An integrated modular low temperature heat pump air conditioning system

Abstract

An integrated modular low-temperature heat pump air conditioning system, comprising an outdoor unit, an indoor unit, a distribution water collector and a water end, the outdoor unit comprising an enthalpy-increasing compressor, a four-way reversing valve, an outdoor heat exchanger, a fan, an economizer, a gas-liquid separator, a main electronic expansion valve and a secondary electronic expansion valve, the indoor unit comprising a water-side heat exchanger, a coupling water tank and a water pump; the distribution water collector comprising a water distributor and a water collector; one end of the main pipeline of the four-way reversing valve and the economizer respectively communicates with the refrigerant pipeline of the water-side heat exchanger, one end of the water pipeline of the water-side heat exchanger communicates with the water distributor, the coupling water tank communicates with the other end of the water pipeline and the water collector; the water end communicates with the water distributor and the water collector. The arrangement of the indoor unit reduces the weight and volume of the outdoor unit, and the outdoor unit is convenient to install; the indoor unit is arranged indoors, effectively preventing the water-side heat exchanger from icing and effectively protecting the water-side heat exchanger.

Description

Technical Field

[0001] This utility model relates to an air source heat pump system, specifically an integrated modular low-temperature heat pump air conditioning system. Background Technology

[0002] Existing low-temperature heating heat pump air conditioning systems utilize national AC power and air source heat pump systems. Following the Carnot cycle principle, a compressor compresses water to obtain a high-temperature, high-pressure gaseous heat source. A circulating water pump exchanges heat with room-temperature water in a buffer tank, raising the tank's water temperature to produce high-temperature hot water. A secondary circulation system then pumps this hot water to indoor underfloor heating pipes or radiators for further heat exchange, raising the indoor temperature. The main problems are as follows: 1. The main unit is an integrated unit, large in size and heavy in weight. Limited space in commercial high-rise buildings makes installation impossible, resulting in difficult and expensive high-altitude installation and maintenance. 2. The numerous components required for the water system (such as buffer tanks, pumps, expansion tanks, valves, pressure gauges, etc.) increase installation difficulty, time, and cost. 3. Some water lines are installed outdoors; in the event of a power outage, low ambient temperatures can easily cause pipes to freeze and crack. 4. Underfloor heating pipes cannot be used for cooling, failing to address condensation issues and potentially damaging the floor. Only ceiling-mounted fan coil units can be used for cooling, resulting in high installation costs. Utility Model Content

[0003] The purpose of this utility model is to provide an integrated modular low-temperature heat pump air conditioning system, which features a lightweight outdoor unit that is easy to install and prevents the water-side heat exchanger from freezing.

[0004] This utility model is implemented as follows: an integrated modular low-temperature heat pump air conditioning system, characterized in that it includes an outdoor unit, an indoor unit, a water manifold, and water terminals.

[0005] The outdoor unit includes an enthalpy-increasing compressor, a four-way reversing valve, an outdoor heat exchanger, a fan, an economizer, a gas-liquid separator, a main electronic expansion valve, and a secondary electronic expansion valve.

[0006] The indoor unit includes a water-side heat exchanger, a coupling water tank, and a water pump;

[0007] A water distribution manifold includes a water distributor and a water collector;

[0008] One end of the main pipe of the four-way reversing valve and the economizer is connected to the refrigerant pipe of the water-side heat exchanger, one end of the water pipe of the water-side heat exchanger is connected to the water distributor, and the coupling water tank is connected to the other end of the water pipe and the water collector; the water terminal is connected to the water distributor and the water collector.

[0009] The integrated modular low-temperature heat pump air conditioning system is characterized in that: the exhaust port of the enthalpy-increasing compressor is connected to the D end of the four-way reversing valve; the C end of the four-way reversing valve is connected to the first pipeline; the E end of the four-way reversing valve, the outdoor heat exchanger, the main electronic expansion valve, and one end of the main pipeline of the economizer are connected; one end of the secondary pipeline of the economizer, the secondary electronic expansion valve, the pipeline between the main pipeline of the economizer and the main electronic expansion valve are connected; the other end of the secondary pipeline is connected to the enthalpy-increasing gas port of the enthalpy-increasing compressor; the S end of the four-way reversing valve, the gas-liquid separator, and the return gas port of the enthalpy-increasing compressor are connected; and the second pipeline is connected to the other end of the main pipeline of the economizer.

[0010] The integrated modular low-temperature heat pump air conditioning system is characterized by the following: it also includes a bypass capillary tube and a one-way valve, which are connected in series and then in parallel with the main electronic expansion valve.

[0011] The integrated modular low-temperature heat pump air conditioning system is characterized by the fact that it also includes a balance tank, which is connected to a second pipeline.

[0012] The integrated modular low-temperature heat pump air conditioning system is characterized in that: the water outlet of the water-side heat exchanger is connected to the water distributor; the water collector, water terminal, coupling water tank, water pump and water pipe inlet are connected in sequence.

[0013] The integrated modular low-temperature heat pump air conditioning system is characterized in that: the water terminal includes underfloor heating pipes and / or radiators, and the underfloor heating pipes and radiators are respectively connected to a manifold and a collector.

[0014] The integrated modular low-temperature heat pump air conditioning system is characterized by the fact that it also includes a dehumidifier and temperature controller, which is connected to a water distributor and a water collector.

[0015] This utility model discloses an integrated modular low-temperature heat pump air conditioning system. The indoor unit reduces the weight and size of the outdoor unit, and the outdoor unit is easy to install. The indoor unit is located indoors, which effectively prevents the water-side heat exchanger from freezing and effectively protects the water-side heat exchanger. Attached Figure Description

[0016] Figure 1 This is the front view of this utility model.

[0017] Figure 2 This is the front view of the outdoor unit of this utility model.

[0018] Figure 3 This is the front view of the indoor unit of this utility model.

[0019] Figure 4 This is the front view of the interior layout of this utility model. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 As shown, an integrated modular low-temperature heat pump air conditioning system includes an outdoor unit 1, an indoor unit 2, a manifold 3, and water terminals 4.

[0023] Outdoor unit 1 includes an enthalpy-increasing compressor 11, a four-way reversing valve 12, an outdoor heat exchanger 13, a fan, an economizer 14, a gas-liquid separator 15, a main electronic expansion valve 161, and an auxiliary electronic expansion valve 162.

[0024] Indoor unit 2 includes a water-side heat exchanger 21, a coupling water tank 22, and a water pump 23;

[0025] The coupling water tank 22 has the following functions: (I) Avoiding frequent start-stop of the main unit. When the terminal (such as underfloor heating pipes, fan coil units) is briefly shut down or the demand is very low, the circulating water volume of the main unit will decrease sharply, causing the main unit to quickly reach the set temperature and shut down. However, frequent start-stop of the compressor will greatly shorten its lifespan and increase energy consumption. The coupling water tank increases the system water capacity. When the terminal is shut down, the main unit can continue to exchange heat with the water in the coupling water tank, storing heat in the water, thereby extending the operating time of the main unit and avoiding short-cycle cycles. The energy required to start the main unit once is much greater than the energy consumption for continuous operation for a period of time. (II) Ensuring efficient and stable operation of the system. The main unit (especially the air source heat pump) has an optimal operating flow range. Too low a flow rate will lead to a decrease in heat exchange efficiency and may even cause low-pressure alarms, freezing and cracking problems. The coupling water tank provides a stable hydraulic environment. The system's circulating pump can prioritize ensuring that the water flow rate on the main unit side is stable within the optimal range, while the changes in demand on the user side are "buffered" by the coupling water tank, ensuring that the main unit always operates under efficient conditions. (III) Effective defrosting enhances heating comfort. Air source heat pumps require regular defrosting during winter heating. During defrosting, the main unit absorbs heat from the indoor side. If the system's water capacity is small, the water temperature will drop rapidly, resulting in cold air blowing into the room and poor comfort. Systems with coupling water tanks store a large amount of hot water. During the few minutes of defrosting, this hot water can continue to supply heat to the room, avoiding drastic fluctuations in indoor temperature and greatly improving comfort.

[0026] The water distribution manifold 3 includes a water distributor 31 and a water collector 32;

[0027] One end of the main pipe of the four-way reversing valve 12 and the economizer 14 is connected to the refrigerant pipe of the water-side heat exchanger 21, one end of the water pipe of the water-side heat exchanger 21 is connected to the water distributor 31, and the coupling water tank 22 is connected to the other end of the water pipe of the water-side heat exchanger 21 and the water collector; the water terminal 4 is connected to the water distributor 31 and the water collector.

[0028] When this utility model is used, the outdoor unit 1 is lightweight and small in size, making it easy to install, especially for high-rise buildings; the indoor unit is installed inside the room, effectively preventing freezing and damage in low or ultra-low temperature environments; the water distribution manifold 3 allows for use in multiple rooms.

[0029] like Figure 2As shown, the exhaust port of the enthalpy-increasing compressor 11 is connected to the D end of the four-way reversing valve 12, the C end of the four-way reversing valve 12 is connected to the first pipeline 171, the E end of the four-way reversing valve 12, the outdoor heat exchanger 13, the main electronic expansion valve 161, and one end of the main pipeline of the economizer 14 are connected; one end of the auxiliary pipeline of the economizer 14, the auxiliary electronic expansion valve 162, the pipeline between the main pipeline of the economizer 14 and the main electronic expansion valve 161 are connected, that is, the pipeline between the auxiliary electronic expansion valve 162, the main electronic expansion valve 161, and the economizer is connected; the other end of the auxiliary pipeline is connected to the enthalpy-increasing gas port of the enthalpy-increasing compressor 11; the S end of the four-way reversing valve 12, the gas-liquid separator 15, and the return gas port of the enthalpy-increasing compressor 11 are connected; the second pipeline is connected to the other end of the main pipeline of the economizer 14.

[0030] As a further improvement to this utility model, it also includes a bypass capillary tube 181 and a one-way valve 182, which are connected in series and then in parallel with the main electronic expansion valve 161. With this design, the bypass capillary tube 181 and the one-way valve 182 are used for cooling when the ambient temperature is too high; the main electronic expansion valve 161 is suitable for heating when the ambient temperature is too low.

[0031] As a further improvement of this utility model, it also includes a balance tank 19, which is connected to the second pipeline 172.

[0032] like Figure 3 As shown, the outlet end of the water pipe of the water-side heat exchanger 21 is connected to the water distributor 31; the water collector 32, the water terminal 4, the coupling water tank 22, the water pump 23 and the return end of the water pipe are connected in sequence.

[0033] like Figure 4 As shown, the water terminal 4 includes a floor heating pipe 41 and / or a radiator 42, which are respectively connected to a water distributor 31 and a water collector 32.

[0034] As a further improvement of this utility model, it also includes a dehumidifier and temperature controller 43, which is connected to the water distributor 31 and the water collector 32. The dehumidifier and temperature controller 43 has been disclosed in Chinese Patent 202110943456.1, entitled "A Heat Pump Air Conditioner with Dehumidification Function".

[0035] The dehumidifier and temperature controller 43 can be installed on the floor or at the bottom of the wall, seamlessly integrating with the space. The system design is perfectly compatible with floor cooling systems, effectively supplementing indoor cooling capacity.

[0036] In summer, the unit combines cooling and dehumidification with a fresh air and sterilization filtration system to maintain constant indoor temperature, humidity, oxygen, cleanliness, and quietness, truly achieving "five constants."

[0037] Heating mode:

[0038] (a) The exhaust port of the enthalpy-increasing compressor 11, the DC end of the four-way reversing valve, the first pipeline 171, the refrigerant pipeline of the water-side heat exchanger 21, the second pipeline 172 and the main pipeline of the economizer are connected in sequence; (1) The refrigerant enters the enthalpy-increasing compressor 11 through the return gas pipe of the enthalpy-increasing compressor 11 via the main electronic expansion valve 161, the outdoor heat exchanger 13, the ES end of the four-way reversing valve, the gas-liquid separator 15; (2) The refrigerant is connected to the enthalpy-increasing port of the enthalpy-increasing compressor via the refrigerant pipeline of the water-side heat exchanger 21, the auxiliary electronic expansion valve 162, the auxiliary pipeline of the economizer;

[0039] (ii) At the same time, the water outlet of the water circuit of the water-side heat exchanger 21, the water distributor 31, the water terminal 4, the water collector 32, the coupling water tank 22, and the water pump 23 enter the water return end of the water circuit of the water-side heat exchanger.

[0040] Cooling mode:

[0041] (a) The exhaust port of the enthalpy-increasing compressor 11, the CE end of the four-way reversing valve 12, the outdoor heat exchanger 13, the one-way valve 182, the bypass capillary tube 181, the main pipeline of the economizer 14, the second pipeline 172, the refrigerant pipeline of the water-side heat exchanger 21, the second pipeline 171, the CS end of the four-way reversing valve 12, and the gas-liquid separator 15 enter the enthalpy-increasing compressor 11 through the return gas pipeline of the enthalpy-increasing compressor 11;

[0042] (ii) At the same time, the water outlet of the water pipe of the water-side heat exchanger 21, the water distributor 31, the water terminal 4, the water collector 32, the coupling water tank 22, and the water pump 23 enter the water return end of the water pipe of the water-side heat exchanger.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An integrated modular low-temperature heat pump air conditioning system, characterized in that: Includes outdoor unit, indoor unit, manifold, and water terminals. The outdoor unit includes an enthalpy-increasing compressor, a four-way reversing valve, an outdoor heat exchanger, a fan, an economizer, a gas-liquid separator, a main electronic expansion valve, and a secondary electronic expansion valve. The indoor unit includes a water-side heat exchanger, a coupling water tank, and a water pump; A water distribution manifold includes a water distributor and a water collector; One end of the main pipe of the four-way reversing valve and the economizer is connected to the refrigerant pipe of the water-side heat exchanger, one end of the water pipe of the water-side heat exchanger is connected to the water distributor, and the coupling water tank is connected to the other end of the water pipe and the water collector; the water terminal is connected to the water distributor and the water collector.

2. The integrated modular low-temperature heat pump air conditioning system according to claim 1, characterized in that: The exhaust port of the enthalpy-increasing compressor is connected to the D end of the four-way reversing valve. The C end of the four-way reversing valve is connected to the first pipeline. The E end of the four-way reversing valve, the outdoor heat exchanger, the main electronic expansion valve, and one end of the main pipeline of the economizer are connected. One end of the auxiliary pipeline of the economizer, the auxiliary electronic expansion valve, the pipeline between the main pipeline of the economizer and the main electronic expansion valve are connected. The other end of the auxiliary pipeline is connected to the enthalpy-increasing gas port of the enthalpy-increasing compressor. The S end of the four-way reversing valve, the gas-liquid separator, and the return gas port of the enthalpy-increasing compressor are connected. The second pipeline is connected to the other end of the main pipeline of the economizer.

3. The integrated modular low-temperature heat pump air conditioning system according to claim 2, characterized in that: It also includes a bypass capillary and a one-way valve, which are connected in series and then in parallel with the main electronic expansion valve.

4. The integrated modular low-temperature heat pump air conditioning system according to claim 2, characterized in that: It also includes a balance tank, which is connected to a second pipeline.

5. The integrated modular low-temperature heat pump air conditioning system according to claim 1, characterized in that: The outlet end of the water pipe of the water-side heat exchanger is connected to the water distributor; the water collector, water terminal, coupling water tank, water pump and the return end of the water pipe are connected in sequence.

6. An integrated modular low-temperature heat pump air conditioning system according to claim 1, 2, 3, 4 or 5, characterized in that: The water supply terminal includes underfloor heating pipes and / or radiators, which are connected to a manifold and a collector, respectively.

7. The integrated modular low-temperature heat pump air conditioning system according to claim 6, characterized in that: It also includes a dehumidifier and temperature controller, which is connected to a water distributor and a water collector.

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