DE112014000324B4 - On-line self-diagnostic system for a heat pump water heater and control method and apparatus therefor - Google Patents

Abstract

On-line self-diagnostic system for a heat pump water heater, which is used for an online product quality check on a production line for heat pump water heaters and for fault detection and evaluation of a product in customer service, wherein the heat pump water heater (100) has a compressor (110), a cold water condenser (120), an evaporator (140) and a water tank (160) connected to the cold water condenser (120), and a heat pump water heater controller (190) used to control the operation of the heat pump water heater (100) wherein the on-line self-diagnosis system for the heat pump water heater (100) is characterized in that: the on-line self-diagnosis system of the heat pump water heater (100) a self-diagnosis control device, a high-pressure side pressure detection module (222), a low-pressure side pressure detection module (223), a Supply energy detection module (224), a water quantity detection - and -einstellmodul (225) and a database management system (300); the high-pressure side pressure detection module (222) is connected to a high pressure line of the compressor (110) and the low-pressure side pressure detection module (223) is connected to a low-pressure line of the compressor (110), wherein the supply energy detection module (224) is connected to a power supply inlet of the heat pump water heater (100) and the water amount detection and setting module (225) is connected to a cold water inlet of the heat pump water heater (100); the self-diagnosis control device, a data analysis unit (211), a quality control control terminal (212), an ambient temperature detection module (213) and a heat pump water heater interface unit (220); the quality control control terminal (212) and the ambient temperature detection module (213) are connected to the data analysis unit (211), the data analysis unit (211) with the data nbank management system (300) and accesses a database for variable operating conditions for the heat pump water heater via the database management system (300); the heat pump water heater controller (190) comprises an RS485 interface module (221), the data analysis unit (211 ) communicates bidirectionally with the RS485 interface module (221) of the heat pump water heater controller (190) via the heat pump water heater interface unit (220); and the high-pressure side pressure detection module (222), the low-pressure side pressure detection module (223), the supply energy detection module (224) and the water quantity detection and setting module (225) are connected to the data analysis unit (211) via the heat pump-water heater interface unit (220).

Description

1. 1. chinesische Patentanmeldung CN 103 471 866 A , eingereicht am 20. August 2013;
2. 2. chinesische Patentanmeldung CN 103 454 924 A , eigereicht am 20. August 2013.

The present application claims priority to the following Chinese patent applications:

1. 1. Chinese patent application CN 103 471 866 A , filed August 20, 2013;
2. 2. Chinese patent application CN 103 454 924 A , submitted on August 20, 2013.

Technical area

The invention relates to quality detection and a control device for a fluid heater using a heat pump, in particular an on-line self-diagnosis system for a heat pump water heater used for a heat pump water heater unit, and a control method and device therefor.

Background technology

Because of many advantages of energy saving, environmental protection, safety, etc., heat pump water heaters have been recognized by the state and society. The product has broad market prospects and created a revolutionary trend to replace traditional hot water systems. In addition, companies of all sizes in the domestic water heater and air conditioner business are gradually turning to this area. However, since some medium and small enterprises do not have the necessary research and development, production and quality inspection skills, products made by such enterprises are unstable in quality and poor in energy saving after being put on the market, with negative consequences for the Consumers and has a major negative impact on the development of the overall heat pump water heater market. Also, the quality inspection thresholds of some faucet manufacturers of the heat pump water heater are mixed good and bad, and the faucet purchasing quality control is bad, so it is very difficult to ensure the quality of the whole unit of the heat pump water heater. There is a lack of a required online self-diagnostic system for heat pump water heaters, and workers or quality inspectors responsible for the handover inspection also lack the necessary technical equipment so that they have no means at their disposal to assess whether the product is can be operated safely and reliably for variable operating conditions, so that the handover inspection is often just a matter of form. Therefore, improving the product quality of shipped heat pump water heaters is a major problem faced by the heat pump water heater industry.

In the Chinese patent for the invention "An air conditioning heat exchanger detecting system" (Chinese publication number: CN 101 692 020 B ) describes an air conditioning heat exchanger detection system comprising a low-voltage circulating tank, a liquid feed pump and a tested heat exchanger, the low-voltage circulating tank being connected to an input end and an output end of the tested heat exchanger via an indoor input pipe and an indoor output pipe is, the liquid feed pump is arranged between the low-voltage circulating tank and the indoor input pipe, and the low-voltage circulating tank is connected to an outdoor air conditioning unit via an outdoor output pipe and an air return pipe, characterized in that the connection between the low-voltage circulating tank and the outside exit pipe has a ball float valve which is used to control the refrigerant flow rate of the outside exit pipe, and wherein the ball float valve is arranged in the low-voltage circulating tank. When combined with an enthalpy laboratory or a heat balance laboratory, the detection system of the invention can quickly compare the heat exchange performances of different heat exchangers. The invention is primarily used for detecting the heat exchange performance of the heat exchanger of the heat pump system and is unable to solve the technical problem of an on-line quality check of the entire unit of the heat pump water heater.

In the Chinese patent for the invention "Test system of air cooled heat pump" (Chinese publication number: CN 103 175 706 A ) describes a test system for an air-cooled heat pump, wherein the inner part of a tested unit has an air treatment box, while the outer part of a climatic room has a heat-equalizing water tank. By performing cold / heat distribution and cold / heat equalization between the unit under test, a cold and heat source from an external cold source, a surface air cooler in the air treatment box, and a heat equalization water tank, water supply to different temperature zones is required. During the test process, the temperature and humidity controls of the entire air conditioning system can be implemented without an additional heat source by adjusting the flow of water as refrigerant that enters the air treatment box of the test room will. The large tested unit of an air-cooled heat pump can implement the independent control of an air inlet temperature section of a condenser. In a time of the year when the outside temperature is low, the operating conditions required to test the unit under test can be realized by controlling the amount of air in and out of the test room, saving 50% of the energy used to test the unit. This system can be used for research and development tests of products as well as for the performance test of the unit under test on the air-cooled production line for heat pumps. However, this system realizes the performance test of the tested heat pump unit with the help of an air-conditioned room, but it still cannot solve the technical problem of the online quality check of the heat pump water heater product.

For example, the Chinese utility model discloses CN 202 101 419 U a remotely monitored heat pump hot water system with a remote network monitoring function.

The EP patent application EP 1 879 112 A2 discloses a compressor storage system including a compressor having a first non-volatile memory connected to a module. The module has a processor and a second non-volatile memory. The first non-volatile memory is connected to the compressor. The module is selectively connected to the compressor and the processor is configured to access the first and second non-volatile memories. A compressor has non-volatile memory that stores manufacturing data related to the compressor.

The US patent US 7 082 380 B2 discloses a refrigeration monitor and method capable of acquiring and recording data from selected sensors connected to the refrigeration machine being monitored.

The US patent US 7 200 524 B2 discloses a method of diagnosing sensor failures used in heating, ventilation and air conditioning systems, including the step of creating component models for certain components in the system.

However, the above patent documents cannot be used to realize the on-line automatic quality check of the entire heat pump water heater, nor can they solve the technical problem of the on-line quality check of the heat pump water heater product.

Brief description of the invention

It is the object of the invention to provide an online self-diagnosis system for a heat pump water heater. Variable operating condition test data is obtained using a heat pump water heater controller; the automatic online quality assessment of the entire heat pump water heater unit is realized by comparing the test data with basic data from a database for variable operating conditions, thereby solving the technical problem of online quality testing of a heat pump water heater product.

In the following description, the terms “heat pump water heater controller” and “heat pump water heater control unit” are used interchangeably.

• einem Online-Selbstdiagnosesystem für einen Wärmepumpen-Wassererhitzer, das für die Online-Produktqualitätsprüfung auf einer Produktionsstraße für Wärmepumpen-Wassererhitzer sowie für die Fehlererkennung und die Beurteilung eines Produkts im Kundendienst verwendet wird, wobei der Wärmepumpen-Wassererhitzer einen Kompressor, einen Kaltwasserkondensator, einen Verdampfer und einen mit dem Kaltwasserkondensator verbundenen Wasserbehälter und einen Wärmepumpen-Wassererhitzer-Controller aufweist, der zum Steuern des Betriebs des Wärmepumpen-Wassererhitzers verwendet wird, wobei das Online-Selbstdiagnosesystem für einen Wärmepumpen-Warmwassererhitzer dadurch gekennzeichnet ist, dass:
  • das Online-Selbstdiagnosesystem für einen Wärmepumpen-Wassererhitzer ein Selbstdiagnosesteuergerät, ein hochdruckseitiges Druckerfassungsmodul, ein niederdruckseitiges Druckerfassungsmodul, ein Versorgungsenergieerfassungsmodul, ein Wassermengenerfassungs- und -einstellmodul und ein Datenbankverwaltungssystem aufweist;
  • das hochdruckseitige Druckerfassungsmodul mit einer Hochdruckleitung des Kompressors verbunden ist und das niederdruckseitige Druckerfassungsmodul mit einer Niederdruckleitung des Kompressors verbunden ist, das Versorgungsenergieerfassungsmodul mit einem Energieeingang des Wärmepumpen-Wassererhitzers verbunden ist und das Wassermengenerfassungs- und -einstellmodul mit einem Kaltwassereinlass des Wärmepumpen-Wassererhitzers verbunden ist;
  • das Selbstdiagnosesteuergerät eine Datenanalyseeinheit, ein Qualitätsprüfungssteuerungsendgerät, ein Umgebungstemperaturerfassungsmodul und eine Wärmepumpen-Wassererhitzer-Schnittstelleneinheit aufweist;
  • das Qualitätsprüfungssteuerungsendgerät und das Umgebungstemperaturerfassungsmodul mit der Datenanalyseeinheit verbunden sind, wobei die Datenanalyseeinheit mit dem Datenbankmanagementsystem verbunden ist, und über das Datenbankverwaltungssystem auf eine Datenbank für variable Betriebsbedingungen des Wärmepumpen-Wassererhitzers zugreift;
  • der Wärmepumpen-Wassererhitzer-Controller ein RS485-Schnittstellenmodul aufweist, wobei die Datenanalyseeinheit über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit mit dem RS485-Schnittstellenmodul des Wärmepumpen-Wassererhitzer-Controllers bidirektional kommuniziert; und
  • das hochdruckseitige Druckerfassungsmodul, das niederdruckseitige Druckerfassungsmodul, das Versorgungsenergieerfassungsmodul und das Wassermengenerfassungs- und -einstellmodul über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit mit der Datenanalyseeinheit verbunden sind.

The technical solution of the present invention for solving the technical problem consists in:

• an online self-diagnostic system for a heat pump water heater, which is used for online product quality check on a production line for heat pump water heaters, as well as for fault detection and assessment of a product in customer service, where the heat pump water heater has a compressor, a cold water condenser, an evaporator and a water tank connected to the cold water condenser and a heat pump water heater controller used to control the operation of the heat pump water heater, the on-line self-diagnostic system for a heat pump water heater being characterized in that:
  • the on-line self-diagnosis system for a heat pump water heater comprises a self-diagnosis control device, a high-pressure side pressure detection module, a low-pressure side pressure detection module, a supply energy detection module, a water amount detection and setting module, and a database management system;
  • the high-pressure side pressure detection module is connected to a high pressure line of the compressor and the low-pressure side pressure detection module is connected to a low pressure line of the compressor, the supply energy detection module is connected to an energy input of the heat pump water heater and the water amount detection and adjustment module is connected to a cold water inlet of the heat pump water heater;
  • the self-diagnosis control device includes a data analysis unit, a quality check control terminal, an ambient temperature detection module, and a heat pump-water heater interface unit;
  • the quality inspection control terminal and the ambient temperature detection module are connected to the data analysis unit, the data analysis unit being connected to the database management system, and accessing a database of variable operating conditions of the heat pump water heater through the database management system;
  • the heat pump / water heater controller has an RS485 interface module, the data analysis unit communicating bidirectionally via the heat pump / water heater interface unit with the RS485 interface module of the heat pump / water heater controller; and
  • the high-pressure side pressure detection module, the low-pressure side pressure detection module, the supply energy detection module and the water quantity detection and setting module are connected to the data analysis unit via the heat pump-water heater interface unit.

A good technical solution of the online self-diagnosis system according to the invention for the heat pump water heater is characterized in that the self-diagnosis control device has a network interface module and the self-diagnosis control device is connected to a local or a remote database management system via the network interface module.

A better technical solution of the online self-diagnosis system according to the invention for a heat pump water heater is characterized in that the high-pressure side pressure detection module, the low-pressure side pressure detection module, the supply energy detection module and / or the water volume detection and setting module are function modules of the heat pump water heater controller and the data analysis unit with is connected to the corresponding function modules of the heat pump water heater controller via the RS485 interface module which is connected to the heat pump water heater interface unit in order to obtain the corresponding test data for variable operating conditions.

• ein Online-Selbstdiagnosesteuerverfahren eines Wärmepumpen-Wassererhitzers, das auf das Online-Selbstdiagnosesystem für einen Wärmepumpen-Wassererhitzer angewendet wird, durch die folgenden Schritte gekennzeichnet ist:
  • S1: Analysieren und Berechnen der Betriebsbedingungen des Wärmepumpen-Wassererhitzers, Bestätigen der Basisdaten für variable Betriebsbedingungen und der Qualitätsbewertungskriterien des Wärmepumpen-Wassererhitzers durch experimentelle Verifizierung der Enthalpiedifferenz und Aufbauen der Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer;
  • S2: Verbinden des Selbstdiagnosesteuergeräts mit dem Wärmepumpen-Wassererhitzer-Controller und Erhalten der Testdaten für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer durch den Wärmepumpen-Wassererhitzer-Controller;
  • S3: Vergleichen der Testdaten für variable Betriebsbedingungen mit den Basisdaten für variable Betriebsbedingungen von der Datenbank für variable Betriebsbedingungen und Beurteilen der Qualität des Wärmepumpen-Wassererhitzers gemäß den Qualitätsbewertungskriterien.

Another object of the present invention is to provide an on-line self-diagnosis control method used for a heat pump water heater which can realize process control of the quality check diagnosis of the heat pump water heater by a self-diagnosis controller of the heat pump water heater product. The technical solution of the present invention, which is applied to solve the technical problems mentioned above, is that:

• an on-line self-diagnosis control method of a heat pump water heater, which is applied to the on-line self-diagnosis system for a heat pump water heater, is characterized by the following steps:
  • S1: Analyzing and calculating the operating conditions of the heat pump water heater, confirming the basic data for variable operating conditions and the quality evaluation criteria of the heat pump water heater by experimental verification of the enthalpy difference and building the database for variable operating conditions for the heat pump water heater;
  • S2: connecting the self-diagnosis control device to the heat pump water heater controller and obtaining test data for variable operating conditions for the heat pump water heater by the heat pump water heater controller;
  • S3: Compare the test data for variable operating conditions with the basic data for variable operating conditions from the database for variable operating conditions and evaluate the quality of the heat pump water heater according to the quality evaluation criteria.

• S110: Versuchsproduktion einer Kleinserie von Test-Prototypen des endgefertigten Wärmepumpen-Wassererhitzers;
• S120: Ausführen eines Enthalpiedifferenztests für variable Umgebungsbetriebsbedingungen bezüglich der Kleinserie der Test-Prototypen;
• S130: Ausführen einer vergleichenden Analyse und Verifizierung bezüglich den experimentellen Daten für variable Betriebsbedingungen, die durch den Enthalpiedifferenztest erhalten werden, mit den theoretischen Konstruktionsdaten für variable Betriebsbedingungen;
• S140: die Basisdaten für variable Betriebsbedingungen und die Qualitätsbewertungskriterien werden unter Bezug auf die Produktdesignparameter und den Produktqualitätsstandard definiert;
• S150: ein Modell variabler Betriebsbedingungen für das endgefertigte neue Produkt des Wärmepumpen-Wassererhitzers wird durch Gruppieren und Klassifizieren der Basisdaten für variable Betriebsbedingungen und der Qualitätsbewertungskriterien gemäß dem Modell der Test-Prototypen aufgebaut;
• S160: die Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer wird durch Hinzufügen des Modells variabler Betriebsbedingungen zur Datenbank über das Datenbankverwaltungssystem aufgebaut.

A better technical solution of the online self-diagnostic control method according to the invention for a heat pump water heater is characterized in that the database for variable operating conditions is built using the following steps:

• S110: Trial production of a small series of test prototypes of the finished heat pump water heater;
• S120: carrying out an enthalpy difference test for variable ambient operating conditions with respect to the small series of the test prototypes;
• S130: performing comparative analysis and verification on the experimental data for variable operating conditions obtained by the enthalpy difference test with the theoretical design data for variable operating conditions;
• S140: the basic data for variable operating conditions and the quality evaluation criteria are defined with reference to the product design parameters and the product quality standard;
• S150: a model of variable operating conditions for the finished new product of the heat pump water heater is constructed by grouping and classifying the basic data for variable operating conditions and the quality evaluation criteria according to the model of the test prototypes;
• S160: the variable operating condition database for the heat pump water heater is constructed by adding the variable operating condition model to the database through the database management system.

An improved technical solution of the online self-diagnostic control method according to the invention for the heat pump water heater is characterized in that the basic data for variable operating conditions and the test data for variable operating conditions include an ambient dry bulb temperature, an ambient wet bulb temperature, a water inlet temperature, a water outlet temperature, a water flow, a Outlet temperature, a suction temperature and a fin temperature and a high-pressure side pressure, a low-pressure side pressure, a supply voltage, a current and a power.

• (1) Toleranz des hochdruckseitigen Drucks: ± 5%;
• (2) Toleranz der niederdruckseitigen Drucks: ± 5%;
• (3) Toleranz der Temperaturdifferenz des Umwälzwassers: ± 0,25°C;
• (4) Toleranz der Lamellentemperatur ± 3°C, und Ansaugtemperatur ist nicht niedriger als die Umgebungstemperatur -8°C;
• (5) Toleranz der Auslasstemperatur: ± 10%, und die Auslasstemperatur nicht niedriger als die Wasserbehältertemperatur +15°C;
• (6) Toleranz der Ansaugtemperatur: ± 10%, und Ansaugtemperatur ist nicht niedriger als Umgebungstemperatur -5°C;
• (7) Leistungstoleranz: ± 10%;
• (8) Stromtoleranz: ± 10% bei einem Spannungsversorgungsdruck von 220V/50Hz.

A further improved technical solution of the online self-diagnosis control method according to the invention for a heat pump water heater is characterized in that the quality evaluation criteria contain the following elements:

• (1) Tolerance of high pressure side printing: ± 5%;
• (2) Low side pressure tolerance: ± 5%;
• (3) Tolerance of the temperature difference of the circulating water: ± 0.25 ° C;
• (4) Fin temperature tolerance ± 3 ° C, and suction temperature is not lower than ambient temperature -8 ° C;
• (5) Outlet temperature tolerance: ± 10%, and the outlet temperature not lower than the water tank temperature + 15 ° C;
• (6) Tolerance of suction temperature: ± 10%, and suction temperature is not lower than ambient temperature -5 ° C;
• (7) Power tolerance: ± 10%;
• (8) Current tolerance: ± 10% at a power supply pressure of 220V / 50Hz.

• dass ein Online-Selbstdiagnosesteuergerät für einen Wärmepumpen-Wassererhitzer, das für das Online-Selbstdiagnosesystem für einen Wärmepumpen-Wassererhitzer verwendet wird und mit dem Wärmepumpen-Wassererhitzer-Controller und dem Datenbankverwaltungssystem verbunden ist, dadurch gekennzeichnet, dass:
  • das Online-Selbstdiagnosesteuergerät eine Datenanalyseeinheit, ein Qualitätsprüfungssteuerungsendgerät, ein Umgebungstemperaturerfassungsmodul, eine Wärmepumpen-Wassererhitzer-Schnittstelleneinheit, ein hochdruckseitiges Druckerfassungsmodul, ein niederdruckseitiges Druckerfassungsmodul, ein Versorgungsenergieerfassungsmodul und ein Wassermengenerfassungs- und -einstellmodul aufweist;
  • das Qualitätsprüfungssteuerungsendgerät und das Umgebungstemperaturerfassungsmodul mit der Datenanalyseeinheit verbunden sind, wobei die Datenanalyseeinheit mit dem Datenbankverwaltungssystem verbunden ist, und über das Datenbankverwaltungssystem auf die Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer zugreift;
  • der Wärmepumpen-Wassererhitzer-Controller ein RS485-Schnittstellenmodul aufweist, wobei die Datenanalyseeinheit über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit mit dem RS485-Schnittstellenmodul des Wärmepumpen-Wassererhitzer-Controllers bidirektional kommuniziert; und
  • das hochdruckseitige Druckerfassungsmodul, das niederdruckseitige Druckerfassungsmodul, das Versorgungsenergieerfassungsmodul und das Wassermengenerfassungs- und -einstellmodul über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit mit der Datenanalyseeinheit verbunden sind.

A third object of the present invention is to provide an on-line self-diagnosis controller for a heat pump water heater which is used for the on-line self-diagnosis system for a heat pump water heater. The technical solution that is applied to solve the above technical problems is:

• that an online self-diagnostic control device for a heat pump water heater, which is used for the online self-diagnostic system for a heat pump water heater and is connected to the heat pump water heater controller and the database management system, characterized in that:
  • the on-line self-diagnostic control device comprises a data analysis unit, a quality check control terminal, an ambient temperature detection module, a heat pump water heater interface unit, a high-pressure side pressure detection module, a low-pressure side pressure detection module, a supply energy detection module, and a water amount detection and setting module;
  • the quality inspection control terminal and the ambient temperature detection module are connected to the data analysis unit, the data analysis unit connected to the database management system, and accessing the variable operating condition database for the heat pump water heater through the database management system;
  • the heat pump / water heater controller has an RS485 interface module, the data analysis unit communicating bidirectionally via the heat pump / water heater interface unit with the RS485 interface module of the heat pump / water heater controller; and
  • the high-pressure side pressure detection module, the low-pressure side pressure detection module, the supply energy detection module and the water quantity detection and setting module are connected to the data analysis unit via the heat pump-water heater interface unit.

A good technical solution of the online self-diagnosis control device according to the invention for a heat pump water heater is characterized in that the self-diagnosis control device has a network interface module and the self-diagnostic control unit is connected to a local or a remote database management system via the network interface module.

A better technical solution of the online self-diagnosis control device according to the invention for a heat pump water heater is characterized in that the high-pressure side pressure detection module, the low-pressure side pressure detection module, the supply energy detection module and / or the water volume detection and setting module are function modules of the heat pump water heater controller, and the data analysis unit is connected to the corresponding function modules of the heat pump water heater controller via the RS485 interface module connected to the heat pump water heater interface unit in order to obtain the corresponding test data for variable operating conditions.

• 1. Durch den Aufbau der Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer wird durch das erfindungsgemäße Online-Selbstdiagnosesystem für einen Wärmepumpen-Wassererhitzer, sein Steuerverfahren und -gerät eine Prüfbasis für die Online-Selbstdiagnosetechnik des Wärmepumpen-Wassererhitzers bereitgestellt und wird eine zuverlässige Basis für die Automatisierung der Qualitätsprüfung des Wärmepumpen-Wassererhitzers bereitgestellt, wird eine manuelle Beurteilung durch eine automatische Computerdiagnose ersetzt, um zu beurteilen, ob das Produkt qualifiziert ist, so dass die Beurteilung genauer ist, kann die Produktübergabequalität gewährleistet werden und ist der Intelligenzgrad höher.
• 2. Unter Verwendung der von den eingebauten Funktionsmodulen des Wärmepumpen-Wassererhitzer-Controllers selbst erhaltenen Testdaten sind für das Online-Selbstdiagnosesystem des Wärmepumpen-Wassererhitzers, sein Steuerverfahren und -gerät keine spezielle Testumgebungsausstattung und keine speziellen Erfassungsgeräte erforderlich, die für das Qualitätsprüfsystem konfiguriert sind, sowie keine Verbindung und Installation zwischen der Qualitätsprüfungsvorrichtung und dem getesteten Wärmepumpen-Wassererhitzer, womit das technische Problem der Online-Qualitätsprüfung der gesamten Einheit des Wärmepumpen-Wassererhitzers gelöst wird, die Qualität der gesamten Einheit des Wärmepumpen-Wassererhitzers gewährleistet wird und ferner die Kosten für die Qualitätsprüfung von Produkten wesentlich gesenkt werden.
• 3. Das erfindungsgemäße Online-Selbstdiagnosesystem des Wärmepumpen-Wassererhitzers, sein Steuerverfahren und -gerät können auf den Produkt-Kundendienst angewendet werden und können Kundendienstpersonal oder Händler dabei unterstützen, zu bewerten, ob das Produkt sich in einem normalen Betriebszustand befindet, und schnell eine Fehlerursache und fehlerhafte Teile einer defekten Einheit zu ermitteln.

Compared with the prior art, the invention has the following advantages:

• 1. By building the database for variable operating conditions for the heat pump water heater, the online self-diagnosis system according to the invention for a heat pump water heater, its control method and device provides a test basis for the online self-diagnosis technology of the heat pump water heater and becomes a reliable basis Provided for automating the quality inspection of the heat pump water heater, manual judgment is replaced by automatic computer diagnosis to judge whether the product is qualified, so that the judgment is more accurate, the product delivery quality can be ensured and the level of intelligence is higher.
• 2. Using the test data obtained from the built-in functional modules of the heat pump water heater controller itself, the heat pump water heater's online self-diagnosis system, its control method and device do not require any special test environment equipment or special detection devices configured for the quality control system, as well as no connection and installation between the quality checking device and the tested heat pump water heater, thus solving the technical problem of the online quality check of the whole unit of the heat pump water heater, the quality of the whole unit of the heat pump water heater is ensured and furthermore the costs for the Quality inspection of products can be reduced significantly.
• 3. The inventive on-line self-diagnostic system of the heat pump water heater, its control method and apparatus can be applied to the product service and can assist service personnel or dealers in assessing whether the product is in a normal operating condition and quickly identifying a cause of failure and identify defective parts of a defective unit.

Figure list

• 1 Fig. 13 is a schematic diagram of the self-diagnostic controller of the on-line self-diagnostic system for a heat pump water heater of the present invention;
• 2 Figure 12 is a schematic diagram of the on-line self-diagnostic system for a heat pump water heater of the present invention;
• 3 Fig. 10 shows a control flow diagram of the on-line self-diagnostic system for a heat pump water heater; and
• 4th Fig. 13 is a structural diagram of a basic data table of the variable operating condition database for the heat pump water heater.

List of reference symbols

100

Heat pump water heater,

110

Compressor,

120

Cold water condenser,

130

Flow regulator,

140

Evaporator,

150

Gas-liquid separator,

160

Water tank,

170

Hot water booster pump,

180

Circulation pump,

190

Heat pump water heater controller,

200

Self-diagnosis control unit,

211

Data analysis unit,

212

Quality inspection control terminal,

213

Ambient temperature detection module,

220

Heat pump water heater interface unit,

221

RS485 interface module,

222

high pressure side pressure acquisition module,

223

low pressure side pressure acquisition module,

224

Supply energy acquisition module,

225

Water volume recording and setting module,

230

Network interface module,

300

Database management system.

Specific embodiment

For a better understanding of the above technical solution of the present invention, the invention is described in detail below with reference to the accompanying figures and embodiments.

The on-line self-diagnostic control system for a heat pump water heater is applicable to the on-line product quality inspection on a production line for heat pump water heater and to the failure detection and evaluation of products in after-sales service. According to the in 2 The embodiment shown has the heat pump water heater 100 a heat pump system that works by connecting a compressor 110 , a cold water condenser 120 , a flow regulator 130 , an evaporator 140 and a gas-liquid separator 150 a water heating loop is formed by connecting the cold water condenser 120 with a water tank 160 and connecting a hot water booster pump 170 with a circulation pump 180 and a heat pump water heater controller 190 used to control the operation of the unit.

The on-line self-diagnosis system of the heat pump water heater of the present invention comprises a self-diagnosis controller 200 , a high pressure side pressure acquisition module 222 , a low-pressure side pressure acquisition module 223 , a utility energy acquisition module 224 , a water volume recording and setting module 225 and a database management system 300 on.

The high-pressure side pressure acquisition module 222 is connected to a high pressure line of the compressor 110 connected, and the low-pressure side pressure detection module 223 is connected to a low pressure line of the compressor 110 tied together. The supply energy acquisition module 224 is with a power input of the heat pump water heater 100 and the water amount detection and setting module 250 is connected to a cold water inlet of the heat pump water heater 100 tied together.

As in 1 is shown, has an embodiment of the self-diagnostic control unit 200 of the on-line self-diagnosis system for the heat pump water heater of the present invention includes a data analysis unit 211 , a quality inspection control terminal 212 , an ambient temperature detection module 213 , a heat pump water heater interface unit 220 and a network interface module 230 on. The data analysis unit 211 and the quality inspection control terminal 212 can be an industrial control computer as well as a portable computer or a tablet computer. In particular, the self-diagnostic control unit 200 be a portable computer or a tablet computer, so that they can identify and assess on site whether the product is working under normal operating conditions and determine in good time a cause of the fault and a defective part of a defective unit.

The quality check control terminal 212 and the ambient temperature detection module 213 are with the data analysis unit 211 connected, the data analysis unit 211 is through the network interface module 230 with the database management system 300 connected and accesses the database for variable operating conditions for the heat pump water heater. In this embodiment, the database management system 300 be a database management system located on the production line and a remote database management system located at the headquarters of a company. In particular, when the self-diagnosis system of the present invention is used for fault detection and evaluation of a product of the heat pump water heater in customer service, the technical solution according to which the remote database management system located at the headquarters of the company is searched is a better choice.

The heat pump water heater controller 190 assigns the RS485 interface module 221 on, the data analysis unit 211 communicates bidirectionally with the RS485 interface module of the heat pump water heater controller 190 via the heat pump water heater interface unit 220 , and using a control sensor of the heat pump water heater controller 190 Inlet water temperature, outlet water temperature, outlet temperature, suction temperature, fin temperature and other test data for variable operating conditions for the heat pump water heater 100 can be obtained.

The high-pressure side pressure acquisition module 222 , the low-pressure side Pressure acquisition module 223 , the supply energy acquisition module 224 and the water quantity detection and setting module 225 are via the heat pump water heater interface unit 220 with the data analysis unit 211 and the ambient dry bulb temperature, ambient wet bulb temperature, water flow rate, high side pressure, low side pressure, supply voltage, current, power and other test data for variable operating conditions can be obtained. For some high quality heat pump water heaters 100 is the heat pump water heater controller 190 with the pressure detection module on the high pressure side 222 , the low-pressure side pressure acquisition module 223 , the supply energy recording module 224 and / or the water volume detection and adjustment module 225 and other built-in function modules have been configured. Under these circumstances, the data analysis unit 211 of the heat pump water heater online self-diagnosis system according to the water flow rate, high pressure side pressure, low pressure side pressure, supply voltage, current, power and other test data for various operating conditions with the help of the heat pump water heater interface unit 220 connected RS485 interface module 221 directly via the corresponding function modules of the heat pump water heater controller 190 obtain.

• S1: Analysieren und Berechnen des Betriebszustands des Wärmepumpen-Wassererhitzers für variable Betriebsbedingungen, Bestätigen der Basisdaten für verschiedene Betriebsbedingungen und der Qualitätsbewertungskriterien des Wärmepumpen-Wassererhitzers durch experimentelles Verifizieren der Enthalpiedifferenz, und Aufbauen der Datenbank für variable Betriebsbedingungen für den Wärmepum pen-Wassererh itzer;
• S2: Verbinden des Selbstdiagnosesteuergeräts mit dem Wärmepumpen-Wassererhitzer-Controller und Erhalten der Testdaten des Wärmepumpen-Wassererhitzers für variable Betriebsbedingungen über den Wärmepumpen-Wassererhitzer-Controller, wobei die Testdaten für variable Betriebsbedingungen die Testdaten sind, die hauptsächlich durch die eingebauten Funktionsmodule des Wärmepumpen-Wassererhitzer-Controllers selbst erhalten werden, ohne dass eine zusätzliche Testumgebung und zusätzliche Testgeräte speziell für die Qualitätsprüfung bereitgestellt werden. Beispielsweise wird der Steuersensor des Wärmepumpen-Wassererhitzer-Controllers 190 verwendet, um die Wassereinlasstemperatur, die Wasserauslasstemperatur, die Auslasstemperatur, die Ansaugtemperatur, die Lamellentemperatur und andere Testdaten des Wärmepumpen-Wassererhitzers 100 für variable Betriebsbedingungen zu erhalten;
• S3: Vergleichen der Betriebstestdaten für verschiedene Betriebsbedingungen mit den Basisdaten für verschiedene Betriebsbedingungen in der Datenbank für variable Betriebsbedingungen und Beurteilen der Qualität des Wärmepumpen-Wassererhitzers gemäß Qualitätsbewertungskriterien.

The on-line self-diagnostic control method for the heat pump water heater of the present invention comprises the following steps:

• S1: Analyzing and calculating the operating state of the heat pump water heater for variable operating conditions, confirming the basic data for various operating conditions and the quality assessment criteria of the heat pump water heater by experimentally verifying the enthalpy difference, and building the database for variable operating conditions for the heat pump water heater;
• S2: Connect the self-diagnosis control device to the heat pump water heater controller and obtain the test data of the heat pump water heater for variable operating conditions via the heat pump water heater controller, the test data for variable operating conditions being the test data mainly obtained by the built-in function modules of the heat pump Water heater controller itself can be obtained without providing an additional test environment and additional test equipment specifically for quality control. For example, the control sensor of the heat pump water heater controller 190 used to calculate inlet water temperature, outlet water temperature, outlet temperature, suction temperature, fin temperature and other test data of the heat pump water heater 100 for variable operating conditions;
• S3: Compare the operating test data for various operating conditions with the basic data for various operating conditions in the database for variable operating conditions and assess the quality of the heat pump water heater according to quality evaluation criteria.

• S100: Analysieren und Berechnen des Betriebszustands des Wärmepumpen-Wassererhitzers für variable Betriebsbedingungen, Erhalten der Basisdaten des Wärmepumpen-Wassererhitzers für variable Betriebsbedingungen durch experimentelles Verifizieren der Enthalpiedifferenz und Aufbauen der Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer;
• S200: Eingabe des Typs des getesteten Wärmepumpen-Wassererhitzers über das Qualitätsprüfungssteuerungsendgerät 212, Scannen des Produkt-Barcodes und Einlesen der Barcodeinformation;
• S210: Erhalten der Betriebsumgebungsdaten des Online-Selbstdiagnosesystems des Wärmepumpen-Wassererhitzers, wobei die Betriebsumgebungsdaten die Trockenkugeltemperatur und die Feuchtkugeltemperatur der Betriebsumgebung des getesteten Wärmepumpen-Wassererhitzers enthalten;
• S220: Durchsuchen der Datenbank für variable Betriebsbedingungen des Wärmepumpen-Wassererhitzers gemäß dem Typ und den Betriebsumgebungsdaten des getesteten Wärmepumpen-Wassererhitzers und Erhalten der Basisdaten für variable Betriebsbedingungen und der Qualitätsbewertungskriterien des getesteten Wärmepumpen-Wassererhitzers in der aktuellen Betriebsumgebung;
• S230: Erzeugen der Basisdatentabelle des getesteten Wärmepumpen-Wassererhitzers und Bestimmen der Online-Selbstdiagnoseerfassungselemente;
• S240: Erzeugen eines Sollwertes des Wasserdurchflusses der getesteten Einheit und Zuführen des Sollwertes zum Wärmepumpen-Wassererhitzer-Controller 190 über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit 220, Einstellen des Wasserdurchflusses des getesteten Wärmepumpen-Wassererhitzers durch den Wärmepumpen-Wassererhitzer-Controller 190 gemäß dem Wasserdurchfluss-Sollwert;
• S250: Steuern und Starten des getesteten Wärmepumpen-Wassererhitzers 100 durch den Wärmepumpen-Wassererhitzer-Controller 190, wobei der getestete Wärmepumpen-Wassererhitzer 100 die Qualitätsprüfungsdiagnoseverarbeitung gemäß einer vorgegebenen Zeit ausführt, wobei die Qualitätsprüfungsdiagnoseverarbeitungszeit allgemein auf 15 - 30 Minuten festgelegt ist, vorzugsweise auf 20 Minuten.
• S260: Zugreifen auf den Wärmepumpen-Wassererhitzer-Controller 190 sowie auf das hochdruckseitige Druckerfassungsmodul 222, das niederdruckseitige Druckerfassungsmodul 223, das Versorgungsenergieerfassungsmodul 224 und das Wassermengenerfassungs- und -einstellmodul 225 über die Wärmepumpen-Wassererhitzer-Schnittstelleneinheit 220, aufeinanderfolgendes Sammeln der Testdaten vom getesteten Wärmepumpen-Wassererhitzer gemäß den durch die Basisdatentabelle bestimmten Online-Selbstdiagnoseerfassungselementen;
• S270: Vergleichen der Testdaten mit den entsprechenden Basisdaten für variable Betriebsbedingungen, und Beurteilen, ob die Qualitätsbewertungskriterien erfüllt sind;
• S280: wenn ein Element der Testdaten die Qualitätsbewertungskriterien nicht erfüllen kann: Anzeigen der Fehlerursache und des fehlerhaften Teils über das Qualitätsprüfungssteuerungsendgerät 212, und Bereitstellen einer Wartungsunterstützung für den getesteten Wärmepumpen-Wassererhitzer;
• S290: wenn alle Testdaten die Qualitätsbewertungskriterien erfüllen, ist der getestete Wärmepumpen-Wassererhitzer qualifiziert und wird die Qualitätsprüfungsdiagnose beendet;
• S300: Speichern der Qualitätsprüfungsergebnisdaten des getesteten Wärmepumpen-Wassererhitzers in einer Datenbank für Information über endgefertigte Produkte.

An implementation of the on-line self-diagnostic control method of the heat pump water heater of the present invention comprises the following steps as shown in FIG 3 is shown:

• S100: analyzing and calculating the operating state of the heat pump water heater for variable operating conditions, obtaining the basic data of the heat pump water heater for variable operating conditions by experimentally verifying the enthalpy difference and building the database for variable operating conditions for the heat pump water heater;
• S200: Input of the tested heat pump water heater type via the quality control control terminal 212 , Scanning the product barcode and reading the barcode information;
• S210: obtaining the operating environment data of the on-line self-diagnosis system of the heat pump water heater, the operating environment data including the dry bulb temperature and the wet bulb temperature of the operating environment of the heat pump water heater under test;
• S220: searching the variable operating condition database of the heat pump water heater according to the type and operating environment data of the tested heat pump water heater and obtaining the basic variable operating condition data and the quality evaluation criteria of the tested heat pump water heater in the current operating environment;
• S230: creating the basic data table of the heat pump water heater under test and determining the on-line self-diagnostic detection items;
• S240: Generating a setpoint value for the water flow rate of the tested unit and supplying the setpoint value to the heat pump water heater controller 190 about the Heat pump water heater interface unit 220 , Adjustment of the water flow of the tested heat pump water heater by the heat pump water heater controller 190 according to the water flow set point;
• S250: Controlling and starting the tested heat pump water heater 100 through the heat pump water heater controller 190 , where the tested heat pump water heater 100 executes the quality check diagnosis processing according to a predetermined time, wherein the quality check diagnosis processing time is generally set to 15-30 minutes, preferably 20 minutes.
• S260: Access the heat pump water heater controller 190 as well as on the high-pressure side pressure detection module 222 , the low-pressure side pressure acquisition module 223 , the supply energy acquisition module 224 and the water quantity detection and setting module 225 via the heat pump water heater interface unit 220 , sequentially collecting the test data from the heat pump water heater under test according to the online self-diagnosis acquisition items determined by the basic data table;
• S270: comparing the test data with the corresponding basic data for variable operating conditions, and judging whether the quality evaluation criteria are met;
• S280: when an item of the test data cannot meet the quality evaluation criteria: displaying the cause of the defect and the defective part via the quality inspection control terminal 212 , and providing maintenance support for the tested heat pump water heater;
• S290: if all the test data meet the quality evaluation criteria, the tested heat pump water heater is qualified and the quality check diagnosis is ended;
• S300: Store the quality check result data of the tested heat pump water heater in a database for information on finished products.

• S110: Versuchsproduktion einer Kleinserie von Test-Prototypen des endgefertigten Wärmepumpen-Wassererhitzers;
• S120: Ausführen eines Enthalpiedifferenztests für variable Umgebungsbetriebsbedingungen bezüglich der Kleinserie der Test-Prototypen;
• S130: Ausführen einer vergleichenden Analyse und einer Verifizierung bezüglich experimentellen Daten für variable Betriebsbedingungen, die durch einen Enthalpiedifferenztest erhalten werden, mit den theoretischen Konstruktionsdaten für variable Betriebsbedingungen;
• S140: die Basisdaten für variable Betriebsbedingungen und die Qualitätsbewertungskriterien werden unter Bezug auf die Produktdesignparameter und den Produktqualitätsstandard definiert;
• S150: ein Modell für variable Betriebsbedingungen des endgefertigten neuen Produkts des Wärmepumpen-Wassererhitzers wird durch Gruppieren und Klassifizieren der Basisdaten für variable Betriebsbedingungen und der Qualitätsbewertungskriterien gemäß dem Modell der Test-Prototypen aufgebaut;
• S160: die Datenbank für variable Betriebsbedingungen für den Wärmepumpen-Wassererhitzer wird durch Hinzufügen des Modells für variable Betriebsbedingungen zur Datenbank durch das Datenbankverwaltungssystem aufgebaut.

In the in 3 In the illustrated embodiment, the variable operating condition database of the heat pump water heater on-line self-diagnostic control method is constructed using the following steps:

• S110: Trial production of a small series of test prototypes of the finished heat pump water heater;
• S120: carrying out an enthalpy difference test for variable ambient operating conditions with respect to the small series of the test prototypes;
• S130: performing comparative analysis and verification on experimental data for variable operating conditions obtained by an enthalpy difference test with the theoretical design data for variable operating conditions;
• S140: the basic data for variable operating conditions and the quality evaluation criteria are defined with reference to the product design parameters and the product quality standard;
• S150: a model for variable operating conditions of the finished new product of the heat pump water heater is constructed by grouping and classifying the basic data for variable operating conditions and the quality evaluation criteria according to the model of the test prototypes;
• S160: the variable operating condition database for the heat pump water heater is constructed by adding the variable operating condition model to the database by the database management system.

According to one embodiment for building the database for variable operating conditions for the heat pump water heater, there are 5 units of a small series of test prototypes for an experimental production of a new product of a heat pump water heater of the same type, all prototypes being sent to an enthalpy difference laboratory in which one Detection for variable environmental operating conditions as well as a consistency verification of the small series production are carried out. By comparing the 5 groups of experimental data collected from 5 units of prototypes with the theoretical design data, if the experimental data agrees with the theoretical data, the theoretical data for variable operating conditions is confirmed and the theoretical data of this product type becomes the base data used to judge the quality of the same type of product. By classifying the basic data in the experimental verification and referring to the product design parameters and tolerance sizes of the heat pump water heater prescribed by national standards, the effective size of the basic data and the quality assessment criteria are determined, thereby building a model of variable operating conditions for the heat pump water heater, and the variable operating condition database for the heat pump water heater is constructed by adding the model to the database by the database management system.

4th Fig. 13 shows an embodiment of the structure of the basic data table from the variable operating condition database for the heat pump water heater. According to this embodiment, the basic data for variable operating conditions and the test data for variable operating conditions include the ambient dry-bulb temperature, the ambient wet-bulb temperature, the water inlet temperature, the water outlet temperature, the water flow rate, the outlet temperature, the suction temperature and the fin temperature, the high-pressure side pressure, the low-pressure side pressure , the supply voltage, the current and the power.

• (1) die Toleranz des hochdruckseitigen Drucks: ± 5%;
• (2) die Toleranz des niederdruckseitigen Drucks: ± 5%;
• (3) die Toleranz der Temperaturdifferenz des umgewälzten Wassers: ± 0,25°C (Grad Celsius);
• (4) die Toleranz der Lamellentemperatur: ± 3°C, wobei die Ansaugtemperatur nicht niedriger ist als die Umgebungstemperatur -8°C;
• (5) die Toleranz der Auslasstemperatur: ± 10%, wobei die Auslasstemperatur nicht niedriger ist als die Wasserbehältertemperatur +15°C;
• (6) die Toleranz der Ansaugtemperatur: ± 10%, wobei die Ansaugtemperatur nicht niedriger ist als die Umgebungstemperatur -5°C;
• (7) Leistungstoleranz: ± 10%;
• (8) Stromtoleranz: ± 10%, der Stromversorgungsdruck beträgt 220V/50Hz.

In this embodiment, the quality assessment criteria contain the following elements:

• (1) the tolerance of high pressure side printing: ± 5%;
• (2) the tolerance of the low pressure side pressure: ± 5%;
• (3) the tolerance of the temperature difference of the circulating water: ± 0.25 ° C (degrees Celsius);
• (4) the tolerance of the fin temperature: ± 3 ° C, whereby the suction temperature is not lower than the ambient temperature -8 ° C;
• (5) the outlet temperature tolerance: ± 10%, where the outlet temperature is not lower than the water tank temperature + 15 ° C;
• (6) the tolerance of the suction temperature: ± 10%, where the suction temperature is not lower than the ambient temperature -5 ° C;
• (7) Power tolerance: ± 10%;
• (8) Current tolerance: ± 10%, the power supply pressure is 220V / 50Hz.

Each of the embodiments described above serves only to explain and as an introduction to this invention, without the technical solution of the present invention being thereby restricted. It will be apparent to those skilled in the art that changes and modifications of the above embodiments can be implemented within the scope of the present invention as defined by the claims.

Industrial applicability

By building the database for variable operating conditions for the heat pump water heater, a test basis for the online self-diagnosis technology of a heat pump water heater is provided for the online self-diagnosis system of the heat pump water heater according to the invention and the control method and device. In addition, the test data for variable operating conditions is obtained using the heat pump water heater controller. By comparing the test data with the basic data for variable operating conditions in the database, the automatic online quality recording of the entire unit of the heat pump water heater is realized.

Using the test data obtained from the built-in function module of the heat pump water heater controller itself, there is no special test environment equipment and no special recording devices configured for the quality control system, as well as no connection and for its control method and device, in the heat pump water heater's online self-diagnosis system Installation is required between the quality inspection equipment and the heat pump water heater under test, which solves the technical problem of online quality inspection of the whole heat pump water heater unit, ensures the quality of the whole heat pump water heater unit, and also the cost of quality inspection of a product can be significantly reduced.

This technical solution is applicable to the areas of design and manufacture of fluid heating devices using a heat pump. It provides the on-line self-diagnosis system and control method therefor for the quality acquisition and control of a heat pump fluid heater and is widely applicable for data acquisition control in the industrial production process of heat pump water heater equipment, and is also used for the product service department to assess whether the product is working in normal operating condition, and also to quickly determine the cause of the fault and the faulty part of a defective unit.

Claims (10)

On-line self-diagnostic system for a heat pump water heater, which is used for an online product quality check on a production line for heat pump water heaters and for fault detection and evaluation of a product in customer service, wherein the heat pump water heater (100) has a compressor (110), a cold water condenser (120), an evaporator (140) and a water tank (160) connected to the cold water condenser (120), and a heat pump water heater controller (190) used to control the operation of the heat pump water heater (100) will, wherein the on-line self-diagnosis system for the heat pump water heater (100) is characterized in that: the on-line self-diagnosis system of the heat pump water heater (100) comprises a self-diagnosis control device, a high-pressure side pressure detection module (222), a low-pressure side pressure detection module (223), a supply energy detection module ( 224), a water quantity detection and setting module (225) and a database management system (300); the high-pressure side pressure detection module (222) is connected to a high pressure line of the compressor (110) and the low-pressure side pressure detection module (223) is connected to a low pressure line of the compressor (110), wherein the supply energy detection module (224) is connected to a power supply inlet of the heat pump water heater (100) is connected and the water amount detection and adjustment module (225) is connected to a cold water inlet of the heat pump water heater (100); the self-diagnosis control device comprises a data analysis unit (211), a quality check control terminal (212), an ambient temperature detection module (213) and a heat pump water heater interface unit (220); the quality control control terminal (212) and the ambient temperature detection module (213) are connected to the data analysis unit (211), the data analysis unit (211) being connected to the database management system (300), and via the database management system (300) to a database for variable operating conditions for the Heat pump water heater accesses; the heat pump water heater controller (190) has an RS485 interface module (221), the data analysis unit (211) with the RS485 interface module (221) of the heat pump water heater controller (190) via the heat pump water heater interface unit (220 ) communicates bidirectionally; and the high-pressure side pressure detection module (222), the low-pressure side pressure detection module (223), the supply energy detection module (224) and the water quantity detection and setting module (225) are connected to the data analysis unit (211) via the heat pump-water heater interface unit (220). Online self-diagnosis system according to Claim 1 , characterized in that the self-diagnosis control device has a network interface module (230) and the self-diagnosis control device is connected to a local or a remote database management system (300) via the network interface module (230). Online self-diagnosis system according to Claim 1 , characterized in that the high-pressure side pressure detection module (222), the low-pressure side pressure detection module (223), the supply energy detection module (224) and / or the water volume detection and setting module (225) are function modules of the heat pump water heater controller (190), the Data analysis unit (211) via the RS485 interface module (221) connected to the heat pump water heater interface unit (220) is connected to the corresponding functional modules of the heat pump water heater controller (190) in order to obtain corresponding test data for variable operating conditions. On-line self-diagnostic control method for a heat pump water heater based on an on-line self-diagnostic system for a heat pump water heater Claim 1 , 2 or 3 is applied, characterized by the following steps: S1: Analyzing and calculating the operating conditions of the heat pump water heater (100), confirming the basic data for variable operating conditions and the quality assessment criteria of the heat pump water heater (100) by experimental verification of the enthalpy difference and building the database for variable operating conditions for the heat pump water heater (100); S2: connecting the self-diagnostic control device to the heat pump water heater controller (190) and obtaining the test data for variable operating conditions for the heat pump water heater (100) via the heat pump water heater controller (190); and S3: comparing the test data for variable operating conditions with the basic data for variable operating conditions from the database for variable operating conditions and judging the quality of the heat pump water heater (100) according to the quality evaluation criteria. Online self-diagnostic control procedure according to Claim 4 , characterized in that step S1 comprises the following steps: S110: trial production of a small series of test prototypes of the finished heat pump water heater (100) S120: carrying out an enthalpy difference test for variable ambient operating conditions with regard to the small series of test prototypes; S130: performing a comparative analysis and verification on the experimental data for variable operating conditions obtained by an enthalpy difference test with the theoretical design data for variable operating conditions; S140: the basic data for variable operating conditions and the quality evaluation criteria are defined with reference to the product design parameters and the product quality standard; S150: a model of variable operating conditions for the finished new product of the heat pump water heater (100) is constructed by grouping and classifying the basic data for variable operating conditions and the quality evaluation criteria according to the model of the test prototypes; and S160: the variable operating condition database for the heat pump water heater (100) is constructed by adding the variable operating condition model to the database through the database management system (300). Online self-diagnostic control procedure according to Claim 4 , characterized in that the basic data for variable operating conditions and the test data for variable operating conditions are the ambient dry-bulb temperature, the ambient wet-bulb temperature, the water inlet temperature, the water outlet temperature, the water flow rate, the outlet temperature, the suction temperature and the fin temperature and the high-pressure side pressure, the low-pressure side Pressure, supply voltage, current and power. Online self-diagnostic control procedure according to Claim 4 or 5 characterized in that the quality evaluation criteria include the following items: (1) Tolerance of high-pressure side printing: ± 5%; (2) Low side pressure tolerance: ± 5%; (3) Tolerance of the temperature difference of the circulated water: ± 0.25 ° C; (4) Fin temperature tolerance: ± 3 ° C, and suction temperature is not lower than the ambient temperature -8 ° C; (5) Outlet temperature tolerance: ± 10%, and the outlet temperature not lower than the water tank temperature + 15 ° C; (6) Tolerance of suction temperature: ± 10%, and the suction temperature is not lower than ambient temperature -5 ° C; (7) Power tolerance: ± 10%; (8) Current tolerance: ± 10% at a power supply pressure of 220V / 50Hz. Online self-diagnosis control unit for a heat pump water heater, which is used for the online self-diagnosis system for a heat pump water heater Claim 1 , 2 or 3 is used and connected to the heat pump water heater controller (190) and the database management system (300), characterized in that: the on-line self-diagnostic controller, a data analysis unit (211), a quality control control terminal (212), an ambient temperature detection module (213), a A heat pump-water heater interface unit (220), a high-pressure side pressure detection module (222), a low-pressure side pressure detection module (223), a supply energy detection module (224) and a water quantity detection and setting module (225); the quality control control terminal (212) and the ambient temperature detection module (213) are connected to the data analysis unit (211), the data analysis unit (211) being connected to the database management system (300), and via the database management system (300) to the database for variable operating conditions for the Heat pump water heater accesses; the heat pump water heater controller (190) has an RS485 interface module (221), the data analysis unit (211) via the heat pump water heater interface unit (220) with the RS485 interface module (221) of the heat pump water heater controller (190 ) communicates bidirectionally; and the high-pressure side pressure detection module (222), the low-pressure side pressure detection module (223), the supply energy detection module (224) and the water quantity detection and setting module (225) are connected to the data analysis unit (211) via the heat pump-water heater interface unit (220). Online self-diagnostic control unit Claim 8 , characterized in that the self-diagnosis control device has a network interface module (230) and the self-diagnosis control device is connected to a local or a remote database management system (300) via the network interface module (230). Online self-diagnostic control unit Claim 8 , characterized in that the high-pressure side pressure detection module (222), the low-pressure side pressure detection module (223), the supply energy detection module (224) and / or the water volume detection and setting module (225) are function modules of the heat pump water heater controller (190), the Data analysis unit (211) via the RS485 interface module (221) connected to the heat pump water heater interface unit (220) is connected to the corresponding functional modules of the heat pump water heater controller (190) in order to obtain corresponding test data for variable operating conditions.

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