding control valve switching state under each working mode in this utility model;

[0038] Figure 12 is a logic table showing the state of each heat source corresponding to each working mode in this utility model. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] Therefore, a feature described in this specification is intended to illustrate one aspect of one embodiment of the present invention, and not to imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. While certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly described. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0041] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0042] Currently, air source heat pump units are the mainstream products on the market. Their drive boards typically have 5% to 8% of the input electrical power as ineffective heat generation. This part of the heat is generally dissipated into the air, resulting in ineffective heat dissipation. In addition, when the heat pump unit is cooling, the heat pump unit dissipates heat into the air through the outdoor fins, which also results in some ineffective heat loss.

[0043] This utility model addresses the problems existing in the prior art by proposing a heat pump unit, which includes a refrigerant flow path and a plurality of heat exchange components and regulating valves disposed on the refrigerant flow path for adjusting the working mode of the heat pump unit.

[0044] At least one heat exchange assembly consists of a first heat exchange section and a second heat exchange section, and heat exchange can be performed between the first heat exchange section and the second heat exchange section.

[0045] Based on the aforementioned heat pump unit, the design concept of this utility model is to configure the finned heat exchanger and the drive plate heat exchanger to have two heat exchange sections. In this way, when there is ineffective heat dissipation in the finned heat exchanger, the heat dissipated by that part of the finned heat exchanger can be obtained through heat exchange between the two heat exchange sections.

[0046] Similarly, when there is ineffective heat generation in the drive plate heat exchanger, the ineffective heat generation of the drive plate heat exchanger can be obtained through heat exchange between the two heat exchange sections.

[0047] With this configuration, the present invention can utilize the original heat loss in each heat exchange component, and then, in conjunction with the regulating valve and refrigerant flow path provided in the present invention, realize the transfer of heat in the entire heat pump unit, and transfer this part of the heat to different systems to achieve the rational utilization of heat.

[0048] Please refer to Figures 9 and 10. The heat exchange components in this utility model include: a plate heat exchanger, a finned heat exchanger, and a drive plate heat exchanger.

[0049] Among them, the plate heat exchanger is a refrigerant-water heat exchanger;

[0050] The finned heat exchanger has a refrigerant-air heat exchange tube as a first heat exchange section and a refrigerant-water heat exchange tube as a second heat exchange section, and the refrigerant-air heat exchange tube and the refrigerant-water heat exchange tube are connected in series on the same fin.

[0051] The drive plate heat exchanger has an air-cooled radiator serving as a first heat exchange section and a water-cooled heat exchange tube serving as a second heat exchange section. Both the air-cooled radiator and the water-cooled heat exchange tube are connected to the drive plate for heat exchange.

[0052] Figure 9 is a schematic diagram of the structure of the finned heat exchanger of this utility model. It can be seen that the finned heat exchanger of this utility model consists of two heat exchange tubes: a refrigerant-air heat exchange tube and a refrigerant-water heat exchange tube. Here, the refrigerant-air heat exchange tube is the first heat exchange section, and the refrigerant-water heat exchange tube is the second heat exchange section. Since the two heat exchange tubes are connected in series on the same fin, heat exchange can occur between these two parts. As mentioned earlier, when the heat pump unit is cooling, the fins dissipate heat into the air, resulting in ineffective heat loss. In this utility model, by dividing the finned heat exchanger into a refrigerant-air heat exchange tube and a refrigerant-water heat exchange tube, when the fins dissipate heat into the air (i.e., when the refrigerant-air heat exchange tube dissipates heat), this heat can be transferred to the refrigerant-water heat exchange tube, thereby utilizing this heat to provide heat for subsequent single heating mode and single hot water mode.

[0053] Figure 10 is a schematic diagram of the drive plate heat exchanger in this utility model, which includes an air-cooled radiator and a water-cooled heat exchange tube. Here, the air-cooled radiator is the first heat exchange part, and the water-cooled heat exchange tube is the second heat exchange part. As can be seen from the previous description, the drive plate usually has 5% to 8% of the input electrical power as ineffective heat generation, which is generally dissipated to the air through the air-cooled radiator. In this utility model, after adopting the above two heat exchange parts, this part of ineffective heat generation can be obtained through the water-cooled heat exchange tube and then used to provide heat in the subsequent single heating mode and single hot water mode.

[0054] In addition, the heat exchange component in this utility model also includes a plate heat exchanger, which is a refrigerant-water heat exchanger. Its composition is the same as that of a traditional plate heat exchanger, and it is mainly used for heat transfer.

[0055] As can be seen from the above settings, this utility model adjusts the structure of the heat exchange component, setting it as a first heat exchange part and a second heat exchange part, which can obtain the ineffective heat generated in the heat exchange component and use it for heating in other modes, thus realizing the rational utilization of heat.

[0056] Please refer to Figure 1. In this utility model, there are seven regulating valves, including a first regulating valve connected between the hot water pump and the drive plate heat exchanger, a second regulating valve connected between the hot water pump and the drive plate heat exchanger via the finned heat exchanger, a third regulating valve and a fourth regulating valve connected in series between the hot water tank and the plate heat exchanger, a sixth regulating valve connected between the air conditioner indoor unit and the plate heat exchanger, a seventh regulating valve connected between the air conditioner water pump and the plate heat exchanger, and a fifth regulating valve connected at one end between the plate heat exchanger and the sixth regulating valve, and at the other end between the hot water tank and the fourth regulating valve. The drive plate heat exchanger is also connected between the third regulating valve and the fourth regulating valve.

[0057] Here, the first regulating valve is valve 1 in Figure 1, the second regulating valve is valve 2 in Figure 1, the third regulating valve is valve 3 in Figure 1, the fourth regulating valve is valve 4 in Figure 1, the fifth regulating valve is valve 5 in Figure 1, the sixth regulating valve is valve 6 in Figure 1, and the seventh regulating valve is valve 7 in Figure 1. All seven regulating valves are two-way valves, which can directly control the on / off state of the refrigerant flow path. Currently, most existing solutions use four-way valves. When the heat pump unit defrosts, the reversing adjustment of the four-way valve is more complicated. However, this valve uses two-way valves instead of four-way valves, which not only enables the control of the heat pump unit during defrosting, but also makes it easier to adjust the on / off state of each refrigerant flow path, improving the comfort during defrosting.

[0058] In Figure 1, the plate heat exchanger is the same as the plate heat exchanger mentioned above. The drive plate heat exchanger is located inside the electrical box (directly referred to as the electrical box in Figure 1). The fins in Figure 1 are the same as the finned heat exchanger mentioned above.

[0059] The purpose of setting up the above-mentioned multiple regulating valves in this utility model is mainly to control the flow direction of the refrigerant, thereby realizing heat transfer and enabling the heat pump unit to operate in different working modes. Please refer to Figure 11. The heat pump unit in this utility model has seven working modes, namely, single heating mode, single hot water mode, single cooling mode, heating and non-stop defrosting mode (i.e., single heating mode + non-stop defrosting in Figure 11), heating and heat recovery mode (i.e., heating mode + heat recovery from the electrical box to produce hot water in Figure 11), hot water production and non-stop defrosting mode (i.e., single heating mode + non-stop defrosting in Figure 11), and hot water production and non-stop defrosting mode (i.e., single heating mode + non-stop defrosting in Figure 11). Figure 11 shows the hot water production mode (with non-stop defrosting) and the cooling heat recovery mode (cooling mode + finned heat recovery hot water). Valves 1 to 7 correspond to the first to seventh regulating valves mentioned above. It can be clearly seen from Figure 11 that the opening and closing states of the regulating valves are different in each working mode. That is, by setting up the above multiple regulating valves, this utility model can control the working mode of the heat pump unit by reasonably closing and opening each regulating valve, and realize the reasonable utilization of the ineffective heat in the above finned heat exchanger and drive plate heat exchanger.

[0060] Here, the drive plate heat exchanger is actually installed inside the electrical box. Therefore, in the above figures 1 to 8, this utility model is described directly as the electrical box and is not directly pointed out as the drive plate heat exchanger.

[0061] The following description, in conjunction with Figures 2 to 8 and Figure 12, explains the various working modes of this utility model. It should be noted that in Figures 2 to 8, the arrows indicate the refrigerant flow direction, the thick solid lines indicate the air conditioner hot water flow path, the thick dashed lines (with smaller intervals) indicate the fin defrosting water flow path, the thick dashed lines (with larger intervals) indicate the hot water flow path, and the non-thick dashed lines indicate the cooling water flow path.

[0062] Please refer to Figure 2 and Figure 12. In this utility model, the heat pump unit has a single heating mode. In the single heating mode, the sixth and seventh regulating valves are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0063] Figure 2 shows the flow direction of the refrigerant in the single heating mode, and Figure 12 shows the heat absorption and release states of each heat exchange component in the single heating mode. Combining Figure 2 and Figure 12, it can be seen that in the single heating mode, the present invention can enable the finned heat exchanger to absorb heat from the air and then release heat to the plate heat exchanger by controlling the sixth regulating valve and the seventh regulating valve to produce hot water and release heat to the room, thereby realizing the single heating mode.

[0064] In other words, this utility model can control the transfer of refrigerant and heat through the control of the above-mentioned regulating valve, so as to realize the above-mentioned single heating mode for releasing heat to the room.

[0065] Please refer to Figure 5 and Figure 12. In this utility model, the heat pump unit has a single hot water mode. In the single hot water mode, the first regulating valve, the third regulating valve, and the fifth regulating valve are opened. The water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0066] Figure 5 shows the flow direction of the refrigerant in the single hot water mode, and Figure 12 shows the heat absorption and heat release states of each heat exchange component in the single hot water mode. Combining Figure 5 and Figure 12, it can be seen that in the single heating mode, the present invention, by opening the first regulating valve, the third regulating valve, the fifth regulating valve and the hot water pump, allows the hot water in the hot water tank to be preheated by passing through the water-cooled heat exchange tubes in the drive plate radiator, then reheated by passing through the plate heat exchanger, and then returned to the hot water tank. Hot water can be produced free of charge using the water-cooled heat exchange tubes of the drive plate radiator, and the heat dissipation of the drive plate is ensured.

[0067] Here, the drive board radiator is installed in the electrical box. When the electrical box is working, the drive board will have 5% to 8% of ineffective heat generation, which will be dissipated into the air through the air-cooled radiator. After the above control, this utility model can obtain this part of the heat by utilizing the heat exchange between the water-cooled heat exchange tube and the air-cooled radiator. Then, by controlling the regulating valve, this part of the heat can be used to produce hot water. This not only ensures the reuse of this part of ineffective heat, but also ensures good heat dissipation of the drive board itself.

[0068] Please refer to Figure 7 and Figure 12. In this utility model, the heat pump unit has a single cooling mode. In the single cooling mode, the sixth regulating valve and the seventh regulating valve are opened, the plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube in the finned heat exchanger and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

[0069] Figure 7 shows the flow direction of the refrigerant in this single cooling mode, and Figure 12 shows the heat absorption and heat release states of each heat exchange component in this single cooling mode. Combining Figure 7 and Figure 12, it can be seen that in this single cooling mode, the present invention controls the air conditioning water pump to absorb heat from the plate heat exchanger by opening the sixth regulating valve and the seventh regulating valve to produce cold water for indoor cooling, and releases heat to the air through the fins.

[0070] In other words, this utility model can form a complete refrigeration circuit through the control of the above-mentioned regulating valve, which can connect the air conditioning water pump and the plate heat exchanger for heat exchange, so as to produce cold water and provide indoor cooling, thus ensuring the implementation of the single refrigeration mode.

[0071] Please refer to Figures 3, 4, and 12. The heat pump unit in this utility model also has a heating and non-stop defrosting mode, and a heating and heat recovery mode.

[0072] Furthermore, in heating and non-stop defrosting modes, the second, fourth, sixth, and seventh regulating valves are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes and refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat.

[0073] In heating and heat recovery mode, the first regulating valve, the fourth regulating valve, the sixth regulating valve, and the seventh regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

[0074] Figure 3 illustrates the refrigerant flow in heating and non-stop defrosting modes, Figure 4 illustrates the refrigerant flow in heating and heat recovery modes, and Figure 12 illustrates the heat absorption and release states of each heat exchange component in heating and non-stop defrosting modes and heating and heat recovery modes. Combining Figures 3 and 12, it can be seen that when the ambient temperature is relatively low and frost buildup on the finned heat exchanger of the heat pump unit affects heat exchange, this invention can, on the basis of single heating mode, further open the second regulating valve, the fourth regulating valve, and the hot water pump. This allows the hot water in the hot water tank to release heat to the finned heat exchanger through the water heat exchange tubes in the finned heat exchanger, melting the frost on the finned heat exchanger. After releasing heat, the hot water can then absorb heat through the water-cooled heat exchange tubes of the drive plate heat exchanger and finally return to the hot water tank. Under this control, there is no need for reversing control via a four-way valve, enabling uninterrupted heating, improving user comfort, and utilizing the previously ineffective heat generation of the drive plate heat exchanger, thus improving heat utilization efficiency.

[0075] Referring to Figures 4 and 12, in the single heating mode, when defrosting is not required and hot water production is needed, this invention, based on the original single heating mode, activates the first regulating valve, the fourth regulating valve, and the hot water pump. This allows hot water to absorb heat through the water-cooled heat exchange tubes of the drive plate heat exchanger and then flow to the hot water tank, thus producing hot water free of charge, while ensuring good heat dissipation from the drive plate. Under this control, this invention can effectively utilize the ineffective heat dissipation of the drive plate heat exchanger, releasing it as heat to the hot water tank to achieve the hot water production function. This utilizes the originally ineffective heat generation of the drive plate heat exchanger, improving heat utilization efficiency.

[0076] Please refer to Figures 6 and 12. The heat pump unit in this utility model also has a hot water production and non-stop defrosting mode. In the hot water production and non-stop defrosting mode, the second regulating valve, the third regulating valve, and the fifth regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes and refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat.

[0077] Figure 6 illustrates the refrigerant flow direction in both hot water production and non-stop defrosting modes. Figure 12 illustrates the heat absorption and release states of each heat exchange component in these modes. Combining Figures 6 and 12, it can be seen that in the single hot water production mode, when defrosting is required, the second, third, and fifth regulating valves and the hot water pump are additionally activated. This allows hot water from the hot water tank to release heat to the finned heat exchanger through the water heat exchange tubes, melting the frost on the finned heat exchanger. After releasing heat, the hot water then absorbs heat again through the water-cooled heat exchange tubes of the drive plate heat exchanger before returning to the hot water tank. Under this control, there is no need for reversing control via a four-way valve, enabling uninterrupted heating and improving user comfort. Simultaneously, it utilizes the previously ineffective heat generation of the drive plate heat exchanger, improving heat utilization efficiency.

[0078] Please refer to Figures 8 and 12. The heat pump unit in this utility model also has a 9-fold cooling and heat recovery mode. In the cooling and heat recovery mode, the second regulating valve, the fourth regulating valve, the sixth regulating valve, and the seventh regulating valve are opened. The plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube, the refrigerant-water heat exchange tube in the finned heat exchanger, and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

[0079] Figure 8 illustrates the refrigerant flow direction in this cooling and heat recovery mode, and Figure 12 illustrates the heat absorption and release states of each heat exchange component in this mode. Combining Figures 8 and 12, it can be seen that this invention, based on the original single cooling mode, activates the second regulating valve, the fourth regulating valve, and the hot water pump. Hot water passes through the hot water pump, absorbs heat from the plate heat exchanger to produce chilled water for indoor cooling, and releases heat to the finned heat exchanger. The hot water pump heats the water in the hot water tank through the refrigerant-water heat exchange tubes of the finned heat exchanger, then reheats it through the water heat exchange tubes of the drive plate heat exchanger before returning to the hot water tank. In other words, with this setup, this invention can utilize the previously ineffective heat dissipation in the finned heat exchanger and drive plate heat exchanger to produce hot water free of charge.

[0080] Here, the drive plate heat exchanger is located inside the electrical box. When the electrical box is operating, the drive plate generates 5% to 8% of ineffective heat, which is dissipated into the air through the air-cooled heat exchanger. Similarly, when the heat pump unit is cooling, the finned heat exchanger dissipates heat into the air through the outdoor fins, also resulting in some ineffective heat loss. This invention utilizes these two previously ineffective heat portions to produce hot water, thus achieving the rational utilization of the ineffective heat in the finned heat exchanger and the drive plate heat exchanger.

[0081] Based on the above settings, it can be seen that this utility model has at least the following beneficial effects compared with the prior art:

[0082] This utility model features a finned heat exchanger with a refrigerant-air heat exchange tube serving as the first heat exchange section and a refrigerant-water heat exchange tube serving as the second heat exchange section. A drive plate heat exchanger has an air-cooled radiator serving as the first heat exchange section and a water-cooled heat exchange tube serving as the second heat exchange section. Heat exchange can occur between the first and second heat exchange sections, allowing this utility model to utilize the heat loss of both the drive plate heat exchanger and the finned heat exchanger. Furthermore, with the control of a regulating valve, this utility model can use the heat loss of both the drive plate heat exchanger and the finned heat exchanger to produce hot water and provide heating for the air conditioning system. It also utilizes the hot water in the hot water tank and the heat loss of the drive plate heat exchanger for defrosting, improving comfort during defrosting. This achieves comprehensive management and utilization of multiple heat sources in the heat pump unit under three different modes: cooling, heating, and hot water production.

[0083] This utility model also proposes an air conditioning system having the above-mentioned heat pump unit.

[0084] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heat pump unit, characterized in that, It includes a refrigerant flow path, and multiple heat exchange components and regulating valves disposed on the refrigerant flow path for adjusting the operating mode of the heat pump unit; at least one set of heat exchange components consists of a first heat exchange section and a second heat exchange section, and the first heat exchange section and the second heat exchange section can exchange heat.

2. The heat pump unit according to claim 1, characterized in that, The heat exchange assembly includes: a plate heat exchanger, a finned heat exchanger, and a drive plate heat exchanger; wherein, the plate heat exchanger is a refrigerant-water heat exchanger; the finned heat exchanger has a refrigerant-air heat exchange tube serving as a first heat exchange section and a refrigerant-water heat exchange tube serving as a second heat exchange section, and the refrigerant-air heat exchange tube and the refrigerant-water heat exchange tube are connected in series on the same fin; the drive plate heat exchanger has an air-cooled radiator serving as the first heat exchange section and a water-cooled heat exchange tube serving as the second heat exchange section, and both the air-cooled radiator and the water-cooled heat exchange tube are connected to the drive plate for heat exchange.

3. The heat pump unit according to claim 2, characterized in that, The regulating valve includes a first regulating valve connected between the hot water pump and the drive plate heat exchanger; a second regulating valve connected between the hot water pump and the drive plate heat exchanger via the finned heat exchanger; a third regulating valve and a fourth regulating valve connected in series between the hot water tank and the plate heat exchanger; a sixth regulating valve connected between the indoor unit of the air conditioner and the plate heat exchanger; a seventh regulating valve connected between the air conditioner pump and the plate heat exchanger; and a fifth regulating valve connected at one end between the plate heat exchanger and the sixth regulating valve, and at the other end between the hot water tank and the fourth regulating valve. The drive plate heat exchanger is also connected between the third regulating valve and the fourth regulating valve.

4. The heat pump unit according to claim 3, characterized in that, The heat pump unit has a single heating mode, and in the single heating mode, the sixth regulating valve and the seventh regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

5. The heat pump unit according to claim 3, characterized in that, The heat pump unit has a single hot water mode, in which the first regulating valve, the third regulating valve, and the fifth regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

6. The heat pump unit according to claim 3, characterized in that, The heat pump unit has a single cooling mode, and in the single cooling mode, the sixth regulating valve and the seventh regulating valve are opened, the plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube in the finned heat exchanger and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

7. The heat pump unit according to claim 4, characterized in that, The heat pump unit also has a heating and non-stop defrosting mode, and a heating and heat recovery mode. In the heating and non-stop defrosting mode, the second, fourth, sixth, and seventh regulating valves are opened, and the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, while the refrigerant-air and refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat. In the heating and heat recovery mode, the first, fourth, sixth, and seventh regulating valves are opened, and the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, while the refrigerant-air heat exchange tubes in the finned heat exchanger absorb heat.

8. The heat pump unit according to claim 5, characterized in that, The heat pump unit also has a hot water production and non-stop defrosting mode. In the hot water production and non-stop defrosting mode, the second regulating valve, the third regulating valve, and the fifth regulating valve are opened, the water-cooled heat exchange tubes in the plate heat exchanger and the drive plate heat exchanger release heat, and the refrigerant-air heat exchange tubes and the refrigerant-water heat exchange tubes in the finned heat exchanger absorb heat.

9. The heat pump unit according to claim 6, characterized in that, The heat pump unit also has a cooling and heat recovery mode, and in the cooling and heat recovery mode, the second regulating valve, the fourth regulating valve, the sixth regulating valve and the seventh regulating valve are opened, the plate heat exchanger absorbs heat, and the refrigerant-air heat exchange tube, the refrigerant-water heat exchange tube in the finned heat exchanger and the water-cooled heat exchange tube in the drive plate heat exchanger release heat.

10. An air conditioning system, characterized in that, The air conditioning system has a heat pump unit as described in any one of claims 1 to 9.

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