Air source heat pump system

Abstract

The utility model discloses an air source heat pump system, comprising a heat pump mechanism and an inlet and outlet water component; the heat exchange end plate of the inlet and outlet water component is arranged at the heat exchange end of the heat pump mechanism; the heat pump mechanism comprises a heat pump component, a water-side heat exchange component and an air-side heat exchange component; the heat pump component comprises a compressor, a four-way valve, a heat exchanger and an electronic expansion valve; one end of the compressor is connected to one end of the water-side heat exchange component through the four-way valve; the other end of the water-side heat exchange component is connected to one end of the electronic expansion valve through the heat exchanger and a first one-way valve; the other end of the electronic expansion valve is connected to one end of the air-side heat exchange component; the other end of the air-side heat exchange component is connected to the compressor through the four-way valve and the heat exchanger in sequence; the utility model realizes the purpose of increasing the heating capacity by adding a low-cost additional heat exchanger, thereby achieving the purpose of both increasing the heating capacity and improving the system reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an air source heat pump system. Background Art

[0002] An air source heat pump is an energy-saving device that uses high-level energy to make heat flow from a low-level heat source to a high-level heat source. It is a form of heat pump. As the name implies, a heat pump is like a pump, which can convert low-level heat energy that cannot be directly used (such as heat contained in air, soil, and water) into high-level heat energy that can be used, thereby achieving the purpose of saving some high-level energy (such as coal, gas, oil, electricity, etc.). A heat pump is an energy-saving device that uses high-level energy to make heat flow from a low-level heat source to a high-level heat source. Air, as a low-level heat source for heat pumps, is inexhaustible and can be obtained everywhere. Moreover, the installation and use of air source heat pumps are relatively convenient. At present, the heat exchange rate of heat pump products at low ambient temperature is low, resulting in low energy efficiency, which brings troubles to the user's comfort, or an air replenishment compressor is added, but it leads to increased costs; therefore, it is necessary to provide an air source heat pump system to solve the technical problems existing in the prior art. Utility Model Content

[0003] The utility model aims to provide an air source heat pump system, which can increase the heat exchange capacity and product reliability by adding a low-cost heat exchanger, and can widely meet the hot water needs of domestic, commercial or industrial applications.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: an air source heat pump system, comprising a heat pump mechanism and an inlet and outlet water component; the heat exchange end plate of the inlet and outlet water component is arranged at the heat exchange end of the heat pump mechanism; wherein: the heat pump mechanism comprises a heat pump component, a water-side heat exchange component and an air-side heat exchange component; the heat pump component comprises a compressor, a four-way valve, a heat exchanger and an electronic expansion valve; one end of the compressor is connected to one end of the water-side heat exchange component through the four-way valve; the other end of the water-side heat exchange component is connected to one end of the electronic expansion valve through the heat exchanger and a first one-way valve; the other end of the electronic expansion valve is connected to one end of the air-side heat exchange component; the other end of the air-side heat exchange component is connected to the compressor through the four-way valve and the heat exchanger in sequence; the inlet and outlet water component is connected to the water-side heat exchange component.

[0005] As a further improvement of the technical solution of the utility model, one end of the air-side heat exchange component is connected to the water-side heat exchange component through the electronic expansion valve and the second one-way valve in sequence.

[0006] As a further improvement of the technical solution of the utility model, the air-side heat exchange assembly includes a fin heat exchanger, a fan and an air-side coil temperature sensor; one end of the fin heat exchanger is connected to the four-way valve; the other end of the fin heat exchanger is connected to the electronic expansion valve; the fan is arranged on one side of the fin heat exchanger; the air-side coil temperature sensor is installed on the connecting pipe between the fin heat exchanger and the four-way valve.

[0007] As a further improvement of the technical solution of the utility model, the water-side heat exchange component includes a plate heat exchanger and a water-side coil temperature sensor; one end of the plate heat exchanger is connected to the four-way valve; the other end of the plate heat exchanger is connected to the heat exchanger; the water-side coil temperature sensor is installed on the connecting pipe between the plate heat exchanger and the heat exchanger.

[0008] As a further improvement of the technical solution of the utility model, the water inlet and outlet components include a water inlet pipe, a water outlet pipe, a heat exchange tube and a water pump; the water inlet pipe is connected to one end of the heat exchange tube through the water pump; the other end of the heat exchange tube is connected to the water outlet pipe; the heat exchange tube coil is arranged on the plate heat exchanger.

[0009] As a further improvement of the technical solution of the utility model, the water inlet and outlet components also include an inlet water temperature sensor, a safety valve, a water flow switch, an automatic exhaust valve and an outlet water temperature sensor; the inlet water temperature sensor, the safety valve and the water flow switch are installed on the water inlet pipe in sequence along the water inlet direction; the automatic exhaust valve and the outlet water temperature sensor are installed on the outlet pipe in sequence along the water outlet direction.

[0010] As a further improvement of the technical solution of the utility model, a filter is provided on the connecting pipe between the electronic expansion valve and the fin heat exchanger.

[0011] As a further improvement of the technical solution of the utility model, a return air temperature sensor and a low pressure sensor are respectively provided on the connecting pipe between the compressor and the heat exchanger.

[0012] As a further improvement of the technical solution of the utility model, an exhaust temperature sensor and a high-pressure pressure sensor are respectively provided on the connecting pipeline between the compressor and the four-way valve.

[0013] In summary, the utility model has the following beneficial effects:

[0014] The utility model increases the heat exchange capacity, especially the heat exchange capacity in low temperature environment, by adding a heat exchanger. The utility model adopts a double-tube inlet and double-tube outlet structure, wherein the inlet of the first tube is connected to the outlet of the water-side heat exchange component, and then to the electronic expansion valve (throttling component) after heat exchange; in addition, the inlet of the second tube is connected to the outlet of the air-side heat exchange component, and then to the compressor return port after heat exchange. The overall working principle is that through the heat exchange between the condensation side and the evaporation side, the condensation end absorbs heat to achieve the purpose of supercooling, and the evaporation side absorbs heat to increase the suction temperature, avoid liquid return, and cause the problem of compressor liquid hammer, play a protective role, and at the same time increase the heat exchange capacity. The utility model achieves the purpose of increasing the heating capacity by adding a low-cost additional heat exchanger (through the mutual exchange of heat between the condensation side refrigerant and the suction side refrigerant, supercooling and increasing the suction pressure are achieved), thereby achieving both the purpose of increasing the heating capacity and the reliability of the system, and achieving the purpose of protecting the system, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 The figure is a schematic diagram of the structure of an embodiment of an air source heat pump system.

[0017] The figure marks in the drawings of the specification include: 1-heat pump mechanism; 2-inlet and outlet water components; 3-return air temperature sensor; 4-low pressure sensor; 5-exhaust temperature sensor; 6-high pressure sensor; 11-heat pump assembly; 12-water side heat exchange assembly; 13-air side heat exchange assembly; 21-water inlet pipe; 22-water outlet pipe; 23-heat exchange pipe; 24-water pump; 25-water inlet temperature sensor; 26-safety valve; 27-water flow switch; 28-automatic exhaust valve; 29-water outlet temperature sensor; 111-compressor; 112-four-way valve; 113-heat exchanger; 114-electronic expansion valve; 115-first one-way valve; 116-second one-way valve; 117-filter; 121-plate heat exchanger; 122-water side coil temperature sensor; 131-fin heat exchanger; 132-fan; 133-air side coil temperature sensor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, upper end, lower end, top, bottom...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0020] In the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, "connection" 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, 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.

[0021] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features; in addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0022] The following is combined with Figure 1 The utility model is described in further detail.

[0023] Reference Figure 1, an air source heat pump system, comprising a heat pump mechanism 1 and an inlet and outlet water component 2; the heat exchange end plate of the inlet and outlet water component 2 is arranged at the heat exchange end of the heat pump mechanism 1; wherein: the heat pump mechanism 1 comprises a heat pump component 11, a water side heat exchange component 12 and an air side heat exchange component 13; the heat pump component 11 comprises a compressor 111, a four-way valve 112, a heat exchanger 113 and an electronic expansion valve 114; one end of the compressor 111 is connected to the water side heat exchange component through the four-way valve 112 12; the other end of the water side heat exchange component 12 is connected to one end of the electronic expansion valve 114 through the heat exchanger 113 and the first one-way valve 115; the other end of the electronic expansion valve 114 is connected to one end of the air side heat exchange component 13; the other end of the air side heat exchange component 13 is connected to the compressor 111 through the four-way valve 112 and the heat exchanger 113 in sequence; the water inlet and outlet components 2 are connected to the water side heat exchange component 12. The utility model increases the heat exchange amount by adding a heat exchanger 113, especially the heat exchange amount in a low temperature environment. The utility model adopts a double-tube inlet and double-tube outlet structure, in which the inlet of the first tube is connected to the outlet of the water side heat exchange component 12, and then to the electronic expansion valve 114 (throttling component) after heat exchange; in addition, the inlet of the second tube is connected to the outlet of the air side heat exchange component 13, and reaches the return air port of the compressor 111 after heat exchange. The general working principle is that through the heat exchange between the condensing side and the evaporating side, the condensing end absorbs heat to achieve the purpose of supercooling, and the evaporating side absorbs heat to increase the suction temperature, avoid liquid return, and cause the problem of liquid hammer in the compressor 111, which plays a protective role and can also increase the heat exchange. The utility model achieves the purpose of increasing the heating capacity by adding a low-cost additional heat exchanger 113 (through the heat exchange between the refrigerant on the condensing side and the refrigerant on the suction side, supercooling and increasing the suction pressure are achieved), thereby achieving the purpose of increasing the heating capacity while improving the reliability of the system and achieving the purpose of protecting the system.

[0024] Specifically, in this embodiment, one end of the air-side heat exchange component 13 is connected to the water-side heat exchange component 12 through the electronic expansion valve 114 and the second one-way valve 116. It should be noted that the second one-way valve 116 is provided to prevent the high-pressure medium-temperature refrigerant from passing through the heat exchanger 113 when the heat pump system is cooling, so as to ensure the normal operation of the equipment.

[0025] Specifically, in the present embodiment, the air-side heat exchange assembly 13 includes a fin heat exchanger 131, a fan 132 and an air-side coil temperature sensor 133; one end of the fin heat exchanger 131 is connected to the four-way valve 112; the other end of the fin heat exchanger 131 is connected to the electronic expansion valve 114; the fan 132 is arranged on one side of the fin heat exchanger 131; the air-side coil temperature sensor 133 is installed on the connecting pipe between the fin heat exchanger 131 and the four-way valve 112. It should be noted that the fan 132 is used to generate wind power to realize the air cooling function of the fin heat exchanger 131. The air-side coil temperature sensor 133 is used to monitor the temperature change of the fin heat exchanger 131 in real time.

[0026] Specifically, in this embodiment, the water-side heat exchange assembly 12 includes a plate heat exchanger 121 and a water-side coil temperature sensor 122; one end of the plate heat exchanger 121 is connected to the four-way valve 112; the other end of the plate heat exchanger 121 is connected to the heat exchanger 113; the water-side coil temperature sensor 122 is installed on the connecting pipe between the plate heat exchanger 121 and the heat exchanger 113. It should be noted that the water-side coil temperature sensor 122 is used to monitor the temperature change of the plate heat exchanger 121 in real time.

[0027] Specifically, in the present embodiment, the water inlet and outlet assembly 2 includes a water inlet pipe 21, a water outlet pipe 22, a heat exchange pipe 23 and a water pump 24; the water inlet pipe 21 is connected to one end of the heat exchange pipe 23 through the water pump 24; the other end of the heat exchange pipe 23 is connected to the water outlet pipe 22; the heat exchange pipe 23 is coiled on the plate heat exchanger 121. It should be noted that the water inlet pipe 21 is connected to a water source, and the normal temperature water is delivered to the heat exchange pipe 23 through the water pump 24. The normal temperature water exchanges heat with the plate heat exchanger 121 in the heat exchange pipe 23 to increase the temperature. When the normal temperature water is heated to the set temperature, it is delivered to the user through the water outlet pipe 22. The utility model can be widely used in the hot water needs of life, commercial or industrial applications.

[0028] Specifically, in this embodiment, the water inlet and outlet assembly 2 further includes a water inlet temperature sensor 25, a safety valve 26, a water flow switch 27, an automatic air exhaust valve 28 and a water outlet temperature sensor; the water inlet temperature sensor 25, the safety valve 26 and the water flow switch 27 are sequentially installed on the water inlet pipe 21 along the water inlet direction; the automatic air exhaust valve 28 and the water outlet temperature sensor 29 are sequentially installed on the water outlet pipe 22 along the water outlet direction. It should be noted that the water inlet temperature sensor 25 is used to detect the water inlet temperature in the water inlet pipe 21, the automatic air exhaust valve 28 is used to exhaust the gas generated by the hot water; and the water outlet temperature sensor 29 is used to detect the water outlet temperature of the water outlet pipe 22.

[0029] Specifically, in this embodiment, a filter 117 is provided on the connecting pipe between the electronic expansion valve 114 and the fin heat exchanger 131 to play a filtering role.

[0030] Specifically, in this embodiment, a return air temperature sensor 3 and a low pressure sensor 4 are respectively provided on the connecting pipe between the compressor 111 and the heat exchanger 113. It should be noted that the return air temperature sensor 3 is used to detect the return air temperature of the compressor 111; the low pressure sensor 4 is used to detect the pressure value of the low pressure end of the compressor 111.

[0031] Specifically, in this embodiment, an exhaust temperature sensor 5 and a high-pressure pressure sensor 6 are respectively provided on the connecting pipe between the compressor 111 and the four-way valve 112. It should be noted that the exhaust temperature sensor 5 is used to detect the exhaust temperature of the compressor 111; the high-pressure pressure sensor 6 is used to detect the pressure value of the high-pressure end of the compressor 111.

[0032] The working principle of this utility model:

[0033] Heating: This system achieves the purpose of increasing the heating capacity by adding a heat exchanger 113. During heating, the refrigerant is compressed by the compressor 111 and comes out from the exhaust port through the four-way valve 112, and then goes to the plate heat exchanger 121 to exchange heat with the inlet and outlet water components 2 for condensation, and then passes through the heat exchanger 113 to exchange heat with the low-temperature refrigerant on the return air side, which further achieves the effect of supercooling the refrigerant, and then passes through the electronic expansion valve 114 (throttling component) for throttling, and then goes to the fin heat exchanger 131 for heat exchange, and after evaporation, passes through the heat exchanger 113 to exchange heat with the condensed refrigerant, further increasing the refrigerant pressure and temperature on the suction side, thereby increasing the heat exchange capacity and improving the reliability of the system.

[0034] Refrigeration: During refrigeration, the refrigerant is compressed by the compressor 111, comes out from the exhaust port, passes through the four-way valve 112, and then goes to the fin heat exchanger 131 to exchange heat with the air and condense, and then passes through the electronic expansion valve 114 for throttling. After throttling, it enters the plate heat exchanger 121 and exchanges heat with the inlet and outlet water components 2 for evaporation (at this time, the high-pressure and medium-temperature refrigerant does not pass through the heat exchanger 113, and is stopped by the second one-way valve 116), returns to the heat exchanger 113 (at this time it is equivalent to a gas-liquid separator), and then returns to the suction port of the compressor 111 for compression, and repeats the cycle.

[0035] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. An air source heat pump system, comprising a heat pump mechanism and an inlet and outlet water assembly; the heat exchange end plate of the inlet and outlet water assembly is arranged at the heat exchange end of the heat pump mechanism; characterized in that: The heat pump mechanism includes a heat pump component, a water-side heat exchange component and an air-side heat exchange component; the heat pump component includes a compressor, a four-way valve, a heat exchanger and an electronic expansion valve; one end of the compressor is connected to one end of the water-side heat exchange component through the four-way valve; the other end of the water-side heat exchange component is connected to one end of the electronic expansion valve through the heat exchanger and the first one-way valve; the other end of the electronic expansion valve is connected to one end of the air-side heat exchange component; the other end of the air-side heat exchange component is connected to the compressor through the four-way valve and the heat exchanger in sequence; the inlet and outlet water components are connected to the water-side heat exchange component.

2. An air source heat pump system according to claim 1, characterized in that: One end of the air-side heat exchange component is connected to the water-side heat exchange component through the electronic expansion valve and the second one-way valve in sequence.

3. The air source heat pump system according to claim 1, characterized in that: The air-side heat exchange component includes a fin heat exchanger, a fan and an air-side coil temperature sensor; one end of the fin heat exchanger is connected to the four-way valve; the other end of the fin heat exchanger is connected to the electronic expansion valve; the fan is arranged on one side of the fin heat exchanger; the air-side coil temperature sensor is installed on the connecting pipe between the fin heat exchanger and the four-way valve.

4. The air source heat pump system according to claim 1, characterized in that: The water-side heat exchange component includes a plate heat exchanger and a water-side coil temperature sensor; one end of the plate heat exchanger is connected to the four-way valve; the other end of the plate heat exchanger is connected to the heat exchanger; the water-side coil temperature sensor is installed on the connecting pipe between the plate heat exchanger and the heat exchanger.

5. An air source heat pump system according to claim 4, characterized in that: The water inlet and outlet assembly includes an inlet pipe, an outlet pipe, a heat exchange pipe and a water pump; the inlet pipe is connected to one end of the heat exchange pipe through the water pump; the other end of the heat exchange pipe is connected to the outlet pipe; the heat exchange pipe coil is arranged on the plate heat exchanger.

6. An air source heat pump system according to claim 5, characterized in that: The water inlet and outlet components also include an inlet water temperature sensor, a safety valve, a water flow switch, an automatic exhaust valve and an outlet water temperature sensor; the inlet water temperature sensor, the safety valve and the water flow switch are installed on the inlet pipe in sequence along the water inlet direction; the automatic exhaust valve and the outlet water temperature sensor are installed on the outlet pipe in sequence along the water outlet direction.

7. The air source heat pump system according to claim 3, characterized in that: A filter is provided on the connecting pipe between the electronic expansion valve and the fin heat exchanger.

8. The air source heat pump system according to claim 1, characterized in that: A return air temperature sensor and a low pressure sensor are respectively provided on the connecting pipe between the compressor and the heat exchanger.

9. The air source heat pump system according to claim 1, characterized in that: An exhaust temperature sensor and a high pressure sensor are respectively arranged on the connecting pipeline between the compressor and the four-way valve.

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