CN214094769U

CN214094769U - Air-cooled heat pump unit system

Info

Publication number: CN214094769U
Application number: CN202023201465.3U
Authority: CN
Inventors: 董娜娜
Original assignee: Suzhou Sujing Bush Refrigeration Equipment Co ltd
Current assignee: Suzhou Sujing Bush Refrigeration Equipment Co ltd
Priority date: 2020-12-26
Filing date: 2020-12-26
Publication date: 2021-08-31
Anticipated expiration: 2030-12-26

Abstract

The utility model discloses an air-cooled heat pump unit system, which comprises a first circulation loop with a refrigeration function and a second circulation loop with a heating function, wherein the first circulation loop is formed by sequentially circulating and communicating a compressor, a first passage of a four-way reversing valve, a first heat exchanger for exchanging heat with ambient air, a second heat exchanger for exchanging heat by adopting underground water, an electronic expansion valve, a third heat exchanger for exchanging heat with user-side water, a second passage of the four-way reversing valve and a gas-liquid separator; the second circulation loop is formed by sequentially and circularly communicating a compressor, a third passage of the four-way reversing valve, a third heat exchanger, an electronic expansion valve, a second heat exchanger, a first heat exchanger, a fourth passage of the four-way reversing valve and a gas-liquid separator; the system greatly reduces the influence on the refrigerating and heating capacity of the unit when the ambient temperature at the source side changes greatly, and ensures that the unit has longer service life and excellent energy efficiency when having better refrigerating and heating capacity.

Description

Air-cooled heat pump unit system

Technical Field

The utility model belongs to the technical field of warm logical air conditioner, concretely relates to air-cooled heat pump unit system.

Background

The user use side of the existing air-cooled heat pump unit is a shell-and-tube heat exchanger, and the source side is an air-cooled finned heat exchanger. The ordinary air-cooled heat pump unit has the refrigeration environment range of 21-43 ℃ and the heating environment range of-7-21 ℃ according to the national standard GB/T18430.1-2007. It can be seen that the ambient temperature range changes greatly, and the ambient temperature change on the source side has a great influence on the capacity and energy efficiency of the unit. The most common problems of the existing air-cooled heat pump units are mainly as follows: when refrigerating, if the outdoor environment temperature is higher than 35 ℃, the condensing pressure of the finned heat exchanger used as a condenser is continuously increased, the power current is increased, the energy efficiency is reduced, and the service life of the scroll compressor of the moving component is reduced due to long-time operation; for another example, when heating, if the ambient temperature is lower than 7 ℃, the fin evaporator on the source side is affected by the ambient temperature, the evaporation temperature is lower and lower, the capacity of the unit is worse and worse, and the heating capacity at-7 ℃ is reduced to about 60% of the original heating capacity.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough among the prior art, providing a modified air cooled heat pump set system, this system has greatly reduced the influence of source side ambient temperature change to the refrigeration heating ability of unit when great, has guaranteed that the unit has longer life and excellent efficiency concurrently when having better refrigeration heating ability.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

an air-cooled heat pump unit system comprises a compressor, a four-way reversing valve, a first heat exchanger for exchanging heat with ambient air, a second heat exchanger for exchanging heat with underground water, an electronic expansion valve, a third heat exchanger for exchanging heat with water used at a user side, and a gas-liquid separator; the air-cooled heat pump unit system comprises a first circulation loop with a refrigeration function and a second circulation loop with a heating function, and the four-way reversing valve comprises a first passage, a second passage, a third passage and a fourth passage;

the compressor, the first passage of the four-way reversing valve, the first heat exchanger, the second heat exchanger, the electronic expansion valve, the third heat exchanger, the second passage of the four-way reversing valve and the gas-liquid separator are sequentially communicated in a circulating manner to form the first circulating loop;

the compressor, the third passage of the four-way reversing valve, the third heat exchanger, the electronic expansion valve, the second heat exchanger, the first heat exchanger, the fourth passage of the four-way reversing valve and the gas-liquid separator are sequentially communicated in a circulating mode to form the second circulating loop.

According to some preferred aspects of the present invention, the compressor is a scroll compressor.

According to some preferred aspects of the utility model, first heat exchanger includes the fin type heat exchanger, is located fin type heat exchanger one side and be used for to the fin type heat exchanger blows the axial fan of environment wind, the fin type heat exchanger respectively with the four-way reversing valve second heat exchanger intercommunication.

According to some preferred aspects of the invention, the second heat exchanger is a square shell heat exchanger.

According to some preferred aspects of the invention, the third heat exchanger is a shell and tube heat exchanger.

According to some preferred aspects of the utility model, the refrigerant that air cooled heat pump set system adopted is freon.

Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the utility model discloses innovatively in carrying out the first heat exchanger (preferred air-cooled finned heat exchanger system) of heat transfer with ambient air in the cluster adopt groundwater to carry out the second heat exchanger (preferred square shell formula heat transfer) ware of heat transfer all the way, and this second heat exchanger water piping system connects groundwater heat transfer. The ground source heat pump utilizes the huge heat storage and cold accumulation capacity of underground soil, transfers heat from the underground soil to the interior of a building in winter, and transfers underground cold to the interior of the building in summer; due to the stability of heat exchange of the underground water system, the heat exchange capacity and the heat exchange efficiency of the unit are greatly improved at extreme environmental temperature.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic diagram of an air-cooled heat pump unit system according to an embodiment of the present invention;

wherein, 1, a scroll compressor; 2. a four-way reversing valve; 3. a finned heat exchanger; 4. an axial flow fan; 5. a square shell heat exchanger; 6. an electronic expansion valve; 7. a shell and tube heat exchanger; 8. a gas-liquid separator.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the present example provides an air-cooled heat pump unit system, which includes a compressor, a four-way reversing valve 2, a first heat exchanger for exchanging heat with ambient air, a second heat exchanger for exchanging heat with groundwater, an electronic expansion valve 6, a third heat exchanger for exchanging heat with water used at a user side, and a gas-liquid separator 8; the four-way reversing valve 2 comprises a first passage, a second passage, a third passage and a fourth passage;

the compressor, a first passage of the four-way reversing valve 2, the first heat exchanger, the second heat exchanger, the electronic expansion valve 6, the third heat exchanger, a second passage of the four-way reversing valve 2 and the gas-liquid separator 8 are sequentially communicated in a circulating mode to form a first circulating loop;

the compressor, the third passage of the four-way reversing valve 2, the third heat exchanger, the electronic expansion valve 6, the second heat exchanger, the first heat exchanger, the fourth passage of the four-way reversing valve 2 and the gas-liquid separator 8 are sequentially communicated in a circulating mode to form a second circulating loop.

In this example, the compressor is a scroll compressor.

In this example, the first heat exchanger includes a fin heat exchanger, and an axial fan located on one side of the fin heat exchanger and used for blowing ambient air to the fin heat exchanger, and the fin heat exchanger is respectively communicated with the four-way reversing valve and the second heat exchanger.

In this example, the second heat exchanger is a square shell heat exchanger.

In this example, the third heat exchanger is a shell and tube heat exchanger.

In this example, the refrigerant used in the air-cooled heat pump unit system is freon.

Specifically, the scroll compressor 1, a first passage of the four-way reversing valve 2, the finned heat exchanger 3, the square shell heat exchanger 5, the electronic expansion valve 6, the shell and tube heat exchanger 7, a second passage of the four-way reversing valve 2 and the gas-liquid separator 8 are sequentially communicated in a circulating manner to form a first circulation loop;

the scroll compressor 1, the third passage of the four-way reversing valve 2, the shell-and-tube heat exchanger 7, the electronic expansion valve 6, the square shell-and-tube heat exchanger 5, the finned heat exchanger 3, the fourth passage of the four-way reversing valve 2 and the gas-liquid separator 8 are sequentially communicated in a circulating mode to form a second circulation loop.

Specifically, in this example, during cooling: low-pressure gaseous freon (refrigerant) is sucked into the scroll compressor 1 and compressed into high-temperature high-pressure gaseous freon (refrigerant). High-temperature and high-pressure gaseous Freon (refrigerant) flows to an outdoor fin type heat exchanger 3 through a four-way reversing valve 2 and radiates heat to the outdoor through an axial flow fan 4, then the refrigerant is gradually condensed into high-pressure liquid Freon (refrigerant), and then enters the square shell type heat exchanger 5 to exchange heat with underground water to continuously reduce the temperature of the cold liquid Freon (refrigerant), and then the refrigerant is throttled and reduced in pressure (and simultaneously reduced in temperature) by the electronic expansion valve 6 to become a low-temperature low-pressure gas-liquid Freon (refrigerant) mixture, then the low-temperature low-pressure gas-liquid Freon (refrigerant) mixture enters the indoor shell-tube heat exchanger 7, the temperature of the water at the use side is reduced by absorbing the heat in the water at the use side and continuously vaporizing the water, the freon (refrigerant) is also changed into low-pressure gas, enters the gas-liquid separator 8 through the four-way reversing valve 2 and then returns to the scroll compressor 1, and circulating refrigeration is formed. If the outdoor environment temperature is higher than 35 ℃, the square shell type heat exchanger used as the second heat exchanger can reduce Freon (refrigerant) condensation pressure, reduce power current and improve the cold quantity and energy efficiency of the unit.

During heating: low-pressure gaseous freon (refrigerant) is sucked into the scroll compressor 1 and compressed into high-temperature high-pressure gaseous freon (refrigerant). High-temperature and high-pressure gas Freon (refrigerant) flows to the shell and tube heat exchanger 7 through the four-way reversing valve 2, heat dissipation makes the temperature of the water of the use side rise to the water of the use side, the high-pressure liquid Freon (refrigerant) is continuously condensed into high-pressure liquid Freon (refrigerant), the high-pressure liquid Freon (refrigerant) is throttled and depressurized (and also cooled down simultaneously) by the electronic expansion valve 6 and then becomes a gas-liquid Freon (refrigerant) mixture of low temperature and low pressure, the gas-liquid mixed Freon (refrigerant) enters the square shell heat exchanger 5 and is heat-absorbed and evaporated by groundwater heat exchange, then passes through the outdoor fin type heat exchanger 3, the Freon (refrigerant) also becomes low-pressure gas, and enters the gas-liquid separator 8 through the four-way reversing valve 2, and then returns to the scroll compressor 1. If the environment temperature is less than 7 ℃, the temperature of the underground water can reach about 10 ℃ although the environment temperature is reduced when the axial flow fan 4 is not started, and the higher water inlet temperature of the square shell type heat exchanger 5 is used for increasing the evaporation temperature of liquid Freon (refrigerant), so that the heat of the unit is not greatly attenuated.

To sum up, the utility model discloses innovatively in the first heat exchanger (preferred air-cooled finned heat exchanger system) that carries out the heat transfer with ambient air the cluster all the way adopt groundwater to carry out the second heat exchanger (preferred square-shell heat transfer) ware of heat transfer, and this second heat exchanger water piping system connects groundwater heat transfer. The ground source heat pump utilizes the huge heat storage and cold accumulation capacity of underground soil, transfers heat from the underground soil to the interior of a building in winter, and transfers underground cold to the interior of the building in summer; due to the stability of heat exchange of the underground water system, the heat exchange capacity and the heat exchange efficiency of the unit are greatly improved at extreme environmental temperature.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. An air-cooled heat pump unit system is characterized by comprising a compressor, a four-way reversing valve, a first heat exchanger for exchanging heat with ambient air, a second heat exchanger for exchanging heat with underground water, an electronic expansion valve, a third heat exchanger for exchanging heat with water used at a user side, and a gas-liquid separator; the air-cooled heat pump unit system comprises a first circulation loop with a refrigeration function and a second circulation loop with a heating function, and the four-way reversing valve comprises a first passage, a second passage, a third passage and a fourth passage;

2. The air-cooled heat pump battery system of claim 1, wherein the compressor is a scroll compressor.

3. The air-cooled heat pump unit system of claim 1, wherein the first heat exchanger comprises a finned heat exchanger, an axial fan located on one side of the finned heat exchanger for blowing ambient air to the finned heat exchanger, the finned heat exchanger being in communication with the four-way reversing valve and the second heat exchanger, respectively.

4. The air-cooled heat pump battery system of claim 1, wherein the second heat exchanger is a square-shell heat exchanger.

5. The air-cooled heat pump battery system of claim 1, wherein the third heat exchanger is a shell and tube heat exchanger.

6. The air-cooled heat pump unit system of claim 1, wherein a refrigerant used in the air-cooled heat pump unit system is freon.